diff options
Diffstat (limited to 'gr-analog/python/analog/nbfm_tx.py')
| -rw-r--r-- | gr-analog/python/analog/nbfm_tx.py | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gr-analog/python/analog/nbfm_tx.py b/gr-analog/python/analog/nbfm_tx.py index ffd539ec55..aa6c1eccc7 100644 --- a/gr-analog/python/analog/nbfm_tx.py +++ b/gr-analog/python/analog/nbfm_tx.py @@ -29,7 +29,7 @@ except ImportError: import analog_swig as analog class nbfm_tx(gr.hier_block2): - def __init__(self, audio_rate, quad_rate, tau=75e-6, max_dev=5e3): + def __init__(self, audio_rate, quad_rate, tau=75e-6, max_dev=5e3, fh=-1.0): """ Narrow Band FM Transmitter. @@ -41,6 +41,7 @@ class nbfm_tx(gr.hier_block2): quad_rate: sample rate of output stream (integer) tau: preemphasis time constant (default 75e-6) (float) max_dev: maximum deviation in Hz (default 5e3) (float) + fh: high frequency at which to flatten preemphasis; < 0 means default of 0.925*quad_rate/2.0 (float) quad_rate must be an integer multiple of audio_rate. """ @@ -71,7 +72,7 @@ class nbfm_tx(gr.hier_block2): #print "len(interp_taps) =", len(interp_taps) self.interpolator = filter.interp_fir_filter_fff (interp_factor, interp_taps) - self.preemph = fm_preemph(quad_rate, tau=tau) + self.preemph = fm_preemph(quad_rate, tau=tau, fh=fh) k = 2 * math.pi * max_dev / quad_rate self.modulator = analog.frequency_modulator_fc(k) |