[time-nuts] DS-1 from 10MHz

J.D. Schoedel jdschoedel at verizon.net
Mon Jul 5 02:54:26 UTC 2010


Perhaps.  The DS-1 signal has a pulse-mask which is not square.  And 
while the all "1"s AMI signal looks like 772 kHz, presumably the  D4 or 
ESF frame would require some zero's in the 193d bit position.  But your 
suggestion leads to a possible 2 stage solution.  There are CSU/DSUs 
which accept an external TTL level clock.  So perhaps use the tapr board 
to drive the CSU/DSU and let the CSU/DSU build the DS-1 frame.
Thanks,
J.D.

Poul-Henning Kamp wrote:
> In message <97416.58969.qm at web30303.mail.mud.yahoo.com>, Stanley Reynolds write
> s:
>
> Couldn't you do the same thing much easier with the ICS525 chip ?
>
> Neat and convenient:
>
> 	http://tapr.org/kits_clock-block.html
>
> Poul-Henning
>
>
>   
>> I have a board that does this, I could send you.
>>
>> See Pictures here:
>>
>> www.n4iqt.com/fts4040/ds1
>> =A0
>> www.n4iqt.com/fts4040/ds1/FTSds1001.JPG
>>
>> www.n4iqt.com/fts4040/ds1/FTSds1002.JPG
>>
>> www.n4iqt.com/fts4040/ds1/FTSds1003.JPG
>>
>> Stanley
>>
>>
>>
>> ----- Original Message ----
>> From: J.D. Schoedel <jdschoedel at verizon.net>
>> To: Discussion of precise time and frequency measurement <time-nuts at febo.co=
>> m>
>> Sent: Sun, July 4, 2010 11:57:44 AM
>> Subject: [time-nuts] DS-1 from 10MHz
>>
>> All,
>> =A0 I would like to generate a DS-1 timing reference from 10 MHz, e.g a T-b=
>> olt.=A0 =
>>
>> Thought someone here might be able to suggest a starting point.
>> Thanks,
>> J.D.
>>
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>>     
>
>   




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