PS Engineering PM2000 - Manual (Page 2)

PM2000 Operation/Installation Manual Page 2 Revision 2, August 1998
Introduction
Congratulations on your purchase of a
PM2000 intercom! We at PS Engineering wel-
come you to our family.
The PM2000 is a panel mounted, 4-place
intercom that offers features that make this the
intercom of choice by pilots who demand qual-
ity sound. This manual provides information on
the installation and operation of the PM2000.
Please read it completely before installation to
reduce the risk of damage to the unit and maxi-
mize your enjoyment of its use.
Description
The PM2000 is a 4-place, STEREO, panel
mount intercom with individual volume and
VOX circuits for the pilot, copilot, and passen-
gers 1 & 2.
Although there is only a single control
knob for the volume and squelch circuits, when
an adjustment is made to the volume control,
eight output amplifiers are being changed si-
multaneously. Likewise, when the squelch con-
trol knob is adjusted, three individual squelch
circuits are being changed at the same time.
A 2-position mode switch allows the pilot
to select one of two configurations. The "ALL"
mode places all headsets on a party line, hear-
ing intercom conversation and the aircraft radios.
In the "ISO" mode, the pilot is isolated from
all others and is connected to the aircraft radio
allowing un-interrupted radio communications.
The passengers continue to communicate with
themselves without distracting the pilot.
The PM2000 has an automatic fail-safe in-
terconnect to the aircraft radio. If power is dis-
rupted to the intercom for any reason, an internal
relay will connect the pilot's headset to the air-
craft radio, permitting continued radio communi-
cations.
A 2-color LED glows green when power is
on and changes to red when someone presses
their Push To Talk.
Provision for an entertainment input allows
the pilot, copilot and passengers the option to
listen to music during flight. During intercom or
aircraft radio activity, this music automatically
mutes to permit easy communications. When the
activity ceases, the "Soft Mute™" circuit gradu-
ally returns the music to the original listening
volume. By depressing the mute control (located
on the VOX control) once, it is possible to have
the music remain at the unmuted level.
During various phases of flight, the degree
of importance of the aircraft radio will vary. Be-
cause the "ISO" mode directly connects the pilot
to the aircraft radio, select the "ISO" mode when
the pilot must have top priority on radio trans-
missions.
Both pilot and copilot have transmit capa-
bilities. The PM2000 only allows the audio of
the person who presses their PTT to be transmit-
ted over the aircraft radio. If both pilot and copi-
lot press the PTT at the same time, the copilot
will override. Placing the unit in fail-safe
(turning off) will return control to the pilot posi-
tion. When either pilot or co-pilot presses PTT,
Front Panel of PM2000
Revision 2, August 1998 Page 7 200-195-0002
may need several rotations before the adjust-
ment is complete. When the aircraft radio be-
comes active, the music should mute.
Warranty
PS Engineering, Inc. warrants this product
to be free from defect in material and workman-
ship for a period of one year from the date of
installation. In certified aircraft, an FAA Form
337 must accompany the warranty card for this
warranty to be in effect. During the warranty
period, the unit must be returned to PS Engi-
neering, Inc. and, at their option, it will send a
replacement at no charge.
This warranty is not transferable. Any im-
plied warranties expire at the expiration date of
this warranty. WE SHALL NOT BE LIABLE
FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES. This warranty does not cover a
defect that has resulted from improper or unrea-
sonable use or maintenance as determined by
us. This warranty is void if there is any attempt
to dissemble this product without factory
authorization.
This warranty gives you specific legal
rights, and you may also have other rights
which vary from state to state. Some states do
not allow the exclusion of limitation of inciden-
tal or consequential damages, so the above limi-
tation or exclusions may not apply to your state.
Service
Call PS Engineering, Inc. at (423) 988-
9800 and ask for a technician. He may be able
to diagnose the problem and offer a solution
without the possible need for returning the unit.
If the unit does need servicing, ship product in
UPS approved packaging to:
PS Engineering, Inc.
Attn.: Service Department
9800 Martel Road
Lenoir City, TN 37772
(423) 988-9800
FAX (423) 988-6619
Appendix A
PTT Modifications
When received from the manufacturer, af-
ter-market PTT switches open the microphone
audio path to the "ring" connection of the PTT
mic plug. When the PTT is between the inter-
com and the headset, the intercom function will
not work until the PTT switch is depressed. A
simple modification can be performed to allow
proper intercom operation. NOTE: This modi-
fication does not alter normal operation.
Procedures For David Clark's PTT
1 Unscrew the round black plastic cover from the
jack.
2 Connect the joined black wires to the red wire.
3 Replace the round black plastic cover.
Procedures for the Telex's PT-200
1 Unscrew the round black plastic cover from the
jack.
2 Cut the red wire in the middle of the wire
3 Strip both ends of the insulation
4 Solder the two ends to the ground lug to the
PTT jack
5 Replace the round black plastic cover
Procedures for the Telex's PT-300
1 Unscrew the round black plastic cover from the
plug jack