diff options
Diffstat (limited to 'apps/grgsm_scanner')
| -rwxr-xr-x | apps/grgsm_scanner | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/apps/grgsm_scanner b/apps/grgsm_scanner index 1688310..3913713 100755 --- a/apps/grgsm_scanner +++ b/apps/grgsm_scanner @@ -198,7 +198,7 @@ class wideband_receiver(grgsm.hier_block): class wideband_scanner(gr.top_block): - def __init__(self, rec_len=3, sample_rate=2e6, carrier_frequency=939e6, ppm=0, args=""): + def __init__(self, rec_len=3, sample_rate=2e6, carrier_frequency=939e6, gain=24, ppm=0, args=""): gr.top_block.__init__(self, "Wideband Scanner") self.rec_len = rec_len @@ -209,7 +209,7 @@ class wideband_scanner(gr.top_block): # if no file name is given process data from rtl_sdr source print "Args=", args self.rtlsdr_source = osmosdr.source(args="numchan=" + str(1) + " " + args) - + self.rtlsdr_source.set_min_output_buffer(int(sample_rate*rec_len)) self.rtlsdr_source.set_sample_rate(sample_rate) # capture half of GSM channel lower than channel center (-0.1MHz) @@ -226,7 +226,9 @@ class wideband_scanner(gr.top_block): self.rtlsdr_source.set_iq_balance_mode(0, 0) self.rtlsdr_source.set_gain_mode(True, 0) self.rtlsdr_source.set_bandwidth(sample_rate, 0) - + self.rtlsdr_source.set_gain(gain, 0) + self.rtlsdr_source.set_if_gain(32, 0) + self.rtlsdr_source.set_bb_gain(30, 0) self.head = blocks.head(gr.sizeof_gr_complex * 1, int(rec_len * sample_rate)) # shift again by -0.1MHz in order to align channel center in 0Hz @@ -349,7 +351,7 @@ if __name__ == '__main__': scanner = wideband_scanner(rec_len=6 - options.speed, sample_rate=options.samp_rate, carrier_frequency=current_freq, - ppm=options.ppm, args=options.args) + ppm=options.ppm, gain=options.gain, args=options.args) # start recording scanner.start() |