Installation of GNU Radio!

GNU Radio
1

I have read the README file provided at GNURadio site and Another PDF
file for installation on GNURadio software to my PC, but facing a big
number of problems.
There is a description of my system:
I have installed Ubuntu 9.04 (Jaunty)Â on VMWARE. What is prerequisites
for Ubuntu (regarding its installation) that must be there before the
installation of GNU?
Python 2.6 is installed. What is required for GNU from python?
GNU packages are downloaded but they are installed because there is some
trouble.
I am totally new to GNU, Ubutu and python. Kindly tell me how to
proceed?

I am attaching a file from where help is taken to install GNU.

Regards!!!
Muhammad Naeem
Department of Communication Systems Engineering,
Institute of Space Technology, Islamabad

2

On Tue, Jan 26, 2010 at 04:11, Muhammad Naeem
[email protected] wrote:

I have installed Ubuntu 9.04 (Jaunty) on VMWARE.

Your shortest route to a successful GNU Radio installation is to
perform a pre-compiled binary package installation. By following the
instructions here:

http://gnuradio.org/redmine/wiki/1/DebianPackages

…the Ubuntu package manager will download all necessary dependencies
and you will not need to perform any source compilation.

Johnathan

3

We will be using the USRP in an environment where it will be engaged by
an Electronic Attack system capable of putting out about 40MW of EIRP in
the form of pulses that are on the order of 4ns (possibly longer) but
with very fast rise times on the order of 500ps. Our system will be
using just the simple vertical whip antennas sold by Ettus. We are
looking at using pretty much all of the Flex series of daughterboards
and possibly the XCVR2450 and WBX boards as well.

What I need to determine is what the maximum power is that can be
present at the antenna in order to avoid damaging the front end so that
we can determine the minimum range to the jammer during the exercise.

Thanks.

4

On 01/27/2010 03:53 PM, William L. Bahn wrote:

we can determine the minimum range to the jammer during the exercise.

Thanks.

Wow… that’s a lot of power. In any case, the parts are all spec’ed in
terms of maximum CW input power, so you’ll need to take into account
center frequency, pulse width, duty cycle, duration of test, bandwidth
of your filters, etc.

Based on the part datasheets, the absolute maximum input power for the
RFX boards is -10dBm.

The chip in the XCVR2450 specs +10 dBm.

For the WBX it will depend on your gain setting. At maximum gain it
will be -15 dBm, and at minimum gain it is about +15 or +20 dBm. If you
remove the small granddaughterboard, you’ll lose about 18 dB of gain but
would have a higher safe input power of nearly a watt as long as you
have the maximum attenuation set.

You can probably exceed these for brief periods, but I’m not sure, as
I’ve never tried anything over -10dBm on any of these boards. Please
let me know how this goes for you!

Matt

5

On 01/27/2010 03:53 PM, William L. Bahn wrote:

we can determine the minimum range to the jammer during the exercise.

Thanks.

You’ll also want to make sure the enclosure is completely sealed, and
may want to put shielding boxes or foil around everything.

Matt