[Discuss-gnuradio] Re: Need help on questions about two switches and two Rx in RFX series daughter boards

2007-07-04 Thread zhifeng chen
Is there anyone who may help to answer my questions below? I will give more detail descriptions if they are unclear. Thanks a lot! 2007/7/3, zhifeng chen <[EMAIL PROTECTED]>: I am wondering why there are two switches in the RFX series daughter from schematics. It seems their purposes is differe

Re: [Discuss-gnuradio] audio card sampling rate problem

2007-07-04 Thread Jiri Pittner
I get an error with that: |jp:/home/jiri/pokusy/gnuradio/examples/python/usrp> ./usrp_wfm_rcv_pll.py -R B -f 98.7e6 -O plughw:0.0 gr_fir_ccf: using SSE gr_fir_fff: using SSE gr_fir_fcc: using SSE ALSA lib pcm_hw.c:1351:(_snd_pcm_hw_open) Invalid value for card audio_alsa_sink[plughw:0.0]: No s

[Discuss-gnuradio] Minimum signal level to ADC

2007-07-04 Thread Angilberto Muniz Sb
Is there a way or method to calculate (find) the minimum signal level to input into the ADC? I mean, if I decide to build or interface a custom RF board, how much gain should I provide in the analog path, assuming a 500nV at the antenna terminal? Thank you, Angilberto.

Re: [Discuss-gnuradio] audio card sampling rate problem

2007-07-04 Thread Matt Ettus
Jiri Pittner wrote: > Hi all, > > I have been experienting with gnuradio for some time and I have noticed an > annoying problem > with the audio sampling rate: in the scripts from the example directory it is > set to a hard > value of 32ksamples/s. However, my laptop audio card (or its linux driv

[Discuss-gnuradio] audio card sampling rate problem

2007-07-04 Thread Jiri Pittner
Hi all, I have been experienting with gnuradio for some time and I have noticed an annoying problem with the audio sampling rate: in the scripts from the example directory it is set to a hard value of 32ksamples/s. However, my laptop audio card (or its linux driver) do not support this speed, o

Re: [Discuss-gnuradio] Failed to set TX frequency!!

2007-07-04 Thread Matt Ettus
Eng. Firas wrote: > Hi Johnathan, > > Sorry for not being clear. I was making a new usrp_source.py & usrp_sink.py > files (attached below) to be posted to gunradio. Testing the new > usrp_source.py code was ok for all frequencies and daughter boards. However, > testing usrp_sink.py code, with TX fr

[Discuss-gnuradio] Nerd Salon 7/10 in SF, featuring Matt Ettus

2007-07-04 Thread John Gilmore
Date: Tue, 03 Jul 2007 14:19:53 -0700 From: Annalee Newitz <[EMAIL PROTECTED]> Subject: Reminder: Nerd Salon 7/10 Nerd Salon returns in just one week! Bring your friends and robots and alien lovers! Here are the details: WHEN: Tuesday, July 10, 2007, 6 PM - 9:30 PM WHERE: 111 Minna Gallery, San

Re: [Discuss-gnuradio] Failed to set TX frequency!!

2007-07-04 Thread Eng. Firas
Hi Johnathan, Sorry for not being clear. I was making a new usrp_source.py & usrp_sink.py files (attached below) to be posted to gunradio. Testing the new usrp_source.py code was ok for all frequencies and daughter boards. However, testing usrp_sink.py code, with TX frequencies between 44MHz and

Re: [Discuss-gnuradio] Failed to set TX frequency!!

2007-07-04 Thread Johnathan Corgan
Eng. Firas wrote: > I think there is a problem in setting TX frequency of Basic daughter board > using the USRP "tune" function in the range from (45MHz to 83MHz)!. > Outside this range, the tune function is working fine. You'd have a much higher chance of getting a useful reply if you included

[Discuss-gnuradio] Failed to set TX frequency!!

2007-07-04 Thread Eng. Firas
Hi, I think there is a problem in setting TX frequency of Basic daughter board using the USRP "tune" function in the range from (45MHz to 83MHz)!. Outside this range, the tune function is working fine. Firas -- View this message in context: http://www.nabble.com/Failed-to-set-TX-frequency%21

[Discuss-gnuradio] basic Rx and wire? Quality of TVRX

2007-07-04 Thread Gautam Sharma
Hello everyone, Very new at this with the modest aim of getting an FM receiver up but I have two questions that are simple enough. 1) Considering that we started with the basic Rx and a wire, we were able to hear FM 98.7. This was expected but it is a little sup rising that we can hear this ex

Re: [Discuss-gnuradio] Simultaneous transmission and reception

2007-07-04 Thread pratik hetamsaria
David Scaperoth <[EMAIL PROTECTED]> wrote: On 7/3/07, pratik hetamsaria <[EMAIL PROTECTED]> wrote: Hi Everyone I am currently trying to make a USRP transceiver run, which is based on TDMA approach. As a warning, the USRP and GNU Radio are going to give you some trouble when it comes to

[Discuss-gnuradio] Problems with Mueller & Mueller clock recovery; not very reliable in my system

2007-07-04 Thread Christian Sokolowski
Hi, I have some trouble using the function gr_clock_recovery_mm_cc.cc (Mueller & Mueller Clock recovery). Using DPSK with datarate 40 kbps, the communication system works perfect running a simulation without USRP board. The problem occurs when I switch to the board: when calling/initialising t