[time-nuts] Comparing 10 MHz Oscillators at 10 GHz 10 to 100 MHz multiplier

Paramithiotti, Luciano Paolo S luciano.paramithiotti at hp.com
Wed Jan 5 16:03:44 UTC 2011

As requested I have add a PCB bottom side picture.
If someone want some more informations or any help please ask me directly.

I remember you the Maser use a multiplier chain from 5 MHz to 1400Mhz as first LO in the internal receiver used for PLL the FX to 1.420.xxx .

Thank you, Luciano

Luciano P. S. Paramithiotti

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Brucekareen at aol.com
Sent: mercoledì 5 gennaio 2011 0.09
To: time-nuts at febo.com
Subject: [time-nuts] Comparing 10 MHz Oscillators at 10 GHz

Luciano Paramithiotti's January 1 post about his 10-to-100 MHz multiplier project reminded me of past musings about using two 10GHz, phase-locked oscillators to compare the 10MHz outputs of my T-bolt and LPRO so I  could quickly adjust the latter by observing the mixed 10 GHz signals with  a microammeter.  I am talking about the California Microwave, Frequency  West, etc., modules that were used as local oscillators in commercial microwave  systems.
I was about to ask Luciano for more information on his coil forms, amplifiers, and RF chokes when it occurred to me that loop-noise in the PLOs  might force a very narrow bandwidth and correspondingly long observation  time.  
Have members of the list been successful with this technique?
While most common PLO modules require an input signal in the 100  
MHz-range, I have heard of versions that lock directly to a 10 MHz input.   Is anyone 
familiar with these and how difficult it would be to modify  conventional oscillators to securely lock to 10 MHz? 
Bruce, KG6OJI
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