Piper Malibu PA-46-310P Pilot Operating Handbook page 532

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~ENGINEERING ®
1 ~
INCORPORATED
Section II Operation
PM3000 (11931 & 11933)
Adjusting the Volume (1)
The PM3000 volume control knob adjusts the loudness of the inter-
com and music only. The volume control on the PM3000 does not
affect the volume level of the aircraft radio. This allows the aircraft
radio•and intercom volume _to be balanced independently. The vol -
ume control affects the music level for the pilot and copilot posi-
tions.
By turning the control clockwise, the audio level will increase. The
PM3000
has individual output amplifiers for each headset in the
system and provides plenty of audio output power. NOTE: Volume
level will not change with the number of headset installed.
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~CREW
Volume
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Squelch
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PM3000 w/ Crew (11932 or l 1934)
202-193-0001
4
PM3000-Pilot Guide
&
User Manual
J
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~ENGINEERING ®
1 ~
INCORPORATED
Music# 2 passenger volume in CREW mode (11932 and 11934)
version is a fixed level, and conh·olled locally by the headphone vol-
ume control or music device.
Adjusting the Squelch Control (2)
This VOX operated intercom keeps all microphone channels off
(silent) while the pilot, copilot or passengers are not speaking. This
reduces background noise from the aircraft. Only when someone
speaks will their microphone turn on, allowing the audio to pass
through the system. Although there is just one squelch control, there
are actually three separate squelch threshold circuits. One circuit
each for the pilot, copilot, and passengers. Only the microphone ac-
tually in use is open, reducing noise in the system.
With the engine running, set the squelch control knob by slowly ro-
tating the squelch control knob clockwise until you no longer hear
the background noise in the earphones. When the microphone is
positioned properly near the lips, normal speech leve ls sho uld open
the channel. When you have stopped talking, there is a delay of
about one half second before the channel closes . This prevents
squelch closure between wo rds, and helps eliminate choppy inter-
com conversations.
Indicator LED (3)
The green LED in the center indicates green when the unit is turned
on, and changes to red during h·ansmit by either the pilot or copilot.
Mode Select (4)
The center switch is a mode control that allows the pilot to tailor the inter-
com function to suit flight conditions. Regardless of configuration, the
pilot wi ll always hear the aircraft radio. NOTE: If there is a power failure
to the PM3000, or if the power switch is turned off, the copilot will not
hear the aircraft radio. Only the pilot is connected directly to the aircraft
radio.
ISO (Up Position) : The pilot is isolated from the intercom and is connected
only to the aircraft radios. He wi ll hear the aircraft radio reception (and
sidetone during radio transmissions). Copi lot and passengers will hear
themselves and music but not the aircraft radio traffic.
ALL (M iddle position): All parties will hear the aircraft radio, intercom,
and music. However, during any ICS conversation, the music vol-
ume automatically mutes. The music volume increases gradually
PM3000 Pilot Guide
&
User Manual
5
202-193-0001