ve enough time to go
from transmit mode to receive mode (XCVR2450 is a half-duplex daughterboard).
But I don't know how to verify this hypothesis.
Can anyone help me?
Thank you,
Johnny
On Thu, Oct 20, 2011 at 11:24 AM, Marcus D. Leech wrote:
On 20/10/2011 10:25 AM, David Barton
at="flowed"
On 20/10/2011 10:25 AM, David Barton wrote:
> I have been troubleshooting an issue with possible packet relflections
> and cannot figure out the cause. I am running tunnel.py on two USRP2s
> that are cabled together with a 20dB attenuator between them. The
> set
I have been troubleshooting an issue with possible packet relflections and
cannot figure out the cause. I am running tunnel.py on two USRP2s that are
cabled together with a 20dB attenuator between them. The settings I am using on
both sides for tunnel.py are:
Tx Gain: 15 dB
Rx Gain: 10 dB
Ca
I have been running it for a few days and have no issues now. The tunnel seems
to continue working for days.
Thanks for your help!
Dave
From: Feng Andrew Ge
To: David Barton
Cc: discuss-gnuradio@gnu.org
Sent: Fri, April 29, 2011 4:02:06 PM
Subject: Re
Ok. Would the case I described also cause the same shape exception killing the
receive chain. Because anytime it fails on me it always is with 4095 which I
cant figure out why.
Thanks,
Dave
From: Feng Andrew Ge
To: David Barton
Cc: discuss-gnuradio@gnu.org
hanks,
Dave
From: Feng Andrew Ge
To: discuss-gnuradio@gnu.org; David Barton
Sent: Fri, April 29, 2011 10:35:52 AM
Subject: Re: [Discuss-gnuradio] Tunnel.py exception
Dave,
In the patch I told you, please change 4096 to 4095, that is,
if (string_len
From: Thomas Hauer
To: William Cox ; David Barton
Cc: discuss-gnuradio@gnu.org
Sent: Wed, April 27, 2011 8:39:26 AM
Subject: AW: [Discuss-gnuradio] Tunnel.py exception
Hello William, Hello David,
i had this problem too.
I changed my tunnel.py to understand mac better into a simple program
g_len < 4096) :
ok, payload = packet_utils.unmake_packet(msg.to_string(),
int(msg.arg1()))
Andrew
On 04/21/2011 12:00 PM, discuss-gnuradio-requ...@gnu.org wrote:
> Date: Thu, 21 Apr 2011 07:31:33 -0700 (PDT)
> From: David Barton
> To: Tom Rondeau
> Cc:discuss-gnuradio@gnu.org
>
1 Mbps. Unfortunatly this makes it unusable for longer duration lower
bandwidth tests until I find a way to fix the problem.
Has anyone else had this problem with tunnel.py?
Thanks,
Dave
From: Tom Rondeau
To: David Barton
Cc: discuss-gnuradio@gnu.org
Sent
I am running tunnel.py on gnuradio 3.3.0 . It run successfully for a while but
after a period of time (around an hour) the following exception prints out:
Rx: ok = True len(payload) = 82
Tx: len(payload) = 82
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib64
When I run tunnel.py and configure the grX interface IP address I noticed using
ifconfig that a seemingly random MAC address is assigned to the gr interface.
Does ayone know if there is any logic to how the address is created?
Thanks,
Dave
___
Hi,
I am having trouble with the tunnel.py in the digital foler appear to stop
working after a while when using lower bitrates (around 0.5 MB/s) . When I
first
set up the newtork I am able to ping other nodes with no problem. After some
time (sometimes less than half an hour) the pings are no
Hi,
I am relatively new to GNU Radio. I set up a simple experiment of connecting a
file source directly to the usrp sink and monitoring the traffic on the
ethernet
port using wireshark. The source file simply contains the letters abc. When I
ran the flowgraph in GRC it did seem to initiate tra
Thanks Eric.
So the packet encoder samples /symbol does not affect the bit rate but just
needs to match the dpsk samples/ symbol rate?
Dave
From: Eric Blossom
To: David Barton
Cc: discuss-gnuradio@gnu.org
Sent: Wed, May 12, 2010 2:02:42 PM
Subject: Re
Hi,
I have set up the following simple digital data transmitter:
File source -à throttle -à packet encoder --- > DBPSK modulator -à
USRP2
File size sample rate samples/sym - 2 samples/sym –
2 Inter rate 32
-variable 3.125M
From: Jason Uher
To: discuss-gnuradio@gnu.org; david.barto...@yahoo.com
Sent: Thu, April 22, 2010 7:51:41 AM
Subject: Re: [Discuss-gnuradio] DPSK Modulator and Demodulator
Thanks Jason. I have not delved into the code of the dbpsk demodulator
GRC block yet
Hi,
I am having trouble the the DBPSK mod and demod blocks. My flow graph is:
file source -> DBPSKmod -> DBPSKdemod -> file sink
The file source is a 2 byte text file set to not repeat
The default parameters were used for the DBPSKmod and demod blocks (including 2
Samples/Symbol)
When I run the
Hi,
Is there any documentation or source code available for signal processing done
in the USRP2 FPGA? I have seen lots of block diagrams, etc. for USRP but been
unable to find anythign similar for usrp 1.
Thanks,
Dave
___
Discuss-gnuradio mail
Hi,
In GRC I hooked up a signal source with a 100kHz sampling rate directly to a
FFT sink. I accidentally listed the FFT sampling frequency as 200kHz. I noticed
that it did not complain and all it did was shift the actual signal source
frequency by a factor of 2. So my guess would be that the F
Hi,
I have questions about the parameters in the DBPSK and Low Pass Filter blocks
in GRC.
Low Pass Filter block:
1) If I set the lowpass filter block to interpolate by a factor of 10
should the sampling rate parameter by set to the input sampling rate or the
output sampling rate since they wi
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