On 1/10/2011 6:58 PM, Marcus D. Leech wrote:
* It seems to me we could minimize this problem by writing a small
program that would tune an over-the-air frequency standard (like one
of the WWV broadcasts) and compare it to the local oscillator. The
resulting frequency offset could then be stored a
2) Have your demodulator provide feedback to the
frequency-setting code to tweak the actual LO frequency (or DDC
frequency, which is usually faster). This is the most general
approach, since it makes your code work well even on a platform that
doesn't have a high-quality external reference
> 2) Have your demodulator provide feedback to the
> frequency-setting code to tweak the actual LO frequency (or DDC
> frequency, which is usually faster). This is the most general
> approach, since it makes your code work well even on a platform that
> doesn't have a high-quality external r
Make a simple little FFT sink in GRC and use it on one of the USRPs to
determine the received signal offset from the other USRP while it is
transmitting. Or receive a signal from a signal generator of known
frequency and note the offset for both USRPs. Or transmit a signal from
each USRP and recei
On Mon, 2011-01-10 at 15:55 -0500, Thomas H Kim wrote:
> All,
>
> I am testing 2x USRP1 with RFX2400 daughter cards with benchmark_rx
> and benchmark_tx scripts and have questions.
> When I set the MCS to dbpsk, error rate I got was close to zero.
> When I set it to dqpsk, d8psk, error rate is
MHz reference input.
You could also the use the 1 PPS input for your two USRPs.
Let me know if this helps.
Steve
--- On Mon, 1/10/11, Thomas H Kim wrote:
From: Thomas H Kim
Subject: [Discuss-gnuradio] Benchmark scripts
To: discuss-gnuradio@gnu.org
Date: Monday, January 10, 2011, 3:55 PM
All
All,
I am testing 2x USRP1 with RFX2400 daughter cards with benchmark_rx and
benchmark_tx scripts and have questions.
When I set the MCS to dbpsk, error rate I got was close to zero.
When I set it to dqpsk, d8psk, error rate is 100%.
When I set it to gmsk, certain daughter cards had close to 0
Hello all, I've got a GNURadio install on two laptops, both of which have
version 3.3.0 on them. They are both Dell Latitudes E5500 with Ubuntu 9.10
x86 on them. I have two USRP2s with the correct firmware installed on the SD
cards to operate the WBX daughter card (txrx_wbx_raw_eth_20100608.bin). I
