[time-nuts] 59503A GPIB clock windows/linux software.

[Don Latham]

It also has an available BNC on the back, if you redo the the external
voltage in, and a couple of unused cmos buffers to give a 1 pps output.
Dob

Tom Van Baak
> Lizeth Norman wrote:
>> The 59309A can be updated via HPIB.
>> I did it two ways. The first was to use windows system time and then
>> write
>> to the instrument. The other was to poll a M12+T and get the proper
>> time.
>> Sadly, both are in Labview, and as such probably aren't much help.
>
> Hans Holzach wrote:
>> i use a 59309A as a time and date display in a setup of old HP
>> devices:
>> 10 mhz are taken from a fury gpsdo to keep the clock stable. an HP 71B
>> reads the time from the gpsdo via an HP-IL/RS-232 interface and
>> delivers
>> it to the clock via an HP-IL/HPIB interface. setting the clock looks
>> pretty cool, there is quite some action on the display! the system is
>> so
>> slow, it takes several seconds until time and date are set. sorry, no
>> linux/windows involved here...
>
> Norm and Hans,
>
> Were either of you able to sync the 59309A to better than a second? From
> the schematic it looks like the P (stoP) and T (starT) commands have 1
> second granularity and the R (Reset) command clears only the last
> MC14518 decade counter. This would suggest that one can set to within
> 100 ms, but no better.
>
> The code that I'm using (http://leapsecond.com/tools/hp59309.c) solves
> the 1 second problem but I wasn't able to get it to sync better than 0.1
> second. If you have suggestions or solved this without a soldering iron,
> let me know.
>
> Thanks,
> /tvb
>
>
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-- 
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Dr. Don Latham AJ7LL
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