# Reg problem in running gnuradio 3.5 benchmark programs **URL:** \ **Category:** GNU Radio\ **Created:** [February 1, 2012, 2:05am UTC](https://www.ruby-forum.com/t/reg-problem-in-running-gnuradio-3-5-benchmark-programs/216291 "2012-02-01T02:05:59Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\ **Post date:** [February 1, 2012, 2:05am UTC](https://www.ruby-forum.com/t/reg-problem-in-running-gnuradio-3-5-benchmark-programs/216291/1 "2012-02-01T02:05:59Z")
Hi I installed gnuradio 3.5 images in my college lab, and I installed the appropriate SD card image for it. I then tried to run the benchmark programs, by running the benchmark\_tx and rx in two different nodes that have USRP2, with daughter boards, XCVR 2450 in them. But I saw that the benchmark\_rx didnt receive any packets from the node which was running the benchmark\_tx in it. There was a problem of overrun in the node running benchmark\_rx, but still it didnt receive any packets from the node running the transmitter program. Following the advice of tom, we then ran the benchmark\_tx and saw that there were no signal being shown in spectrum analyzer, kept near to the transmitter node. But still the program was showing the dots, indicating that it was sending the packets. Can anyone tell me why this problem occurs and what should I do to resolve it? Thanks – Regards Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutgers University Ph:732-543-6863 Email:removed\_email\_address@domain.invalid ---
**Author:** ![shantharam\_balasubr](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f6c823/32.png) [@shantharam\_balasubr](https://www.ruby-forum.com/u/shantharam_balasubr)\ **Post date:** [February 1, 2012, 3:12am UTC](https://www.ruby-forum.com/t/reg-problem-in-running-gnuradio-3-5-benchmark-programs/216291/2 "2012-02-01T03:12:02Z")
Hi I just want to list down the commands I used to run the benchmark programs. ./benchmark\_tx.py -f 2.4G -r 1M --args “addr=192.168.10.2”. In addition I also gave the option [-A J1] to select the antenna to transmit. But I couldnt detect any transmitted signal from that node. I also ran uhd\_fft in receiver to graphically see if there is any signal getting received. but still couldnt see any. uhd\_fft.py -f 2.4G -s 1M --args “addr=192.168.10.2” It will be of great help if someone can help me out with this. Thanks ---
**Author:** ![shantharam\_balasubr](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f6c823/32.png) [@shantharam\_balasubr](https://www.ruby-forum.com/u/shantharam_balasubr)\ **Post date:** [February 3, 2012, 7:07pm UTC](https://www.ruby-forum.com/t/reg-problem-in-running-gnuradio-3-5-benchmark-programs/216291/3 "2012-02-03T19:07:12Z")
Shantharam - Okay, well if you aren’t seeing a signal on your analyzer, then you definitely aren’t going to receive any packets! 1. What does uhd\_usrp\_probe tell you about your device? 2. Have you tried running the tx\_waveforms example application in UHD to see if you can get a signal out? Cheers, Ben On Tue, Jan 31, 2012 at 6:11 PM, shantharam balasubramanian \<