PS Engineering PM1200 Pilot's Manual page 3

W ith the installation complete,
lLU1l
the
P:\'11200 on by piessing the p ilot's volume knob.
This also engages the automatic fail-safe system.
The pilot's volume control does .!lQ.Lcontrol the
volume of the aircraft radio, allowing an addi-
tional degree of aircrali radio listening flexibility.
NOTE: Blind mounted
units
will have same
functions, but the controls w ill h e located on
the panel. C onsult your installer for details.
On/Off and Volume
Press the left hand knob to tum the unit on
an d off .. T his
is
a lso th e f.<til-safe position. When-
ever the w1it is off, or power removed,
the
pilot's
head set is connected directly to the aircraft audio
system.
The p ilot vohm1e control knob adjusts the
loudness of the u1tereom and music for the pilot's
headset only.
It has
no effect on aircraft radio
volume leveL The co-pilot volume control ad-
justs the intercom volume for the copilot.
The green
LED will ilhunin::~te
wh en p ower
is on, and tum red
in
transmit.
Squelch
The PM 1200
in ~,;orporatcs
botl1 a Push-to-talk
intercom, and PS .Engineering's rc:volutio.ruuy
l melli-
Vox7M. No adjustment of the squdd1 control is re-
quired, Th.rough individuol signal processors, the ambi-
ent noise appearing Lll bolh microphones is constantly
being s.arnplcd. Non-voice signals are blocked. When
someone speaks, only their micropl10ne circuit opt::us,
placing their voice
on the iutc:rcom.
NOTE:
TI1e headset microphone must be placed
·within
Y:.
inch of your lips, preferably agaiust tl1em. lt is also
a good idea to ket:p d1e microphone m1t of a direct
wiud path. Movi11g your I1ead through a vent air stream
may
eallSe the
JnlelliVox 7
M
to open mornentari
ly. TI1 is
is nonnal.
For opti m um microphone performance, PS Engineer-
ing, Inc. recommends instal/a/ion
of
a
Microphone
Muff
Kif
from Oregon Aero (1-800-888-691 0). This
will
not only optimize
VOX
performance,
but
will improve
the overall clan'ty of all your communications
Push-to-Talk Intercom
Under extremely high noise condition s, it
may be desirable to have a push to
taJJ<
(P1T)
intercom mode, instead ofrcly ing on voice-
activation (VOX).
In
tl1e PM 1200 the PTT inter-
com capability is user selectable .
To activate the PTT-lCS Mode, push the
PTT-ICS ovcn·ide s·witch
on
the copilot volume
controL
Using the
separate
ICS . l 'TT (not the
radio
PIT)
button for pilot and one for
the
copi-
lot w ill allow their voice on the intercom.
Intercom Mode Select
The center switch is
a
m ode control
lb.at
al-
lows the pilot
to
tailor the intercom. fu nction to
su it flight conditions. R egardless of con ligura-
tion, the pilot will a lways hear the aircraft radio .
NOTE:
lfthere
is
a power failure to the
PM1200, or iftl1e power swi.tch
is
tumed off,
the copilot w ill not hear the aircraft radio.
Only
the pilot is connected directly to the aircraft ra-
dio.
ISO (Up .Position): The p. i lot is isolated
fi·om the intercom and is coJmectcd only to
the
aircraft radios. He w ill hem· tlle aircraft radio
January 2003
Page
3
202-196-0100