# Error Running uhd\_tx\_dpsk.grc and uhd\_rx\_dpsk.grc **URL:** \ **Category:** GNU Radio\ **Created:** [July 13, 2012, 10:08am UTC](https://www.ruby-forum.com/t/error-running-uhd-tx-dpsk-grc-and-uhd-rx-dpsk-grc/221418 "2012-07-13T10:08:57Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![aris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/258eb7/32.png) [@aris](https://www.ruby-forum.com/u/aris)\ **Post date:** [July 13, 2012, 10:08am UTC](https://www.ruby-forum.com/t/error-running-uhd-tx-dpsk-grc-and-uhd-rx-dpsk-grc/221418/1 "2012-07-13T10:08:57Z")
Hi everyone, I have just started on GNURadio for an undergraduate project and I would require a little assistance. I tried to run the dpsk transmitter and receiver examples, found in gnuradio/examples/uhd/uhd\_rx\_dpsk.grc and gnuradio/examples/uhd/uhd\_tx\_dpsk.grc. I am using the N210 USRP with the WBX daughterboard and the VERT2450 antenna, with GNURadio version 3.6.0 running on Ubuntu 12.04 LTS. When I run the transmit file, I receive the following error: Traceback (most recent call last): File “/tmp/uhd\_tx\_dpsk.py”, line 234, in tb = uhd\_tx\_dpsk(samp\_rate=options.samp\_rate, freq=options.freq, gain=options.gain, address=options.address) File “/tmp/uhd\_tx\_dpsk.py”, line 150, in **init** log=False) File “/usr/lib/python2.7/dist-packages/gnuradio/digital/qpsk.py”, line 139, in **init** \*args, \*\*kwargs) TypeError: **init** () got an unexpected keyword argument ‘mod\_code’ When I run the receive file, I receive the following error: Traceback (most recent call last): File “/tmp/uhd\_rx\_dpsk.py”, line 327, in tb = uhd\_rx\_dpsk(samp\_rate=options.samp\_rate, freq=options.freq, gain=options.gain, address=options.address, freq\_offset=options.freq\_offset) File “/tmp/uhd\_rx\_dpsk.py”, line 217, in **init** log=False File “/usr/lib/python2.7/dist-packages/gnuradio/digital/qpsk.py”, line 165, in **init** \*args, \*\*kwargs) TypeError: **init** () got an unexpected keyword argument ‘mod\_code’ Both errors look similar and have something to do with “mod\_code”. Does anyone know how to solve it? Also, any suggestions on another GRC receive/transmit example I can use to test out my N210 USRP boards? Thank you very much! ## Tan Chong Min Undergraduate National University of Singapore View this message in context: [http://old.nabble.com/Error-Running-uhd\_tx\_dpsk.grc-and-uhd\_rx\_dpsk.grc-tp34154704p34154704.html](http://old.nabble.com/Error-Running-uhd_tx_dpsk.grc-and-uhd_rx_dpsk.grc-tp34154704p34154704.html) Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![chongmin](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/df705f/32.png) [@chongmin](https://www.ruby-forum.com/u/chongmin)\ **Post date:** [July 13, 2012, 7:12pm UTC](https://www.ruby-forum.com/t/error-running-uhd-tx-dpsk-grc-and-uhd-rx-dpsk-grc/221418/2 "2012-07-13T19:12:24Z")
On 07/13/2012 01:08 AM, chongmin wrote: > on Ubuntu 12.04 LTS. > \*args, \*\*kwargs) > TypeError: **init** () got an unexpected keyword argument ‘mod\_code’ I believe that this grc file has suffered bit rot due to new developments in the code, specifically gr-digital component. I think Tom would know whats missing. > Both errors look similar and have something to do with “mod\_code”. Does > anyone know how to solve it? Also, any suggestions on another GRC > receive/transmit example I can use to test out my N210 USRP boards? Thank > you very much! If you happen to have a spectrum analyzer and signal generator. Its often very nice to make a simple GRC app that sends and receives a test tone. Be careful if you plan to loopback TX into RX port on the daughterboard. Use low gain and lots of attenuation! -josh ---
**Author:** ![chongmin](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/df705f/32.png) [@chongmin](https://www.ruby-forum.com/u/chongmin)\ **Post date:** [July 17, 2012, 7:47am UTC](https://www.ruby-forum.com/t/error-running-uhd-tx-dpsk-grc-and-uhd-rx-dpsk-grc/221418/3 "2012-07-17T07:47:45Z")
Dear Martin and Josh, Thank you for your assistance. I realized the error was that I downloaded a binary which was outdated. After using the build-gnuradio script by Marcus, the error is no longer there. Chong Min chongmin wrote: > running on Ubuntu 12.04 LTS. > \*args, \*\*kwargs) > File “/usr/lib/python2.7/dist-packages/gnuradio/digital/qpsk.py”, line > Undergraduate > National University of Singapore – View this message in context: [http://old.nabble.com/Error-Running-uhd\_tx\_dpsk.grc-and-uhd\_rx\_dpsk.grc-tp34154704p34171805.html](http://old.nabble.com/Error-Running-uhd_tx_dpsk.grc-and-uhd_rx_dpsk.grc-tp34154704p34171805.html) Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![chongmin](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/df705f/32.png) [@chongmin](https://www.ruby-forum.com/u/chongmin)\ **Post date:** [July 16, 2012, 9:06am UTC](https://www.ruby-forum.com/t/error-running-uhd-tx-dpsk-grc-and-uhd-rx-dpsk-grc/221418/4 "2012-07-16T09:06:41Z")
On Fri, Jul 13, 2012 at 01:08:12AM -0700, chongmin wrote: > TypeError: **init** () got an unexpected keyword argument ‘mod\_code’ > Hi chongmin, pull a recent git, it should be fixed there. ## MB Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin B. Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT – University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association