[RTTY] RTTY Newbie Questions

[Al Kozakiewicz]

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