[time-nuts] Thunderbolt reception problems

[J. L. Trantham]

I think I was the one that started this.

My problem was the Tbolt did not work when connected to the Symmetricom
splitter alone (except for the antenna of course) but worked great when the
splitter was also connected to a Z3816A.  I think it must have to do with
lack of appropriate power from the Tbolt to power the splitter though I have
not taken any detailed measurements.

If anyone wants a particular measurement, let me know.

I contacted Symmetricom to try to get a schematic of the splitter without
any luck.

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of SAIDJACK at aol.com
Sent: Saturday, November 21, 2009 10:03 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Thunderbolt reception problems


Hi Bjoern,
 
I respectfully disagree. I measured the loss through the GPS amp and Mini  
Circuits splitter at only 10.1dB. That's really not a lot. I couldn't  find 
a loss-spec in the Thunderbolts' specification.
 
The Agilent amp has GPS filters in it that improve signal quality by  
filtering out all non-GPS signals.
 
Someone else had the same problem here (that's how the discussion  
initially started) thinking his Symmetricom splitter was dead. I think it's
safe to 
say a GPSDO can be expected to work with a name-brand GPS splitter  (which 
it did not either for the other gentleman).