content/eip545b.rst

Wed, 13 Mar 2024 11:03:13 +0100

author
David Douard <david.douard@sdf3.org>
date
Wed, 13 Mar 2024 11:03:13 +0100
changeset 152
96ebc76edfaf
parent 115
6b6e13653348
permissions
-rw-r--r--

Update URLs for pcb & firmware to sourcehut

73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
1 ===============================
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
2 EIP 545B RF Frequency Counter
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
3 ===============================
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
4
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
5 :author: David Douard
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
6 :Category: Electronics
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
7 :Tags: test equipment, RF, EIP, 545B, counter
74
70f45e3ac6d0 [eip545b] part 2
David Douard <david.douard@logilab.fr>
parents: 73
diff changeset
8 :series: EIP545B Frequency Counter
70f45e3ac6d0 [eip545b] part 2
David Douard <david.douard@logilab.fr>
parents: 73
diff changeset
9 :series_index: 1
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
10
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
11
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
12 I recently purchased a broken EIP 545B microwave frequency counter on ebay. It
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
13 was very inexpensive (around 150€ delivered), but obviously, non working.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
14
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
15 .. image:: {static}/images/eip545b/closed_unit.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
16 :alt: The EIP 545B RF Counter
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
17
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
18 The device was described as "does not power up", an is clearly not in very good
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
19 condition. Quite dirty, battered, with the band 2 BNC connector ruined.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
20
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
21 But inside, it was **very** dusty and a bit rusty:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
22
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
23 .. image:: {static}/images/eip545b/inside.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
24 :alt: Once opened, it's very dusty
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
25
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
26 The YIG filter looking not so good:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
27
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
28 .. image:: {static}/images/eip545b/rusty_yig.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
29 :alt: The rusty YIG filter
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
30
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
31
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
32 I quickly checked, and indeed, nothing happened when I tried to power it up. In
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
33 fact, the fuse was blown. So, instead of just give a try with a new fuse, I
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
34 decided to disassemble it completely to clean it up, check the power supply
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
35 independtly, then inserting the boards one at a time.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
36
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
37
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
38 PSU
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
39 ===
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
40
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
41 So the first step has been to check wether the PSU is working fine. Overall, it
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
42 looks OK:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
43
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
44 .. image:: {static}/images/eip545b/psu.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
45 :alt: The A101 PSU board
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
46
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
47 There are many tantalum capacitors in this unit, including on the PSU board:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
48
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
49 .. image:: {static}/images/eip545b/psu_tantalums.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
50 :alt: Tantalum capacitors on the PSU board
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
51
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
52 But they seem OK, so I gave it a try with no load, but using a variac to rise
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
53 the input voltage slowly:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
54
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
55 .. image:: {static}/images/eip545b/psu_test.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
56 :alt: Testing the PSU board
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
57
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
58 I plan to build myself a nice isolation transformer unit using this variac, a
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
59 true isolation transformer I have and the power meter shown on this picture,
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
60 but that's another story.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
61
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
62 The results are ok so far, voltages are OK. The PSU seems to work just fine.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
63
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
64 Cleaning the unit
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
65 =================
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
66
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
67 The next step has been to completely disasseble the counter in order to clean
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
68 it properly.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
69
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
70 It's a quite simple unit, easy to disassemble, so it took me only a few hours
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
71 to do so.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
72
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
73 My only complain is to be obliged to disolder a few wires to disassemble the
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
74 components from the back panel.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
75
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
76 I'e washed every part I could in my kitchen sink, with dishwashing soap and a
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
77 duster, includind the A100 interconnect board.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
78
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
79 Other PCB board have been cleaned with a small tooth brush, some cloth, and
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
80 isopropyl alcohol.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
81
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
82 I also tried to remove a bit of the rust from the YIG filter using some
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
83 scotch-brite, but I could not really clean it without disassembling it, and I'm
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
84 not sure wether it is safe to open the enclosure of the YIG filter or not (if
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
85 it's sealed with special gas for example). Also, I wanted to check if it works
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
86 before doing anythno stupid.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
87
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
88 Reassembling and testing
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
89 ========================
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
90
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
91 Then I started to reassemble the unit, just putting back togother the front
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
92 panel, the CPU and the PSU.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
93
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
94 Once powered, nothing happened, the display did not lit... It happened I forgot
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
95 to put back the 7805 regulator dedicated to the front panel (and mounted on the
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
96 aluminium chassis for heat dissipation). Doh!
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
97
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
98 Once fixed, the unit did power up, and reacted to some keys:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
99
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
100 .. image:: {static}/images/eip545b/test_cpu.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
101 :alt: Testing the unit with only the CPU board
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
102
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
103 So far so good. Now the time for testing the other boards.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
104
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
105 After inserting all the boards but the optional A102 GPIB board, the unit still
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
106 powered up, but the keyboard was mostly unresponsive, and the "remote" led was
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
107 lit. Putting back the GPIB board did the trick.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
108
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
109 I also had to plug the 10MHz In/Out switch back (located on the back panel),
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
110 since the default (open) position is for "External Reference".
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
111
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
112 Now I can interact with the device. In band 3, and I can hear a small noise,
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
113 typical for a YIG coil sweeping the range... Good sign!
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
114
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
115 Let's put some signal, first a 6MHz on the band 1 input:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
116
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
117 .. image:: {static}/images/eip545b/working_band1.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
118 :alt: Testing a 6MHz signal on band 1 input
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
119
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
120 It works! I quickly checked band 2 (using a piece of wire since the connector
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
121 is broken), and it seems to work fine. And band 3:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
122
115
6b6e13653348 content: use {static} instead of {filename} in image paths
David Douard <david.douard@sdfa3.org>
parents: 82
diff changeset
123 .. image:: {static}/images/eip545b/working_band3.jpg
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
124 :alt: Testing a 1GHz signal on band 3 input
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
125
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
126
82
4d8bca9ff106 [eip545b] few typos
David Douard <david.douard@logilab.fr>
parents: 74
diff changeset
127 I've checked up 2GHz, the max frequency I can generate using my Anristu MG3670B
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
128 signal generator.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
129
82
4d8bca9ff106 [eip545b] few typos
David Douard <david.douard@logilab.fr>
parents: 74
diff changeset
130 A quick test showed that the sensitivity is not as expected: could not measure
73
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
131 any signal below -12 ou -13dBm.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
132
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
133
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
134 Next steps
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
135 ==========
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
136
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
137 Next steps for this unit are now:
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
138
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
139 1. Finishing the repair, changing the broken BNC connector, the broken fan
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
140 (which was in fact the culprit for the blown fuse), as well as, maybe,
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
141 removing the rust from the YIG filter.
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
142
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
143 2. Make some performance tests and calibrations (as far as I can do using my
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
144 equipment).
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
145
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
146 3. I also want to try to install the Option 2 (Power Meter). This procedure is
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
147 pretty simple (as long as I manage to program a few 2716 EPROMs with my
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
148 `MiniPro TL866`_ universal programmer) and has been done by several_
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
149 people_, but always on the 545A model, not the B model. Not sure if I can
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
150 use the EPROM images kindly provided by GBPPR_...
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
151
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
152
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
153
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
154 .. _people: http://www.qsl.net/n/n9zia//vision/EIP_545A_Modification_Instructions.pdf
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
155 .. _several: http://www.simonsdialogs.com/2014/09/eip-545a-microwave-counter-power-meter-upgrade/
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
156 .. _GBPPR: http://www.qsl.net/n/n9zia/vision/
e80d307aa643 [eip545b] new blog post on the EIP545B RF Counter
David Douard <david.douard@logilab.fr>
parents:
diff changeset
157 .. _`MiniPro TL866`: http://autoelectric.cn/EN/TL866_main.html

mercurial