comparison: content/eip545b.rst
content/eip545b.rst
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| 10 | 10 |
| 11 | 11 |
| 12 I recently purchased a broken EIP 545B microwave frequency counter on ebay. It | 12 I recently purchased a broken EIP 545B microwave frequency counter on ebay. It |
| 13 was very inexpensive (around 150€ delivered), but obviously, non working. | 13 was very inexpensive (around 150€ delivered), but obviously, non working. |
| 14 | 14 |
| 15 .. image:: {filename}images/eip545b/closed_unit.jpg | 15 .. image:: {static}/images/eip545b/closed_unit.jpg |
| 16 :alt: The EIP 545B RF Counter | 16 :alt: The EIP 545B RF Counter |
| 17 | 17 |
| 18 The device was described as "does not power up", an is clearly not in very good | 18 The device was described as "does not power up", an is clearly not in very good |
| 19 condition. Quite dirty, battered, with the band 2 BNC connector ruined. | 19 condition. Quite dirty, battered, with the band 2 BNC connector ruined. |
| 20 | 20 |
| 21 But inside, it was **very** dusty and a bit rusty: | 21 But inside, it was **very** dusty and a bit rusty: |
| 22 | 22 |
| 23 .. image:: {filename}images/eip545b/inside.jpg | 23 .. image:: {static}/images/eip545b/inside.jpg |
| 24 :alt: Once opened, it's very dusty | 24 :alt: Once opened, it's very dusty |
| 25 | 25 |
| 26 The YIG filter looking not so good: | 26 The YIG filter looking not so good: |
| 27 | 27 |
| 28 .. image:: {filename}images/eip545b/rusty_yig.jpg | 28 .. image:: {static}/images/eip545b/rusty_yig.jpg |
| 29 :alt: The rusty YIG filter | 29 :alt: The rusty YIG filter |
| 30 | 30 |
| 31 | 31 |
| 32 I quickly checked, and indeed, nothing happened when I tried to power it up. In | 32 I quickly checked, and indeed, nothing happened when I tried to power it up. In |
| 33 fact, the fuse was blown. So, instead of just give a try with a new fuse, I | 33 fact, the fuse was blown. So, instead of just give a try with a new fuse, I |
| 39 === | 39 === |
| 40 | 40 |
| 41 So the first step has been to check wether the PSU is working fine. Overall, it | 41 So the first step has been to check wether the PSU is working fine. Overall, it |
| 42 looks OK: | 42 looks OK: |
| 43 | 43 |
| 44 .. image:: {filename}images/eip545b/psu.jpg | 44 .. image:: {static}/images/eip545b/psu.jpg |
| 45 :alt: The A101 PSU board | 45 :alt: The A101 PSU board |
| 46 | 46 |
| 47 There are many tantalum capacitors in this unit, including on the PSU board: | 47 There are many tantalum capacitors in this unit, including on the PSU board: |
| 48 | 48 |
| 49 .. image:: {filename}images/eip545b/psu_tantalums.jpg | 49 .. image:: {static}/images/eip545b/psu_tantalums.jpg |
| 50 :alt: Tantalum capacitors on the PSU board | 50 :alt: Tantalum capacitors on the PSU board |
| 51 | 51 |
| 52 But they seem OK, so I gave it a try with no load, but using a variac to rise | 52 But they seem OK, so I gave it a try with no load, but using a variac to rise |
| 53 the input voltage slowly: | 53 the input voltage slowly: |
| 54 | 54 |
| 55 .. image:: {filename}images/eip545b/psu_test.jpg | 55 .. image:: {static}/images/eip545b/psu_test.jpg |
| 56 :alt: Testing the PSU board | 56 :alt: Testing the PSU board |
| 57 | 57 |
| 58 I plan to build myself a nice isolation transformer unit using this variac, a | 58 I plan to build myself a nice isolation transformer unit using this variac, a |
| 59 true isolation transformer I have and the power meter shown on this picture, | 59 true isolation transformer I have and the power meter shown on this picture, |
| 60 but that's another story. | 60 but that's another story. |
| 95 to put back the 7805 regulator dedicated to the front panel (and mounted on the | 95 to put back the 7805 regulator dedicated to the front panel (and mounted on the |
| 96 aluminium chassis for heat dissipation). Doh! | 96 aluminium chassis for heat dissipation). Doh! |
| 97 | 97 |
| 98 Once fixed, the unit did power up, and reacted to some keys: | 98 Once fixed, the unit did power up, and reacted to some keys: |
| 99 | 99 |
| 100 .. image:: {filename}images/eip545b/test_cpu.jpg | 100 .. image:: {static}/images/eip545b/test_cpu.jpg |
| 101 :alt: Testing the unit with only the CPU board | 101 :alt: Testing the unit with only the CPU board |
| 102 | 102 |
| 103 So far so good. Now the time for testing the other boards. | 103 So far so good. Now the time for testing the other boards. |
| 104 | 104 |
| 105 After inserting all the boards but the optional A102 GPIB board, the unit still | 105 After inserting all the boards but the optional A102 GPIB board, the unit still |
| 112 Now I can interact with the device. In band 3, and I can hear a small noise, | 112 Now I can interact with the device. In band 3, and I can hear a small noise, |
| 113 typical for a YIG coil sweeping the range... Good sign! | 113 typical for a YIG coil sweeping the range... Good sign! |
| 114 | 114 |
| 115 Let's put some signal, first a 6MHz on the band 1 input: | 115 Let's put some signal, first a 6MHz on the band 1 input: |
| 116 | 116 |
| 117 .. image:: {filename}images/eip545b/working_band1.jpg | 117 .. image:: {static}/images/eip545b/working_band1.jpg |
| 118 :alt: Testing a 6MHz signal on band 1 input | 118 :alt: Testing a 6MHz signal on band 1 input |
| 119 | 119 |
| 120 It works! I quickly checked band 2 (using a piece of wire since the connector | 120 It works! I quickly checked band 2 (using a piece of wire since the connector |
| 121 is broken), and it seems to work fine. And band 3: | 121 is broken), and it seems to work fine. And band 3: |
| 122 | 122 |
| 123 .. image:: {filename}images/eip545b/working_band3.jpg | 123 .. image:: {static}/images/eip545b/working_band3.jpg |
| 124 :alt: Testing a 1GHz signal on band 3 input | 124 :alt: Testing a 1GHz signal on band 3 input |
| 125 | 125 |
| 126 | 126 |
| 127 I've checked up 2GHz, the max frequency I can generate using my Anristu MG3670B | 127 I've checked up 2GHz, the max frequency I can generate using my Anristu MG3670B |
| 128 signal generator. | 128 signal generator. |
