Hi Didier, the drawback of this approach is that everything is connected together as one big circuit, and thus processor noise can get into the GPS front end and reduce the sensitivity and cause other errors.. For RF performance, it's probably better to have the GPS receiver sit all by itself in a shielded enclosure with it's own TCXO. Trimble seems to have done a pretty good job at the layout to handle these types of issues though. bye, Said In a message dated 7/20/2008 18:01:11 Pacific Daylight Time, [EMAIL PROTECTED] writes:
Because Trimble integrated the GPS receiver and the OCXO, they use the OCXO as a clock to run the processor, therefore that source of error is not there. The ultimate performance is not better than a perfectly optimized "conventional" GPSDO + OCXO, but excellent performance can be achieved at lower cost, and without having to deal with certain tradeoffs. Now, I am sure there are other, more subtle details that explain why the Z3801A is generally superior to the Thunderbolt, but that I cannot explain... Didier **************Get fantasy football with free live scoring. Sign up for FanHouse Fantasy Football today. (http://www.fanhouse.com/fantasyaffair?ncid=aolspr00050000000020) _______________________________________________ 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.