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-rwxr-xr-xgr-digital/examples/narrowband/tunnel.py10
1 files changed, 9 insertions, 1 deletions
diff --git a/gr-digital/examples/narrowband/tunnel.py b/gr-digital/examples/narrowband/tunnel.py
index 970920e6e..7f40bb1c3 100755
--- a/gr-digital/examples/narrowband/tunnel.py
+++ b/gr-digital/examples/narrowband/tunnel.py
@@ -35,7 +35,7 @@
# ////////////////////////////////////////////////////////////////////
-from gnuradio import gr, digital, uhd
+from gnuradio import gr, digital
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from optparse import OptionParser
@@ -118,6 +118,14 @@ class my_top_block(gr.top_block):
"""
return self.rxpath.carrier_sensed()
+ def set_freq(self, target_freq):
+ """
+ Set the center frequency we're interested in.
+ """
+
+ self.sink.set_freq(target_freq)
+ self.source.set_freq(target_freq)
+
# ////////////////////////////////////////////////////////////////////
# Carrier Sense MAC