Re: [Discuss-gnuradio] USRP2 benchmark_rx.py, benchmark_tx.py, transmit_path_usrp2.py, receive_path_usrp2.py, pick_bitrate.py

[Smith L.]

Hi,

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.

Smith


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
>> rate
>> 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
>> receive
>> 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.
> 
> Eric
> 
> 
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> 

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