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Re: [Discuss-gnuradio] Maximum value of samples
From: |
Josh Blum |
Subject: |
Re: [Discuss-gnuradio] Maximum value of samples |
Date: |
Fri, 27 Feb 2009 13:56:47 -0800 |
User-agent: |
Thunderbird 2.0.0.19 (X11/20090105) |
Sebastiaan Heunis wrote:
Hi
Does anyone have an idea as to what the maximum value of a sample when
read in matlab is? I've got a BasicRx board and I'm injecting a 10dBm
signal into RX-A. Using max(abs(sig)) in matlab results in
8.6458e+03. Is this what I should get, or should the maximum reading
be higher?
USRP values are signed 16 bit values, so +/- 32768 range.
Also, can someone quickly tell me about the two inputs on the BasicRx
board. Are they two different channels for sampling two different
signals? If so, how do I get access to both in a Gnuradio app?
They are 2 different antennas for 2 different signals. Or both antennas
can be used in combination for a complex IQ signal.
For usrp_fft.py (side A):
-R A:0 uses the first antenna
-R A:1 uses the second
-R A:2 uses both antennas (IQ)
-Josh
Thank you in advance.
Sebastiaan