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4
BASIC OPERATION
■ MAIN and SUB bands
The IC-910H has dual bands: 144 MHz and 430(440)
MHz. These bands can be assigned to the MAIN and
SUB bands for operating convenience.
Each MAIN and SUB bands have independent fea-
tures.
The MAIN band is the operation for both transmit and
receive, and is displayed in the upper area of the func-
tion display. The SUB band is the operation for only re-
ceive, and is displayed in the lower area of the function
display.
Simultaneous receive on both the MAIN and SUB
bands is possible, however the transmission can
only be transmitted on the MAIN band— not on the
SUB band.
In the case of satellite operation mode, the SUB
band is used for the transmission band.
DD
Exchanging the MAIN and SUB bands
The function display shows both the MAIN and SUB
band frequencies and both bands can receive signals
simultaneously.
Assign 144 MHz or 430(440) MHz band, whichever
band you want to transmit or be called on, as the MAIN
band.
➥ Push [M/S] to exchange the MAIN and SUB bands.
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Accessing the SUB band
Normally, any operations, such as tuning, operating
mode selection, memory channel selection and pro-
gramming, etc., are performed on the MAIN band.
However, these operations can be performed on the
SUB band by using the SUB band access capability.
➥ Push [SUB] to switch the SUB band access capa-
bility ON and OFF.
•“SUB” indicator appears while the SUB band access ca-
pability is activated.
•Even during SUB band access, transmission cannot be
made on the SUB band.
