[time-nuts] TADD-1 six channel RF distribution amplifier

John Ackermann N8UR jra at febo.com
Fri Mar 28 10:52:24 EDT 2008


Steve said the following on 03/27/2008 09:35 PM:
> I'm thinking about using the TAPR TADD-1 six channel RF distribution 
> amplifier to distribute the 10MHz output of my Trimble Thunderbolt to a 
> few pieces of test equipment.
> 
> What does the TADD-1 do to the phase noise characteristics of its 
> outputs as compared to the phase noise characteristics of  its input? 
> Improve? Degrade? Little or no change?
> 
> Thanks.
> 
> Steve K8JQ
> 

I did some testing a while ago on a TADD-1 as well as an HP 5087A and
Spectracom 8140T line amplifier.  At 5 MHz, for offsets above 1 Hertz,
the TADD-1 is better than the HP amp (the 5087A is better at very low
offsets, though).  The results are at
http://www.febo.com/pages/amplifier_phase_noise/

I've learned a bit about technique since I did this test, and want to
rerun it one of these days.  But the data shouldn't be more than a few
dB off.

John



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