[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Gain Range error

From: Josh Blum
Subject: Re: [Discuss-gnuradio] Gain Range error
Date: Sat, 16 Jan 2010 09:08:54 -0800
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20100115 Shredder/3.0.2pre

On 01/16/2010 01:36 AM, amarnath alapati wrote:
hi friends,
  When I tried to print the Transmitter gain range by the following commands,
The output is as followss,

address@hidden digital]# python benchmark_tx.py -f 2412M
gr_fir_fff: using SSE
Tx Gain Range: minimum = 0, maximum = 0, step size = 1

1) Why is the gain Minimum and Maximum showing the same 0?

The daughter board which you use, has no configurable transmit gain.

2) How to control the transmit power ? Should I use the --amplitude command?

This is the amplitude of the digital samples going into the usrp2 device. You can use higher amplitudes, but be aware that if the amplitude is too high, the samples will clip in the fpga dsp. The maximum is 1.0 (this will clip).

3) can some one breif me on the controlling of transmitter power issue?

Use a mix of digital signal amplitude and programmable hardware gain to control the transmit power within the usrp. In this case of your daughter board, there is no configurable hardware gain


reply via email to

[Prev in Thread] Current Thread [Next in Thread]