[time-nuts] Thunderbolt Harmonics
jimlux at earthlink.net
Thu Jan 19 00:31:04 EST 2017
On 1/18/17 6:25 PM, Tom Holmes wrote:
> Jim Lux...
> Note that the Keysight 33622 is basically an ARB, and not really intended to
> be an RF signal generator.
Yes, but it has performance that is as good as the run of the mill
The big defect in the 33600 series is that it cannot be phase locked to
an external reference. If you feed it a 10 MHz ref, it has a frequency
locked loop that pushes the internal oscillator around to match the
It's output is DAC based, not oscillator based.
> Hence it will tend to have higher distortion products than a good RF
As good as, if not better, than an inexpensive generator (e.g. the low
end Keysight sig gens)
phase noise at non-harmonic frequencies is not as good.
As you point out, a suitable filter for the intended frequency
> certainly can clean that up, of course.
> Tom Holmes, N8ZM
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