The Tbolt Limit alarm indicates that the Dac is near it ALLOWED limit. It will come on early if the min or max dac voltage has been reset to a low value, such as min Dac voltage = 0. ***************** Hi I would agree that it's a limit alarm - except, I've seen the alarm come on when the DAC was at 0.5V. Bob -----Original Message----- From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Mark Sims Sent: Tuesday, July 19, 2011 8:35 AM To: time-nuts at febo.com Subject: [time-nuts] TBolt question: Osc Age Alarm The OSC AGE ALARM is a minor alarm that indicates the oscillator control voltage is near its minimum or maximum value. The manual indicates that if this happens the oscillator will probably be at its control limit within two years. The tbolt firmware does not attempt to estimate the oscillator aging rate. The alarm is based only upon the control voltage value. Once the oscillator control voltage reaches its limit, the major OSC: BAD alarm is signaled. _______________________________________________ time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.