[time-nuts] 5071A

[Tom Van Baak]

Bill,

A 5071A will never go solid-green "continuous operation" on its own. 
That solid-green state is set manually from the blinking-green state, by 
design.

This prevents you from seeing green, having a short power failure 
overnight, and then you come back in the morning and see green and you 
think all is well. The 5061A and 5065A have a similar fail safe.

The yellow LED means attention, as in something's wrong and it did not 
warm up or lock. The internal diagnostics are pretty good so if it gives 
up there's a good reason. The error code is available on the front panel 
LCD or via SCPI over the RS232 port. Depending on the diagnostic log or 
the text of fatal error it's pretty clear when there's no hope. In the 
case of leaky tube or ion pump failure there's nothing wrong with trying 
again and again and again and again until you give up hope.

On the other hand if all goes well during warm-up and lock is achieved, 
yellow goes out on its own and you get blinking-green. It's up to you 
then to manually set it to solid-green.

/tvb


On 7/5/2020 11:50 AM, Bill Notfaded wrote:
> If the power is cycled on one of these will it always go into attention
> mode yellow until cleared?  Or will it go green continuous operation all in
> it's own?  If one of these has been on the shelf a while is it common for
> one even with a good tube to report attention yellow for a while until tube
> pumps down and eventually will the yellow clear on it's own?
>
> Bill
>