SR wrote:

Hi Eric: I am not talking about a signal streghth or SWR meter as most
radio will have. It more like a scope or radar giving pattern
information on the reciving attena. I was wondering if there was a
device that could tell you from which dirrection and pattern the signal
comming from and how.

No -- that sort of plot can be generated by a sophisticated antenna
system along with an equally sophisticated radio, but to do it
"automagically" would be a little more difficult.

Now, someone could write software to electrically or physically turn a
very directional antenna and generate a signal strength vs. direction
polar plot -- in fact, something similar to that is done on antenna
measuring ranges, but it is non-trivial and you couldn't listen very
well while it did the plot.

No, what I was referring to was a Strength vs. Frequency plot, along
the lines of the two graphs you see in this image:

http://www.dim.com/~efricha/wrdisplay.png



In the Now Your talking Book, their is a diagram of attenas patterns. I
thought their must be some kind of a device for giving this information.

I've seen too many WW2 movies. LOL!

SR, 73!

Now,

Eric F. Richards wrote:
SR wrote:


I was wondering if their was device that I could connect to a radio
while listening to the airwaves that will give me a video display on the
receiving signal. Is their a such thing?

SR 73!



I presume you mean to display a frequency vs. signal strength graph...
the answer is yes -- they are called panoramic adaptors or
panadaptors. A more general device would be a spectrum analyzer, used
as a panadaptor.

You can expect to pay about $1500 for a new one, and at least one is
being made today. I bought one for about $100 and was only marginally
satisfied. I bought a spectrum analyzer for $300 that does a much
better job.

You can read about my experiences in this thread, using Google news,
starting with this article:

Message-ID:





--
Eric F. Richards

"The most likely way for the world to be destroyed, most
experts agree, is by accident. That's where we come in;
we're computer professionals. We cause accidents."
- Nathaniel S. Borenstein