[time-nuts] Updated Shera controller

EWKehren at aol.com EWKehren at aol.com
Thu Jul 29 13:55:51 EDT 2010


Arnold
Have you actually done it with the PRS10 and what was the result?
Bert
 
 
In a message dated 7/29/2010 1:52:08 P.M. Eastern Daylight Time,  
arnold.tibus at gmx.de writes:

No  problem for the PRS10 - there is an external pps input.

For the FRK-RbO  I don't have a practical solution yet,
because I don't have a manual with  circuit diagram found
for this 5 MHz model. This RbO is actually running  free,
drift controlled by an external resistor set by two 10  turns
potentiometers. I think it should be possible to inject a
current  instead. The control by eg. the Shera controller
need some modifs for this  purpose which I have not yet done.
The time constant need to be modified  too I think.

Arnold

Am 29.07.2010 18:09, schrieb  EWKehren at aol.com:
> Arnold
> how are you controlling the Rb with  the Tbolt?   Bert
>  
>  
> In a message  dated 7/29/2010 11:10:16 A.M. Eastern Daylight Time,  
>  arnold.tibus at gmx.de writes:
> 
> Bert,
> I'm using at the  moment a thunderbolt (with spare for  testpurposes
> using ext.  other oscillators), a nice PRS10, a FRK-HLN-1A  (5MHz with
>  external doubler to 10 MHz) and several HP10811.
> I would like  to  build up with this a good and reliable reference
> (PPS and Frequ.).  My  dream would be a good autonom. TIC with timestamp
>  possibility. At the  moment the 53132A is doing a good job, but I  miss
> the time stamp  possibility and single measurements at  defined time  
> steps...
> regards
>  Arnold,DK2WT
> 
> 
> Am 29.07.2010 13:50, schrieb   EWKehren at aol.com:
>> Arnold
>>  what do you use?   Bert  Kehren
>>  
>>  
>> In a  message dated 7/29/2010  7:02:06 A.M. Eastern Daylight Time,   
>> arnold.tibus at gmx.de  writes:
>>
>> I  do,  and I am also interested on other    improvements!
>>
>> Regards,
>>  Arnold
>>
>>  
>> Am 29.07.2010 12:49,   schrieb EWKehren at aol.com:
>>>  Hi
>>> I think it  would be nice to have  a show of hands as to  how many are  
>> locking 
>>>  a Rb to GPS and what    they  use. 
>>> Bert Kehren
>>>   
>>>   
>>> In  a message dated  7/29/2010 4:00:31 A.M. Eastern Daylight  Time,   
>>>  phk at phk.freebsd.dk   writes:
>>>
>>> In  message    <60EB5E7C69594F49B830463DC322EDB4 at athlon>, "Ulrich 
>  Bangert"   
>>  
>>>  writes:
>>>>> Uhm, isn't this  exactly where you want  to use  the  
>>>>>   still-smelling-like-brand-new-car PICTIC II with a  good DAC    
>>>>> and a microcontroller    ?
>>>>
>>>> I guess the PICTIC II is  not  very good  when  stop pulses arrive 
> BEFORE 
>>>  start
>>>> pulses  which is a   normal condition  if a average time interval of  
> zero
>>>> between  local  pps  and GPS pps is the   aim.
>>>
>>> So configure it to use a  standard  offset of  one  Xtal/Rb period  ?
>>>
>>>  
>>  
>  

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