Hi Unless it’s a really weird termination impedance, it’s broke. The SMA is a pretty good indication that it *should* work into a 50 ohm load.
The only other possibility is that your probe is taking the load far enough off of 50 ohms to mis-tune the output filter. I’d set the scope to 50 ohm input and cabe the output directly to it. If that’s not practical, put a 6 db 50 ohm pad on the output of the oscillator and see what it looks like after that. Bob > On Jan 29, 2016, at 10:19 PM, Logan Cummings <[email protected]> wrote: > > Hi All, > > Curious what could give this waveform (attached) - I presume this is > not correct output for this oscillator (surplus/salvage from Harris > Constellation receiver). > > Frequency looks OK with +2V EFC but output looks like neither sine nor > any CMOS I've seen into 10Mohm (first capture, scope probe alone) or 50ohm > (50ohm term at SMA connector, probed by same scope probe) . > > What gives? If I open up the can, what am I looking to possibly > replace/eliminate? How to open it? It's soldered shut (2x2in case). > > I need a good low-noise 100MHz sine wave for my application so I'm > tempted to open this guy up and replace the output circuitry with something > more suitable. > > Thanks in advance for any pointers/info on these units! > -Logan > <tek00000.png><tek00001.png>_______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
