Hi Ulrich,
Loop bandwidth could be in the KHz region
or even less.
I could choose more or less freely from Hz to many KHz
but there are obvious tradeoffs and it is hard to decide.
The phase noise of the VCO when I go too narrow versus
the ammount of spurs when I go too wide.
Application is the first LO for an experiment in SDR radio
at VHF-SHF region,(not HF).
Luis Cupido.
ct1dmk.
On 6/21/2011 10:03 AM, Ulrich Bangert wrote:
Luis,
the information that you are concerned about close carrier spurs that will
pass through the PLL's low pass filter is not precise enough: are you
talking about a few Hz, a few ten Hz, a few 100 Hz away from the carrier or
are you going to build a device for precise timing applications where also
spurs far below (perhaps orders of magnitude below) 1 Hz may be of concern?
Best regards
Ulrich Bangert, DF6JB
-----Ursprungliche Nachricht-----
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