Mercurial > whatever / changeset

--- a/content/10MHz_ref.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/10MHz_ref.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -22,25 +22,25 @@
 
 The device is a small enclosure with only a 2x5 pins connector:
 
-.. image:: {filename}images/freq_ref/efratom.jpg
+.. image:: {static}images/freq_ref/efratom.jpg
    :alt: The Efratom LPRO-101 frequency standard.
       
 The exact model is an Efratom Rubidium Frequency Standard Model LPRO-101:
 
-.. image:: {filename}images/freq_ref/efratom_sticker.jpg
+.. image:: {static}images/freq_ref/efratom_sticker.jpg
    :alt: The Efratom LPRO-101 frequency standard.
 
 Inside the enclosure, there is a single PCB with SMD and through hole
 components. It's quite dense.
 
-.. image:: {filename}images/freq_ref/efratom_inside.jpg
+.. image:: {static}images/freq_ref/efratom_inside.jpg
    :alt: The PCB of the Efratom LPRO-101 frequency standard.
 
 The rubidium lamp with the resonant cavity occupy almost a quarter of the
 total area. The cover of the enclosure is compartimented, mainly to
 shield the lamp+cavity device from the remaining of the board:
 
-.. image:: {filename}images/freq_ref/efratom_enclosure.jpg
+.. image:: {static}images/freq_ref/efratom_enclosure.jpg
    :alt: The enclosure of the Efratom LPRO-101 frequency standard.
 
 
@@ -60,7 +60,7 @@
 
 The video amplifer on the other hand has a bit of a trouble:
 
-.. image:: {filename}images/freq_ref/extron.jpg
+.. image:: {static}images/freq_ref/extron.jpg
    :alt: the Extron Electronics video amplifier
       
 As you can see on the picture above, the inductor is broken, and there
@@ -79,7 +79,7 @@
 datasheet_, in the Bipolar Output DC/DC Converter configuration page
 16:
 
-.. image:: {filename}images/freq_ref/lt1616_bipolar_output_DC2DC.svg
+.. image:: {static}images/freq_ref/lt1616_bipolar_output_DC2DC.svg
    :alt: LT1616 Bipolar Output DC/DC converter.
    :align: center
 
@@ -94,7 +94,7 @@
 reference design, it should be a 22µH one. So let's make a purchase
 for this inductor as well as some 20k resistors for my HP8904A_.
 
-.. _HP8904A: {filename}hp8904a.rst
+.. _HP8904A: {static}hp8904a.rst
 
 
 

--- a/content/10MHz_ref_2.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/10MHz_ref_2.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -17,14 +17,14 @@
 Desoldering and soldering SMD parts without an air flow station is a
 bit tricky, but eventually I succeded in replacing the broken inductor.
 
-.. image:: {filename}/images/freq_ref/extron_fixed.jpg
+.. image:: {static}/images/freq_ref/extron_fixed.jpg
 	   :alt: The Extron Video Distribution Amplifier fixed with a
                  new inductor for its small DC-DC converter.
 
 Now the "video" amplifier works like a charm. The 10MHz signal is
 nicely amplified:
 
-.. image:: {filename}/images/freq_ref/extron_working_10MHz.jpg
+.. image:: {static}/images/freq_ref/extron_working_10MHz.jpg
 	   :alt: The Extron Video Distribution Amplifier dispatching a
                  10MHz signal to several equipments.
 
@@ -34,7 +34,7 @@
 using the input of my scope set at 50ohm) that the amplification
 factor is exactly x2.
 
-.. image:: {filename}/images/freq_ref/extron_dephasing_10MHz.jpg
+.. image:: {static}/images/freq_ref/extron_dephasing_10MHz.jpg
 	   :alt: The Extron Video Distribution Amplifier dephasing at 10MHz.
 
 What I need to check carefully now is if all the outputs of the
@@ -54,4 +54,4 @@
 .. _`new thread on the EEVBlog`: http://www.eevblog.com/forum/projects/distribution-amp-%28for-reference-frequency-standard-or-otherwise%29/msg893851/
 
 
-.. _`first part`: {filename}/10MHz_ref.rst
+.. _`first part`: {static}/10MHz_ref.rst

--- a/content/HPZR24W.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/HPZR24W.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -30,7 +30,7 @@
 - a blacklight HV driver board.
 
 
-.. image:: {filename}images/ZR24W/back.jpg
+.. image:: {static}images/ZR24W/back.jpg
    :alt: Back of the HP ZR24W
 
 First thing, to make sure the problem comes from the PSU, I powered the monitor
@@ -39,16 +39,16 @@
 enough to power the backlight. The second output was used to produce the 12V,
 and the 5V was generated by my very old home made PSU.
 
-.. image:: {filename}images/ZR24W/ext_power.jpg
+.. image:: {static}images/ZR24W/ext_power.jpg
    :alt: Testing the display with my bench PSU.
 
 The monitor was working fine when powered from these PSUs, so the problem was,
 indeed, this Tatung PWB-1336-02 switching PSU:
 
-.. image:: {filename}images/ZR24W/psu_top.jpg
+.. image:: {static}images/ZR24W/psu_top.jpg
    :alt: Top of the Tatung PWB-1336-02 PSU
 
-.. image:: {filename}images/ZR24W/psu_bottom.jpg
+.. image:: {static}images/ZR24W/psu_bottom.jpg
    :alt: Bottom view of the Tatung PWB-1336-02 PSU
 
 The design is nice and clean. Electrolytic caps however are not the best ones
@@ -85,7 +85,7 @@
 
 
 My first test has been to plug my cheap `electronic load
-<{filename}/ZPB30A1.rst>`_ on the 5V with the 2 other voltages stopped.
+<{static}/ZPB30A1.rst>`_ on the 5V with the 2 other voltages stopped.
 
 And I could reliably sink 3A from there. So the problem must be on one of the 2
 other rails.
@@ -104,7 +104,7 @@
 is some kind of a joke on the Rigol, since you cannot hide the A and B curves:
 the curve substraction is purely computed from displayed curve. When I found
 how useless this was on the Rigol, I had not enough energy to extract my old
-`Tek 2445A <{filename}/TeK2445.rst>`_ from under the pile of test equipment
+`Tek 2445A <{static}/TeK2445.rst>`_ from under the pile of test equipment
 stowed in the closet...)
 
 
@@ -146,10 +146,10 @@
 
 The application circuits are as follow:
 
-.. image:: {filename}images/ZR24W/tny279_app_circuit.svg
+.. image:: {static}images/ZR24W/tny279_app_circuit.svg
    :alt: Example application circuit for the TNY279PN controller (from the `datasheet <TNY279PN>`_)
 
-.. image:: {filename}images/ZR24W/CM6807_app_circuit.svg
+.. image:: {static}images/ZR24W/CM6807_app_circuit.svg
    :alt: Example application circuit for the CM6807 controller (from the `datasheet <CM6807>`_)
 
 In this PSU, the input DC of the TNY279 (the point just before R5 in the app
@@ -160,7 +160,7 @@
 there is derivated DC input path, from the bridge rectifier to the input DC
 rail, consisting in a diode (D922 on the PCB) followed by a thermistor (R915):
 
-.. image:: {filename}images/ZR24W/input_DC.jpeg
+.. image:: {static}images/ZR24W/input_DC.jpeg
    :alt: Input DC showing both paths (yellow: via the PFC, red: the alternate
          path when power saving is on).
 

--- a/content/LPD422FM.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/LPD422FM.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -9,7 +9,7 @@
 This post is a quick presentation and teardown of a small bench power
 supply I bought on ebay a few weeks ago for something like 40€.
 
-.. image:: {filename}/images/lambda/lpd422fm_overall.jpg
+.. image:: {static}/images/lambda/lpd422fm_overall.jpg
    :alt: The Lambda LPD 422 FM dual regulated power supply.
 
 It's an old unit, not sure it's exact age, but the components inside
@@ -33,28 +33,28 @@
 It seems to be "remote programmable", and have remote sensor entries
 on the back of the unit.
 
-.. image:: {filename}/images/lambda/lpd422fm_back.jpg
+.. image:: {static}/images/lambda/lpd422fm_back.jpg
    :alt: Rear view of the LPD 422 FM dual regulated power supply.
 
 Inside the enclosure:
 
-.. image:: {filename}/images/lambda/lpd422fm_top.jpg
+.. image:: {static}/images/lambda/lpd422fm_top.jpg
    :alt: Top view of the LPD 422 FM dual regulated power supply.
 
 Each of the 2 power supplies have a regulator board on each side of
 the enclosure. The power transformer is sitting at the center of the
 enclosure and shows a nice "Component Location Diagram":
 
-.. image:: {filename}/images/lambda/lpd422fm_xformer.jpg
+.. image:: {static}/images/lambda/lpd422fm_xformer.jpg
    :alt: The power transformer of the LPD 422 FM dual regulated power supply.
 
 A regulator board looks like:
 
-.. image:: {filename}/images/lambda/lpd422fm_board2.jpg
+.. image:: {static}/images/lambda/lpd422fm_board2.jpg
    :alt: Top view of one regulator of the LPD 422 FM dual regulated
          power supply.
 
-.. image:: {filename}/images/lambda/lpd422fm_board1.jpg
+.. image:: {static}/images/lambda/lpd422fm_board1.jpg
    :alt: Bottom view of one regulator of the LPD 422 FM dual regulated
          power supply.
 	 
@@ -70,10 +70,10 @@
 ========================
 
 - `Lambda LP, LPD & LPT series catalog
-  <{filename}/pdfs/lambda/LAMBDA_LPD_LPD_LPT_series.pdf>`_
+  <{static}/pdfs/lambda/LAMBDA_LPD_LPD_LPT_series.pdf>`_
 
 - `Instruction and Service Manual for Lambda LPD suffix A Series Power
-  Supplies <{filename}/pdfs/lambda/LambdaLPD.pdf>`_: this is not
+  Supplies <{static}/pdfs/lambda/LambdaLPD.pdf>`_: this is not
   exactly the same model, but it really very close.
 
 
@@ -86,35 +86,35 @@
 
 First, a view of the noise at the output of the PSU; 0V, no load:
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint2.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint2.png
    :alt: Noise level of the LPD422FM - 0V/0A
       
 Same at 20V, no load:
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint3.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint3.png
    :alt: Noise level of the LPD422FM - 20V/0A
 
 And at maximum voltage (40V, no load):
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint4.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint4.png
    :alt: Noise level of the LPD422FM - 40V/0A
 
-Then, with the `ZPB30A1 electronic load <{filename}/ZPB30A1.rst>`
+Then, with the `ZPB30A1 electronic load <{static}/ZPB30A1.rst>`
 connected but not consuming any current (20V, 0A):
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint5.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint5.png
    :alt: Noise level of the LPD422FM connected to the ZPB30A1 - 20V/0A
 
 As you can see, there is a much higher injected by the electronic
 load. When measuring the visible pattern:
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint6.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint6.png
    :alt: Noise level of the LPD422FM connected to the ZPB30A1 - 20V/0A
 
 it's a 20ms pattern, ie. it's the mains 50Hz being injected... Let's
 turn the load on (20V, 0.5A):
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint7.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint7.png
    :alt: Noise level of the LPD422FM connected to the ZPB30A1 - 20V/0.5A
 
 The injected noise from the mains has vanished, and the RMS noise
@@ -122,7 +122,7 @@
 
 At 1 amp, it's roughly the same:
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint8.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint8.png
    :alt: Noise level of the LPD422FM connected to the ZPB30A1 - 20V/1A
 
 Now, trying to capture the transient curve when activating and
@@ -131,10 +131,10 @@
 easier. So I've just adjusted the trigger level to single capture the
 moment I press the 'on/off' button of the load:
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint10.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint10.png
    :alt: Transient response of the LPD422FM connected to the ZPB30A1 - 20V/1A -> 0A
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint11.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint11.png
    :alt: Transient response of the LPD422FM connected to the ZPB30A1 - 20V/0A -> 1A
 
 The overshoot is around 75mV and takes around 200ms to vanish, and the
@@ -142,7 +142,7 @@
 
 At one amp, the ripple voltage is around 8mVpp and 3mVrms:
 
-.. image:: {filename}/images/lambda/DS1Z_QuickPrint13.png
+.. image:: {static}/images/lambda/DS1Z_QuickPrint13.png
    :alt: Ripple voltage of the LPD422FM connected to the ZPB30A1 - 20V/1A
 
 It's quite out of spec: ripple should be less than 500µVrms and

--- a/content/TeK2445.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/TeK2445.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -15,15 +15,15 @@
 
 Here is the beast:
 
-.. image:: {filename}images/tek2445/tek2445.jpg
+.. image:: {static}images/tek2445/tek2445.jpg
    :alt: My old Tektronics 2445 scope
       
 And some pictures of its womb:
 
-.. image:: {filename}images/tek2445/tek2445_A1.jpg
+.. image:: {static}images/tek2445/tek2445_A1.jpg
    :alt: The main analog board.
 	   
-.. image:: {filename}images/tek2445/tek2445_top.jpg
+.. image:: {static}images/tek2445/tek2445_top.jpg
    :alt: Top view of the scope.
 
 The PSU consists in two PCBs coupled with long jumpers. It's not very
@@ -33,19 +33,19 @@
 Whatever, its problem was a classic failure of several X2 and Y
 capacitors on the regulator board (A2):
 
-.. image:: {filename}images/tek2445/PSU_A2.png
+.. image:: {static}images/tek2445/PSU_A2.png
    :alt: The regulator board os the PSU.
 
-.. image:: {filename}images/tek2445/board_a2.jpg
+.. image:: {static}images/tek2445/board_a2.jpg
    :alt: The regulator board os the PSU.
 	 
-.. image:: {filename}images/tek2445/board_a2_C1018.jpg
+.. image:: {static}images/tek2445/board_a2_C1018.jpg
    :alt: Dead C1018 capacitor.
 	 
 
 and the inverter board (A3), mainly C1020, C1051 and C1052:
 
-.. image:: {filename}images/tek2445/PSU_A3.png
+.. image:: {static}images/tek2445/PSU_A3.png
    :alt: The inverter board of the PSU.
 
 	 

--- a/content/TeK2445_2.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/TeK2445_2.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -9,10 +9,10 @@
 :series_index: 2
 
 After a `quick repair of the PSU of my Tek 2445
-<{filename}/TeK2445.rst>`_, I've started a more systematic replacement
+<{static}/TeK2445.rst>`_, I've started a more systematic replacement
 of the capacitors.
 
-.. image:: {filename}/images/tek2445/psu_caps_replaced.jpg
+.. image:: {static}/images/tek2445/psu_caps_replaced.jpg
    :alt: Tek2445 PSU Caps being replaced.
 
 But I was also a bit worried because of a dirty noise coming from the
@@ -46,7 +46,7 @@
 hey, there is no way higher ESR could lead to overcurrent flowing
 through this resistor).
 
-.. image:: {filename}/images/tek2445/psu_prereg.png
+.. image:: {static}/images/tek2445/psu_prereg.png
    :alt: Schematic of the preregulator of teh Tek2445
 
 But powering up and down the PSU again and again, with its freaking
@@ -57,7 +57,7 @@
 exact specifications of the device; the service manual do not give the
 value of the resistor in parallel with the 2.5µH inductance.
 
-.. image:: {filename}/images/tek2445/dead_transistors.jpg
+.. image:: {static}/images/tek2445/dead_transistors.jpg
    :alt: Q1050, 1060 and Q1070 are dead.
       
 For now, I've picked up a 3W 100Ω resistor and I've made a self by
@@ -77,7 +77,7 @@
 died. The transistor is a 2N3905 (which I don't have around either) so
 I've replaced it with a bigger TIP32C.
 
-.. image:: {filename}/images/tek2445/beafier_transistors.jpg
+.. image:: {static}/images/tek2445/beafier_transistors.jpg
    :alt: Beafier replacement rtansistors, and a handmade coil.
 
 From there, I began to check most of the components in this
@@ -89,7 +89,7 @@
 behavior of the Q1020/Q1021 stage. Their purpose is to regulate the
 supply voltage for the U1030 main oscillator.
 
-.. image:: {filename}/images/tek2445/psu_prereg_test.jpg
+.. image:: {static}/images/tek2445/psu_prereg_test.jpg
    :alt: Testing the main control oscillator.
 
 At power-up time, when the oscillator has not yet started, R1020 fill

--- a/content/TeK2445_3.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/TeK2445_3.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -10,7 +10,7 @@
 
 
 After having mostly `destroyed the PSU of my Tek 2445
-<{filename}/TeK2445_2.rst>`_, I've decided to be a bit less foolhardy
+<{static}/TeK2445_2.rst>`_, I've decided to be a bit less foolhardy
 and I've subscribed to the `yahoo Tek group`_. I discovered that such
 a failure has already been reported there, also after a full recap of
 the preregulator and regulator of the power supply.
@@ -23,12 +23,12 @@
 resistor and I wrapped some 34 gauge wire around. The result is a bit
 cleaner, from:
 
-.. image:: {filename}/images/tek2445/lr1060.jpg
+.. image:: {static}/images/tek2445/lr1060.jpg
    :alt: first attempt of a hand made LR1060 chocke.
 
 to:
 
-.. image:: {filename}/images/tek2445/lr1060_v2.jpg
+.. image:: {static}/images/tek2445/lr1060_v2.jpg
    :alt: a better hand made LR1060 chocke.
 
 
@@ -50,7 +50,7 @@
 This transformer is a small input transformer with 4 coils around a
 common ferrite core:
 
-.. image:: {filename}/images/tek2445/tr1050.jpg
+.. image:: {static}/images/tek2445/tr1050.jpg
    :alt: The T1050 input transformer.
 
 I was not sure of the specifications of each coil, since mine as (at
@@ -82,18 +82,18 @@
 
 I've also quickly checked the voltage ratios using a 42kHz signal:
 
-.. image:: {filename}/images/tek2445/tr1050_ratio_measurement.jpg
+.. image:: {static}/images/tek2445/tr1050_ratio_measurement.jpg
    :alt: Measuring the turn-ratios of the T1050 transformer.
 
 I use CH2 of my scope to probe the signal produced by the `HP890A4
-<{filename}/hp8904a.rst>`_ linked to pins 1 and 2 (thus a primary
+<{static}/hp8904a.rst>`_ linked to pins 1 and 2 (thus a primary
 winding), and CH1 on a secondary winding (pins 6-7), which resulted
 in:
 
-.. image:: {filename}/images/tek2445/DS1Z_QuickPrint17.png
+.. image:: {static}/images/tek2445/DS1Z_QuickPrint17.png
    :alt: Measuring the turn-ratios of the T1050 transformer.
 
-.. image:: {filename}/images/tek2445/DS1Z_QuickPrint18.png
+.. image:: {static}/images/tek2445/DS1Z_QuickPrint18.png
    :alt: Measuring the turn-ratios of the T1050 transformer.
 
 As one can see, the turn ratio seems to be 10. Both the 2 secondary
@@ -118,12 +118,12 @@
 
   The test load consist in:
 
-.. image:: {filename}/images/tek2445/psu_test_load.png
+.. image:: {static}/images/tek2445/psu_test_load.png
    :alt: Primary Test Load.
 
 So I built one and connected it:
 
-.. image:: {filename}/images/tek2445/psu_with_test_load.jpg
+.. image:: {static}/images/tek2445/psu_with_test_load.jpg
    :alt: The PSU with the test load in place of T1060.
 
 Was a little anxious when I switch the PSU on, but it did not
@@ -136,7 +136,7 @@
 reinstalled the PSU in the scope, and gave it a try:
 
 
-.. image:: {filename}/images/tek2445/back_from_the_death.jpg
+.. image:: {static}/images/tek2445/back_from_the_death.jpg
    :alt: It's alive!
 
 At last!
@@ -184,7 +184,7 @@
 
 For the fun:
 
-.. image:: {filename}/images/tek2445/side_by_side.jpg
+.. image:: {static}/images/tek2445/side_by_side.jpg
    :alt: Side-by-side: DS1054Z vs. Tek2445
 
 Despite the fact the Rigol DS1054Z has an incredible number of
@@ -193,7 +193,7 @@
 directly accessible. And yet, I don't think the Rigol can measure both
 the rise and fall time (with a decent precision) of a square wave:
 
-.. image:: {filename}/images/tek2445/rise_and_fall.jpg
+.. image:: {static}/images/tek2445/rise_and_fall.jpg
    :alt: Side-by-side: DS1054Z vs. Tek2445
 
 Beautiful double time-base!

--- a/content/ZPB30A1.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/ZPB30A1.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -26,7 +26,7 @@
   stops. It displays the total discharged capacitu (in Ah) and energy
   (in Wh).
 
-.. image:: {filename}images/ZPB30A1/zpb30a1.jpg
+.. image:: {static}images/ZPB30A1/zpb30a1.jpg
    :alt: Overall view of the ZPB30A1 electronic load
   
 The device looks pretty nice and reasonably well built. It can do 4
@@ -35,14 +35,14 @@
 The device itself is built around a single ST W60N10 N channel MOS
 transistor (100V, 60A, 200W) and a STM8S005K6 microcontroller.
 
-.. image:: {filename}images/ZPB30A1/zpb30a1_board.jpg
+.. image:: {static}images/ZPB30A1/zpb30a1_board.jpg
    :alt: Main PCB of the ZPB30A1 electronic load
 
 The shunt resistor is a 10mΩ wire. A very small value that explains
 the rather big minimal current of 200mA (which means a voltage drop as
 low as 2mV).
 
-.. image:: {filename}images/ZPB30A1/zpb30a1_mosfet.jpg
+.. image:: {static}images/ZPB30A1/zpb30a1_mosfet.jpg
    :alt: Main transistor of the ZPB30A1 electronic load
 
 One nice thing with this device is the fact that every component value
@@ -51,7 +51,7 @@
 
 The bottom side of the PCB is pretty empty besides the ground plane.
 
-.. image:: {filename}images/ZPB30A1/zpb30a1_bottom.jpg
+.. image:: {static}images/ZPB30A1/zpb30a1_bottom.jpg
    :alt: Bottom side of the PCB of the ZPB30A1 electronic load
 
 
@@ -80,7 +80,7 @@
 
 The overall (messy) setup was:
 
-.. image:: {filename}images/ZPB30A1/overall_setup.jpg
+.. image:: {static}images/ZPB30A1/overall_setup.jpg
    :alt: Overall testing setup for the ZPB30A1.
 
 During this test, the electronic load was sunking almost 1A at 30V,
@@ -92,12 +92,12 @@
 the signal is meaningful. And after playing a bit with the Serial
 decoder, I finally found that:
 
-.. image:: {filename}images/ZPB30A1/DS1Z_serial.png
+.. image:: {static}images/ZPB30A1/DS1Z_serial.png
    :alt: Serial signal on the T pin.
 
 When the ZPB30A1 was actually set up like this:
 	
-.. image:: {filename}images/ZPB30A1/zpb30a1_setup.jpg
+.. image:: {static}images/ZPB30A1/zpb30a1_setup.jpg
    :alt: Testing setup for the ZPB30A1.
 
 So the measured voltage is constantly written on the serial port at

--- a/content/eip545b.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/eip545b.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -12,7 +12,7 @@
 I recently purchased a broken EIP 545B microwave frequency counter on ebay. It
 was very inexpensive (around 150€ delivered), but obviously, non working.
 
-.. image:: {filename}images/eip545b/closed_unit.jpg
+.. image:: {static}/images/eip545b/closed_unit.jpg
    :alt: The EIP 545B RF Counter
 
 The device was described as "does not power up", an is clearly not in very good
@@ -20,12 +20,12 @@
 
 But inside, it was **very** dusty and a bit rusty:
 
-.. image:: {filename}images/eip545b/inside.jpg
+.. image:: {static}/images/eip545b/inside.jpg
    :alt: Once opened, it's very dusty
 
 The YIG filter looking not so good:
 
-.. image:: {filename}images/eip545b/rusty_yig.jpg
+.. image:: {static}/images/eip545b/rusty_yig.jpg
    :alt: The rusty YIG filter
 
 
@@ -41,18 +41,18 @@
 So the first step has been to check wether the PSU is working fine. Overall, it
 looks OK:
 
-.. image:: {filename}images/eip545b/psu.jpg
+.. image:: {static}/images/eip545b/psu.jpg
    :alt: The A101 PSU board
 
 There are many tantalum capacitors in this unit, including on the PSU board:
 
-.. image:: {filename}images/eip545b/psu_tantalums.jpg
+.. image:: {static}/images/eip545b/psu_tantalums.jpg
    :alt: Tantalum capacitors on the PSU board
 
 But they seem OK, so I gave it a try with no load, but using a variac to rise
 the input voltage slowly:
 
-.. image:: {filename}images/eip545b/psu_test.jpg
+.. image:: {static}/images/eip545b/psu_test.jpg
    :alt: Testing the PSU board
 
 I plan to build myself a nice isolation transformer unit using this variac, a
@@ -97,7 +97,7 @@
 
 Once fixed, the unit did power up, and reacted to some keys:
 
-.. image:: {filename}images/eip545b/test_cpu.jpg
+.. image:: {static}/images/eip545b/test_cpu.jpg
    :alt: Testing the unit with only the CPU board
 
 So far so good. Now the time for testing the other boards.
@@ -114,13 +114,13 @@
 
 Let's put some signal, first a 6MHz on the band 1 input:
 
-.. image:: {filename}images/eip545b/working_band1.jpg
+.. image:: {static}/images/eip545b/working_band1.jpg
    :alt: Testing a 6MHz signal on band 1 input
 
 It works! I quickly checked band 2 (using a piece of wire since the connector
 is broken), and it seems to work fine. And band 3:
 
-.. image:: {filename}images/eip545b/working_band3.jpg
+.. image:: {static}/images/eip545b/working_band3.jpg
    :alt: Testing a 1GHz signal on band 3 input
 
 

--- a/content/eip545b_2.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/eip545b_2.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -47,7 +47,7 @@
 resolution:
 
 
-.. image:: {filename}images/eip545b/pm_full.jpg
+.. image:: {static}images/eip545b/pm_full.jpg
    :alt: Power Meter at full resolution
 
 *On avance !*

--- a/content/eip545b_3.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/eip545b_3.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -172,12 +172,12 @@
 On one side is the ceramic support for connections from the output YIG coupling
 loop:
 
-.. image:: {filename}images/eip545b/yig_top.jpg
+.. image:: {static}images/eip545b/yig_top.jpg
    :alt: Top view of the YIG filter
 
 On the bottom side, we can see the YIG spheres and the coupling loops:
 
-.. image:: {filename}images/eip545b/yig_bottom.jpg
+.. image:: {static}images/eip545b/yig_bottom.jpg
    :alt: Top view of the YIG filter
 
 So this filter consists in a 2 stage bandpass filter (with input and output
@@ -185,7 +185,7 @@
 
 Having a closer look, the problem appears:
 
-.. image:: {filename}images/eip545b/yig_broken.jpg
+.. image:: {static}images/eip545b/yig_broken.jpg
    :alt: Broken stage 1 of the YIG filter
 
 As can been seen there, the YIG sphere took off the holding rod. Tha cage made

--- a/content/eip545b_4.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/eip545b_4.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -12,7 +12,7 @@
 This part is about my attempt to modify the firmware to "fix" the problem of
 weird intial setup: a -160MHz offset and a resolution set to 5 digits.
 
-In the `previous part <{filename}/eip545b_3.rst>`_, we figured some probable
+In the `previous part <{static}/eip545b_3.rst>`_, we figured some probable
 spots in the firware where these default setup configurations might be set.
 
 EPROM checksums

--- a/content/eip545b_6.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/eip545b_6.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -13,8 +13,8 @@
 ==================
 
 I have been trying to figure out a bit more about the `sensitivity problem
-<{filename}/eip545b_3.rst#sensitivity-problem>`_ described in `part 3
-<{filename}eip545b_3.rst>`_.
+<{static}/eip545b_3.rst#sensitivity-problem>`_ described in `part 3
+<{static}eip545b_3.rst>`_.
 
 The main problem remains the first YIG sphere that has fall off the holding
 rod. I have tried to manipulate it with thin wood stick, under my cheap USB
@@ -31,12 +31,12 @@
 
 The overall process of the Band 3 is as follow:
 
-.. image:: {filename}images/eip545b/band_3_operations.png
+.. image:: {static}images/eip545b/band_3_operations.png
    :alt: Simplified Band 3 Operations
 
 For which the first step is the search for signal:
 
-.. image:: {filename}images/eip545b/band_3_search.png
+.. image:: {static}images/eip545b/band_3_search.png
    :alt: Band 3 Search for Signal
 
 I seems to me that the RF level is used for two purposes: in the search for
@@ -62,7 +62,7 @@
 In order to understand, I have drawn the schematics of the board on which are
 the IF amplifier and the video amplifier:
 
-.. image:: {filename}images/eip545b/A201_2020303.jpg
+.. image:: {static}images/eip545b/A201_2020303.jpg
    :alt: A201 RF amplifier board
 
 Fortunately, the board is quite simple, and despite being made of SMD
@@ -70,7 +70,7 @@
 
 The schematics looks like:
 
-.. image:: {filename}images/eip545b/A201.svg
+.. image:: {static}images/eip545b/A201.svg
    :alt: Schematic of the A201 RF amplifier board
 
 The video amplifier consist of a simple MC1458 opamp (mainly a dual 741).
@@ -98,7 +98,7 @@
 
 The YIG tuned filter and mixer assembly looks like:
 
-.. image:: {filename}images/eip545b/YIG-mixer.jpg
+.. image:: {static}images/eip545b/YIG-mixer.jpg
    :alt: YIG filter output and mixer assembly
 
 Once again, I am trying to understand what this whole thing works, but I really

--- a/content/hp3456a.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp3456a.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -30,7 +30,7 @@
 but the readings were quite disappointing. I was considering
 implementing a signature analyzer using a Nucleo STM32 board, since I
 have several of them for my `HP 34970A display replacement project
-<{filename}/hp34970a.rst>`_.
+<{static}/hp34970a.rst>`_.
 
 Suddenly, I realized I did not even check the power rails! And
 bingo, the +33V was dead (something like 5V).
@@ -38,20 +38,20 @@
 Ok, much better, a power supply failure is a way better
 news. Especially since this kind of device uses a linear power supply:
 
-.. image:: {filename}/images/hp3456a/psu.jpg
+.. image:: {static}/images/hp3456a/psu.jpg
    :alt: HP 3456A's power supply board
 
 Yes, it is very dusty.
 The culprit appeared in plain sight as soon as I removed the power
 supply board (A10) from the unit:
 
-.. image:: {filename}/images/hp3456a/psu_C7.jpg
+.. image:: {static}/images/hp3456a/psu_C7.jpg
    :alt: failing caps on HP 3456A's power supply
 
 The schematic is very straighforward; few bridge rectifiers, some
 capatcitors, some regultators, nothing fancy:
 
-.. image:: {filename}/images/hp3456a/psu_schematic.svg
+.. image:: {static}/images/hp3456a/psu_schematic.svg
    :alt: schematic of the power supply board
 
 The dead capacitor is C7 (47µF, 50V, Sprague). I also checked the
@@ -69,19 +69,19 @@
 
 Whatever, after this quick recap, the 3456A is back alive:
 
-.. image:: {filename}/images/hp3456a/1.0011v.jpg
+.. image:: {static}/images/hp3456a/1.0011v.jpg
    :alt: 1.0011V
 
 And even better, it look much more stable than it used to be!
 
 For example, here a plot of my Geller Voltage Reference a few month ago:
 
-.. image:: {filename}/images/hp3456a/geller_2016_02.svg
+.. image:: {static}/images/hp3456a/geller_2016_02.svg
    :alt: 10V
 
 and now:
 
-.. image:: {filename}/images/hp3456a/geller_2016_11.svg
+.. image:: {static}/images/hp3456a/geller_2016_11.svg
    :alt: 10V
 
 

--- a/content/hp34970a.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp34970a.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -14,7 +14,7 @@
 be in working condition, but the main switch unit was almost "given"
 with the plugin modules since it is non functional.
 
-.. image:: {filename}/images/hp34970a/front-view.jpg
+.. image:: {static}/images/hp34970a/front-view.jpg
    :alt: front view of the HP 34970A data acquisition unit
 
 It's in very good shape, the front panel and the push buttons are
@@ -37,18 +37,18 @@
 - the frontpanel and
 - the back plane where plugin modules are connected.
 
-.. image:: {filename}/images/hp34970a/bottom-view.jpg
+.. image:: {static}/images/hp34970a/bottom-view.jpg
    :alt: bottom view of the HP 34970A
 
-.. image:: {filename}/images/hp34970a/top-view.jpg
+.. image:: {static}/images/hp34970a/top-view.jpg
    :alt: top view of the HP 34970A with DMM removed
 
-.. image:: {filename}/images/hp34970a/dmm.jpg
+.. image:: {static}/images/hp34970a/dmm.jpg
    :alt: DMM module of the HP 34970A
 
 The front panel hold the keyboard, the rotary encoder and the diplay system.
 
-.. image:: {filename}/images/hp34970a/front-panel.jpg
+.. image:: {static}/images/hp34970a/front-panel.jpg
    :alt: front panel of the HP 34970A
 
 The front panel is managed by a 80C51 (a 87C51 actually)
@@ -59,7 +59,7 @@
 
 The chips are PLCC44 located under the VFD are the drivers:
 
-.. image:: {filename}/images/hp34970a/front-panel-pcb.jpg
+.. image:: {static}/images/hp34970a/front-panel-pcb.jpg
    :alt: front panel PCB of the HP 34970A
 
 On my unit, the voltage levels for the VFD are fine. I suspected that
@@ -87,7 +87,7 @@
 capacitors (C6, C7, C9 and C10) are a bit too close, so I had to move
 them.
 
-.. image:: {filename}/images/hp34970a/front-panel-sockets.jpg
+.. image:: {static}/images/hp34970a/front-panel-sockets.jpg
    :alt: PLCC sockets for the VFD drivers of the HP 34970A
 
 
@@ -99,13 +99,13 @@
 few seconds. One mst be careful not to burn them, otherwise the VFD is
 definitively lost.
 
-.. image:: {filename}/images/hp34970a/vfd-back.jpg
+.. image:: {static}/images/hp34970a/vfd-back.jpg
    :alt: back side of the VFD (probably dead) module
 
 So I tried such a rejuvenation on my VFD module. I wasn't sure what
 color the filaments must be heated to (between a light orange to an
 almost white yellow). I was doing this using my `Lambda PSU
-<{filename}/LPD422FM.rst>`_ raising the voltage while looking at the
+<{static}/LPD422FM.rst>`_ raising the voltage while looking at the
 filaments.
 
 The results are very disappointing. The VFD is a little bit brighter,

--- a/content/hp34970a_2.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp34970a_2.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -10,7 +10,7 @@
 
 
 This is quick follow up of my `previous blog
-post <{filename}/hp34970a.rst>`_ on my attempt to fix my recently acquired
+post <{static}/hp34970a.rst>`_ on my attempt to fix my recently acquired
 HP 34970A.
 
 In my hurry to replace the failing FRAM (FM24C04) chips, I also
@@ -42,12 +42,12 @@
 
 I ended with this:
 
-.. image:: {filename}/images/hp34970a/soic8_breadboard.jpg
+.. image:: {static}/images/hp34970a/soic8_breadboard.jpg
    :alt: the breadboard-based setup to dump/write the FM24C04 chips.
 
 And with a FM24C04 chip soldered on:
 
-.. image:: {filename}/images/hp34970a/soic8_breadboard_populated.jpg
+.. image:: {static}/images/hp34970a/soic8_breadboard_populated.jpg
    :alt: the breadboard-based setup with a FM24C04 to be dumped.
 
 I've been using a small library named extEEPROM_ dedicated to
@@ -62,7 +62,7 @@
 problem: using a 5v power rail made meable to dump the content of the
 chips.
 
-.. image:: {filename}/images/hp34970a/fm24c04_dump.jpg
+.. image:: {static}/images/hp34970a/fm24c04_dump.jpg
    :alt: dumping the content of a FM24C04
 
 Restoring the dumped content in a new FM24C04

--- a/content/hp34970a_3.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp34970a_3.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -9,7 +9,7 @@
 :series_index: 3
 
 
-As explained in `the previous post in this series <{filename}/hp34970a_2.rst>`_,
+As explained in `the previous post in this series <{static}/hp34970a_2.rst>`_,
 I've started to sniff the serial protocol between the main board and
 the display panel so I can replace the failed VFD by an OLED or TFT
 display managed by an arduino or similar.
@@ -122,17 +122,17 @@
 
 The result is this beautiful clean setup:
 
-.. image:: {filename}/images/hp34970a/poc_display.jpg
+.. image:: {static}/images/hp34970a/poc_display.jpg
    :alt: A very quick proof of concept of an arduino based display replacement for the HP34970A.
 
 
 As you can see, it works: I have the main content od the VFD display
 on my TFT module!
 
-.. image:: {filename}/images/hp34970a/poc_display_mux_off.jpg
+.. image:: {static}/images/hp34970a/poc_display_mux_off.jpg
    :alt: The FTF display showing the main area and the current channel area.
 	 
-.. image:: {filename}/images/hp34970a/poc_display_vdc.jpg
+.. image:: {static}/images/hp34970a/poc_display_vdc.jpg
    :alt: The same with the channel 209 configured as VDC, 6.5digits.
 
 

--- a/content/hp34970a_4.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp34970a_4.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -10,7 +10,7 @@
 
 
 After a summer pause, I'm back on my HP34970A replair project.  In
-`the previous post in this series <{filename}/hp34970a_3.rst>`_, I've
+`the previous post in this series <{static}/hp34970a_3.rst>`_, I've
 started to reverse ingineer the serial protocol between the CPU board
 and the fonrt panel, and implement a prototype of replacement display.
 
@@ -24,7 +24,7 @@
 
 .. _`blue 256x64 OLED display`: http://www.buydisplay.com/default/oled-3-2-inch-displays-module-companies-with-driver-circuit-blue-on-black
 
-.. image:: {filename}/images/hp34970a/oled_module.jpg
+.. image:: {static}/images/hp34970a/oled_module.jpg
    :alt: 3"2 blue OLED module used as a replacement display for the HP34970A.
 
 My first problem was to drive the display from my Nucleo board. I
@@ -71,7 +71,7 @@
 .. _GraphicDisplay: https://developer.mbed.org/teams/GraphicsDisplay/code/UniGraphic/file/tip/Graphics/GraphicsDisplay.h 
 .. _`poorly written sample C code`: http://www.buydisplay.com/download/democode/ER-OLEDM032-1_DemoCode.txt
 
-.. image:: {filename}/images/hp34970a/oled.jpg
+.. image:: {static}/images/hp34970a/oled.jpg
    :alt: The replacement 3"2 blue OLED module for the HP34970A.
 
 
@@ -121,7 +121,7 @@
 I was almost ready to use 2 microcontrollers for the job: one to sniff
 and interpret the serial communication and one to drive the display.
 
-.. image:: {filename}/images/hp34970a/poc_oled.jpg
+.. image:: {static}/images/hp34970a/poc_oled.jpg
    :alt: Improvment of the POC based on the Nucleo F446RE and using a blue OLED module.
 
 Improving the tasks

--- a/content/hp34970a_protocol.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp34970a_protocol.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -25,7 +25,7 @@
 
 - A4 is the (optional) internal 6.5 digits DMM.
 
-.. image:: {filename}/images/hp34970a/block_diagram.svg
+.. image:: {static}/images/hp34970a/block_diagram.svg
    :alt: System Block Diagram of the HP34970A.
 
 
@@ -178,7 +178,7 @@
 ",", ":" and ";"). Punctuation signs are also very close to the
 preceding chracters.
 
-.. image:: {filename}/images/hp34970a/digit.jpg
+.. image:: {static}/images/hp34970a/digit.jpg
    :alt: 17-segments digit of the main display.
 
 The command used to send text to the main display is ``0x00``. The
@@ -195,7 +195,7 @@
 This area only allows to display 3 7-segments digits. The command is
 ``0x0C``, the payload is thus 3 bytes long.
 
-.. image:: {filename}/images/hp34970a/channel.jpg
+.. image:: {static}/images/hp34970a/channel.jpg
    :alt: The display area dedicated to current channel.
    :align: center
 

--- a/content/hp3562a.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp3562a.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -28,7 +28,7 @@
 
 Here is the beast:
 
-.. image:: {filename}images/hp3562a/front.jpg
+.. image:: {static}images/hp3562a/front.jpg
 
 I said the beast, because despite being an amazing piece of test
 equipment, it's also very big (576mm x 426mm x 222mm), very heavy
@@ -46,7 +46,7 @@
 occasion to investigate and fix the only real problem I have (as far
 as I know) with my device: the dimm display.
 
-.. image:: {filename}images/hp3562a/front_open.jpg
+.. image:: {static}images/hp3562a/front_open.jpg
 
 The unit consist in mostly 4 parts:
 
@@ -63,7 +63,7 @@
   
 The general block diagram:
 
-.. image:: {filename}images/hp3562a/hp3562a_block_diagram_new.png
+.. image:: {static}images/hp3562a/hp3562a_block_diagram_new.png
    :alt: General block diagram of the HP3562A
 
 The instrument is built around 2 buses:
@@ -83,26 +83,26 @@
 For the record, the block diagram from Service Manual 03562-90219
 looks like:
 
-.. image:: {filename}images/hp3562a/block_diagram.png
+.. image:: {static}images/hp3562a/block_diagram.png
    :alt: General block diagram of the HP3562A from earliest Service Manual
 
 	 
 Power Supply
 ============
 
-.. image:: {filename}images/hp3562a/hp3562a_a18_psu_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a18_psu_block_diagram.png
    :alt: Block diagram of the switching power supply unit
 
 
-.. image:: {filename}images/hp3562a/a18_psu.jpg
+.. image:: {static}images/hp3562a/a18_psu.jpg
 
 The primary capacitors are huge Sprague caps (1400µF 250V):
 
-.. image:: {filename}images/hp3562a/caps.jpg
+.. image:: {static}images/hp3562a/caps.jpg
 
 The power line filter is also pretty impressive:
 
-.. image:: {filename}images/hp3562a/filter.jpg
+.. image:: {static}images/hp3562a/filter.jpg
 
 The PSU generates:
 
@@ -124,5 +124,5 @@
 Next
 ====
 
-In the `next part <{filename}hp3562a_2.rst>`_, we will describe the
+In the `next part <{static}hp3562a_2.rst>`_, we will describe the
 Digital Section of the instrument.

--- a/content/hp3562a_2.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp3562a_2.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -9,7 +9,7 @@
 :series_index: 2
 
 This is the part 2 of the series about my
-`HP 3562A Digital Signal Analyzer <{filename}hp3562a.rst>`_,
+`HP 3562A Digital Signal Analyzer <{static}hp3562a.rst>`_,
 quickly describing the Digital Section of the instrument.
 
 
@@ -19,7 +19,7 @@
 The unit is quite capable, since the main CPU is a 68000 (not exactly
 of small CPU for the time).
 
-.. image:: {filename}images/hp3562a/cpu.jpg
+.. image:: {static}images/hp3562a/cpu.jpg
 
 The 8 boards are:
 
@@ -44,18 +44,18 @@
           the Digital Source section, so I do not have details on the
           Timing Control section.
 
-.. image:: {filename}images/hp3562a/hp3562a_a1_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a1_block_diagram.png
    :alt: Block diagram of the A1 Digital Source Board
 
 This board is mainly responsible for generating the digital signals
 that are used as input for the source DAC. It generates all sort of
 noise figures, bursts, sweeps, and so on.
 
-.. image:: {filename}images/hp3562a/a1_digital_source.jpg
+.. image:: {static}images/hp3562a/a1_digital_source.jpg
 
 The Timing Control section looks like:
 
-.. image:: {filename}images/hp3562a/hp3562a_a1_timing_control_circuit.png
+.. image:: {static}images/hp3562a/hp3562a_a1_timing_control_circuit.png
    :alt: A1 Timing Control block diagram
 
 The Phase Resolution is used in external and internal triggered
@@ -65,7 +65,7 @@
 This phase resolution circuit counts the time between the samples and
 a trigger.
 
-.. image:: {filename}images/hp3562a/hp3562a_a1_phase_resolution_circuit.png
+.. image:: {static}images/hp3562a/hp3562a_a1_phase_resolution_circuit.png
    :alt: A1 Phase Resolution block diagram
 
 The Burst Control circuit controls the burst length and generates the
@@ -73,7 +73,7 @@
 signal that gates the analog source on and off during the burst and
 chirp modes.
 
-.. image:: {filename}images/hp3562a/hp3562a_a1_burst_control_circuit.png
+.. image:: {static}images/hp3562a/hp3562a_a1_burst_control_circuit.png
    :alt: A1 Burst Control block diagram
 
 
@@ -91,11 +91,11 @@
 which process to execute and monitor the overall functionning and data
 processing of the instrument.
 
-.. image:: {filename}images/hp3562a/hp3562a_a2_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a2_block_diagram.png
 
 The main CPU board, with the beautiful MC68000P9 DIP64 package:
 
-.. image:: {filename}images/hp3562a/a2_cpu.jpg
+.. image:: {static}images/hp3562a/a2_cpu.jpg
 
 It comes with 2 populated M5M256BP static ram chips (32k x 8bits), for
 the CPU, but seems to be capable of holding 4 more of them. The CPU
@@ -115,13 +115,13 @@
 Memory
 ------
 
-.. image:: {filename}images/hp3562a/a38_memory.jpg
+.. image:: {static}images/hp3562a/a38_memory.jpg
 
 This board is described as an "extension of the read only memory of
 the system CPU board" and read/write memory used by most of the other
 assemblies.
 
-.. image:: {filename}images/hp3562a/hp3562a_a38_memory_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a38_memory_block_diagram.png
 
 The ROM section stores most programs for the HP 3562A except the
 startup routines (which are on the ROM ships of the A2 CPU
@@ -130,7 +130,7 @@
 The board allows flexibility in the number and type of ROM chipes
 used. ROM density is selected by placement of jumpers.
 
-.. image:: {filename}images/hp3562a/hp3562a_a38_rom_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a38_rom_block_diagram.png
 
 
 The RAM section of the assembly consist of 4 32k by 8 bits static RAM
@@ -138,7 +138,7 @@
 to the global RAM from six devices (FFT, both Digital Filters,
 Display, FPP and the system CPU).
 	   
-.. image:: {filename}images/hp3562a/hp3562a_a38_ram_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a38_ram_block_diagram.png
 
 The Display Controller section also lies on this A38 board.
 	   
@@ -154,9 +154,9 @@
 (synchronized with the sample rate). The sinusoidal signal is
 generated from a table of values stored in the ROM.
 
-.. image:: {filename}images/hp3562a/hp3562a_a4_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a4_block_diagram.png
 
-.. image:: {filename}images/hp3562a/a4_loc.jpg
+.. image:: {static}images/hp3562a/a4_loc.jpg
 
 
 
@@ -170,7 +170,7 @@
 digital filtering or zoom (a combination of frequency shifting and
 filtering). The processed data is transferred on the global data bus.
 
-.. figure:: {filename}images/hp3562a/a5_a6_block_diagram.png
+.. figure:: {static}images/hp3562a/a5_a6_block_diagram.png
    :alt: Digital Filter Assembly block diagram
 
    Digital Filter Assembly block diagram.
@@ -178,19 +178,19 @@
 **Digital Filter:** Each digital filter consists of a control IC and 2
 filter ICs, one for the real data and one for the imaginary data.
    
-.. figure:: {filename}images/hp3562a/a6_zoom.png
+.. figure:: {static}images/hp3562a/a6_zoom.png
    :alt: Digital Filter for the zoom mode
 
    The Digital Filters are fed with a kind of LF I/Q demodulator, used
    for zooming or actual digital filtering.
 
 
-.. figure:: {filename}images/hp3562a/a5_filter.jpg
+.. figure:: {static}images/hp3562a/a5_filter.jpg
    :alt: Picture of the A5 Digital Filter board
 
    Picture of the A5 Digital Filter board.
 
-.. figure:: {filename}images/hp3562a/hp3562a_a5_block_diagram.png
+.. figure:: {static}images/hp3562a/hp3562a_a5_block_diagram.png
    :alt: Digital Filter block diagram
 
    The A5 Digital Filter board block diagram.
@@ -204,12 +204,12 @@
 data.
 
    
-.. figure:: {filename}images/hp3562a/a6_control.jpg
+.. figure:: {static}images/hp3562a/a6_control.jpg
    :alt: Picture of the A6 Digital Filter Control board
 
    Picture of the A6 Digital Filter Control board.
 
-.. figure:: {filename}images/hp3562a/a6_block_diagram.png
+.. figure:: {static}images/hp3562a/a6_block_diagram.png
    :alt: Digital Filter Controller block diagram
 
    The A6 Digital Filter Controller board block diagram.
@@ -225,13 +225,13 @@
 controller. Instructions are provided to the ALUs by an address
 sequencer and seven microcode PROMs.
 
-.. figure:: {filename}images/hp3562a/hp3562a_a7_block_diagram.png
+.. figure:: {static}images/hp3562a/hp3562a_a7_block_diagram.png
    :alt: Floating Point Processor block diagram
    :align: center
 	   
    Floating Point Processor block diagram.
       
-.. figure:: {filename}images/hp3562a/a7_fpp.jpg
+.. figure:: {static}images/hp3562a/a7_fpp.jpg
    :alt: Picture of the A7 FPP board 
    :align: center
 
@@ -244,23 +244,23 @@
 FFT
 ---
 
-.. image:: {filename}images/hp3562a/hp3562a_a9_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a9_block_diagram.png
 
 The FFT board performs windowing, FFT and Inverse FFT directly from
 and to the RAM.
 It's built around a TMS230 microprocessor runningat 5MHz
 
-.. image:: {filename}images/hp3562a/a9_fft.jpg
+.. image:: {static}images/hp3562a/a9_fft.jpg
 
 
 Keyboard
 --------
 
-.. image:: {filename}images/hp3562a/hp3562a_a15_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a15_block_diagram.png
 
 
 Next
 ====
 
-In the `next part <{filename}hp3562a_3.rst>`_, we will describe the
+In the `next part <{static}hp3562a_3.rst>`_, we will describe the
 Analog Section of the instrument.

--- a/content/hp3562a_3.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp3562a_3.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -9,7 +9,7 @@
 :series_index: 3
 
 This is the part 3 of the series about my
-`HP 3562A Digital Signal Analyzer <{filename}hp3562a.rst>`_,
+`HP 3562A Digital Signal Analyzer <{static}hp3562a.rst>`_,
 quickly describing the Analog Section of the instrument.
 
 
@@ -26,7 +26,7 @@
 Analog Source
 -------------
 
-.. image:: {filename}images/hp3562a/hp3562a_a30_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a30_block_diagram.png
 
 This board is mainly a DAC converting signal signal from the Digital
 Source board (for sin waves). It also generates Pseudo Random Noise
@@ -37,9 +37,9 @@
 this is implemented is quite interesting: the analog signal from the
 main DAC is used a reference voltage for a multiplying DAC.
 
-.. image:: {filename}images/hp3562a/a30_analog_source.jpg
+.. image:: {static}images/hp3562a/a30_analog_source.jpg
 
-.. image:: {filename}images/hp3562a/a30_analog_source_dac.jpg
+.. image:: {static}images/hp3562a/a30_analog_source_dac.jpg
 
 Trigger
 -------
@@ -49,7 +49,7 @@
 possible trigger sources: external, channel 1, channel 2 and the
 calibration.
 
-.. image:: {filename}images/hp3562a/trigger_level.png
+.. image:: {static}images/hp3562a/trigger_level.png
 
 The trigger clock circuit produces the 20.48MHz clock using a
 VCXO. From this signal are derived the 10.24MHz clock used by many
@@ -59,15 +59,15 @@
 When an external clock is provided, a PLL is used to lock this
 20.48MHz. The external signal can be 1, 2, 5 or the standard 10MHz.
 
-.. image:: {filename}images/hp3562a/trigger_clock.png
+.. image:: {static}images/hp3562a/trigger_clock.png
 
-.. image:: {filename}images/hp3562a/a31_trigger.jpg
+.. image:: {static}images/hp3562a/a31_trigger.jpg
 
 
 Input ADC
 ---------
 
-.. image:: {filename}images/hp3562a/hp3562a_a32_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a32_block_diagram.png
 
 
 The ADC board converts analog data from the input board into 13-bits
@@ -78,14 +78,14 @@
 from the input (hold) signal and the result is multiplied then
 digitized a second time to produce the remaining 5-bits of resolution.
 
-.. image:: {filename}images/hp3562a/a32_input_adc.jpg
-.. image:: {filename}images/hp3562a/a32_input_adc_bb.jpg
+.. image:: {static}images/hp3562a/a32_input_adc.jpg
+.. image:: {static}images/hp3562a/a32_input_adc_bb.jpg
 
 
 Input
 -----
 
-.. image:: {filename}images/hp3562a/hp3562a_a33_block_diagram.png
+.. image:: {static}images/hp3562a/hp3562a_a33_block_diagram.png
 
 The input assembly implements the voltage ranges and conditions the
 input signal. It mostly consist in a pair switch attenuators (the
@@ -93,11 +93,11 @@
 conditionners. The balanced signal is then fed into a differential
 amplifier followed by a amplifier and an attenuator.
 
-.. image:: {filename}images/hp3562a/a33_input.jpg
+.. image:: {static}images/hp3562a/a33_input.jpg
 
 
 Next
 ====
 
-In the `next part <{filename}hp3562a_4.rst>`_, we will describe the
+In the `next part <{static}hp3562a_4.rst>`_, we will describe the
 HP 1345A Digital Display used in the instrument.

--- a/content/hp3562a_4.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp3562a_4.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -9,7 +9,7 @@
 :series_index: 4
 
 This is the part 4 of the series about my
-`HP 3562A Digital Signal Analyzer <{filename}hp3562a.rst>`_,
+`HP 3562A Digital Signal Analyzer <{static}hp3562a.rst>`_,
 quickly describing the HP 1345A Digital Display unit as well as
 the repair I had to do on it.
 	       
@@ -21,7 +21,7 @@
 (wich adds a 4K x 16 bits Vector Memory), so it must driven by a
 dedicated display controller (which is on the A38 memory board):
 
-.. image:: {filename}images/hp3562a/a8_a17_display.png
+.. image:: {static}images/hp3562a/a8_a17_display.png
 
 The unit is a 6 inch monochrome display producing true vector graphics
 with a resolution of 2048x2018 points. It can display up to 3226
@@ -30,7 +30,7 @@
 It's a true vector display; vectors are drawn by moving the CRT beam
 on the screen (it's not a pixel based display).
 
-.. image:: {filename}images/hp3562a/hp1345a_raster_vector.png
+.. image:: {static}images/hp3562a/hp1345a_raster_vector.png
 
 It can diplay:
 
@@ -50,21 +50,21 @@
 
 Allowing more brightness control of the vectors.
 
-.. image:: {filename}images/hp3562a/hp1345a.jpg
+.. image:: {static}images/hp3562a/hp1345a.jpg
 
 
 If not connected with a controller, it shows a test pattern for
 adjustments.
 
-.. image:: {filename}images/hp3562a/hp1345a_test_pattern.png
+.. image:: {static}images/hp3562a/hp1345a_test_pattern.png
 
 The unit looks like:
 
-.. image:: {filename}images/hp3562a/hp1345a_side.jpg
+.. image:: {static}images/hp3562a/hp1345a_side.jpg
 
-.. image:: {filename}images/hp3562a/hp1345a_side2.jpg
+.. image:: {static}images/hp3562a/hp1345a_side2.jpg
 
-.. image:: {filename}images/hp3562a/hp1345a_top.jpg
+.. image:: {static}images/hp3562a/hp1345a_top.jpg
 
 
 Adjustment and repair
@@ -88,7 +88,7 @@
 identifing the real culprits, since the only solution to check them is
 to desolder (at least one end): A1C45 and A1C48.
 
-.. image:: {filename}images/hp3562a/hp1345a_dead_caps.jpg
+.. image:: {static}images/hp3562a/hp1345a_dead_caps.jpg
 
 
 These 2 small (tantalum) caps near U3 were short. Not sure why they
@@ -110,17 +110,17 @@
 Brief description
 -----------------
 
-.. image:: {filename}images/hp3562a/hp1345a_block_diagram.png
+.. image:: {static}images/hp3562a/hp1345a_block_diagram.png
 
-.. image:: {filename}images/hp3562a/hp1345a_stroke_generator.png
+.. image:: {static}images/hp3562a/hp1345a_stroke_generator.png
 
 
-.. image:: {filename}images/hp3562a/hp1345a_ramp_generator.png
+.. image:: {static}images/hp3562a/hp1345a_ramp_generator.png
 
 
-.. image:: {filename}images/hp3562a/hp1345a_vector_processor.png
+.. image:: {static}images/hp3562a/hp1345a_vector_processor.png
 
-.. image:: {filename}images/hp3562a/hp1345a_vpc_architecture.png
+.. image:: {static}images/hp3562a/hp1345a_vpc_architecture.png
 
 	   
 

--- a/content/hp5334a.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp5334a.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -12,12 +12,12 @@
 optinal DVM, and an optional oven controlled
 oscillator. Unfortunately, my meter has no option at all.
 
-.. image:: {filename}images/hp5334a/front.jpg
+.. image:: {static}images/hp5334a/front.jpg
    :alt: My HP5334A Universal Counter
       
 There is a nice quick instruction set printed on the top cover:
 
-.. image:: {filename}images/hp5334a/top.jpg
+.. image:: {static}images/hp5334a/top.jpg
    :alt: HP5334A Quick Instruction Set
 
 
@@ -32,20 +32,20 @@
 
 When removing the covers, one can see:
 
-.. image:: {filename}/images/hp5334a/pcb.jpg
+.. image:: {static}/images/hp5334a/pcb.jpg
    :alt: The top view of the PCB.
 	   
 with a very nice star-shaped ground lattice. Among other interesting
 things are these funny little variable caps:
 
-.. image:: {filename}/images/hp5334a/c89.jpg
+.. image:: {static}/images/hp5334a/c89.jpg
    :alt: C89, a nice little variable cap.
 
 And as one may expect in such a device, no fan.
 	 
 The bottom side of the PCB looks like:
 	 
-.. image:: {filename}/images/hp5334a/pcb_bottom.jpg
+.. image:: {static}/images/hp5334a/pcb_bottom.jpg
    :alt: The bottom view of the PCB.
 	 
 Adjustment
@@ -60,7 +60,7 @@
 
 And it was not so out of specs:
 
-.. image:: {filename}/images/hp5334a/uncal.jpg
+.. image:: {static}/images/hp5334a/uncal.jpg
    :alt: Measuring a 1kHz reference
 
 In this picture, the signal is a 1kHz sine wave generated by a
@@ -79,7 +79,7 @@
 delay has been set to 1s, as described in the service manual when
 adjusting the oscillator):
 
-.. image:: {filename}/images/hp5334a/cal.jpg
+.. image:: {static}/images/hp5334a/cal.jpg
    :alt: After adjustement against the rubidium reference standard.
 
 The adjustment capacitor is not fine enough to reach a spot 10MHz
@@ -91,5 +91,5 @@
 off, something like 0.05 ppm).
 
 
-.. _`Efratom 10MHz reference standard`: {filename}/10MHz_ref.rst
-.. _HP8904A: {filename}/hp8904a.rst
+.. _`Efratom 10MHz reference standard`: {static}/10MHz_ref.rst
+.. _HP8904A: {static}/hp8904a.rst

--- a/content/hp8662a.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp8662a.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -14,7 +14,7 @@
 cheap enough, more, what the fun in buying properly working test equipment?)
 
 I wanted to make a break in my current other repair project, the `EIP 545B
-Microwave Fequency Meter <{filename}eip545b.rst>`_, also having a properly
+Microwave Fequency Meter <{static}eip545b.rst>`_, also having a properly
 working unit such as this incredible signal synthetizer would be quite useful
 to perform several adjustement tasks on the EIP 545B.
 
@@ -42,7 +42,7 @@
 before even attempting to fix the PSU.
 
 
-.. image:: {filename}images/hp8662a/dirty_hp.jpg
+.. image:: {static}/images/hp8662a/dirty_hp.jpg
    :class: image-process-large-photo
 
 
@@ -52,18 +52,18 @@
 soldered point to point, which makes disassembling the case, motherboards and
 so very tedious.
 
-.. image:: {filename}images/hp8662a/top_before_2.jpg
+.. image:: {static}/images/hp8662a/top_before_2.jpg
    :class: image-process-large-photo
 
-.. image:: {filename}images/hp8662a/bottom_before.jpg
+.. image:: {static}/images/hp8662a/bottom_before.jpg
    :class: image-process-large-photo
 
-.. image:: {filename}images/hp8662a/front_after.jpg
+.. image:: {static}/images/hp8662a/front_after.jpg
    :class: image-process-large-photo
 
 Also, there are hundreds of screws in this unit! it's insane.
 
-.. image:: {filename}images/hp8662a/top_after.jpg
+.. image:: {static}/images/hp8662a/top_after.jpg
    :class: image-process-large-photo
 
 Whatever, I finally got to a point I could clean most of the parts of the unit,
@@ -71,14 +71,14 @@
 while the disassembling, so it took me some effort to have something that looks
 like an HP 8662A...
 
-.. image:: {filename}images/hp8662a/reassembling_2.jpg
+.. image:: {static}/images/hp8662a/reassembling_2.jpg
    :class: image-process-large-photo
 
 Once I had the structure of the generator back togother, with the back plane in
 place but no other board nor module plugged in, I started to take care of the
 PSU.
 
-.. image:: {filename}images/hp8662a/reassembling_1.jpg
+.. image:: {static}/images/hp8662a/reassembling_1.jpg
    :class: image-process-large-photo
 
 The PSU
@@ -94,7 +94,7 @@
 - The main switching power supply. The high voltage section is allways on, and
   the mani switch on the front panel only activate the switching.
 
-.. image:: {filename}images/hp8662a/PSU_simplified_schematic.jpeg
+.. image:: {static}/images/hp8662a/PSU_simplified_schematic.jpeg
    :class: image-process-large-photo
 
 The 4 boards the PSU is made of are:
@@ -114,7 +114,7 @@
 - a daughter board (A7A2) with the switching control circuit. The switching
   regulation being made on the 5.2V rail, which is not regulated by A7A1.
 
-.. image:: {filename}images/hp8662a/PSU_block_diagram.jpeg
+.. image:: {static}/images/hp8662a/PSU_block_diagram.jpeg
    :class: image-process-large-photo
 
 So I gave a close look at thes boards, beginning by the main board, the I found
@@ -126,7 +126,7 @@
 junk parts; only a slighty highter value one (a XXX, which is more like
 20Ω @25°C). Not ideal, but for now, it seems to work fine.
 
-.. image:: {filename}images/hp8662a/smoking_thermistor.jpg
+.. image:: {static}/images/hp8662a/smoking_thermistor.jpg
    :class: image-process-large-photo
 
 After this first step forward, I was not confident enought to plug the boards
@@ -147,7 +147,7 @@
 did not stay on, and the error LED did turn on. All the voltages produced by
 the inverter board were very low. Somethin was wrong.
 
-.. image:: {filename}images/hp8662a/PSU_inverter_schematic.jpeg
+.. image:: {static}/images/hp8662a/PSU_inverter_schematic.jpeg
    :class: image-process-large-photo
 
 Looking at the schematics and the boards, I did find several failure points:
@@ -161,10 +161,10 @@
   more parts than I really need, when these are cheap, just in case; seems to
   be a good idea),
 
-  .. image:: {filename}images/hp8662a/broken_choke.jpg
+  .. image:: {static}/images/hp8662a/broken_choke.jpg
      :class: image-process-large-photo
 
-  .. image:: {filename}images/hp8662a/replacement_choke.jpg
+  .. image:: {static}/images/hp8662a/replacement_choke.jpg
      :class: image-process-large-photo
 
 - there are 2 small 400mA fuses on the inverter board to protect the base of
@@ -176,7 +176,7 @@
   each. So for now, I've replaced it with a simple 5x20 glass fuse: not as
   skookum but does the job for a few cents.
 
-  .. image:: {filename}images/hp8662a/fuse_replacement.jpeg
+  .. image:: {static}/images/hp8662a/fuse_replacement.jpeg
      :class: image-process-large-photo
 
 

--- a/content/hp8662a_2.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp8662a_2.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -14,7 +14,7 @@
 - a few sloppy keys on the keypad,
 - the know did not work at all,
 - and more importantly, some very unpleasant spectrums at some frequencies
-  (covered in `part 3 <{filename}hp8662a_3.rst>`_),
+  (covered in `part 3 <{static}hp8662a_3.rst>`_),
 - some output level accuracy problems.
 
 
@@ -26,7 +26,7 @@
 
 No surprise: these keys were missing their famous (well, for some at least) spring:
 
-.. image:: {filename}images/hp8662a/key_missing_springs.jpg
+.. image:: {static}images/hp8662a/key_missing_springs.jpg
    :class: image-process-large-photo
 
 As you can (not) see, the "Status" key as well as the "Increment Set" key have
@@ -49,10 +49,10 @@
 widths), and I found one that seems to work just fine, and the feeling is about
 the same as original keys:
 
-.. image:: {filename}images/hp8662a/key_hack.jpeg
+.. image:: {static}images/hp8662a/key_hack.jpeg
    :class: image-process-large-photo
 
-.. image:: {filename}images/hp8662a/key_hack_anim.gif
+.. image:: {static}images/hp8662a/key_hack_anim.gif
 
 I cleaned all keys using some deoxit contact cleaner which also lubricated
 those noisy springs making the keys nice ans smooth again.
@@ -70,5 +70,5 @@
 now working ok (not perfectly, there are some missed steps: there are two small
 screws that look like adjustment screws, but I'm not sure how to tune them).
 
-.. image:: {filename}images/hp8662a/encoder.jpeg
+.. image:: {static}images/hp8662a/encoder.jpeg
    :class: image-process-large-photo

--- a/content/hp8662a_3.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp8662a_3.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -11,7 +11,7 @@
 
 This is the part 3 on my series about my HP 8662A Signal Generator, and is
 about the third main problems I found with this unit, as evocated in `part
-2 <{filename}hp8662a_2.rst>`_: Error 04 is lit and there are some very
+2 <{static}hp8662a_2.rst>`_: Error 04 is lit and there are some very
 unpleasant spectrums at some frequencies.
 
 
@@ -24,7 +24,7 @@
 procedure to follow in on the Service Sheet H. The general block diagram of
 this section is as follow:
 
-.. image:: {filename}images/hp8662a/LF_block_diagram.png
+.. image:: {static}images/hp8662a/LF_block_diagram.png
    :class: image-process-large-photo
 
 This Low Frequency Section consists in no less than 4 phase locked loops in
@@ -53,7 +53,7 @@
 
 Here is a more detailed vue of the block diagram of the low frequency section:
 
-.. image:: {filename}images/hp8662a/sheet_H.png
+.. image:: {static}images/hp8662a/sheet_H.png
    :class: image-process-large-photo
 
 
@@ -107,7 +107,7 @@
 their ideal values (the error is inversed to make the plot easier to read; most
 of the time, I am below the expected value):
 
-.. plotly:: {filename}/json/hp8662a_vco_sl.json
+.. plotly:: {static}/json/hp8662a_vco_sl.json
    :width: 800
    :height: 600
 
@@ -130,26 +130,26 @@
 
 For example, at 100.3MHz, we have a decent signal:
 
-.. image:: {filename}/images/hp8662a/working_not_quite_3.jpg
+.. image:: {static}/images/hp8662a/working_not_quite_3.jpg
    :class: image-process-large-photo
 
-.. image:: {filename}/images/hp8662a/working_not_quite_3_sa.jpg
+.. image:: {static}/images/hp8662a/working_not_quite_3_sa.jpg
    :class: image-process-large-photo
 
 but at 101.0Mhz, it begins to looks pretty messy:
 
-.. image:: {filename}/images/hp8662a/working_not_quite_2.jpg
+.. image:: {static}/images/hp8662a/working_not_quite_2.jpg
    :class: image-process-large-photo
 
-.. image:: {filename}/images/hp8662a/working_not_quite_2_sa.jpg
+.. image:: {static}/images/hp8662a/working_not_quite_2_sa.jpg
    :class: image-process-large-photo
 
 and 101.9Mhz shows "nice" side bands:
 
-.. image:: {filename}/images/hp8662a/working_not_quite.jpg
+.. image:: {static}/images/hp8662a/working_not_quite.jpg
    :class: image-process-large-photo
 
-.. image:: {filename}/images/hp8662a/working_not_quite_sa.jpg
+.. image:: {static}/images/hp8662a/working_not_quite_sa.jpg
    :class: image-process-large-photo
 
 The problem seems quite clear: some PLL cannot lock at specific frequencies,
@@ -176,5 +176,5 @@
 
 For example, a 101MHz signal which was very unstable before now looks like:
 
-.. image:: {filename}/images/hp8662a/working_101.jpg
+.. image:: {static}/images/hp8662a/working_101.jpg
    :class: image-process-large-photo

--- a/content/hp8904a.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp8904a.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -16,7 +16,7 @@
 generating a non-symmetric signal when output level was set above 5V
 or something like that.
 
-.. image:: {filename}images/hp8904a/twin_HP8904A.jpg
+.. image:: {static}images/hp8904a/twin_HP8904A.jpg
    :alt: My 2 HP8904A synthetizers.
 
 I knew for a fact that the PSU was the problem (thanks to the fact I
@@ -32,7 +32,7 @@
 The PSU Problem
 ===============
 
-.. image:: {filename}images/hp8904a/hp8904a_top.jpg
+.. image:: {static}images/hp8904a/hp8904a_top.jpg
    :alt: Top view of the HP8904A
 	   
 The PSU board is the one at the rear of the unit, on the upper part of
@@ -73,7 +73,7 @@
 sink and split these two boards apart, since it's not easy to deal
 with this:
 
-.. image:: {filename}images/hp8904a/hp8904_psu_followme.jpg
+.. image:: {static}images/hp8904a/hp8904_psu_followme.jpg
    :alt: part of the +16.3V PSU rail
             
 So I removed the heatsink and disassembled this small board from the
@@ -81,7 +81,7 @@
 station. Disassembling the 3x 8 pins angle connectors from the double
 sided PCB was not a piece of cake...)
 
-.. image:: {filename}images/hp8904a/HP8904A_daughter_board.jpg
+.. image:: {static}images/hp8904a/HP8904A_daughter_board.jpg
    :alt: the small daughter board of the PSU
 
 After that, I noticed a possible leak of a small cap, but this was on
@@ -98,7 +98,7 @@
 
 The part of the schematic involved in the +16.3V rail is the following:
 
-.. image:: {filename}images/hp8904a/psu_schematic.png
+.. image:: {static}images/hp8904a/psu_schematic.png
    :alt: part of the schemtic of the PSU
 
 At first glance (the schematic was then a bunch of poorly made
@@ -170,7 +170,7 @@
 manual of the HP8904.
 
 And in case of failed battery, the memory can be restored following
-`this document <{filename}pdfs/HP_8904A_Service_Notes_2.pdf>`_
+`this document <{static}pdfs/HP_8904A_Service_Notes_2.pdf>`_
 
 .. _`thread pointing to an HP service document`: http://www.eevblog.com/forum/testgear/hp-8904a-options/
 

--- a/content/hp8904a_2.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/hp8904a_2.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -16,18 +16,18 @@
 
 The board I have is the second revision:
 
-.. image:: {filename}images/hp8904a/A2_top.jpg
+.. image:: {static}images/hp8904a/A2_top.jpg
    :alt: The logic board (A2) of the HP8904A signal generator.
 
 And the bottom side of the PCB:
 
-.. image:: {filename}images/hp8904a/A2_bottom.jpg
+.. image:: {static}images/hp8904a/A2_bottom.jpg
    :alt: Bottom side of the A2 board.
 
 According to the presence of soldering flux, it looks like the U46
 chip (a 74ALS73CN) on this board has been replaced:
 	 
-.. image:: {filename}images/hp8904a/A2_U46.jpg
+.. image:: {static}images/hp8904a/A2_U46.jpg
    :alt: The U46 chip seems to have been replaced.
 
 After having moved my scope probe around the 10MHz output (J102), I've
@@ -43,7 +43,7 @@
 this puppy. It presents itself as a Motorola with weird reference
 ``3 0659``:
 
-.. image:: {filename}images/hp8904a/HP8904A_Q106.jpg
+.. image:: {static}images/hp8904a/HP8904A_Q106.jpg
    :alt: The failing transistor.
       
 Having no luck searching the net, I've asked the `wonderful EEVBlog
@@ -62,7 +62,7 @@
 
 This EEVBlog community really is awesome!
 
-.. _`fixed the PSU of one of my HP8904A`: {filename}/hp8904a.rst
+.. _`fixed the PSU of one of my HP8904A`: {static}/hp8904a.rst
 .. _`wonderful EEVBlog community`: http://www.eevblog.com/forum/repair/repair-of-an-hp8904a-signal-generator
 
 

--- a/content/prologix.rst	Wed Oct 16 21:52:38 2019 +0200
+++ b/content/prologix.rst	Wed Oct 16 21:53:47 2019 +0200
@@ -16,7 +16,7 @@
 microcontroller and a FTDI FT245FL chip for the USB<->RS232
 convertion.
 
-.. image:: {filename}images/prologix/prologix_4.2_small.jpg
+.. image:: {static}images/prologix/prologix_4.2_small.jpg
    :alt: The Prologix GPIB-USB controller.
 
 Unfortunately, it's no longer available (I find this unfortunate