Yes, and the even harmonics are due to the waveform not being symmetrical (eg. 50%). The 5MHz subharmonic is probably due to a little jitter that comes out of the synthesizer/divider at that rate.
-Chuck Harris Götz Romahn wrote:
Hendrik, the 10 MHz may not be dirty. The spectrum you show is that of a 10 MHz rectangular wave and that's what on the output from the 10 MHz connector, just a (may be clean) TTL-level signal, nothing fancy. Götz
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