Re: [Discuss-gnuradio] Re: problem with tvrx , wbx and AO-51.

[Patrik Tast]

Hi All,

I just recorded a 30 degree AO-51 pass over Western Finland using a 1.2 m 
RCP Yagi, USRP1, TVRX and TV pre-amp 
http://www.vekoy.com/product_info.php?cPath=85_402&products_id=12828

Audio file is located at http://noaaport.poes-weather.com:8081/AO-51/
At 1745Z Tuesday 8th next AO-51 pass will be 70 degrees, I'll record that 
one also.

Don't hesitate to ask questions,
Patrik


----- Original Message ----- 
From: "Patirck Strasser" <address@hidden>
To: <address@hidden>
Sent: Tuesday, June 08, 2010 12:50
Subject: [Discuss-gnuradio] Re: problem with tvrx , wbx and AO-51.


> schrieb naveen nischal am 2010-06-04 23:49:
> > Hi,
> >
> > I have recently got into doing the SDR, i have been using the both the
> > tvrx and wbx daughter boards for communicating with the ham radio at
> > 435.300Mhz. I am not too good at python so i use GRC. However when i try
> > to receive from the voice from the AO-51 satellite at the same 435.3Mhz
> > frequency i dont get anything. Any comments or suggestions are 
> > appreciated.
>
> Please take a look at
> http://www.amsat.org/amsat-new/satellites/status.php
>
> AO51 seems to work as a repeater/transverter, it never resends the input 
> at the same frequency/band. Very common is to have the uplink on 2m=145MHz 
> and the downlink on 70cm=435MHz. This is called V/U-mode. You can find 
> details and the current status at the link above.
>
> Please also take Doppler shift into account, this is not big show-stopper 
> at FM, but be prepared to retune sometimes. You will see the Doppler shift 
> if you use a waterfall display.
>
> The easiest to start is to listen first. It's very probable that you will 
> hear some conversation during a pass.
>
> Patrick
> --
> Engineers motto: cheap, good, fast: choose any two
> QTH: JN77rb
> Patrick Strasser OE6PSE <oe6pse at wirklich priv at>
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio