Re: [Discuss-gnuradio] DBS-RX satellite connection

[Martin DvH]

On Sat, 2009-06-06 at 21:57 -0700, Eric Blossom wrote:
> On Sat, Jun 06, 2009 at 02:30:05AM -0400, davek wrote:
> > I would like to get my usrp conneced to my TVRO satellite dish. I am
> > wondering...
> > Is the DBSRX daughter card suitable for direct connection to a satellite 
> > LNB?
> 
> Yes.
> 
> > I am thinking it will be easier to let the sat receiver do the lnb
> > power and polarization control
> > Is it be safe to connect to the lnb loop-through connection on
> > standard satellite receivers?
> 
> I don't know.
> 
I have done that in the past and it worked fine.
(I did analog satelite TV reception which is FM modulated.
I just switched the AM-demod block in usrp_tv_receive.py for a
quadrature-demod block (=FM demodulator) and reduced decimation and got
an image. You get some distortion because you can't get the complete
bandwidth of a sattelite channel usring a USRP-1. (Best I got was 16 MHz
using 8 bits/sample and decimation 4 )

Using the sat-receiver for power and polarisation is very conveniant.
You can use the remote to switch polarisation.

Greetings,
Martin

> Eric
> 
> 
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