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-rwxr-xr-xgnuradio-examples/python/digital/benchmark_loopback.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/gnuradio-examples/python/digital/benchmark_loopback.py b/gnuradio-examples/python/digital/benchmark_loopback.py
index 4cc4a7bee..47e4f2028 100755
--- a/gnuradio-examples/python/digital/benchmark_loopback.py
+++ b/gnuradio-examples/python/digital/benchmark_loopback.py
@@ -44,6 +44,11 @@ class my_top_block(gr.top_block):
noise_power = power_in_signal/SNR
noise_voltage = math.sqrt(noise_power)
+ # With new interface, sps does not get set by default, but
+ # in the loopback, we don't recalculate it; so just force it here
+ if(options.samples_per_symbol == None):
+ options.samples_per_symbol = 2
+
self.txpath = transmit_path(mod_class, options)
self.throttle = gr.throttle(gr.sizeof_gr_complex, options.sample_rate)
self.rxpath = receive_path(demod_class, rx_callback, options)