[amsat-bb] Linear Transponder Up and Down link frequency calculator

[Hasan al-Basri]

Two other points. There is a 1200 Hz error on CAS-4A....a few hundred Hz is
predictable, but I think an additional 1000 Hz may have crept in there, so
check your calcs.

Notice all others are no more than a few hundred Hz...which is as it should
be.

The reference freq are for USB, perfect voice tone and fully doppler
corrected.  The Rx are FunCube Pro+ SDRs, that have been calibrated to
within 0.356 Hz @ 10 MHz and checked against 6 meters to be accurate within
3 Hz. (Compared to GPS Discipline Oscillator)

73, N0AN
Hasan


On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> Hi Folks,
>
> With the number of Linear Transponder Satellites that are operational or
> in the pipeline,
> I thought a simple program to convert uplink to downlink frequencies was
> worth writing.
> I’ve written one for Windows.
> You can find it here:
> https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0
> I’ve put the exe file and the same file in zip format.
> I have put all the current birds plus the ones that have launches pending.
> Just select the satellite of interest from the “Satellite” drop down menu,
> put your frequency into the text box and hit the Up or Dn calculate button.
>
> Let me know if you think this is useful.
>
> 73,
> Terry Osborne ZL2BAC
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