Afonso Teles

Hi Jason,

For the cap replacement question, I would suggest asking the TekScopes mailing list, Tektronix does not offer replacement caps.

For the optoisolator, it's important to know that Tek 9 digit part numbers have a system where the last 2 digits denote backwards compatible (but not necessarily forwards compatible) changes.
So, if your manual lists the optoisolator part number as 156-0885-00, 156-0885-05 should also work.

Hi,

I've seen similar failures before, the contacts go bad and it leads to incorrect configuration (wrong amplitude) or AC coupling, like you see there.

It's just the relays of the attenuator network wearing out and going bad, a replacement would be ideal but if that's not possible, you could try very carefully cleaning them with alcohol or even just cycling them a few times. Tapping on them works as a temporary fix often times.

Hi Om,

waveform:data? is not the correct command, instead you should use the curve? command.

Also, ASCII format is really inefficient, I suggest you instead use a binary format and then use query_binary_values() to read and decode it.

Hi Joel,

No, that's what I meant, there's a part number on the back of the LCD which would allow you to order a new one from a third party.

Unfortunately we generally do not share details about recent instrument design so I would not be able to share what protocols are used for the display. Hopefully you can still do your repair without that information!

Hi Isaac,

Unfortunately the .sogram file format is not publicly documented, I'd suggest using SCPI to get the spectrogram data as we discussed previously and then saving it as your own custom format.

Hi Om,

Here's the latest version of TekVISA: https://www.tek.com/en/support/software/driver/tekvisa-connectivity-software-v420

Hi John,

The TDPs are active differential probes, the TAPs are our active single-ended probes, here's their product page: https://www.tek.com/en/products/oscilloscopes/oscilloscope-probes/low-voltage-probe-single-ended

Hi Om,

Do you have a signal that marks the start of your coincidence window? If so, you could set your scope to trigger on it, set the trigger position to 0% (all the way to the left) and then set your time/div to capture for the length you want (let's say you want a 50 ns window, you'd set the scope to 5 ns/div, or a little more) and set the trigger to norm mode, that way the scope will only capture when it receives a trigger signal as you defined it (in the trigger menu).

Hi Jeremy,

The image format has to be set with the SAVe:IMAge:FILEFormat command before transferring the image, as described on the programmer's manual.

Hi Suny,

I do, I've attached such an example with this post.