[RTTY] RTTY Newbie Questions

[Dave Hachadorian]

I was running a 24" Panadapter on each radio throughout the 
Roundup.  It was very obvious which signals were clean, and which 
were excessively wide.  I would say 5% were excessively wide.  A 
few were grossly wide.  A number of non-rtty digital signals were 
also grossly wide.

Dave Hachadorian, K6LL
Yuma, Arizona




-----Original Message----- 
From: Al Kozakiewicz
Sent: Tuesday, January 08, 2013 11:39 AM
To: iain macdonnell - N6ML
Cc: Eric Rosenberg ; rtty at contesting.com
Subject: Re: [RTTY] RTTY Newbie Questions

It was meant to be provocative.  Every complaint I've "seen"  of 
splatter with a modern DSP generated FSK signals has been due to 
the complainers receiver, often an artifact of the same high end 
DSP design that generated the signal!

The IC-756 Pro III, for just one example, will make it appear 
that strong signals have splatter 2 kHz away when using a narrow 
filter. Broaden out the filter and the "splatter" disappears!

Al
AB2ZY

________________________________________
From: dseven at dseven.org [dseven at dseven.org] On Behalf Of iain 
macdonnell - N6ML [ar at dseven.org]
Sent: Tuesday, January 08, 2013 1:17 PM
To: Al Kozakiewicz
Cc: Eric Rosenberg; rtty at contesting.com
Subject: Re: [RTTY] RTTY Newbie Questions

On Tue, Jan 8, 2013 at 8:18 AM, Al Kozakiewicz 
<akozak at hourglass.com> wrote:

> 2- How does one monitor their own (FSK) signal to see how good 
> or bad it is.
>
> **
> A key question I would have is:  if you find out it's bad, what 
> are you going to do about it? Buy a new radio?  The only way to 
> tell would be an "old time" scope on the RF output of your 
> transmitter.

That strikes me as a rather odd perspective. If your signal is 
bad
(splatting, causing QRM, etc,), you should:

1) STOP TRANSMITTING
2) Fix it

There were WAY too many splattery signals in the RU, and some 
with
horrible buzz and noise covering multiple kHz (probably AFSK with
audio problems). We need to be more aware of the cleanliness of 
our
RTTY signals, IMO.

73,

    ~iain / N6ML
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