Infinite receive and transmission

GNU Radio
1

Hello list,

I am beginner for USRP networked series N210.

I have two N210 connected to my host i.e. laptop. I am trying to check
transmission and reception using two USRP .

When
i am passing the command for transmission it is taking too much time
(running sicne last 3 hours) . I am using benchmark_tx.py and
benchmark_rx.py by passing the below command for the transmission;

gnuradio/gr-digital/examples/narrowband$
sudo python benchmark_tx.py --args=addr=192.168.10.4 -f 800e6 -r 500e3
-A TX/RX -M 0.5 --tx-gain 10 --ampl 0.5

Why this almost infinite time. However, this issue was not with the USRP
1 series with the same commands.

what i am doing wrong while transmission?

Please guide me in this regards.

Thank you, regards

2

On Thu, Jun 18, 2015 at 9:14 AM, alok ranjan [email protected]
wrote:

benchmark_rx.py by passing the below command for the transmission;
Please guide me in this regards.

Thank you, regards

I’m not sure what you mean by it being “almost infinite time”? You mean
it’s taking too long to start transmitting?

Thing 1: don’t run this command with sudo. There’s no need for that. If
you
are having issues with permission talking to the hardware, fix those by
installing the udev rules.

Thing 2: the benchmark_tx.py script only transmits a finite number of
packets. Here you are setting it to 0.5 MB and your transmitting at 0.5
Mb/s, so you should be done in about 8 seconds.

Also, what version of GNU Radio are you running? The ‘–ampl’ isn’t a
supported argument for this. It’s ‘–tx-amplitude’. Run
‘gnuradio-config-info -v’ to find this out.

Tom

3

Hello Tom,

Thank you for your reply to my queries .

After running the command for ’ gnuradio-config-info’ it is giving the
output as 3.7.2.1 .

Infinite time means that it keep on transmitting for several hours
(Checked upto 5 hours).

Thank you,

From: [email protected]
Date: Thu, 18 Jun 2015 09:56:07 -0400
Subject: Re: [Discuss-gnuradio] infinite receive and transmission
To: [email protected]
CC: [email protected]

On Thu, Jun 18, 2015 at 9:14 AM, alok ranjan [email protected]
wrote:

Hello list,

I am beginner for USRP networked series N210.

I have two N210 connected to my host i.e. laptop. I am trying to check
transmission and reception using two USRP .

When
i am passing the command for transmission it is taking too much time
(running sicne last 3 hours) . I am using benchmark_tx.py and
benchmark_rx.py by passing the below command for the transmission;

gnuradio/gr-digital/examples/narrowband$
sudo python benchmark_tx.py --args=addr=192.168.10.4 -f 800e6 -r 500e3
-A TX/RX -M 0.5 --tx-gain 10 --ampl 0.5

Why this almost infinite time. However, this issue was not with the USRP
1 series with the same commands.

what i am doing wrong while transmission?

Please guide me in this regards.

Thank you, regards

I’m not sure what you mean by it being “almost infinite time”? You mean
it’s taking too long to start transmitting?
Thing 1: don’t run this command with sudo. There’s no need for that. If
you are having issues with permission talking to the hardware, fix those
by installing the udev rules.
Thing 2: the benchmark_tx.py script only transmits a finite number of
packets. Here you are setting it to 0.5 MB and your transmitting at 0.5
Mb/s, so you should be done in about 8 seconds.
Also, what version of GNU Radio are you running? The ‘–ampl’ isn’t a
supported argument for this. It’s ‘–tx-amplitude’. Run
‘gnuradio-config-info -v’ to find this out.
Tom

4

On Thu, Jun 18, 2015 at 10:04 AM, alok ranjan
[email protected]
wrote:

Thank you,

No, it can’t possibly be transmitting for that length of time.

Are you verifying that it’s actually transmitting? Or is it just that
the
script never stops? What does it look like on your receiver?

Tom