[time-nuts] 10MHz to 80MHz frequency multiplier suggestions

Bob Camp lists at rtty.us
Thu Feb 3 17:39:20 UTC 2011


Hi

I have not done this with the specific chip you are using, so I may be off
base. 

With similar chips from the same people, I have had really terrible
increases in phase noise when running them saturated. I'd be careful about
using them as multipliers if noise is a concern.

Discrete transistors, do indeed do a pretty good job when run as you
describe. I have not seen the same sort of issues with them. 

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Paramithiotti, Luciano Paolo S
Sent: Thursday, February 03, 2011 10:39 AM
To: richard at karlquist.com; Discussion of precisetime and frequency
measurement
Subject: Re: [time-nuts] 10MHz to 80MHz frequency multiplier suggestions

 An MSA08 saturated with 10MHz input give a comb with +2.5dBM @80Mhz(see
screenshot). You have only to filter this frequency to clean the output
spectrum.
Regards, Luciano

Luciano P. S. Paramithiotti
IZ5JHJ

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