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21FT-8900R Operating Manual
SELECTING THE FREQUENCY BAND
Press and hold in the “leftDIAL knob to move the operating band on the “left” band
144
MHz
350
MHz
430
MHz
850
MHz
29
MHz
50
MHz
144
MHz
......
Press and hold in the “rightDIAL knob to switch the operating band on the “right” band
between the 144 MHz and 430 MHz.
1
)
You may select the operating band on the “Main” band by pressing and holding
in the microphone’s
[
P1
]
key for 1/2 second.
2
)
The FT-8900R may be configured to operate either in a V-V or U-U mode, if needed.
BASIC OPERATION
VHF-VHF
(
V-V
)
Operation UHF-UHF
(
U-U
)
Operation
Notice
The FT-8900R may receive very strong signals on the Image frequency, and/or the receiver
sensitivity may be somewhat reduced by the combination of the “Left” and “Right” band
frequencies while Dual Receive operation is engaged.
If you experience interference that you suspect may be coming in via an “Image” path, you may
calculate the possible frequencies using the formulas below. This information may be used in the
design of effective countermeasures such as traps, etc.
(“Left” band freq. ± 45.05 MHz) x n1 (“Right” band freq. ± 47.25 MHz) x n2 =
Left” band IF freq. or “Right” band IF freq.
(“Left” band 28 MHz freq. + 45.05 MHz) x n = “Right” band freq.
(n is an integer: 1, 2, 3, …)
23


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