better filter bandwidths

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7519 221aa14e-8319-0410-a670-987f0aec2ac5

diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_rx.py b/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_rx.py
index 8a1704000a9882271ba6cf69a21abd299e7ce0ab..dcdd460b550d9cb9797b4b6ffbd27bbe547ae1e8 100644 (file)
--- a/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_rx.py
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/nbfm_rx.py
@@ -75,8 +75,8 @@ class nbfm_rx(gr.hier_block2):
         audio_decim = quad_rate // audio_rate
         audio_taps = gr.firdes.low_pass (1.0,            # gain
                                          quad_rate,      # sampling rate
-                                         4.5e3,          # Audio LPF cutoff
-                                         2.5e3,          # Transition band
+                                         2.7e3,          # Audio LPF cutoff
+                                         0.5e3,          # Transition band
                                          gr.firdes.WIN_HAMMING)  # filter type
 
         print "len(audio_taps) =", len(audio_taps)

diff --git a/gnuradio-examples/python/usrp/usrp_nbfm_rcv.py b/gnuradio-examples/python/usrp/usrp_nbfm_rcv.py
index c63bef0c4ee19c59aacb4d3edb7bf191d473d43c..7aa45575d6a1ef5cfb69ad35f3a715da225331d4 100755 (executable)
--- a/gnuradio-examples/python/usrp/usrp_nbfm_rcv.py
+++ b/gnuradio-examples/python/usrp/usrp_nbfm_rcv.py
@@ -273,8 +273,8 @@ class receive_path(gr.hier_block2):
         # Create filter to get actual channel we want
         chan_coeffs = gr.firdes.low_pass (1.0,                # gain
                                           self.if_rate,       # sampling rate
-                                          13e3,               # low pass cutoff freq
-                                          4e3,                # width of trans. band
+                                          8e3,               # low pass cutoff freq
+                                          2e3,                # width of trans. band
                                           gr.firdes.WIN_HANN) # filter type 
 
         print "len(rx_chan_coeffs) =", len(chan_coeffs)