[time-nuts] Building a GPSDO & trouble using Jupiter-T

[Bruce Griffiths]

The 100PPS output from Motorola receivers is phase jerked every second 
in the same fashion.

Bruce

Azelio Boriani wrote:
> OK, now I know and wonder if other GPS receivers that have frequency
> outputs behave in this manner. For example the Motorola 100PPS output, the
> uBlox 800Hz, the Navsync variable frequency output and so on. It is
> possible to compute solutions from GPS satellite at greater than 1 second
> rate so the phase of these signals should be adjustable at a rate that
> could minimize the phase jump... this is only my opinion, not the real
> possibility.
>
> On Mon, Jan 30, 2012 at 11:15 AM, Bruce Griffiths<
> bruce.griffiths at xtra.co.nz>  wrote:
>
>    
>> The 10kHz is continuous but its phase jerked on the second.
>> The new phase is held until the next jerk.
>>
>> Bruce
>>
>>
>> Azelio Boriani wrote:
>>
>>      
>>> Ah, is it a burst of 10KHz once a second? I don't have a Jupiter-T and I'm
>>> a PPS-type discplining fan but I thought it was a continuous 10KHz.
>>>
>>> On Mon, Jan 30, 2012 at 10:33 AM, Attila Kinali<attila at kinali.ch>   wrote:
>>>
>>>
>>>
>>>        
>>>> On Sun, 29 Jan 2012 00:50:35 -0600
>>>> Ray Xu<rayxu123 at gmail.com>   wrote:
>>>>
>>>>
>>>>
>>>>          
>>>>> For those who have experience using the Jupiter T GPS:
>>>>> I have bought this
>>>>>
>>>>>
>>>>>
>>>>>            
>>>> http://www.ebay.com/itm/**Navman-jupiter-T-Tu60-GPS-Kit-**
>>>> 1pps-10khz-GPS-Module-/**260790984470<http://www.ebay.com/itm/Navman-jupiter-T-Tu60-GPS-Kit-1pps-10khz-GPS-Module-/260790984470>
>>>>
>>>> Ouch... For that price you get already a new LEA-6T, which is a state of
>>>> the art timing GPS receiver. Beside having the better sensitivity
>>>> (more satelites in difficult conditions) it features also an frequency
>>>> output that can go up to 10MHz (or 8MHz if you want low jitter).
>>>>
>>>>
>>>>                         Attila Kinali
>>>> --
>>>> The trouble with you, Shev, is you don't say anything until you've saved
>>>> up a whole truckload of damned heavy brick arguments and then you dump
>>>> them all out and never look at the bleeding body mangled beneath the heap
>>>>                 -- Tirin, The Dispossessed, U. Le Guin
>>>>
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