[Top][All Lists]

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

Re: [Discuss-gnuradio] USRP2 benchmark_rx.py, benchmark_tx.py, transmit_

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] USRP2 benchmark_rx.py, benchmark_tx.py, transmit_path_usrp2.py, receive_path_usrp2.py, pick_bitrate.py
Date: Mon, 20 Apr 2009 16:02:06 -0700
User-agent: Thunderbird (X11/20090320)

The DAC rate is 100e6. The "bitrate" is the desired data rate of the over the air modulation. It should be MUCH less, like 100k to 1M or so.

There is absolutely nothing in any of the systems for which 200e6 is a correct choice.


Smith L. wrote:

I already tried to set the value of the converter_rate in pick_tx_bitrate
and Pick_rx_bitrate according to the ADC and DAC specifications of 
address@hidden I
set it to 200e6 in pick_tx_bitrate and in pick_rx_bitrate. But even that did
not worked. I am confused with how to modify the pick_bitrate.py file for
usrp2. I am not able to determine the different parameters that I need to
provide for usrp2. If anyone has already worked on it then please help me to
modify the pick_bitrate file for usrp2. Also if any other changes are
required in other python files.

Thanks in advance.


Eric Blossom wrote:
On Fri, Apr 17, 2009 at 11:24:00AM -0700, Smith L. wrote:

I am using the same pick_bitrate.py file that is already provided in
gnuradio. As it can be seen that both usrp systems have the default bit
irrespective of whether it acts as receiver or transmitter. My concern is
with the interpolation and decimation. Do I need to make changes to the
pick_bitrate.py file for USRP2? If yes, then what kind of changes. I also
observed that even though USRP2 shows a bit rate of 500kbps, however I
believe that its transmitting too fast which does not allow USRP1 to
correctly.I would greatly appreciate any help in this matter.
At a minimum, you will need to call pick_tx_bitrate and
pick_rx_bitrate providing proper rates for the ADC and DAC.  They
default to the values appropriate for the USRP1.  However, it looks
like you'll need a USRP2 version since they encode the acceptable
ranges for interpolation and decimation which are different between
the USRP1 and USRP2.


Discuss-gnuradio mailing list

reply via email to

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