[time-nuts] Re: Regarding RAPCO 2804 (Pendulum 2804)...

[Björn]

Sorry my units are Rapco 1804M. Don’t know how similar that is to 2804.

Sent from my Phone

> On 3 Jun 2023, at 12:18, Björn <bg at lysator.liu.se> wrote:
> 
> I would assume it is TSIP and not NMEA involved here.
> 
> Ulf, I have one and probably another working unit. Would you have use for a working unit to compare with? Rapco branded.  You based at the salty front side of Svedala?
> 
> /Björn 
> 
> 
> Sent from my Phone
> 
>> On 3 Jun 2023, at 00:22, paul swed via time-nuts <time-nuts at lists.febo.com> wrote:
>> 
>> Ulf
>> A consideration. When a ublox starts up the communications parameters
>> contain the Ublox messages not just NEMA.
>> Also the baud rate and parity and bit length may be wrong. You should be
>> able to sniff the old low sensitivity receiver to see what messages its
>> putting out and the other parameters and then try matching.
>> Good luck looks like a neat restoration.
>> Regards
>> Paul
>> WB8TSL
>> 
>>> On Fri, Jun 2, 2023 at 4:17 PM Ulf Kylenfall via time-nuts <
>>> time-nuts at lists.febo.com> wrote:
>>> 
>>> 
>>> A big thank you for providing the manual !
>>> I began troubleshooting a few days ago. The OCXO is OK.The GPS module
>>> (Trimble 52830) seems to have low sensitivity asit can detect only a one or
>>> two satellites. I tried replacing it with a uBlox unitwith an identical
>>> footprint but the communication parametersdoes not match which stopped any
>>> further attempts so I put
>>> the clock aside but with the manual, I can now proceed.
>>> The indicated fault was "Erroneous lock +/- 5Hz".
>>> 
>>> -5 Hz is when the DAC is at 0.2V output. It is a paralell loaded AD7846
>>> 
>>> V e r y expenceive from distributors but several are availableon eBay at
>>> acceptable prices. I have to rule out the GPS modulebefore any further
>>> decisions.
>>> Once again: Thanks!
>>> Best Regards
>>> Ulf Kylenfall
>>> 
>>> 
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at lists.febo.com
>>> To unsubscribe send an email to time-nuts-leave at lists.febo.com
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at lists.febo.com
>> To unsubscribe send an email to time-nuts-leave at lists.febo.com