[time-nuts] Even Seconds Pulse option (1PP2S), HP 58503B

[djl]

To replace one?


On 2019-09-29 10:22, paul swed wrote:
> On second thought (Pun intended)
> Its a pendulum clock output. Have no idea why some one would use a 
> GPSDO to
> drive a pendulum clock but that could be a reason for such a thing.
> Paul
> 
> On Sun, Sep 29, 2019 at 12:02 PM Dana Whitlow <k8yumdoober at gmail.com> 
> wrote:
> 
>> I can't speak for 1/2PPS, but at the Arecibo Observatory we 
>> distributed
>> 1PPS with every
>> 10th second's pulse stretched to about twice the duration of the 
>> others.  I
>> did find that to
>> be kind of handy every now and then, when troubleshooting things.
>> 
>> Dana
>> 
>> 
>> On Sun, Sep 29, 2019 at 8:36 AM Gregory Beat via time-nuts <
>> time-nuts at lists.febo.com> wrote:
>> 
>> > A new resident arrived at the “Time Cave” this weekend, the
>> HP/Symmetricom
>> > 58503B.  Just the plain front panel (4 LEDs) model, without Option 1 (VFD
>> > clock display).
>> > Acquired in USA, cheaper than current Asian exporter.
>> > https://accusrc.com/uploads/datasheets/4975_58503b.pdf
>> >
>> > Supposedly stored in a closet since 2010 (verified by its diagnostic
>> > logs), the unit only had 2,000 hours of operation.
>> > Today, it happily has a GPS Lock and is currently “re-learning” where the
>> > 1 PPS and 10 MHz outputs wandered (taming Lazarus).
>> > —
>> > One surprise, it has Option 2 (1PP2S) installed on its Rear Panel.
>> >
>> > Option 002 : 1 PP2S (One-Pulse-Per-Two-Seconds) connector for outputting
>> a
>> > pulse every other second, synchronized to the even seconds in GPS time.
>> > Pulses occur on even-numbered seconds (i.e., 2 seconds, 4 seconds, etc.).
>> > ===
>> > QUESTION:
>> > What Specific Applications would use this 1PP2S output regularly??
>> >
>> > greg
>> >
>> > Sent from iPhone 6s
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-- 
Dr. Don Latham  AJ7LL
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304