[time-nuts] Suspected Spam: External clock for Analog to Digital Converter in GPSRx front-end Rx front-end

[Robert Atkinson]

Bilal,
How about using one of the "spread-spectrum" microprocessor clock
generator IC's?
These add a pseudo-random jitter to the clock signal so the interference
from the equipment is slightly spread causing the equipment to pass EMC
testing by causing an apparent reduction in the peak due to the
bandwidth of the test receiver.

Robert.

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Bilal Amin
Sent: 02 March 2007 06:35
To: time-nuts at febo.com
Subject: Suspected Spam: [time-nuts] External clock for Analog to
Digital Converter in GPSRx front-end Rx front-end

Hi Everyone,

I am working on Jitter in Analog to Digital Converters(ADCs) for GPS
receiver front-end. I am trying to setup an experiment to see the
effects of jitter in real time ADCs. I have an ADC evaluation board with
external clock input for sampling (i.e Sampling clock). Now I want to
produce a self created jittery signal to see the effects of jitter in
ADC. Can anyone out there have any idea(s) how I can produce a real time
clock signal with "variable jitter" for the input of external clock?
Producing a simple clock signal (i.e. without jitter) is straight
forward with the help of any signal generator but a clock signal with
"variable jitter" is a problem. 

Thanks for your help.

Cheers

Bilal
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