[Hackrf-dev] info on GSM

[Srinivasan T]

Dear All,

 

I use HackRF one with telescopic antenna.

I used gr-gsm to see GSM packets but I am not able to.

 

I got following error :

http://imgur.com/U3egNra

 

Attached the video scanning of GSM in Singapore.

https://sendvid.com/gxjm5yrb

 

Please advise me.

 

Regards

 

Srinivasan T

 

-----Original Message-----
From: Cinaed Simson [mailto:cinaed.simson at gmail.com] 
Sent: Monday, 21 December 2015 11:36 AM
To: Srinivasan T; hackrf-dev at greatscottgadgets.com
Subject: Re: [Hackrf-dev] info on GSM

 

On 12/20/2015 03:11 AM, Srinivasan T wrote:

> Hi There,

> 

>  

> telescopic antenna

> I have HackRf with telescopic antenna.

 

If it's ANT500 telescopic antenna it has a frequency of 75-500 MHz - roughly
500 MHz fully collapsed.

> 

> How do I see GSM signals ?

> 

 

My GSM signals were in the 800 MHz band.

 

I picked up a log periodic antenna on Ebay - sold by the guy who gave a
presentation at DEFCON22 on how to choose an antenna

 

 
<http://www.ebay.com/itm/Cellular-Zboost-Log-Periodic-Yagi-Antenna-CANT-0041
-GSM-LTE-Verizon-AT-T-Wilson-/381271094632?hash=item58c5873568:g:VLUAAOxy0zh
TMhWZ>
http://www.ebay.com/itm/Cellular-Zboost-Log-Periodic-Yagi-Antenna-CANT-0041-
GSM-LTE-Verizon-AT-T-Wilson-/381271094632?hash=item58c5873568:g:VLUAAOxy0zhT
MhWZ

 

I use the log periodic antenna indoors. Made a small 24 inch stand out of
PVC pipe and picked up 20 feet of LMR400 cable so I could move it away from
computer equipment and point it in different directions.

 

Then I downloaded gr-gsm from github and installed it on pentoo, and using
gnuradio, fired gr-gsm.

 

> 

> I have seen few videos but all of them using dongle base.

> 

 

They only need 1 MHz of bandwidth - I believe the GSM signal they're looking
at has a bandwidth of around 200 kHz.

 

 

> 

> Please advise.

> 

>  

> 

> Regards

> 

>  

> 

> Srinivasan T

> 

> 

> 

> _______________________________________________

> HackRF-dev mailing list

>  <mailto:HackRF-dev at greatscottgadgets.com>
HackRF-dev at greatscottgadgets.com

>  <https://pairlist9.pair.net/mailman/listinfo/hackrf-dev>
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev

> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist9.pair.net/pipermail/hackrf-dev/attachments/20160209/993e6ae3/attachment.html>