[RTTY] Hints and tips on how to file comments on RM-11708

[Kok Chen]

On Nov 24, 2013, at 6:28 PM, Joe Subich, W4TV wrote:

> If it is 2.4 KHz wide, it can not be legal ... how can one square
> 2.4 KHz occupied bandwidth with a rule that states a combined
> criteria of 1000 Hz and 300 baud which works our to 1500 Hz?

Joe, it looks like you are supporting what the ARRL has been saying about Symbol Rates :-).

By adding more tones (thus more bits per symbol) you can make the bandwidth as wide as you want, even if the Symbol Rate is fixed.  The bandwidth is therefore unlimited by the current rules.  The bandwidth of a signal is definitely not limited by Symbol Rate.  It is however related to SNR and the data (bit) rate (Shannon's Noisy Channel Theorem). 

This is precisely why I have been saying why I don't care if the Symbol Rate is raised, but I myself think it is unwise to use high symbol rates in a Rayleigh channel with multipath.

73
Chen, W7AY