--- a/content/hp34970a_3.rst	Thu Nov 05 22:14:33 2020 +0100
+++ b/content/hp34970a_3.rst	Thu Nov 05 22:15:16 2020 +0100
@@ -9,7 +9,7 @@
 :series_index: 3
 
 
-As explained in `the previous post in this series <{static}/hp34970a_2.rst>`_,
+As explained in `the previous post in this series <{filename}/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.
@@ -71,7 +71,7 @@
 
 Indicator flags
 ---------------
-  
+
 The indicator flags are always sent as 4 bytes, each bit controlling
 one indicator.
 
@@ -81,7 +81,7 @@
 Let's say the frame is: ``<0x0A> <0x04> <F1> <F2> <F3> <F4>``, then:
 
 
-- F1.8 = 
+- F1.8 =
 - F1.7 = HI
 - F1.6 = Alarm
 - F1.5 = LO
@@ -89,27 +89,27 @@
 - F1.3 = Channels box
 - F1.2 = Mx+B enabled
 - F1.1 = Alarm enabled (or the alarm frame)
-  
+
 - F2.5 = 4W
 - F2.4 = Alarm 1 ?
 - F2.3 = Alarm 3
-- F2.2 = Alarm 4  
+- F2.2 = Alarm 4
 - F2.1 = Alarm 2
 
 - F3.6 =
 - F3.5 =
-  
-- F4.8 = 
+
+- F4.8 =
 - F4.7 = CONFIG (not sure)
 - F4.6 =
 - F4.5 = MON
 - F4.4 = VIEW
 - F4.3 =
 - F4.2 =
-- F4.1 = 
+- F4.1 =
 
-  
-  
+
+
 Quick prototype
 ===============
 
@@ -131,7 +131,7 @@
 
 .. image:: {static}/images/hp34970a/poc_display_mux_off.jpg
    :alt: The FTF display showing the main area and the current channel area.
-	 
+
 .. image:: {static}/images/hp34970a/poc_display_vdc.jpg
    :alt: The same with the channel 209 configured as VDC, 6.5digits.
 
@@ -144,6 +144,6 @@
 quite surprised since the baudrate is above the maximum officially
 supported one (115200).
 
-I'll release the code of the prototype any time soon. 
-	 
+I'll release the code of the prototype any time soon.
+
 .. _SoftwareSerial: https://www.arduino.cc/en/Reference/SoftwareSerial