Quote:
On 2003-01-13 14:29, cable wrote:
why should it be modulated ??
an EM wave may act remotely on an antennae, even if it's a non modulated CW.
we can detect the presence/absence of a pure CW.
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Some sort of modulation scheme is required to transfer information. If I understand your example correctly, you're suggesting switching from CW to say CCW polarizations. This is modulation. This would be an example of "spatial" modulation as opposed to "temporal" modulation we are familiar with from AM and FM radio.
<font size=-1>[ This Message was edited by: Wiley on 2003-01-13 18:02 ]</font>