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

Magnus Danielson magnus at rubidium.dyndns.org
Sun Nov 1 11:18:47 UTC 2009


SAIDJACK at aol.com wrote:
> 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.

They do have DC load on the non-DC-thru ports.

Check the open/short status on the thunderbolt. It's very easy to see 
with the Thunderbolt monitor program.

Cheers,
Magnus



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