[time-nuts] "Better" gps antennas than a Symmetricom 58532A

[John Lofgren]

< snip >
And it's not clear that there's actually "loss" due to mismatch.  Most 
antennas/preamps/receivers don't have exactly 50 ohm impedances.  75/50 
is only 1.5:1, and there's an awful lot of antennas and receivers out 
there that only claim 2:1 VSWR.  The usual spec for the antenna is 
1.5:1, so for all you know the Antenna and Receiver is already 75 ohms, 
and RG6 will give you a better match than 50 ohm LMR400.
< snip >

An excellent point.  A similar issue is the connectors.  If you read the data sheets for many common connectors and adapters you'll find that a lot of them are only rated for a 1.2:1 VSWR.  I ran into this issue a few years ago when trying to measure reflection coefficient in a system using TNC connectors.  It turned out that the connectors set the VSWR limit, not the test of the measuring system.

-John