EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: laceypaul on February 11, 2021, 08:01:35 pm

Title: Standard Research SR760 FFT Spectrum Analyzer - CRT Sync Issue
Post by: laceypaul on February 11, 2021, 08:01:35 pm

I have a SR760 FFT Spectrum Analyzer.  Once warmed up all is good, but for the first 5 minutes or so, the CRT display has a sync issue.  Standard Research have not been very helpful with circuit diagrams etc. so wondered if anyone has any ideas?

Thanks

Paul

Title: Re: Standard Research SR760 FFT Spectrum Analyzer - CRT Sync Issue
Post by: PA0PBZ on February 14, 2021, 11:50:51 am

Check for dried out electrolytic capacitors in the monitor module.

Title: Re: Standard Research SR760 FFT Spectrum Analyzer - CRT Sync Issue
Post by: nctnico on February 14, 2021, 12:24:57 pm

Freeze / cold spray is a good tool for finding which part is the cullprit. Many times the problem is in electrolytics going bad but not necessarily.