------------ ORIGINAL MESSAGE ------------(may be snipped) On Mon, 28 Sep 2015 10:08:07 -0400, W0YK wrote: >Why is RTTY different than CW and SSB? REPLY: Because the human ear has an amazing ability to fill in small gaps or errors in a message. RTTY is totally dependent on machine decoding. If there is an error caused by QRM or QRN, RTTY won't print correctly. 73, Bill W6WRT