Usually, I generate signals by MATLAB and convert it to binary data. Then, I 
use “rfnoc_replay_samples_from_file” utility like the following:

./rfnoc_replay_samples_from_file --args 
‘type=x300,addr=192.168.20.2,second_addr=192.168.40.2,master_clock_rate=200e6,ignore-cal-file=1’
 --freq 2.3e9 --file tx_singleTone.dat --rate 100e6 --ant ‘TX/RX’

As to the OFDM signal, I upconvert the baseband signal to a low IF frequency by 
MATLAB, not with the UHD 
driver.![](/home/attar/Downloads/singleTone_ignore-cal-file.jpg)
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