HI A lot depends on just how tired the tube in your scope is. Some of these scopes have spent a lot of hours turned on and wearing out the filament ....
The easy thing to do is to vary the trigger point and watch the "trigger" light. It should tell you if the pulse is there or not. If it's not, then either it's turned off or there's something keeping the electrons from getting to you (like a blown chip). Bob On Feb 7, 2010, at 8:56 PM, Bruce Griffiths wrote: > John Ackermann N8UR wrote: >> Sal, what sweep time are you using on the scope? I believe the TBolt PPS is >> only microseconds wide, so you may need to speed up the sweep time to around >> 100us/div or faster to see it accurately. And you may need to mess with >> delaying the sweep to get the pulse on the screen. >> >> John >> ---- >> > You would need to delay the sweep by 0.999999s to get the leading edge on > screen if the internal scope vertical delay line is insufficient. > > With a sweep speed of 2us/div the entire pulse is clearly visible (even > without a viewing hood and light from a window (overcast sky) falling > directly on the screen) without any delayed sweep. > NB trigger on the leading edge which has a positive slope. > > Bruce > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
