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Operation
• See “Controls and Indicators” (page 2) for button, knob, and
key positions.
• When you turn On your MH 120 just after purchasing, it is
automatically tuned to channel 16, the United States Coast
Guard frequency for distress, safety, and calling.
• When you press any button (except
PTT
), a short tone sounds.
Turning On the Unit and Setting Squelch
Before you turn On the unit, turn the
squelch (
SQ
) knob fully counterclockwise.
Then, turn On the unit by turning the
Volume/Power (
VOL
) knob clockwise
until you hear a hissing sound.
Turn the
SQ
knob clockwise, just until the
hissing sound stops. Use the knob to adjust
to the desired squelch level. Think of the
squelch control as a frequency gate which
controls access to weak or strong signals
depending on its setting.
• To listen to a weak or distant station,
turn the knob counterclockwise. If reception is poor,
turn it clockwise to cut out weak transmissions.
• If the squelch control is adjusted so that you continually hear a
hissing sound, the unit will not scan properly.
To turn Off the unit, turn the
VOL
knob counterclockwise until
it clicks.
4
3
2
1
10
SQ
SPKR
MIC
VOL
Noise
Weak Signals
Medium Signals
Strong Signals
UT899BH (MH120)_ENG 3/15/05 4:24 PM Page 10