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Re: [linrad] QEX Sept/Oct 2003 & AOR's Newest Offering
- Subject: Re: [linrad] QEX Sept/Oct 2003 & AOR's Newest Offering
- From: "Rein A. Smit" <rein0zn@xxxxxxxxxxxxxxxxx
- Date: Fri, 05 Sep 2003 14:45:12 -0700
Hi Colburn,
Yes, indeed the Sept/Oct issue, part of a series of 4 articles in QEX addresses
Linrad for use on a so-called standard transceiver on HF ( mainly 7 MHZ )
Linrad is a version of a family of programs where audio from a receiver
( generic ) is processed for particular applications, such as high
selectivity, weak signal detection in in the case of Linrad effective noise
blanking. Emphasis in Linrad is 2 m EME but certainly not limited to it.
Other programs in this "family" are DSPblaster, Spectrascan and its many sisters
and to a certain extent AF9Y's program, And there are many others.
In short a soundcard is being used as digitizing element for the audio signal
and the rest of the processing occurs in the computer. Output is to a computer
screen and audio channel(s)
It is at this point for receiving only, and I suggest to view the articles in
question and/or the SM5BSZ as well as W3SZ WEB pages.
URL's and much other info regarding Linrad is on the URL I gave earlier.
http://www.nitehawk.com/linrad_dat/
There are links there to a ton of info on good design of receivers, low
phase noise LO's, intermod, intercept, etc etc The linrad articles list
many references on modern receiver design
Linrad up to this point is a framework of detection/processing routines and
a program for let's call it "self starters" and as the article states, experimenters
First and foremost it is running on Linux.
I myself, have been looking to Linrad for years and never got to
install Linux!!. Stupid perhaps but that is what happened,
Always reasons not to do it.
Well what ever the reasons were 3 or 4 years ago, most of them have gone.
installing Line is as easy as installing a microsoft program. But I am sure
it is still holding back potential users.
I also believe and know there are people who installed it and are not using it
I am certain there are many others on the board here who can tell you
and help you with getting Linda to run in one form or another. As I try to
tell it is not like being a program or a box. It requires some reading and
work.
The reason for my email earlier, addressed to Bob, who I thought, was trying
to locate decoder routines in the Linda source code ( public BTW ).
They are not there as far as I know.
regards
Rein Smit
Colburn wrote:
>
> On Fri, 2003-09-05 at 12:47, Rein A. Smit wrote:
> > Hi Bob and Colbern,
> >
> > Though I never had a long and deep look in Leif's software source code
> > package, I do not believe that any of those functions is implemented yet.
> > I am not even sure they are planned in the future.
> > 73 Rein W6/PA0ZN
>
> I may be mistaken, since I have yet to lay hands on a copy, but I have
> been led to believe that the Sept/Oct QEX contains an article that makes
> reference to the use of Linrad on a standard Ham transceiver and that
> the experiment included the exchange of digitized audio material.
>
> I am ready to be disappointed and shown to be wrong ... and then to be
> encouraged that such is indeed in the works.
>
> It seems to me that there would be a significant audience in Amateur
> Radio for a pc-based software-soundcard solution tfor the transmission
> and reception of digitized audio that required nothing but the addition
> of the mic and speaker connections from an existing rig.
>
> Have I confused multiple products and protocols or is that in fact part
> of what the just released QEX article discusses?
>
> --
> --
> ~~~
> o['|']o
> \~/
> | ```@ {Thanks! & 73 doc kd4e}
> | |__/
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Why Amateur Radio? Electronics, communicating, and helping others.
> Why Linux? Better than Microsoft & Apple, user controlled, it works.
> |
> Jesus === Freedom
> |
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