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-rwxr-xr-xgr-uhd/examples/fm_tx4.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/gr-uhd/examples/fm_tx4.py b/gr-uhd/examples/fm_tx4.py
index 7b04ebd73..11148ea63 100755
--- a/gr-uhd/examples/fm_tx4.py
+++ b/gr-uhd/examples/fm_tx4.py
@@ -85,6 +85,8 @@ class fm_tx_block(stdgui2.std_top_block):
parser = OptionParser (option_class=eng_option)
parser.add_option("-a", "--args", type="string", default="",
help="UHD device address args [default=%default]")
+ parser.add_option("", "--spec", type="string", default=None,
+ help="Subdevice of UHD device where appropriate")
parser.add_option("-A", "--antenna", type="string", default=None,
help="select Rx Antenna where appropriate")
parser.add_option("-s", "--samp-rate", type="eng_float", default=400e3,
@@ -134,6 +136,11 @@ class fm_tx_block(stdgui2.std_top_block):
self.set_gain(options.gain)
self.set_freq(options.freq)
+ # Set the subdevice spec
+ if(options.spec):
+ self.u.set_subdev_spec(options.spec, 0)
+
+ # Set the antenna
if(options.antenna):
self.u.set_antenna(options.antenna, 0)