Mario ) writes:
John Miles wrote in message ...
In article ,
says...
hi, where can i find practical high fre spectrum analyser circuit?
thanks


The W7ZOI homebrew spectrum analyzer article is not to be missed:

http://www.qsl.net/n9zia/wireless/pdf/9808035.pdf (part 1)
http://www.qsl.net/n9zia/wireless/pdf/9809037.pdf (part 2)

You'll find this design vastly superior to the "poor man's spectrum
analyzer" projects out there that are based on CATV tuners.


Here is an updated version of the W7ZOI spectrum analyzer on the same site:

http://www.qsl.net/n9zia/spec/index.html

For that matter, Wes Hayward has his own webpage, and he has some material
related to the project at:
http://users.easystreet.com/w7zoi/SA.html
According to that page, one can download the original articles from
the ARRL website, in pdf format, but doing a search over there, I don't
get a hit on the articles.

I don't see it in the 2001 Handbook (the only recent one I have), but
perhaps it's in that new Hayward book, "Experimental Methods in RF Design"
but I've yet to order my copy.

And of course, Kanga, http://www.bright.net/~kanga/kanga
has boards for the project, and they have some additional information
on their website.

Michael VE2BVW

In article ,
says...

Here is an updated version of the W7ZOI spectrum analyzer on the same site:

http://www.qsl.net/n9zia/spec/index.html


Mmm. Postscript documents. Real useful. NOT...

Sounds like an interesting variation on the project, but without
documentation in a standard, open format, his audience is going to be
limited.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

"John Miles" wrote in message
...
In article ,
says...

Here is an updated version of the W7ZOI spectrum analyzer on the same
site:

http://www.qsl.net/n9zia/spec/index.html


Mmm. Postscript documents. Real useful. NOT...

Sounds like an interesting variation on the project, but without
documentation in a standard, open format, his audience is going to be
limited.

Postscript is about as open and standard a format as you will find.
http://www.cs.wisc.edu/~ghost/ has free ghostscript viewers for most popular
platforms (windows, Linux, Mac, OS/2, VMS, etc).

- 73 Bob W7OV

In article , says...

Postscript is about as open and standard a format as you will find.

It was never intended for online document distribution, though.
Postscript is for (obsolete) printers, and .PS files are an (obsolete)
hack.

..PDF is designed from the ground up for online viewing, and it's less
likely to require users to compile their own viewer application.

Actually, neither .PS or .PDF is as nice as DjVu for onscreen viewing,
but of the three, .PDF has by far the best shot at long-term archive
survival.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

John Miles wrote:
In article , says...

Postscript is about as open and standard a format as you will find.

It was never intended for online document distribution, though.
Postscript is for (obsolete) printers, and .PS files are an (obsolete)
hack.

Erm ... Not from where I stand, and work, and not for a lot of
other computer professionals -- although I grant that few of them
are Windows users.

--
Mike Andrews

Tired old sysadmin since 1964

John Miles wrote:
In article , says...

Postscript is about as open and standard a format as you will find.

It was never intended for online document distribution, though.
Postscript is for (obsolete) printers, and .PS files are an (obsolete)
hack.

Erm ... Not from where I stand, and work, and not for a lot of
other computer professionals -- although I grant that few of them
are Windows users.

--
Mike Andrews

Tired old sysadmin since 1964

In article , says...

Postscript is about as open and standard a format as you will find.

It was never intended for online document distribution, though.
Postscript is for (obsolete) printers, and .PS files are an (obsolete)
hack.

..PDF is designed from the ground up for online viewing, and it's less
likely to require users to compile their own viewer application.

Actually, neither .PS or .PDF is as nice as DjVu for onscreen viewing,
but of the three, .PDF has by far the best shot at long-term archive
survival.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

"John Miles" wrote in message
...
In article ,
says...

Here is an updated version of the W7ZOI spectrum analyzer on the same
site:

http://www.qsl.net/n9zia/spec/index.html


Mmm. Postscript documents. Real useful. NOT...

Sounds like an interesting variation on the project, but without
documentation in a standard, open format, his audience is going to be
limited.

Postscript is about as open and standard a format as you will find.
http://www.cs.wisc.edu/~ghost/ has free ghostscript viewers for most popular
platforms (windows, Linux, Mac, OS/2, VMS, etc).

- 73 Bob W7OV

Mmm. Postscript documents. Real useful. NOT...

I know the feeling.

However, Paint Shop Pro 7 will read PS files these days.

Mmm. Postscript documents. Real useful. NOT...

I know the feeling.

However, Paint Shop Pro 7 will read PS files these days.