Hi A lot of this depends on just what Yuri really needs to do. I can think of a variety of different situations where you might have to isolate things, each with their own inherent issues.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Christian Vogel Sent: Friday, June 18, 2010 8:30 AM To: Yuri Ostry Cc: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Galvanic decoupling of GPS antenna 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 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
