[RTTY] Band Plan Points

[George Henry]

I'll chime in on this one...  I tested the PC-ALE program a couple of years 
ago and, while its busy-channel detection worked well for other ALE signals, 
it would key up over just about every other type of signal I fed it, 
including SSB voice, RTTY, SSTV, and CW.  Makes sense, since ALE was 
designed for dedicated governmental/military communications channels, not a 
non-channelized multi-modal environment like the amateur bands. Don't know 
whether the current version has improved on it or not, as I refuse to join 
the HF-Link Yahoo group just to be able to download it.

The client version of RMS Express for Winlink 2000 will warn you that a 
channel is busy, but you can force it to transmit anyway.  I have heard a 
gateway station on 14.084 respond to queries while RTTY signals were 
present, but that could be the "hidden transmitter" effect.

George, KA3HSW


----- Original Message ----- 
From: " Dave AA6YQ" <aa6yq at ambersoft.com>
To: "'Terry'" <ab5k at hotmail.com>
Cc: <rtty at contesting.com>
Sent: Saturday, March 29, 2014 5:40 PM
Subject: Re: [RTTY] Band Plan Points


> Re " The busy frequency detectors deployed by unattended digital stations 
> are not effective."
>
> What leads you to this conclusion?
>
>       73,
>
>             Dave, AA6YQ
>