Hi Bjoern,
 
Yes. On our FireFly series GPSDO I get up to 45dB signal to noise  ratio 
with a passive 1-to-4 splitter following the Agilent active  splitter.
 
I think there is something going on with the Thunderbolts such as the  
antenna sense circuit not working properly etc, please also see my other email  
following this one.
 
bye,
Said
 
 
In a message dated 11/1/2009 04:04:11 Pacific Standard Time,  
[email protected] writes:

Hi  Said,

> 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.

Did you check that you have enough signal  power for the Tbolt, when
cascading (passive)  splitters?

--

Björn


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