Envelope-to: dave@picks.force9.co.uk
Delivery-date: Tue, 19 Apr 2005 22:50:32 +0100
Message-ID: <BAY102-F151D05033D4E0B8A8ECB06CF2A0@phx.gbl>
In-Reply-To: <000401c544ea$07cae2a0$e21686d4@erica>
From: "Laurence KL1X" <hellozerohellozero@hotmail.com>
To: rsgb_lf_group@blacksheep.org
Date: Tue, 19 Apr 2005 13:50:07 -0800
Mime-Version: 1.0
Subject: RE: LF: Re: XDW on "Alien space invader mode"
Content-Type: text/plain; charset=windows-1252; format=flowed
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Content-transfer-encoding: 8bit

Its interesting to see how Argo places a fast swept signal into various 
"bins".

You would have thought that the carrier density (If Im allowed to use that 
word) spread  time would produce a far more broken and diffuse pattern; in 
reality dependant on sweep speed it will cause Argo to brighten up various 
lines but still produce enough visualisation to improve detection overall(?) 
The faster the sweep rate the more lines between sweep limits..

Dependant on fade or noise at that instance my general impression is that it 
does -and certainly as you say Peter aid to detection - but I think worms, 
sine, triangular and other blimps are better that just straight lines!

I cant get my synth to sweep 0.4Hz over 120 secs or longer at the moment but 
Ill have a look at the DDS solution.

Laurence

>From: "g3ldo" <g3ldo@ukonline.co.uk>
>Reply-To: rsgb_lf_group@blacksheep.org
>To: <rsgb_lf_group@blacksheep.org>
>Subject: LF: Re: XDW on "Alien space invader mode"
>Date: Tue, 19 Apr 2005 14:20:23 +0100
>
>
>
>Hi Laurence
>
> > XDW on 137.7752/137.7756 Khz DFCW dot 90  - Dash High
> >
> > Dot is being swept from 137.7752 to 137.7755  KHz and back at a rate of 
>3
> > sec per "cycle"
> >
>
>In the early days of QRSS I was using an analogue signal generator as a
>driver. This was somehow frequency modulated so that the frequency varied 
>up
>and down during key down. This had the effect of causing the dots and 
>dashes
>on the readout to look like worms - much ridiculed at the time but it made
>for a very identifiable signal under marginal conditions.
>
>Peter G3LDO
>
>