On 06/22/2018 05:43 PM, Farhad Mirkazemi via USRP-users wrote:
Hello all,
I'm recording RF signal at 1.5 GHz using usrp2 with wbx daughterboard
of fixed BW of 40 MHz; since I'm interested to capture the whole BW, I
set the over-the-wire format to sc8 to be able to have 50 MSps rate;
as example rx_samples_to_file suggests, there is no "byte" or "char"
format to store 8 bit IQ samples; now, if I use "short" type and try
to read my binary file using matlab, for example, and use the same
"int16" format as I was doing for SC16 wireformat, i.e interpreting it
as I1, Q1, I2, Q2 ..... using "int16" reading format, the spectrum
looks not the way it should. I know it also has to do with the host
cpu format which in my case it is 64 bit processor but I don't know
how to manage the transformation between the host and the packet
router. Can some please explain how it works and if possible how to
interpret the data on platform other than uhd? it is also appreciated
if explain how I could store using 8 bit format so that the file size
be reduced to half.
Thanks,
You may need to tweak the dynamic range in the device arguments, using
"peak=0.01" or even "peak=0.001", depending on hows strong your
signal is.
Also, could you describe what you mean by "not what it should be" ??
That's a little vague.
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