Problems with airspy Bandwidth...

[nikuss7]

hi, i-m trying to receive iridium data but the bandwidth that i obtain is 0... someone could help me?

root@sdr-GL552VW:~/gr-iridium# iridium-extractor -D 4 examples/airspy.conf > output.bits
gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.1.0
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp
[INFO] [UHD] linux; GNU C++ version 9.2.1 20200304; Boost_107100; UHD_3.15.0.0-2build5
-- Using subdev spec '0:0'.
(RF) Gain: 21.0 (Requested 21)
Bandwidth: 0.0 (Requested 10000000)
Warning: Setting antenna to RX
1611582107 | i: 0/s | i_avg: 0/s | q: 0 | q_max: 0 | o: 0/s | ok: 0% | ok: 0/s | ok_avg: 0% | ok: 0 | ok_avg: 0/s | d: 0
[INFO] [UHDSoapyDevice] Using format CF32.
1611582108 | i: 0/s | i_avg: 0/s | q: 0 | q_max: 0 | o: 0/s | ok: 0% | ok: 0/s | ok_avg: 0% | ok: 0 | ok_avg: 0/s | d: 0
1611582109 | i: 0/s | i_avg: 0/s | q: 0 | q_max: 0 | o: 0/s | ok: 0% | ok: 0/s | ok_avg: 0% | ok: 0 | ok_avg: 0/s | d: 0
1611582110 | i: 0/s | i_avg: 0/s | q: 0 | q_max: 0 | o: 0/s | ok: 0% | ok: 0/s | ok_avg: 0% | ok: 0 | ok_avg: 0/s | d: 0

thank you very much

[Sec42]

I don't have an airspy, not sure if I can be of much help on the hardware front. I would suggest general troubleshooting steps to narrow down the problem:

a) try to make a raw recording with your device with center 1.626 and bandwidth of 10Msps.

• osmo_sdr -f 1626000000 -s 10000000 test.cfile

b) inspect the resulting file with inspectrum or similar to check if your SNR was ok and you received any signals

c) run the recording through iridium-extractor

• iridium-extractor -c 1626000000 -f float -r 10000000 --offline -D 4 test.cfile > output.bits