[CW] Bandwidth Chart

Mon, 15 Mar 2004 05:58:50 EST

In a message dated 3/15/04 12:11:04 AM Eastern Standard Time, [email protected] 
writes:

> WPM    Bauds       Bandwidth                 Bandwidth
>                            (non-fading circuit)    (fading circuit)
> 10            8.34         25 Hz                        41.67 Hz
> 20          16.67         50 Hz                        83.37 Hz
> 30          25.00         75 Hz                        125.00 Hz
> 40          33.34       100 Hz                        166.67 Hz
> 50          41.67       125 Hz                        208.34 Hz
> 60          50.00       150 Hz                        250.00 Hz
> 
> 120 WPM would be 100 baud, have a 300 Hz (K=3) and 500 Hz (K=5) bandwidth.
> 

The above numbers are correct only if the rise and fall times are readjusted 
when the speed is changed. If the transmitter's rise and fall times (and 
shapes) is adjusted for 60 wpm operation, but only 10 wpm is sent, the transmitted 
bandwidth will still be the same as for 60 wpm.

73 de Jim, N2EY

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