Hi One way or the other it *thinks* the OCXO is off frequency. That could be for a number of reasons. The most likely:
1) The OCXO really is off frequency. 2) The EFC is shorted internally and it’s not tuning (which shows up as 1 above) 3) The OCXO is not heating up (which shows up as 1 above) 4) The GPS is not putting out what it should (doubtful) 5) The frequency comparison “stuff” is broke (also doubtful) Indeed, checking the OCXO with an accurate counter is a good starting point. Watch it as it goes from turn on to the EFC error. That should give you a pretty good idea of what is happening. The OCXO in the 3816 sure *looks* like the one in the KS boxes. Last time I looked, you could get one of them for $25 plus shipping. Yes that price may have changed by the time you read this. Bob > On Aug 1, 2015, at 4:09 AM, Gary Beech <[email protected]> wrote: > > Hi All, > > This is my first post. > > > > I have a Z3816A which is giving me an EFC error during start-up and a Alert > Led. > > > > Before the error I get a EFC value of 484042 and the is 2.4 volts on the EFC > pin of the TCXO > > > > Initially there are no errors. > > > > After acquiring 4 satellites the error occurs, the EFC value is 0 and the is > about 20mV on the EFC pin of the TCXO. > > > > Any suggestions? > > > > I was next going to measure the output frequency on a GPS disciplined > counter. > > > > Thank you > > > > 73 Gary vk2kyp > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
