[time-nuts] HP53131A RS232 question

Bob Camp kb8tq at n1k.org
Fri Dec 2 13:15:25 EST 2016


With a 1 second gate time, you will get one data output per second with the 
settings you have described. I suspect there is something else wrong with your 
setup. The same settings will work for 1 pps and give you one reading output 
per second.  The input level should have no impact as long as it will properly 
trigger the counter. 


> On Dec 2, 2016, at 12:54 PM, <cdelect at juno.com> <cdelect at juno.com> wrote:
> Hi,
> I have not played with my 53131A RS232 for a couple years and have a
> question.
> I want to configure it to "talk" to Hyperterminal so I can log some
> readings.
> I did the 5 items to configure it:
> HW pacing (disabled)
> print on
> baud rate (19200)
> parity
> SW pacing (none)
> with a 5Mhz input I only get data sent about once every 3 seconds, I
> thought with  a 1 second gate I'd get an  output measurement every
> second?
> I would think there is plenty of time to output the first measurement
> before the next one is read!
> Actual setup I'm wanting to do is time interval (at a 1PPS rate) and log
> the results.
> I remember I had it working once and it would be OK as long as I did not
> exceed around 80% of full scale.
> If that happened I would only get an output logged every other second.
> I can live with that part but need to get back to it working below around
> 80%.
> Any advice is most welcome!
> I'm going to configure for the TI and <80% and see what happens.
> Cheers,
> Corby
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