[time-nuts] Repair of HP/Agiletn/Symmetricom 5071A Lab Standards

[Tom Van Baak]

See pages 2-15 / 2-16 in the operation & programming manual 
(05071-90041). You want to set the diagnostic log level to "service", 
configure the RS232 port, and run a terminal program on a PC to view or 
capture the results. Power cycle and watch it until the end. Repeat if 
necessary.

You will get a step-by-step account of the warmup and locking process. 
This diagnostic information is very informative. It will help decide if 
you have a temporary, minor, and interesting problem or if you need a 
new CBT (Cesium Beam Tube), which is to say, you will either have a fun 
problem to share or a very bad day.

Feel free to post the log files. A number of us have 5071A and can help 
explain your results.

/tvb


On 2/3/2021 10:35 AM, Jeff Sanders via time-nuts wrote:
> 3 February, 2021
> I have a 5071A Cesium Lab Reference.  The unit is throwing an alarm that indicates a Cesium Tube fault.  Does anyone have a recommendation on getting this unit repaired/
> Jeff Sanders, W5QR
>