Hello, Thursday, June 17, 2010, 2:44:43, Didier Juges wrote:
D> It is not clear to me why the antenna should be isolated from the D> receiver, I would prefer to keep the antenna and receiver on the D> same return, and isolate that assembly from the rest of the world. D> It is much easier to provide isolation on the supply, RS-232 and D> 10MHz (if you use it) than on the antenna, in my opinion, at least D> as much as it is less likely to have a negative performance impact, D> and you can do it with off-the-shelf parts. Too long story to explain it now. I have very limited power available on those what named "outside world" here. Just enough to "feed" some low-power active GPS antenna (I can allocate approx 15 ma @ 3.6V). In addition, whole design is battery powered, so it will be difficult to allow extra 30-40 ma for DC-DC converter module quiescent current. ;) >From my first look it was a good idea to isolate antenna (and maybe even consider passive antenna if tests will show that there is enough gain) and make a full use of low-power features of that tiny uBlox NEO6Q. -- Best regards, Yuri mailto:y...@ostry.ru _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.