[time-nuts] GPS Antenna splitters

[Dave M]

Has anyone measured the gain (or loss) of the Minicircuits ZAPD-3DB-1575-3 
GPS antenna splitter?  I've seen a number on the auction site, and am 
wondering if they have any gain.  I see the 3DB in the model number, but 
don't know if it's gain or loss.
I have a TBolt and an HP Z3801A.  I can  use the antenna with only one 
receiver at a time, but would like to run them concurrently.    Since I'm 
using a 25db gain bullet antenna, I certainly don't want to lose any signal. 
If the ZAPD-3DB-1575-3 splitter doesn't provide any gain internally, which 
model splitter(s) can you recommend?

David
dgminala at mediacombb dot net