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Operation
About SSB
Your GRANTXL can communicate in two different modes: AM and single-sideband
(SSB). In AM mode, you can receive and transmit standard Amplitude Modulated CB
signals in the assigned 40 CB channels. Although this may work well for most of your
communications, you also have the option of receiving and transmitting 80 single-
sideband channels (40 upper sideband and 40 lower sideband).
Since SSB (single-sideband) modes are allowed to transmit 12 watts PEP power, you
can communicate at greater distances than with conventional AM mode operation. Be-
cause not all the CBers are equipped with SSB mode, you can always select AM mode
for standard communications.
The standard AM signal is composed of a carrier frequency and two other frequencies
(sidebands) carrying the audio infonnation. In single-sideband communications, the
carrier frequency and one of the sidebands are suppressed, and only the other sideband
is received and transmitted. You can operate on either USB (upper sideband) or LSB
(lower sideband). With SSB, you gain increased effective power without losing any in-
fonnation. You also gain 80 more channels for communications.
To communicate with another transceiver in the SSB mode, you must both be on the
same sideband, USB or LSB.
If you hear a "garbled" signal on your CB, you may be listening to SSB transmission.
Set the Mode Selector to LSB and listen. If the signal is still garbled, or has disap-
peared, try USB. Once you are in the correct mode, use the Clarifier Control to "fine-
tune" the signal. You will now be able to communicate with the transmitting party.
If you are having trouble with adjacent interference, or if too many stations are on the
same frequency, you may want to suggest SSB mode to the station you are communicat-
ingwith.
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