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Beginners / Jutter calculation ?
« Last post by GigaJoe on Today at 01:40:19 am »I'm right ?
Jitter 1.5 nS
or it should be divided in 2 -- 750pS
I've replaced a a large number of them in flat screen televisions. LED's don't last as long as it is commonly believed.So have I, but indeed in TVs, especially the cheap ones. they (can) overdrive them for brightness (which people seem to abuse). There's no excuse for that in a scope screen where you are viewing a subdued image and from a meter distance or less.
WoD
Oscilloscopes are for displaying signal waveforms, not creating them.
Hi,Sanity check:
I think I accidentally overloaded the input to my SA one too many times. My input impedance is no longer 50 Ohms. It still functions sortof.
I took the input board out and started looking around. I saw a 49R9 resistor which I assume is the termination resistor, it actually measures fine. I it looks like there are some clamping diodes on the input path and they seem fine. the input cap measures at 1uF, seems OK. Nothing looks like it got toasty.
The first IC in the input path is U1 a 956p, the 49R9 resistor is after that component in the path. Makes me wonder if that is the part I damaged.
I can't find any info on what that part is, anyone here know? Has anyone found schematics for this SA?
After some research, I believe the part is a GaAs MMIC. Still can't find a datasheet for the 956P to be sure.
Thanks
Joel
The backlight is LED, so it's not likely to ever wear out, as it were.