http://www.defensetech.org/archives/001545.html
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Krzysztof Kamieniecki
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On Wed, 11 May 2005 23:49, James Cooley wrote:
> In the other window, do:
> #> gzip -dcf data.gz > testfifo
>
>
>
> Seems to work barely on my laptop, which is a 1.6 GHz pentium M
> machine HOWEVER, to aid things along even more, I did the captures
> without using X-windows (you don't need it i
On Thu, 12 May 2005 01:08, cswiger wrote:
> Daniel & James (et al) - Firewire or USB drive looks the way to go,
> with compression in the stream (Tks James). I've found a world of
> 12vdc input ATX power supplies are available, like:
>
> http://www.orbitmicro.com/products/power%20supplies/dc-dc/ps2
Hi John
Thanks for the tip, but as you guessed, I am looking for something a
little more professional and turnkey so to speak.
The system alone, would need to handle and log over 24hours of
spectrum traces for analysis and comparison etc.
If anyone has any further ideas I'd sure appreciate them.
Thanks to the troubleshooting efforts of Jon Jacky, we've now got
scope and fft sinks that work reliably on OS/X. [There was a problem
with os.read returning a short read count.]
I've also added a
gr.throttle(itemsize, sample_rate)
block that limits the average sample rate through the block
> Looking for faster/bigger portable storage. The Adaptec SlimSCSI 1480
> card will only do
> 20MB/sec.
For what you are doing, my suggestion would be to store 8 bit signed
samples instead of floats or 16-bit shorts. You'll need a block to
convert from 16 bits (gr.usrp_source_s) to bytes. You c
Hi,
I am starting to use gnuradio and I was trying to get everything
working. I downloaded from CVS bootstrapped, configured and made. But
when I try to do a make check I get a SIGBUS on test_runtime and
test_vmcircbuf. What might that be? I am using Fedora Core 3.
Thanks,
Romano
__
tvrx_debug and tvrx_wfm_rcv_gui were written to call
usrp.source_c with an argument for the mux in the
form 0xf0f0f0fA where A = 0 or 2 depending on
where the tvrx is located. usrp.source_c seems to
have been modified to drop the requirement for
the 0xf0f0f0f part. I have tvrx on both RX A
an
I suspect the original poster was looking for something a little more
sophisticated, but since Richard mentioned using a c program an visa,
I'll mention the linux-gpib project which provides drivers and a
more-or-less NI compatible library to talk to GPIB cards from several
vendors. I've writt
If you have a GPIB card, you can use a simple program like this to log data
points in a range of spectrum. This was for an HP spectrum analyzer, but if
you're using visa it shouldn't matter.
// SpectrumSurvey.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#incl
Hi
I was wondering if any of you guys had links or pointers to general
good quality RF analysis and logging software?
Ideally it would be compatible with the likes of the gnu radio
hardware, but could also be interfaced to drive an agilent spectrum
analyser or similar
Any tips or thought wel
James Cooley wrote:
...I'm sure
there's a way to come up with a compression scheme that's tailored to
the sort of sample data we see...
A topic for a dissertation if ever there was one :-)
In the general case, you're going to have to work hard to
beat Ziv-Lempel. You might improve the performanc
All,
I've got a Targus 150W APV07US Slimline inverter and a Buslink external
usb enclosure... works great. Only things are that the Targus lets out
this ear-splitting beep for some unknown reason when it starts up
Also, my car's a bit flaky in that it shuts off the cigarette lighter
power a
Daniel & James (et al) - Firewire or USB drive looks the way to go,
with compression in the stream (Tks James). I've found a world of
12vdc input ATX power supplies are available, like:
http://www.orbitmicro.com/products/power%20supplies/dc-dc/ps2/KPDX250H.htm
might run a small server mobo with b
I have successfully used an external USB 2 drive along with the usrp, no
problems. And that's with a USB hub with USB2 drive as well as a GPS
attached and spewing data. There's a trick, though compression. You
can make a fifo, ask gnuradio to write to it, and zip it.
In one window, make the
On Wed, 11 May 2005 21:43, Chuck Swiger wrote:
> for about 3 or 4 minutes each before filling up 20Gb free space. Still it's
> nice to collect
> field data for later slicing and dicing in the basement.
>
> Looking for faster/bigger portable storage. The Adaptec SlimSCSI 1480 card
> will only do
> 2
First, that IS great news about the ccf filter code.
Last Sundays trip to the mountaintop with a view of several states was
interesting, altho
too short. An 8Mhz wide plot of the FM band centered at 100Mhz is shown here:
http://webpages.charter.net/cswiger/fm_mountain_top.jpg
using a Radio Shack
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