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From: | Eric Blossom |
Subject: | Re: [Discuss-gnuradio] USRP2 benchmark_rx.py, benchmark_tx.py, transmit_path_usrp2.py, receive_path_usrp2.py, pick_bitrate.py |
Date: | Fri, 17 Apr 2009 12:47:26 -0700 |
User-agent: | Mutt/1.5.18 (2008-05-17) |
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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