[USRP-users] USRP2 Antenna for 2.4GHz-2.5GHz

Roland Awusie rolandgatsby at gmail.com
Mon Oct 27 00:52:08 EDT 2014


Thank you for your inputs on antenna specifications. I have purchased
VERT2450 antenna and have started sampling spectrum from 2.4-2.5G without
issue.

I will be grateful if anyone can direct me to the best method of saving the
data file for post processing.I planed to use matlab for data plotting.

Note: I'm using Fedora 20 for my setups

Below is an error when saving to my desktop:
2014-10-26 21:24:25.633908 center_freq 131875000.0 freq 136931250.0
power_db 5.13903565433 noise_floor_db -112.39561846
2014-10-26 21:24:25.633951 center_freq 131875000.0 freq 136937500.0
power_db 6.36556793556 noise_floor_db -112.39561846
2014-10-26 21:24:25.634003 center_freq 131875000.0 freq 136943750.0
power_db 6.02607535687 noise_floor_db -112.39561846
2014-10-26 21:24:25.634051 center_freq 131875000.0 freq 136950000.0
power_db 5.87288377969 noise_floor_db -112.39561846
2014-10-26 21:24:25.634095 center_freq 131875000.0 freq 136956250.0
power_db 6.65514846436 noise_floor_db -112.39561846
2014-10-26 21:24:25.634138 center_freq 131875000.0 freq 136962500.0
power_db 5.62646803529 noise_floor_db -112.39561846
2014-10-26 21:24:25.634182 center_freq 131875000.0 freq 136968750.0
power_db 5.3952983101 noise_floor_db -112.39561846
^C[rawusie at localhost uhd]

error in bold:
[rawusie at localhost uhd]$ ./usrp_spectrum_sense.py --args
"addr=192.168.10.3" 25M 230M --fft 1024 > ~/home/rawusie/Desktop/log.txt

*bash: /home/rawusie/home/rawusie/Desktop/log.txt: No such file or
directory*

Thank you,
Roland

On Mon, Oct 13, 2014 at 9:00 PM, Roland Awusie <rolandgatsby at gmail.com>
wrote:

> Hi All,
>
> Thank you all for helping me in this direction. I have decided to order
> two VERT2450 antennas to meet my sampling frequency requirements. Hoping
> all goes well without additional issues.
>
> Thanks,
> Roland
>
> On Tue, Oct 7, 2014 at 12:33 PM, Martin Braun via USRP-users <
> usrp-users at lists.ettus.com> wrote:
>
>> On 10/07/2014 07:17 PM, Michael Schwingen via USRP-users wrote:
>> > On 07.10.2014 17:54, Martin Braun via USRP-users wrote:
>> >> Roland,
>> >>
>> >> the VERT2450 will do both 2.4 and 5 GHz bands, you can get it via our
>> >> web site. You can connect anything with an SMA connector, so if you
>> want
>> >> to go really cheap, you could build your own antenna (see, e.g.
>> >>
>> http://www.makeuseof.com/tag/how-to-make-a-wifi-antenna-out-of-a-pringles-can-nb/
>> ).
>> >>
>> > Not sure if this is a good idea - AFAIR, Oliver Bartels did some
>> > measurements on pringles-based cantennas in the german c't magazine and
>> > came to the result that it worked noticeably worse than a properly sized
>> > waveguide cantenna.
>>
>> That was just a random Google search -- maybe I should have checked it
>> more carefully. What's definitely true is that if money is an issue, you
>> can build an antenna.
>>
>> Have fun, everyone,
>> M
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users at lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>
>
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