Re: [Discuss-gnuradio] benchmark_tx and benchmark_rx

[Ekko]

hello tom

Now it is about benchmark,i use benchamrk tx and rx, 

the question is when i use uhd_sink ,i got the  BER（wrong packet）is nearly 1,and the program is not fluent，

then i replace the uhd_sink with file sink,the program is ok,and the rx data is ok.

i want to ask what does the uhd_sink do with the data ,because when i use the file sink,the program is ok ,means that the cpu is able to do these works(encoder modulate), when i use the uhd_sink ,the program become slow,and i got all wrong data at rx.

thank you 

--Ekko

2016-03-07 21:20 GMT+08:00 Tom Rondeau <address@hidden>:

On Sun, Mar 6, 2016 at 8:48 AM, Ekko <address@hidden> wrote:

hello all

today i use the demo of gnuradio

benchmark_tx.py and benchmark_rx.py

and the demo is work with my two device(e310)

just like 

dev A:/benchmark_tx.py --freq=433e6

dev B:/benchmark_rx.py --freq=433e6

and

dev A:/benchmark_rx.py --freq=433e6

dev B:/benchmark_tx.py --freq=433e6

 this all worked well

then i use tunnel.py to ping two device

just like

dev A:./tunnel.py --freq=433e6

          ifconfig gr0 192.168.200.1

dev B:./tunnel.py --freq=433e6

ifconfig gr0 192.168.200.2

then 

dev B:ping 192.168.200.1  failed

dev A:ping 192.168.200.2 failed

i want to know why the benchmark.py work well but the tunnel.py does not work?

thank you 

--Ekko

The tunnel.py program has long given us trouble. One thing to do here is see what happens when you set the transmit and receiver frequencies to different values so you're doing an FDD mode.

Otherwise, there's very little help we can give you since all of the settings make a difference here.

Tom