Hi Logan,
My guess is there is some second or third harmonic energy present. I
have observed the very same thing on another oscillator. Look at it
with a spectrum analyzer and see what kind of harmonic energy is there.
Bill....WB6BNQ
Logan Cummings 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
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