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From: | Li Mei-Wen |
Subject: | RE: [Discuss-gnuradio] Help: about ./benchmark_rx.py |
Date: | Mon, 18 Jan 2010 22:59:24 +0800 |
> Sorry, but your question is not very clear. It's a wireless modem, which > means it's subject to all sorts of issues that are dependent on your > setup and parameters. > > The best thing to do is to start simple and use usrp_fft.py to see if > you can observe any signal at the receiver and that the signal has a > good SNR. If you have the qtgui package installed with GNU Radio, you > can also try to use benchmark_qt_rx.py which will show you the received > signal and the baseband symbols (so you can look at the constellation). > > Tom Dear Tom I can observe signal when I use usrp_fft.py. But, How to know the SNR is good SNR? When I use TVRX the signal very was clear, but the BasicTX was not. In fact, I can use two RFX900 daughterborads to do the ./benchmark_tx.py -f 900M and ./benchmark_rx.py -f 900M. I think that's becasue they have same frequency range (750 to 1050 MHz). But, if I use the BasicTX and TVRX to do ./benchmark_tx.py -f 100M and ./benchmark_rx.py -f 100M, I can't run if. Because they have different freqency range? TVRX daughterborad is 50 MHz to 860 MHz Receiver BasicTX daughterborad is 1 MHz to 250 MHz Transmitter Or because antenna ? I buy the BasicTX, but not include antenna, so I use RFS900's antenna instead it. The result was TVRX can receive FM channel, But BasicTX can't send signal.. Thanks in advance. > Date: Mon, 18 Jan 2010 09:03:04 -0500 > From: address@hidden > To: address@hidden > CC: address@hidden > Subject: Re: [Discuss-gnuradio] Help: about ./benchmark_rx.py > > Li Mei-Wen wrote: > > Hi: > > > > I want to try my daughterborad basic_TX and TV_RX. > > I try to use ./benchmark_tx.py -f 100M and ./benchmark_rx.py -f 100M > > Only the ./benchmark_tx.py can run, The ./benchmark_rx.py can't > > receive any signal. > > So, what's wrong about this? How can I do? > > > > Thanks in advance. > > > > > > *Mei-Wen Li (Emily) > > address@hidden > > > Windows 7:找出適合您的電腦。 深入了解。 |
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