Problem with over-the-wire format sc8

GNU Radio
1

Hi List,

i wanted to try out the over-the-wire sc8.
For this i use the utility “rx_sample_to_file”.
By sc8 i see a problem in time and frequency domain.
In time domain and with --wirefmt sc8 i get only “-256,0,256” values (i
use: --type short)

Is it possible to use sc8 with this utility “rx_sample_to_file”? What is
wrong??

I attached two pictures of the over-the-wire sc8 and sc16

for sc16 i receive the data with:
./rx_samples_to_file --wirefmt sc16 --freq 658000000 --gain 29 --rate
25000000 --nsamps 51200

and for sc8 i receive the date with:
./rx_samples_to_file --wirefmt sc8 --freq 658000000 --gain 29 --rate
25000000 --nsamps 51200

UHD-version:
linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.004.000-19-g74a9352c

many thanks in advance
Andrej

2

On Wed, Apr 18, 2012 at 04:08:09PM +0200, Andrej Tissen wrote:

./rx_samples_to_file --wirefmt sc16 --freq 658000000 --gain 29 --rate 25000000
–nsamps 51200

and for sc8 i receive the date with:
./rx_samples_to_file --wirefmt sc8 --freq 658000000 --gain 29 --rate 25000000
–nsamps 51200

What’s this tool? rx_sample_to_file is not part of standard GNU Radio.
Try

$ uhd_rx_cfile --wire-format sc8 -f 658000000 -g 29 --samp-rate 25000000
-N 51200

I’ve used sc8 and it works fine.

MB

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