# 2.4 Ghz SSB downconverter...

• Subject: [amsat-bb] 2.4 Ghz SSB downconverter...
• From: Stan <stan@xxxxxxxxxxxxxx>
• Date: Wed, 07 Apr 1999 13:20:27 -0400

```> Hello Peter,
>
> I am going in the same direction as you,
> but I am not fully installed yet.
>
> from the latest ANS: PACSAT AO-16, beacon at 2401.1428 Mhz
>                      DOVE DO-17 at 2401.220 but non-operational (kaput)
>                      UO-11, beacon at 2401.500 Mhz
>
> What are the specs on the SSB downconverter ?
> Exactly what mode SSB converter do you have ?
>
> spec should give the conversion, such as 2400.000 Mhz = 144.000 Mhz
> because these block down converter are a linear translation,
> 2401.00 = 145.00 in this example..... RF +1 Mhz = IF +1 Mhz.....
>
> Inject a test signal at 2400.000000 Mhz and look for it
> on the tunable 2M IF or...
>
> look at the local oscillator Xtal and multiply up
> in integer increments till you find the apppropriate low side beat.
>
> ie. if RF is 2,400.000 and IF is 144.000 Mhz then the low side beat
> would be
> 2400.00-144.00 = 2256.00 Mhz or the 24th harmonic of 94.00 Mhz, for
> example.
>
> I do not know the LO multiplier chain of your converter.
>
> Looking at my SSB file:
> UEK2000SAT/01 has a conversion of: 2,400.00 = 144.00 Mhz
> UEK2000S has a conversion of:      2,304.00 = 144.00 Mhz
> UEK2000SAT has a conversion of:    2,400.00 = 144.00 Mhz
UEK-3000-2 fro a 2M IF               2,400.00 = 144.00 Mhz
UEK-3000-70, 70 cm IF                2,400.00 = 432.00 Mhz
>
> Try to measure your LO with a freq counter
> to determine LO freq or Xtal oscillator freq.
>
> I hope this sheds some light.
> What size dish are you using...?
> Vert/Horiz or circular polarization ?
>
> Stan, WA1ECF  Cape Cod, MA   FN41sr
>
> Peter Rogers wrote:
> >
> >         Hi out there, I have put my dish up and the SSB downconverter, now I need
>
> [message truncated]

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