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Author Topic: Polarad 640-1 Spectrum Analyzer Service manual  (Read 621 times)
G3UEQ
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Posts: 5




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« on: March 26, 2013, 03:52:39 AM »

Hi
Just been given a Polarad 640-1 Spectrum analyzer, got it working after changing the blue tantalums in the PSU, appears to be working well but would like to re-calibrate and confirm specifications, so if anyone has cal instructions, circuit or a manual it would be great.
The only real problems noticed is that when I change Sweep bandwidth the base line goes all over the place and not sure if the phase lock circuitry is working, however putting it on my Marconi 2019a generator the display looks good.
73
Andy G3UEQ
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