Dominic Gualtieri wrote:

> First of all I would like to thank everybody who replied to my question.
> Your advice has been greatly appreciated. Secondly, I have decided to
> use an oscillator running at  1 ( 1ns per foot) gigahertz with a counter
> and have a PIC do the conversions. While I am in the process of finding
> info on constructing a frequency stable 1 gig oscillator I am curious to
> know if anybody on the list has any knowledge or suggestions on building
> an oscillator for my PIC based application. Hope this question is not
> off-topic.

I have a feeling finding 1GHz counters won't be easy. You could probably
use an array of /2 prescalers and try to gate the signal, but it won't be easy.

Someone suggested mixing the reflected signal with the transmitted one,
and sweeping the transmitted signal. This not only sounds like the most
logical solution, but also the easiest to implement. There is a s***load
of mixer-amplifier solutions from various manufacturers you can choose
from.

You will have to have some frequency synth anaway, so why not take one
with serial access, then you can even sweep the frequency with the PIC.

--
Friendly Regards

Tjaart van der Walt
mailto:tjaart@wasp.co.za

Add your voice !!
Vote at the Great G Com Public Vote. Go to :
http://www.wasp.co.za/~tjaart/gcomvote.html

|--------------------------------------------------|
|                WASP International                |
|R&D Engineer : GSM peripheral services development|
|--------------------------------------------------|
|SMS mailto: 0832123443@wasp.co.za  (160 chars max)|
|     http://www.wasp.co.za/~tjaart/index.html     |
|Voice: +27-(0)11-622-8686  Fax: +27-(0)11-622-8973|
|          WGS-84 : 26¡10.52'S 28¡06.19'E          |
|--------------------------------------------------|