Am 29.06.2011 16:34, schrieb Marcus D. Leech:
On 29/06/2011 9:11 AM, Ralf wrote:
Hi,
the simple GRC in the attachment creates lots of underflows on our
E100 ("U" on console)
and dropouts when looking at the spectrum.
Is this as expected or how can this overload of the embedded Linux be
avoi
On 06/30/2011 05:27 AM, Ralf wrote:
>
>
> Hi Marcus, thanks for your reply.
>
> That is very important for us to understand. How is the divider 512
> determined? It is in the FPGA I suppose.
> Where can read more about the FPGA besides this small text?
> http://www.gnu.org/software/gnuradio/doc/exp
Am 30.06.2011 um 11:27 schrieb Ralf:
> Am 29.06.2011 16:34, schrieb Marcus D. Leech:
>> On 29/06/2011 9:11 AM, Ralf wrote:
>>> Hi,
>>>
>>> the simple GRC in the attachment creates lots of underflows on our E100
>>> ("U" on console)
>>> and dropouts when looking at the spectrum.
>>>
>>> Is this
Dear GNU Radio list,
I've being diving into some GNU Radio examples in order to communicate
two USRP2s (e.g. USRP2 #1 pings USRP2 #2). Following the example
"tunnel.py", in $GNURADIO_PATH/gnuradio-examples/python/digital, I've
been able to do it, but with a GMSK/DBPSK/DQPSK modulation scheme.
My
Dear all,
I have been testing USRP2 with WBX board (#957). Using GNU Radio, I
have created a simple CW TX system. The problem: output signal is
oscillating when I set the TX frequencies to 900MHz band. Signal
output (in time domain) at TX/RX connector from the FSL analyzer is in
the attachment.
S
Hello!
I bypassed successfully the ADC lines directly to the DAC lines using the
GNU Radio FPGA code but I tried to do the same with the UHD code and it was
impossible, I always get zero as amplitude. I am doing this bypass into the
u2_core module.
Does anyone have an idea about what is going on?
I have seen the same issue in the last couple of days.
My setup:
Ubuntu 10.04 laptop
UHD + GNUradio 3.3
USRP2 with WBX
TX parameters:
15dB gain, 1090MHz center frequency
4MS/s transmission
RX parameters:
25dB gain, 1090MHz center frequency
4MS/s acquisition
transmitted signal:
U(t) = 10mV + 5m
Hi, I'm trying to get a basic IP-based network running between 2 or 3 USRPs
and I'm having trouble trying to send broadcast UDP packets via
dial_tone_sink.py in the network examples. I'm sending the packets
addressed to 192.168.200.255 with port 0 but this continuously results in a
"can't open soc
Eric, in your 2009 experiment indicated below, did the USRP2 sustain the high
temperature of 150 F?
Is there anybody else who has tried to use USRP2 continuously at a temperature
above 105 F? Your feedback is highly appreciated.
Andrew
On Mon, Jul 13, 2009 at 1:13 PM, Eric Matlis wrote:
Hi Juan,
It isn't too hard to modify the OFDM tunnel script to use UHD instead
of the old USRP blocks.
You have to change the flow graph in tunnel.py to use new sink and
source blocks and update all of the sample rate and frequency setting
functions.
You can take a look at how I did it here:
htt
Hi,
I've been working on building a CSMA/CA MAC for the past couple of
weeks. I built it in Python, and used ofdm/tunnel.py as a guide. It's
working now, but I don't think it's very efficient. I ended up having
to relax a lot of timing parameters to get it working, so my
throughput is pretty bad.
Hi.
I wanted to know about the preambles that are inserted in the ofdm packet. I
know they are inserted for the synchronization and frequency offset
purposes.
But I want to know where in the OFDM packet they are inserted. I have
following questions.
1. How can I vary the length of preambles? Can I
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