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?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|