Motorola PMLN5277 User manual

Heavy Duty Headset
User Guide
PMLN5277
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English
DESCRIPTION
The PMLN5277 Behind the Head Heavy Duty
Headset is intended for high noise
environments, to provide privacy and noise
isolation.
The headset consists of the following parts:
• Flexible Noise-Canceling boom
microphone
•Ear cup Push-To-Talk button
• Behind the Head support band
• Cloth strap over the head for additional
support
•Comfort Ear Seal with 24dB Noise
Reduction Rating (NRR)
•Push-To-Talk (PTT) / Voice Operated
Transmission (VOX) Switch
Figure 1.Behind the Head Model
VOX & PTT Switch
Over the Head Strap
Behind the Head Support band
Ear Seal &
Cloth Covers
Ear cup
Push-To-Talk
Button
Headset Windscreen
Mic O-ring
Noise Canceling Microphone
Flexible Boom Assembly
Cable
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PUSH-TO-TALK (PTT) OPERATION:
1. Always switch the radio OFF before
connecting the headset.
2. Attach the audio connector to the radio
taking care not to over tighten the fixing
screw.
Note: Once the headset has been installed the
radio speaker and the radio microphone
are both disabled. The user must speak
into the headset microphone and use
the headset speaker to listen to
incoming calls.
3. For Push-To-Talk operation, place the
PTT/VOX switch in the PTT mode.
Switch the radio ON. Care should be
taken not to set the volume level too
loud.
4. The flexible boom mounted Noise
Canceling microphone should be
positioned approximately 1.2 cm to 2.0
cm (½ inch to ¾ inch) from the user’s
lips. Adjust the flex boom assembly to
this position. Do not twist the Noise
canceling module with windscreen,
either clockwise or counterclockwise to
avoid poor noise cancellation
performance.
5. Press the Ear cup Push-To-Talk button
located at the top of the left ear cup and
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English
speak into the headset microphone to
check that the two-way communication
is working, the radio-in-transmission
light (LED) will be illuminated.
6. Release Push-To-Talk button to receive
transmissions.
7. Always switch the radio OFFbefore
disconnecting the headset.
VOICE OPERATED TRANSMISSION (VOX)
OPERATION:
1. Always switch the radio OFF before
connecting the headset.
2. Attach the audio connector to the radio,
taking care not to over tighten the fixing
screw.
Note: Once the headset has been installed the
radio speaker and the radio microphone
are both disabled. The user must speak
into the headset microphone and use
the headset speaker to listen to
incoming calls.
3. For VOX operation, place the PTT/VOX
switch in the VOX mode. Switch the
radio ON. Care should be taken not to
set the volume level too loud.
4. The flexible boom mounted Noise
Canceling microphone should be
positioned approximately 1.2 cm to 2.0
cm (½ inch to ¾ inch) from the user’s
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