[time-nuts] GPS Locked and Unlocked Performance Comparison

[Magnus Danielson]

From: SAIDJACK at aol.com
Subject: Re: [time-nuts] GPS Locked and Unlocked Performance Comparison
Date: Wed, 13 Feb 2008 19:43:58 EST
Message-ID: <bf7.298c42dd.34e4e8ce at aol.com>

> Hi Magnus,
>  
> yes filtering is easier at 10KHz than 1Hz; I wonder how much of the 10KHz  
> modulation signal is getting through into the phase noise at the 10MHz  output.

For a standard 6 dB loop-filter it balances out nicely on the slope.
The gain is on shifting the frequency. 

I have had great succsess in reducing the phase noise by shifting the
comparision frequency upwards in a similar fashion.

I prefer a SR-flip-flop over XOR gate.

Cheers,
Magnus