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Re[2]: ao51 mode S tip



Yes! I'd like to be privvy to that also!  Automatic freq tracking is a WONDERFUL thing! :-)
(Especially with a PCR-1000 sitting here... ;-)

73 de Lowell
K9LDW

*********** REPLY SEPARATOR  ***********

On 3/25/2005 at 6:05 PM Cliff Buttschardt wrote:

>Very interesting David regarding the PC-1000 AFC.  You must be using
>one of the aftermarket programs that appeared long after the one ICOM
>shipped with the radio.  What might that be?  I will be most glad to
>duplicate your results!   Cliff K7RR  LM 1606
>
>David Giles wrote:
>> 
>> Hello All,
>> Here's a tip that made my mode S reception easier.
>> Yesterday was my first attempt on mode V/S with my BBQ grill mounted
>> on the Az El rotators.  Previous attempts (all successful) had the
>> antenna on a camera tri-pod - manual tracking and tuning.  The good
>> thing about V/S is I only have to worry about the downlink, the
>> uplink stays fixed.
>> Well, the tracking worked, confirming my antennas are pointing in the
>> right direction.  Signals very loud and QSB quite manageable.
>> 
>> Now here's the tip.  Downlink is a pacific monolithic downconverter
>> with inbuilt dipole and output around 450.2MHz into a PCR-1000.
>> Just for an experiment I turned on the PCR-1000s AFC and lo and behold
>> it tracked the doppler without missing a beat.  Very impressed.
>> For the record, the uplink was <5W into a W4RNL moxon rectangle array.
>> 
>> Now I won't have to worry about the downlink when I (eventually) get
>> to try mode L/S.
>> 
>> 73 de David VK5DG
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