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Re: [Discuss-gnuradio] simple transmit questions
From: |
Matt Ettus |
Subject: |
Re: [Discuss-gnuradio] simple transmit questions |
Date: |
Tue, 20 Feb 2007 12:26:25 -0800 |
User-agent: |
Thunderbird 1.5.0.9 (X11/20070104) |
address@hidden wrote:
> First, I assume that you need 2 seperate computers to run 2 USRP boards (1 to
> transmit and 1 to receive). I just wanted to make sure.
>
No, you can have multiple USRPs on one computer. They can be identified
by a unique number programmed into their EEPROMs.
> Second, for a simple transmit using the fm_tx4.py example, how do you change
> the output gain for the transmitting signal. I assume it has to do with the
> line
>
> gain = gr.multiply_const_cc (4000.0 / options.nchannels)
>
>
yes
> but I don't know what the max gain can be set to.
>
>
The max signal output from the computer to the USRP should be
+32767/-32768. However, the RFX boards will clip somewhere lower than that.
Matt