Hi, I recently acquired a very nice portable spectrum analyzer that appears perfect, with one small problem. I've noticed, that over a period of 30min to 1 hr of 'on' time, I get a momentary situation which causes the switchmode supply to 'glitch'. The supply recovers very quickly ( a few milliseconds, max). This glitching is very sporadic, maybe once and hour or so. This is going to make it VERY difficult to track down. My initial thought was that there was a crt HV arc that is causing this, but I am almost wondering if the switchmode supply is dropping out of phase lock or something similar.
In any event, I could use some pointers as to how and attack this troubleshooting problem...
Any and all thoughts are welcome.. Jim WB5KYE