[time-nuts] LH Z3801 and XP stalling

paul swed paulswedb at gmail.com
Mon Dec 26 10:18:40 EST 2016

Hope you have had a great Holiday so far.
Wanted to get back to you on LH with multiple Z3801s.
Have tried the following.
Win XP and Vista
2 X Z3801s
USB ports and real RS232 ports flow control and no flow control.
LH, HP Satstat and gpscontrol

LH stalls on both operating systems and both types of ports.

Satstat and gpscontrol run forever on both Z3801s.
LH and a TBolt work on usb and real serial ports without issue.

Have looked at all of the commands in LH and do not see anything that might

Great program but doesn't help me much.
By the way now thatthe second Z3801 is working with a Piezo oscillator, I
am mapping a FRS C rubidium into the Z3801 to see how it does. I may guess
a 10X improvement from what I have seen.


On Tue, Dec 13, 2016 at 8:21 PM, paul swed <paulswedb at gmail.com> wrote:

> Mark
> I agree with the 3 seconds thats what I see with HP sastat, gpscontrol,
> and z38XX which are all working fine. So your saying the z3801 is going to
> sleep or is it Heather?
> How might I change Heather to get around the issue please?
> Thanks
> Paul
> On Tue, Dec 13, 2016 at 4:27 PM, Mark Sims <holrum at hotmail.com> wrote:
>> I suspect that your system is set up to go to sleep.
>> If that happens Heather won't see the response to the last message it
>> sent.   For SCPI receivers, Heather polls the device for a new piece of
>> information every time it gets a response.  The requests alternate between
>> the time code message and some receiver status value.  At xx:xx:33 Heather
>> requests the syst:stat page which takes three seconds to come in.
>> No response to a request? No new request sent out...  If a new  response
>> is not seen within a receiver-dependent timeout (5-20 seconds for the
>> Z3801A), Heather attempts to restart communications, but a sleeping system
>> borks that.
>> ------------------
>> >   So pretty excited about LH running a Z3801. But what I am seeing is a
>> consitent stall roughly 45-50 minutes in.
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