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Re: [CQ-Contest] band plan definition - LSB vs USB

To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] band plan definition - LSB vs USB
From: Richard Ferch <ve3iay@storm.ca>
Date: Wed, 03 Oct 2012 16:03:55 -0400
List-post: <cq-contest@contesting.com">mailto:cq-contest@contesting.com>
In SSB modes, an amateur transceiver's dial reading is the suppressed carrier frequency, not the actual transmitted frequencies.

If your radio's dial is on 14349 USB and you speak into the microphone, your actual transmitted frequencies will include significant energy in the range from approximately 14349 kHz to 14352 kHz. To the best of my knowledge it is illegal anywhere for an amateur to transmit significant signals between 14350 kHz and 18068 kHz. Therefore setting your dial on 14349 and transmitting a USB voice signal is not permitted, regardless of what region or country you are in and regardless of band plans.

The upper limit for an amateur transceiver's dial reading in USB should be 14347 on 20m, 21447 on 15m and 29697 on 10m, in order to ensure that the actual transmitted signals are entirely below 14350 kHz, 21450 kHz and 29700 kHz respectively; likewise for 12m and 17m.

73,
Rich VE3KI


ES5TV wrote:

So is it allowed to work USB on 14349 what concerns the band plan?

IARU Region 1 and Region 2 band plans both also say:

*Transmitting frequencies: The announced frequencies in the band plan are
understood as “transmitted frequencies” and not those of the suppressed
carrier!*

What does it mean? Does it mean that furthermore, it is stressed that 14349
is OK as it is the transmitted frequency?

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