Hi Yuri,
I'm trying to put gps (for a coarse timing sync and RTC
auto-setting) to a small controller that must be completely
galvanically decoupled from outside world. Antenna power must be
supplied from separate power source (ground potential of isolated part
of circuit can slowly float up to +/- 250 volts referenced to ground
of antenna power supply).
I don't see any need for isolation in the signal chain as long as your
antenna and cable are properly insulated. I have a fully sealed antenna
here on a Thunderbolt and nothing -with exception of the BNC connector
at the cable end- exposes the system ground. So I could easily float
the TBolt and connected PC at +250V without anyone "outside" noticing.
Chris
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