Re: [Discuss-gnuradio] Understanding the interfence environment

2006-09-06 Thread Carlo E. Prelz
Subject: Re: [Discuss-gnuradio] Understanding the interfence environment Date: mer 06 set 06 11:33:24 -0400 Quoting Marcus Leech ([EMAIL PROTECTED]): > There's also usrp_fft.py in gnuradio-examples/python/usrp, which uses > the high-level > interface for set

Re: [Discuss-gnuradio] Understanding the interfence environment

2006-09-06 Thread Marcus Leech
Carlo E. Prelz wrote: The actual code for setting frequency and gain (for daughterboard dbs_rx) is found (in python!) in file /gr-usrp/src/db_dbs_rx.py (methods set_freq and set_gain). The procedure is quite abstruse and I found no text document that would explain in a less terse format what w

Re: [Discuss-gnuradio] Understanding the interfence environment

2006-09-06 Thread Carlo E. Prelz
Subject: Re: [Discuss-gnuradio] Understanding the interfence environment Date: mer 06 set 06 07:56:52 -0400 Quoting Marcus Leech ([EMAIL PROTECTED]): > Roberto Mastrodonato wrote: > >Hi > > > >how can you set frequency and gain? > >10x > >R >

Re: [Discuss-gnuradio] Understanding the interfence environment

2006-09-06 Thread Marcus Leech
Roberto Mastrodonato wrote: Hi how can you set frequency and gain? 10x R The DBS_RX tunes from around 900Mhz to around 2200Mhz, and also has variable-gain amplifiers, as does the AD9862 A/D chip. There are usrp functions to control this, which I use in my radio astronomy application. ___

Re: [Discuss-gnuradio] Understanding the interfence environment

2006-09-06 Thread Roberto Mastrodonato
Hihow can you set frequency and gain?10xR2006/9/6, Marcus Leech <[EMAIL PROTECTED]>: David I. Emery wrote:>>>   And there are a number of other emitters in that area you might> just have lucked into... (especially some that might show up as images> with a high gain and relatively broadband LNA

Re: [Discuss-gnuradio] Understanding the interfence environment

2006-09-06 Thread Marcus Leech
David I. Emery wrote: And there are a number of other emitters in that area you might just have lucked into... (especially some that might show up as images with a high gain and relatively broadband LNA feeding the DBSRX tuner). I'd not assume C or X band, there are rad

[Discuss-gnuradio] Understanding the interfence environment

2006-09-05 Thread Marcus Leech
I'm trying to understand the interference environment for my application (radio astronomy), using the DBS_RX daughtercard. I've had an ongoing problem with a pulse source getting in via the feed spillover of my 12' dish. I initially thought this was due to the local 5.6Ghz doppler radar de-se