[CQ-Contest] Band edges?

[Pete Smith]

I have long understood that the frequency displayed by a modern transceiver
is the frequency of the suppressed carrier.  If you are operating on USB
CW, then the carrier is shifted up (for example, 800 Hz) into the passband
of the crystal filter, and the actual center frequency is display +800 Hz.
In that case, you would be safe with a displayed frequency of 21000.0 or
even 20,999.8 and a human CW speed.  If, on the other hand, your rig
generates CW in the LSB position, then you have to indicate at least the
lower band-edge frequency  plus the offset plus the CW signal width at the
current data rate.

I believe the same is true for SSB, except that you need to be inside the
band (indicated) by at least the bandwidth of your SSB filter, if the band
edge is the same as the SSB mode (for example, 14350 - filter bandwidth for
USB).  I know that strictly speaking stations operating this close to the
bvandedge will probably have audible signal outside the band as well, but
that it is probably at or below the FCC threshhold for out of band emissions.

Am I wrong? 

73, Pete N4ZR

Contesting is ... Extreme Radio

The World Contest Station Database 
is back up and running at
http://www.qsl.net/n4zr 



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