Hi Bob:
The DC supply in the HP 4352 VCO test set is very special in that it's output
voltage has extremely low noise.
Another option is to use a battery(s) for the control voltage.
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Brooke Clarke
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Bob Camp wrote:
Hi
Be careful when you do find the data.
When you go very close in on something like a VCO, you get much higher phase
noise
than we normally worry about. Some of the “assumptions” that underly the
measurements
are no longer true. Small angle of modulation is one, but there are a few
others. A simple
“plug it in and read it” may not give you valid information without some
corrections. Coming
up with a supply that’s good enough (at 1 Hz) would be a major challenge ...
Bob
On Jun 17, 2015, at 11:23 PM, Jim Lux <jim...@earthlink.net> wrote:
On 6/17/15 1:08 PM, Magnus Danielson wrote:
Jim,
John Miles have been a bit active:
http://www.ke5fx.com/brick/brick.htm
Just to give you a start-sample.
those seemed to be all PLL outputs.. I didn't see the bare VCO data.
And, I'm really interested in the 1 Hz to 100 Hz kind of range.
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