[time-nuts] Question about specifications for Quartzlock GPS antenna down-converter

bg at lysator.liu.se bg at lysator.liu.se
Sat Mar 14 13:38:43 EDT 2009


Hi Brooke and Russel,

Meinberg does the same thing, but they send a 10MHz - nice choice!! - up
the coax to receive an IF of 35.4MHz.

    http://www.meinberg.de/english/products/gpsant.htm
    http://www.meinberg.de/download/docs/manuals/english/gpsant.pdf

--
   Björn


> Hi Russell:

> I have a similar problem with a Quantic Q-5200/SM Timing GPS Receiver.
> The Q5200 sends both +15 Vdc power and a 11.114 MHz reference frequency up
> the cable to the Antenna Module. The Antenna Module receives the
satellite L1
> frequency and down converts the signal to an IF of 153.028 MHz which is
> sent down the cable to the receiver.
>
> I have tabulated the frequency and other info for a number of the GPS
> signals
> at:  http://www.prc68.com/I/DAGR.shtml#GPSs
>
> In this case L1 = 1575.42 which is 154 * 10.23
>
> Without the proper antenna the receiver can not operate.
> http://www.prc68.com/I/Q5200.shtml
> Have Fun,
>
> Brooke Clarke
> http://www.prc68.com
>
> Russell Rezaian wrote:
>> Hi all,
>>
>> I have found myself with a GPS clock that is labeled as requiring a
>> GPS down converter antenna.  It won't sync to any of my normal
>> antennas.  Looks like it has an up-converter integrated into the
>> receiver directly.
>>
>> So far so good.  I think I may have found an antenna with a built in
>> down-converter, so we'll see how well that works.
>>
>> However, in addition, I just happen to have a Quartzlock GPS antenna
>> down converter sitting in my office at work which I have never used
>> personally.  It was handed to me a while back by someone who knows I
>> am interested in such things.
>>
>> Now I have no specs for this little grey box.  It uses an N style
>> connector for antenna in, and a TNC  connector for signal out.  It's
>> labeled with Quartzlock as the manufacturer, and shows their UK web
>> site.  There's no model number designation I can see.
>>
>> A few web searches have so far failed to show any references to
>> specification documents.
>>
>> So I am not sure what voltages it requires or supports.  There's no
>> external power connection which tends to lead me to suspect that it
>> expects to get power from the RF cables.
>>
>> Has anyone used one of these?  Any pointers to reference information
>> would be appreciated.
>>
>> Thanks!
>> --
>> Russell
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>






More information about the time-nuts mailing list