[time-nuts] Updated Shera controller

[EWKehren at aol.com]

Thank you Brooke
I have only been with this group for a year so I am not aware of all past  
dialog.
 What has been the result driving the PRS10 with an external source  and 
was it a GPS or a Tbolt? I am not trying to be cute but if there is an  
alternative with test data I would like to buy one and compare it with what I  
presently have.
 If I am repetitive I shut up, but the proliferation of Rb's it makes  
sense to lock them to GPS, listening to some new members. To day Rb's are  
cheaper than good OCXO's!
Bert Kehren
 
 
In a message dated 7/29/2010 2:16:01 P.M. Eastern Daylight Time,  
brooke at pacific.net writes:

Hi  Bert:

The PRS10 can use it's external 1 PPS input two ways.
1) as  the input for a GPSDO, or
2) Time Tag (RS-232 command TT) of the input  pulse
http://www.prc68.com/I/PRS10.shtml

Have Fun,

Brooke  Clarke
http://www.PRC68.com


EWKehren at aol.com wrote:
>  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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