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hackrf_sweep: Reduce bin_size_min to 3 kHz

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Using rate limiting, smaller bin sizes than 40 kHz can be used. This is useful
when using the hackrf_sweep backend with narrow frequency ranges.
This commit is contained in:
Michael Lass 2017-03-24 21:28:48 +01:00
parent a49f1a3187
commit bc3319ba82
1 changed files with 6 additions and 5 deletions
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11
qspectrumanalyzer/backends/hackrf_sweep.py
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@ -20,7 +20,7 @@ class Info(BaseInfo):
stop_freq_min = 0 stop_freq_min = 0
stop_freq_max = 7250 stop_freq_max = 7250
stop_freq = 6000 stop_freq = 6000
bin_size_min = 40 bin_size_min = 3
bin_size_max = 5000 bin_size_max = 5000
bin_size = 1000 bin_size = 1000
interval = 0 interval = 0
@ -38,10 +38,11 @@ class PowerThread(BasePowerThread):
interval=0.0, gain=40, ppm=0, crop=0, single_shot=False, interval=0.0, gain=40, ppm=0, crop=0, single_shot=False,
device=0, sample_rate=20000000, bandwidth=0, lnb_lo=0): device=0, sample_rate=20000000, bandwidth=0, lnb_lo=0):
"""Setup hackrf_sweep params""" """Setup hackrf_sweep params"""
# theoretically we can support bins smaller than 40 kHz, but it is # Small bin sizes (<40 kHz) are only suitable with an arbitrarily
# unlikely to result in acceptable performance # reduced sweep interval. Bin sizes smaller than 3 kHz showed to be
if bin_size < 40: # infeasible also in these cases.
bin_size = 40 if bin_size < 3:
bin_size = 3
if bin_size > 5000: if bin_size > 5000:
bin_size = 5000 bin_size = 5000