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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   SDR gnuradio RTL-SDR x N900 (https://talk.maemo.org/showthread.php?t=91182)

biketool 2013-09-01 18:34
Re: SDR gnuradio RTL-SDR x N900
 
http://www.rtl-sdr.com/wp-content/up...self-View1.jpg
For hams and those who follow HF bands there is this downconverter kit
http://www.easy-kits.com/rtlsdr-for-...onverter-rev-4
It fits inside the dongle enclosure!
This is the Smallest all-band HF receiver in the world, now for the N900.
http://www.rtl-sdr.com/wp-content/up...Opened-Up1.jpg

Estel 2013-09-01 21:25
Re: SDR gnuradio RTL-SDR x N900
 
Awesome and very interesting. Can't wait to see PoF "real world" usage tests (i.e. using such setup - probably, with better antenna ;) as substitute of x or y separate hardware - as PoF, without ergonomic optimizations).

/Estel

xes 2013-09-01 21:46
Re: SDR gnuradio RTL-SDR x N900
 
Well, i hope someone would start trying this kind of setup, sharing opinions and experiences......Maybe also posting here some gnuradio grc file like these examples:

http://superkuh.com/rtlsdr.html

or...why not ...a next generation GNSS positioning system receiver!

http://www.gnss-sdr.org/documentatio...dvb-t-receiver

or...receive NOAA images:
http://www.oz9aec.net/index.php/gnu-...ongle-and-gqrx

We need any feedback/ideas because this could help to do the right choices while engineering .....the new Neo900!
http://talk.maemo.org/showthread.php?t=91142

biketool 2013-09-02 15:08
Re: SDR gnuradio RTL-SDR x N900
 
Xes, projects like this and fldigi are great, and I mean kick@$$ great. The only issue is if you don't send them up to the unstable repos it means that installing and more importantly uninstalling is a super pain unless we take great notes and are sure to clean up our mess when the next version comes out. Even providing the bins with a make install/uniststall would help though I think at that point pushing out a .deb might be easier.
Thanks again for the uber cool work.

xes 2013-09-03 12:48
Re: SDR gnuradio RTL-SDR x N900
 
Quote:
Originally Posted by biketool (Post 1371300)
Xes, projects like this and fldigi are great, and I mean kick@$$ great. The only issue is if you don't send them up to the unstable repos it means that installing and more importantly uninstalling is a super pain unless we take great notes and are sure to clean up our mess when the next version comes out. Even providing the bins with a make install/uniststall would help though I think at that point pushing out a .deb might be easier.
Thanks again for the uber cool work.
You are perfectly right.
But i haven't much free time to prepare debs in a proper way.

Prepare a few deb files that with an automated procedure could damage your system because i have no much time to check how they are working in all situations... is really worst than force who wants to try to use his mind to double check what he is doing.

When all this will be stable and considered useful for the community, i would spend some time to package all the required files.

xes 2013-09-06 15:00
Re: SDR gnuradio RTL-SDR x N900
 
Just updated the first post with new packages based on gnuradio 3.6.5.1 and gqrx 2.1.251.

Have fun!

psychologe 2013-09-09 04:27
Re: SDR gnuradio RTL-SDR x N900
 
OH,this is very cool ,
is it possible to let osmocomBB run on n900?
http://bb.osmocom.org/trac/

joerg_rw 2013-09-09 06:37
Re: SDR gnuradio RTL-SDR x N900
 
Quote:
Originally Posted by psychologe (Post 1373024)
OH,this is very cool ,
is it possible to let osmocomBB run on n900?
http://bb.osmocom.org/trac/
Err probably not. This is strictly about rtl2832 DVB-T USB dongles attached to N900 via H-E-N hostmode, while osmocomBB is for calypso modem chipset afaik. See "compatible phone" link on the page you linked: http://bb.osmocom.org/trac/wiki/Hardware/Phones. N900 has a BB5 modem made by TI(?) for Nokia exclusively, and this modem has signed firmware that you can't replace by osmocomBB even if you knew about the chip's internals.

joerg_rw 2013-09-09 06:43
Re: SDR gnuradio RTL-SDR x N900
 
Quote:
Originally Posted by biketool (Post 1371136)
For hams and those who follow HF bands there is this downconverter kit
http://www.easy-kits.com/rtlsdr-for-...onverter-rev-4
It fits inside the dongle enclosure!
This is the Smallest all-band HF receiver in the world, now for the N900.
AIUI the specs say you get a usb dongle wtih 500kHz..50MHz. I don't see how you can use the original range of the DVB-T dongle which is ~50MHz..2000MHz when the converter got installed. You at least would need a means to switch off and bypass the converter, and unless you do that with a slide switch on the dongle, there's probably no way to do it via USB.
Did I miss something? Did they find a cute way to control the converter e.g. via the IR, LED or other GPIO on rtl2832? Or would I actually need two of those for the full range?

/j

psychologe 2013-09-09 10:04
Re: SDR gnuradio RTL-SDR x N900
 
Quote:
Originally Posted by joerg_rw (Post 1373039)
Err probably not. This is strictly about rtl2832 DVB-T USB dongles attached to N900 via H-E-N hostmode, while osmocomBB is for calypso modem chipset afaik. See "compatible phone" link on the page you linked: http://bb.osmocom.org/trac/wiki/Hardware/Phones. N900 has a BB5 modem made by TI(?) for Nokia exclusively, and this modem has signed firmware that you can't replace by osmocomBB even if you knew about the chip's internals.
thank you reply.
osmocomBB devided into two separate applications:
1,running on the baseband chip of the phone
2,running on a PC, communicating with the baseband firmware over serial

i mean is possible use n900 instead of PC host ,connect "compatible phone" (@@MotorolaC115@@) to N900 via H-E-N hostmode,MotorolaC115. MotorolaC115 run osmocomBB baseband firmware ,and N900 run Firmware management and GSM Layer 2/3 application
sorry ,my bad english ..
http://bb.osmocom.org/trac/wiki/Applications


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