[hpsdr] Question - phase noise and reflock

[David Woodhead]

It depends on the loop bandwidth and the phase noise of the reference...


Since the intention is to correct slow frequency drift (usually
temperature induced), a very slow (narrow) loop is acceptable and
probably desirable (unless the reference phase noise exceeds that of the
final output after 20logn correction). Such a scheme is commonly used
for just this purpose and will have very little or no affect on the
phase noise of the locked LO.

David
KM5TZ


-----Original Message-----
From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On Behalf
Of Richard Hosking
Sent: Saturday, May 13, 2006 4:25 PM
To: HPSDR List
Subject: [hpsdr] Question - phase noise and reflock

***** High Performance Software Defined Radio Discussion List *****

A further question (I have a few!)

What is the effect on phase noise of the final LO  when you lock the 
clock standard?
Is there a good reference for this?

Richard
VK6BRO
_______________________________________________
HPSDR Discussion List
To post msg: hpsdr at hpsdr.org
Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
HPSDR web page: http://hpsdr.org
Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/


 1147717466.0