Re: [time-nuts] Z3801A expert?

[Ben Hall]

Hi Hal and list,

On 9/24/2015 2:29 AM, Hal Murray wrote:

It runs all the tests again and didn't find any errors, but it remembers that
it has seen an error sometime recently that hasn't been cleared.


That makes sense - I was able to find a log entry in the diagnostic log 
saying "self-test failed."  If I power-cycle the unit, it will boot up 
and fail the self-test again.


Interestingly, the error queue reads +0, "No error".


There may be a clear-errors command.  If you can't find that, there is
probably a restart command that goes through the whole boot sequence all over
again.


I dug *deep* into the manual last night.  Couldn't find a command that 
would do that, but I'm convinced now that I've got a real error that's 
recurring versus one that set once and cleared.


The hardware status register when polled says "1" which per the manual 
translates into "self test failed."


Interestingly, the unit seems to be performing fine.  After all the 
reboots and me fiddling with it last night, it settled down to a PU of 
5.0 us/initial 24 hours and TFOM = 3, FFOM = 0.


I'm going to run the unit until it fails.  With a power-on-time of 13.5 
years, it probably doesn't owe me a thing.  :)


thanks much and 73,
ben, kd5byb

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[time-nuts] Z3801A expert?

[Ben Hall]

Hey guys,

I suspect we may have a Z3801A expert on the list.

A couple of nights ago, we had a power failure.  GPSCON says that my 
Z3801A has failed self-test, but everything else looks fine:


Self Test: Err
Int Pwr:  OK
Oven Pwr:  OK
OCXO:  OK
EFC:  OK
GPS Rcv:  OK

The whole screen can be seen here:



When I command a self test via *TST? command, it returns 0, which is no 
error.


Not sure why GPSCON is reporting a self test error.  Any advice?  It 
seems to be functioning normally in all respects.  :)


thanks much and 73,
ben, kd5byb
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