Author Topic: TEK 7a29 not showing trace or waveform  (Read 300 times)

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Offline Eth7an

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TEK 7a29 not showing trace or waveform
« on: April 04, 2019, 02:15:35 pm »
When I use my Tek 7104 scope which I just got with two 7a29 modules, only one of them works. Everything is good with the mainframe and I have tried swapping in and out different modules. The working 7a29 of course works on both left and right vertical channels of the mainframe, but so do some of my other vertical modules rated for 600mhz. When the broken 7a29 is in the mainframe and I select its channel and find beam, I can see it somewhere near the top of the crt. The position adjustment does nothing, unlike the working one which moves it even when find beam is enabled. It does sweep properly, so there is a trace, but with the working module in find beam mode, I can see the cal waveform, just a little blurry and small. The defective module shows nothing.

If anybody has any idea on what could be wrong or what I could fix, that would be awesome!

Thank you guys,

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