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

[Bill Beam]

40 to 100 microF electrolytic will work.

On Mon, 30 Sep 2019 12:21:06 +1000, Neville Michie wrote:

>If you have a square wave at .5PPS and you connect a large series capacitor to the coil of a quartz clock
>(less battery) you get alternating seconds pulses drive to an analogue dial.
>50 ohms will easily drive the about 1k coil.
>Cheap quartz clocks make good slaves.
>cheers,
>Neville Michie

>> On 29 Sep 2019, at 22:56, Gregory Beat via time-nuts <time-nuts at lists.febo.com> wrote:
>> 
>> A new resident arrived at the G€œTime CaveG€ 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 G€œre-learningG€ where the 1 PPS and 10 MHz outputs wandered (taming 
Lazarus).
>> G€”
>> 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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Bill Beam
NL7F