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18 FT-7900R OPERATING MANUAL
The optional MH-42B6JS is similar to the MH-48A6J, but the MH-42B6JS does not include
a DTMF keypad and its illumination switch.
PTT Switch
Press this switch to transmit, and release it to receive.
.
[
ACC
]
/
[
P
]
/
[
P1
]
/
[
P2
]
Buttons
[
ACC
]
button:
This button replicates the functions of the
front panel
[
BAND
(
SET
)]
key.
While operating on the VFO mode, press this but-
ton momentarily to toggle the operating band as fol-
lows:
144 MHz 250 MHz 350 MHz
430 MHz 850 MHz 144 MHz
......
In the Memory mode, press this button momentarily to
activate the “Memory Tune” function.
Press and hold in this key for 1/2 second to enter the Set
(“Menu”) mode.
[
P
]
button:
This button replicates the functions of the front panel
[
V/M
(
MW
)]
key.
Press this button momentarily to switch the frequency control among the VFO,
Memory System, and Home channel.
Press and hold in this button for 1/2 second to transfer the VFO contents into a
Memory register.
[
P1
]
button:
This button replicates the functions of the front panel
[
TONE
(
REV
)]
key.
Press this button momentarily to change the Tone Squelch mode: ENC (CTCSS
Encoder), ENC.DEC (CTCSS Tone Squelch), or DCS (DCS) operation.
Press and hold in this key for 1/2 second to reverse the transmit and receive fre-
quencies during split-frequency (i.e. “Repeater”) operation.
[
P2
]
button:
This button replicates the functions of the front panel
[
LOW
(
ACC
)]
key.
Press this button momentarily to select the transmitter power output level (“LOW”,
“MID2”, “MID1”, or “HIGH”).
Press and hold in this key for 1/2 second to recall the Weather Broadcast Channels.
You can program the
[
ACC
]
,
[
P
]
,
[
P1
]
, and
[
P2
]
buttons for other functions, if desired.
See page 62 for details.
MH-42B6JS MICROPHONE
20


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