Narrowband Tunnel.py Error

GNU Radio
1

I am currently running GNU Radio 3.7.4 and I am getting an error running
the stock narrowband tunnel.py script. This is what I am getting:

[root@cobra narrowband]# ./tunnel.py -f 146.0M -a addr=“10.2.8.104”
linux; GNU C++ version 4.4.7 20120313 (Red Hat 4.4.7-4); Boost_104100;
UHD_003.007.001-64-g92b0b7ab

Using Volk machine: sse4_2_64
– Opening a USRP2/N-Series device…
– Current recv frame size: 1472 bytes
– Current send frame size: 1472 bytes

UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 5000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000

UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 5000000 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
– Detecting internal GPSDO… Found an internal GPSDO
– found
– Setting references to the internal GPSDO
– Initializing time to the internal GPSDO

No gain specified.
Setting gain to 19.000000 (from [0.000000, 38.000000])
Traceback (most recent call last):
File “./tunnel.py”, line 296, in
main()
File “./tunnel.py”, line 259, in main
options)
File “./tunnel.py”, line 103, in init
options.verbose)
File
“/home/fox/Documents/GNU_radio/Cranial/narrowband/uhd_interface.py”,
line 199, in init
freq, lo_offset, gain, spec, antenna, clock_source)
File
“/home/fox/Documents/GNU_radio/Cranial/narrowband/uhd_interface.py”,
line 70, in init
self._freq = self.set_freq(freq, lo_offset)
File
“/home/fox/Documents/GNU_radio/Cranial/narrowband/uhd_interface.py”,
line 120, in set_freq
r = self.u.set_center_freq(uhd.tune_request(freq, lo_offset))
File
“/usr/local/lib64/python2.6/site-packages/gnuradio/uhd/init.py”,
line 52, in init
super(tune_request_t, self).init(*args)
File
“/usr/local/lib64/python2.6/site-packages/gnuradio/uhd/uhd_swig.py”,
line 792, in init
this = _uhd_swig.new_tune_request_t(*args)
NotImplementedError: Wrong number of arguments for overloaded function
‘new_tune_request_t’.
Possible C/C++ prototypes are:
uhd::tune_request_t(double)
uhd::tune_request_t(double,double)

I am not too sure what to do, I have looked up the error but I couldn’t
find a solution. Anyone know what to do? Also, the benchmark scripts
work,
it is just the tunnel script that doesn’t.

Thanks

Jonathan

2

Try adding ‘–lo-offset=10e6’ as a commandline argument. Thanks for the
bug report, I’ll push a fix asap.

FYI, the tunnel.py script has been superseded by gr-mac:

Mike

–
Mike J. M0MIK BSc MIET
Ettus R. Technical Support
Email: [email protected]
Web: http://ettus.com

On Thu, Jul 24, 2014 at 10:15 PM, Jonathan F.
[email protected]

3

Thanks for the response.

A colleague of mine recommended going into the uhd_interface file and
change the self.u.set_center_freq() and not use the lo_offset as a
parameter. Then again it couldn’t hurt to just add the command line
argument.

Thank you for the gr-mac link, it is within my interests to use it.

Jonathan

On Thu, Jul 24, 2014 at 7:09 PM, Mike J. [email protected]

4

On Fri, Jul 25, 2014 at 1:13 PM, Tom R. [email protected] wrote:

Thank you for the gr-mac link, it is within my interests to use it.

Using Volk machine: sse4_2_64

“/home/fox/Documents/GNU_radio/Cranial/narrowband/uhd_interface.py”, line
File
uhd::tune_request_t(double)

Discuss-gnuradio Info Page

I did try the --lo-offset=10e6 argument and it didn’t work. I may just
have
to tweak the self.u.set_center_freq to not have the uhd.tune_request
because it doesn’t work just as
self.u.set_center_freq(uhd.tune_request(freq)).

I know the latest version of GNU Radio has a burst tagger block, so is
the
gr-mac project already incorporated?

5

On Thu, Jul 24, 2014 at 7:42 PM, Jonathan F.
[email protected]
wrote:

Best to focus on using gr-mac. Getting started with it might be a bit
difficult, but it’s far superior to tunnel.py and where we want to go,
anyways. GNU Radio will hopefully be adopting this in the future, too,
and
removing tunnel.py.

Tom

6

On Fri, Jul 25, 2014 at 4:28 PM, Jonathan F.
[email protected]
wrote:

argument.

Web: http://ettus.com

UHD_003.007.001-64-g92b0b7ab
See the transport application notes on buffer resizing.
– Setting references to the internal GPSDO
options.verbose)
120, in set_freq
‘new_tune_request_t’.
Jonathan

I did try the --lo-offset=10e6 argument and it didn’t work. I may just
have to tweak the self.u.set_center_freq to not have the uhd.tune_request
because it doesn’t work just as
self.u.set_center_freq(uhd.tune_request(freq)).

I know the latest version of GNU Radio has a burst tagger block, so is the
gr-mac project already incorporated?

No. As I said, we will hopefully be adopting it in the future, but it is
still a separate project. And the burst tagger block has been in GNU
Radio
for quite some time.

Tom