[time-nuts] Updated Shera controller
Brooke Clarke
brooke at pacific.net
Thu Jul 29 18:15:04 UTC 2010
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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