Fw: Re: problem with tvrx , wbx and AO-51

GNU Radio
#1

— On Mon, 7/6/10, naveen nischal [email protected] wrote:

From: naveen nischal [email protected]
Subject: Fw: Re: [Discuss-gnuradio] problem with tvrx , wbx and AO-51.
To: [email protected]
Date: Monday, 7 June, 2010, 10:22 PM

— On Mon, 7/6/10, naveen nischal [email protected] wrote:

From: naveen nischal [email protected]
Subject: Re: [Discuss-gnuradio] problem with tvrx , wbx and AO-51.
To: “Patrik T.” [email protected]
Date: Monday, 7 June, 2010, 10:20 PM

Hi Patrik,
Thanks for the reply. I have been using the usrp_wbfm_rcv.py receiver
found in the examples directory. and the antenna is a YA450-14.7-24 i
have attached a picture of the antenna.Should I be using a broadband
preamp or can i do without it?Do you find any  problem with what i have
been doing?
Thanks & Regards,Naveen.
— On Sat, 5/6/10, Patrik T. [email protected] wrote:

From: Patrik T. [email protected]
Subject: Re: [Discuss-gnuradio] problem with tvrx , wbx and AO-51.
To: “naveen nischal” [email protected],
[email protected]
Date: Saturday, 5 June, 2010, 1:48 PM



Hi Naveen,
Â
Which receiver are you using? I use the usrp_nbfm_rcv.py
receiver found in the examples directory
It seems to be transmitting at the moment @ 435.300
MHz, http://www.amsat.org/amsat-new/echo/CTNews.php
Â
What antenna are you using?
Â
Sample received AO-51 using USRP and TVRX + broadband (TV)
preamp http://www.poes-weather.com/~patrik/AO-51/
Â
Patrik
Â

----- Original Message -----
From:
naveen nischal
To: [email protected]
Sent: Saturday, June 05, 2010 0:49
Subject: [Discuss-gnuradio] problem with
tvrx , wbx and AO-51.

  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.

    Thanks & Regards,
    Naveen

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#2

Hi Naveen,

That antenna(s) should work. If the coax is more than 5 m I recommend
you get a cheap TV pre-amp, ~30 eur.
You should use the narrowband FM receiver and NOT the wideband found in
the examples.

Here is the ECHO linkbudget
http://www.amsat.org/amsat-new/echo/Echo_Linkbudget.php

Just uploaded a new AO-51 recording to
http://noaaport.poes-weather.com:8081/AO-51/

The antenna I use is here http://www.poes-weather.com/~patrik/AO-51/
cost < 15 eur

Patrik

----- Original Message -----
From: naveen nischal
To: [email protected]
Sent: Monday, June 07, 2010 19:53
Subject: Fw: Re: [Discuss-gnuradio] problem with tvrx , wbx and AO-51.

    --- On Mon, 7/6/10, naveen nischal <[email protected]>

wrote:

      From: naveen nischal <[email protected]>
      Subject: Fw: Re: [Discuss-gnuradio] problem with tvrx , wbx

and AO-51.
To: [email protected]
Date: Monday, 7 June, 2010, 10:22 PM

            --- On Mon, 7/6/10, naveen nischal

[email protected] wrote:

              From: naveen nischal <[email protected]>
              Subject: Re: [Discuss-gnuradio] problem with tvrx ,

wbx and AO-51.
To: “Patrik T.” [email protected]
Date: Monday, 7 June, 2010, 10:20 PM

                    Hi Patrik,


                    Thanks for the reply. I have been using the

usrp_wbfm_rcv.py receiver found in the examples directory. and the
antenna is a YA450-14.7-24 i have attached a picture of the antenna.
Should I be using a broadband preamp or can i do
without it?
Do you find any problem with what i have been
doing?

                    Thanks & Regards,
                    Naveen.

                    --- On Sat, 5/6/10, Patrik T.

[email protected] wrote:

                      From: Patrik T. <[email protected]>
                      Subject: Re: [Discuss-gnuradio] problem with

tvrx , wbx and AO-51.
To: “naveen nischal”
[email protected], [email protected]
Date: Saturday, 5 June, 2010, 1:48 PM

                      
                      Hi Naveen,

                      Which receiver are you using? I use the

usrp_nbfm_rcv.py receiver found in the examples directory
It seems to be transmitting at the moment @
435.300 MHz, http://www.amsat.org/amsat-new/echo/CTNews.php

                      What antenna are you using?

                      Sample received AO-51 using USRP and TVRX +

broadband (TV) preamp http://www.poes-weather.com/~patrik/AO-51/

                      Patrik

                        ----- Original Message -----
                        From: naveen nischal
                        To: [email protected]
                        Sent: Saturday, June 05, 2010 0:49
                        Subject: [Discuss-gnuradio] problem with

tvrx , wbx and AO-51.

                            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.

                            Thanks & Regards,
                            Naveen

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