The Rb was externally calibrated and then left to free run. They then used DDS to get frequency o/p. Austron used this technique a lot with their later telecom GPS modules.
Rob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Luciano Paramithiotti Sent: 19 May 2013 09:14 To: time-nuts@febo.com Subject: [time-nuts] Austron 2200A investigation Hi, I have an Austron 2200A with FRS rubidium option. After 30 min. powerup and locking, PPS and Freq alarm goes up. The receiver position and the FRS are ok. Looking the Rubidium and controller connection cable, I have seen the pin 8 (frequency control)of the rubidium is never been connected. The question are: 1) how the PLL can happen? Cannot ! Different operation? 2) some one have the interface's schematic p.n. 10312676 "Osc cntl freq cntr" ? thank you, -- Luciano Timeok visit : www.timeok.it _______________________________________________ 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. _______________________________________________ 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.
