[time-nuts] Lucent RFTFm-II-XO

Bob Camp kb8tq at n1k.org
Thu Sep 22 15:09:47 EDT 2016


Hi

If the PPS is going to run into a run of the mil sound card, the pulse width likely will need to be > (1/20,000) s. That will require a one shot to do. The Lucent PPS is a bit narrower than that, as is the output of a lot of GPSDO’s.

Bob


> On Sep 22, 2016, at 2:41 PM, Bill Riches <bill.riches at verizon.net> wrote:
> 
> Hi Bob,
> 
> If you could,  would you see if you can take the pps out of your lucent box and use it to sync the pc sound card clock via continuous calibration for  using SL for fx measurements.  Maybe by lucent box pps output is bad.
> 
> 15625 from 3586 goes in one channel and pps goes into the other channel of the sound card and SL does its magic.
> 
> 73, 
> 
> Bill, WA2DVU
> Cape May
> 
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Camp
> Sent: Thursday, September 22, 2016 12:55 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Lucent RFTFm-II-XO
> 
> Hi
> 
> I have had no problem using the PPS out of any of the Lucent boxes. They trigger counters fine and a one shot stretches them to any length you might need.
> 
> Bob
> 
>> On Sep 22, 2016, at 8:31 AM, Bill Riches <bill.riches at verizon.net> wrote:
>> 
>> Be careful of the pps output from the dual lucent boxes.  Tried to use it to sync SL and found that it is a weird non-standard pulse and would not work even with a pulse stretcher as it looked too narrow.  I use the pps output from a Jackson unit and it syncs SL fine.
>> 
>> 73,
>> 
>> Bill, WA2DVU
>> Cape May
>> 
>> -----Original Message-----
>> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Hal 
>> Murray
>> Sent: Thursday, September 22, 2016 2:07 AM
>> To: Discussion of precise time and frequency measurement
>> Cc: hmurray at megapathdsl.net
>> Subject: Re: [time-nuts] Lucent RFTFm-II-XO
>> 
>>> Is there a pinout posted somewhere  for the Lucent box RS422 D sub 9 connector?
>> 
>> It's in the mail archives.  Google for something like >time-nuts RS422 
>> pinout<
>> 
>> If you are interested in timing, you want the PPS signal too.  (It 
>> won't be great over USB, but it might be fun to play with.  You can 
>> get your own hanging bridges.)
>> 
>> 
>> 
>> --
>> These are my opinions.  I hate spam.
>> 
>> 
>> 
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