wonderful pictures. What NFM settings do you use ? surprisingly I had better results with excessively narrow settings (5 kHz bandpass, 1 kHz cutoff bandwidth) compared to the expected 45 to 50 kHz wide setting expected for this mode. I am leaving mid-september for some remote northern area and would love to take the EZCAP with me to demonstrate satellite reception using lightweight equipment (as opposed to a dedicated receiver + car battery).
JM
----- Mail original ----- De: "Steve Markgraf" steve@steve-m.de À: osmocom-sdr@lists.osmocom.org Envoyé: Vendredi 17 Août 2012 10:36:20 Objet: Re: gr-osmosdr disable RTL2832U AGC ?
Hi,
On 17.08.2012 09:09, friedtj@free.fr wrote:
all my attempts at recording signals from satellites (NOAA POES weather satellites and ISS) have so far failed. For NOAA, I can sometimes get a faint signal, but nothing worth decoding to get a weather map (even with a 25 dB LNA preamp). Now, I have found one web page (cannot remember where) associating the poor receiver sensitivity to the RTL2832U DAGC. I remember seeing on this list that someone had managed to disable this DAGC, but is this functionality avaiable in the gnuradio gr-osmosdr block ?
The DAGC is disabled by default in current librtlsdr, so if you use a recent version you should have no problems. In fact, my reception was fine when I tried it (even without LNA).
See http://rof.li/pic/groundplane/
Regards, Steve