15 Nov
2012
15 Nov
'12
9:11 p.m.
I have gnuradio running with the R820D DVB. Latest GQRX has the nice rf
gain inside which REALLY helps. Has this been merged over to gr-osmosdr ? I
recompiled probably just a few days, both from source.
I'm trying to figure out how to set gain from within gnuradio (is there a
argument I can pass the device in the source block?).
I've been successfully decoding AFSK1200 APRS using gqrx and am trying to
figure out how to set up an ultracheap iGate for APRS, maybe with gnuradio
in the mix.
Also using the OSMOSDR block I still see an LO like spike right in the
middle.
Here's my output starting GQRX. Interesting it's saying gr-osmosdr
supported device types...
ron@tripel:~$ startGqrx.sh
ron@tripel:~$ gr-osmosdr supported device types: file fcd rtl rtl_tcp uhd
>> gr_fir_ccf: using 3DNow!
>> gr_fir_ccc: using 3DNow!Ext
>> gr_fir_fff: using 3DNow!
gr-osmosdr supported device types: file fcd rtl
rtl_tcp uhd
Using device #0: Generic RTL2832U (e.g. hama nano)
Found Rafael Micro R820T tuner
TIA!
-Ron / KB1UMH
15 Nov
15 Nov
9:47 p.m.
Hi,
On 15.11.2012 21:11, Ron Senykoff wrote:
I have gnuradio running with the R820D DVB. Latest
GQRX has the nice rf
gain inside which REALLY helps. Has this been merged over to gr-osmosdr
? I recompiled probably just a few days, both from source.
gqrx uses gr-osmosdr as source block, so it's identical.
I'm trying to figure out how to set gain from
within gnuradio (is there
a argument I can pass the device in the source block?).
Yes, the 'Gain' argument.
Also using the OSMOSDR block I still see an LO like
spike right in the
middle.
gqrx uses an internal DC offset correction algorithm, which you'd need
to implement in your flowgraph as well if you want to remove the
spike.
Regards,
Steve
17 Nov
17 Nov
6:23 p.m.
Sorry I had been looking online for a list of all the arguments, then
smacked my forehead after hitting rtl_fm --help.... not sure if the same
-args apply via gnuradio but I'll see what I can do. I think something I
did has helped as the AGC pumping effect isn't happening to me any more.
Thanks,
-Ron
On Thu, Nov 15, 2012 at 3:47 PM, Steve Markgraf <steve(a)steve-m.de> wrote:
Hi,
On 15.11.2012 21:11, Ron Senykoff wrote:
I have gnuradio running with the R820D DVB.
Latest GQRX has the nice rf
gain inside which REALLY helps. Has this been merged over to gr-osmosdr
? I recompiled probably just a few days, both from source.
gqrx uses gr-osmosdr as source block, so it's identical.
I'm trying to figure out how to set gain from
within gnuradio (is there
a argument I can pass the device in the source block?).
Yes, the 'Gain' argument.
Also using the OSMOSDR block I still see an LO
like spike right in the
middle.
gqrx uses an internal DC offset correction algorithm, which you'd need
to implement in your flowgraph as well if you want to remove the
spike.
Regards,
Steve
4502
days inactive
4504
days old
2 comments
2 participants
participants (2)
-
Ron Senykoff -
Steve Markgraf