[time-nuts] HP/Symmetricom 58535A and 58536A

[SAIDJACK at aol.com]

Hi Joe,
 
I have the same problem with my Thunderbolt even though my splitter  works 
well. Not sure why. This is especially so if I cascade the Agilent unit  
with a passive splitter, I can never get the Thunderbolt to lock up.
 
I think the added noise of the Amp may play funny with the Thunderbolt's  
receiver, and there may not be anything wrong with your splitter.
 
M12M's and uBlox receiver's don't have a problem at all, even if two units  
are cascaded. They do start to have issues with three splitters in series.

Do you have another receiver you can try?
 
In terms of schematics, it's really straight forward, see the Mini-circuits 
 website for sample schematics for the ERA part, the agilent unit has  
pretty much the same setup.
 
The amp is followed by a resistive splitter, and possibly a resistive  
attenuator (on the 2-port version). Then a cavity filter, then the N-Connector,  
very simple, not much that can go wrong.
 
bye,
Said
 
 
 
 
In a message dated 10/31/2009 18:21:16 Pacific Daylight Time,  
jltran at worldnet.att.net writes:

Said,

Thanks for the reply.  This is certainly a starting  point.  A schematic
would be wonderful.  I have looked and have  not found one yet.

The units both provide about 4.5 VDC to the center  pin when any port is
connected to my Tbolt.  However, the signal  amplitude, as measured by
TBoltMon, is essentially non existent on the 4  way splitter and divided by
at least 2 on the 2 way splitter.   Therefore, I suspect the amplifier is
dead.  Did not know about the  voltage regulator.  Will open one and get  to
work.

Thanks,

Joe