I can't fathom the reason for doing that, but if the tone frequencies
are pseudo-randomly generated and then modulated by either on/off keying
or some other way, you will have a spread spectrum system, similar to
what is done in the ROS 2200 Hz-wide modes. The tones in a ssb
transmitter simply generate rf carriers, so varying the tone frequencies
is no different than varying a vfo frequency as far as the outside world
sees. The distinction in spread spectrum is the generation of the tone
frequencies independently of the data. I.e., you first generate a tone
frequency in a psudo-random manner and then convey intelligence by
modulating the resulting rf carriers.
73 - Skip KH6TY
Ralph Mowery wrote:
Correct but you still have not answered my question. Indeed If I
use one tone and key it on / off I have a cw transmitter, transmitting
on the VJO frequebcy = or - the audio frequency.
What do I have if I just change the tones in a random fashion?
73 Rein W6SZ
If a total random fashion, then you have a bunch of junk. It will
not convey any useful information and probably illeagle in the ham bands.
There must be order to it to convey any useful information.
