[time-nuts] Austron 2200A investigation

Rob Kimberley robkimberley at btinternet.com
Sun May 19 12:42:52 EDT 2013

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.


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Luciano Paramithiotti
Sent: 19 May 2013 09:14
To: time-nuts at febo.com
Subject: [time-nuts] Austron 2200A investigation


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" ?

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