[RTTY] uh, what about spectrum?

[Bill Turner]

ORIGINAL MESSAGE:

At 08:10 PM 1/15/2006, Mike wrote:

>Since I use 170 Hz shift (bandwidth) and the DX stations I have
>contacted in and out of contests are also 170 Hz shift, the ARRL
>proposal should not impacting my operation in the 3520 - 3525 KHz
>area and below 7030 KHz and below 3580 KHz.  Am I not reading it
>correct?  Is there another ARRL or FCC document/proposal I should be
>looking at?


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Shift is not the same as bandwidth, as the mathematicians among us 
will be quick to point out. RTTY is a form of FM, and FM produces 
sidebands. The bandwidth is a function of both shift and baud rate.

I'll leave it to the pros to calculate exactly, but somewhere between 
250 - 350 Hz is required for 170 Hz shift.

Bill, W6WRT