Icom IC-F9011B Instruction Manual page 15

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PANEL DESCRIPTION
VOICE SCRAMBLER FUNCTION
Push to toggle the voice scrambler function ON and OFF.
COMPANDER KEY
Push to toggle the compander function ON and OFF.
The compander function reduces noise components from the
transmitted audio to provide clear communication.
USER SET MODE KEY
➥ Push and hold to enter user set mode.
• During user set mode, push this key to select an item, and
change the value or condition using push [CH Up]/[CH Down].
➥ Push and hold this key again to exit user set mode.
User set mode is also available via the 'Power ON function.'
Refer to p. 16 also.
OPT OUT KEYS
Push to control the output signal level from the optional unit
connector.
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TONE/NAC CH SELECT KEY
➥ While in the analog mode operation, push to select the
continuous tone channel using [CH Up] or [CH Down] to
change the tone frequency/code setting.
➥ While in the digital mode operation, push to select the NAC
channel using [CH Up] or [CH Down] to change the NAC
code setting.
➥ While in the mixed (digital and analog) mode operation,
push to select the continuous tone channel using [CH Up]
or [CH Down] to change the tone frequency/code setting.
Then push this key to enter the setting. After that, the NAC
channel selection screen appears. Select the NAC chan-
nel using [CH Up] or [CH Down] to change the NAC code
setting. Then push this key to enter the setting.