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I will check tomorrow. Assume you ask if the jitter would stop in NORM trig mode? Or should I do the whole sine/square ch1/ch2 alternate testing as before once again?

Oops, I meant to instead write "MUR160", just in case.

If I understood correctly, given the suggestion that the horizontal jitter may be related to the DC power fed to the sweep circuit electronics, I am thinking that tracing the corresponding DC power

Unfortunately the server where the video was uploaded is temporarily down due to a fire at the datacenter on a UPS. I am hoping it will be back online later tomorrow.

Sadly, that link? https://miwww.com/tmp/2247A_jitter.mp4? times out for me.? :-( Did you take it down? Dave G8KBV. -- Created on and sent from a Unix like PC running and using free and open source

Wow, you really must be an expert, looking at the authority of your above response, and a polite one as well. Good luck finding the power problem that makes the horizontal PLL (?!) lose its lock.

Lighten up dude. What supreme race do you claim to be from ? I do not happen to agree with your smart ass statement of "Most definitely a trigger level (jump) issue....." make any sense to you?”

and Follow Ozan's suggestion and report back. Also, read up on 'scope theory. Does my comment " Most definitely a trigger level (jump) issue....." make any sense to you? Raymond

Looks like the horizontal PLL is losing its lock. I still suspect power. Sent: Monday, July 10, 2023 11:10 To: [email protected] Subject: Re: [TekScopes2] 2247A occasional horizontal jitter Here is

I could be wrong, and very frequently I am. But it seems to me that the lowest common denominator would be power. I would suspect that sweep circuit electronics are getting a zap occasionally by a

Most definitely a trigger level (jump) issue. With a sine wave, the trigger level influences the phase angle where the trace starts, with a square wave, any trigger level between the peak levels

Does it show the same behavior if you select "NORM" mode for trigger? Ozan

Here is a 9 second mp4 video file (18Mb) filmed with my cellphone: https://miwww.com/tmp/2247A_jitter.mp4

Just in case this might be additional useful information: Ch1 input a square wave, ch2 a sine wave. Both at same frequency and amplitude. No jitter shown while trigger source is set to Ch1 (square

Thanks for your response Dave. At the time I was looking at some audio frequencies between 30Hz to 16Khz, sine wave, AC input coupling. The jitter seems to occur regardless of the sweep speed or input

Good council Sam and thank you once again.

Good morning Mike and thank you very much for that article and list.? I have the manual in front of me and I am going to compare.? The parts listing sure saves a ton of research on Digikey and

Thanks very much Sam.? I swear I looked on Ebay and other places, I may have used wrong search terms.? Like "capacitor kit for Techtronics" or something.? In any event, thanks I will pick one up.

I found this old quote on cap replacement that should be noted again: To: [email protected] Sent: Friday, March 26, 2021 11:37:29 AM Subject: Re: [TekScopes] Recapping Tektronix 2465 You may already

One more thing on the capacitor set. The seller requests pictures of your PCB assemblies before he will ship you an order to assure that you will have a complete set of the correct capacitors. This is