PS Engineering PAC24 Installation Manual - Manual (Page 29)

PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0010 Page 3-5 Rev. 24, Dec. 2013
For optimum microphone performance, PS Engineering recommends installation of a Microphone
Muff Kit from Oregon Aero (1-800-888-6910). This will not only optimize VOX performance, but
will improve the overall clarity of all your communications.
Table 3-1 Mic Muff ™ Part Numbers
Manufacturer Model Mic Muff™ Part Number
Bose Dynamic
Electret
M87 Dynamic 90010
90015
90020
David Clark H10-30
H10-20, H10-40
H10-13.4 90010
90015
90015
Lightspeed 15K & 20K 90015
Peltor 7003
7004 90010
90015
Pilot 11-20 & 11-90 90015
Sennheiser 90015
Telex Airman 750
AIR3000 90015
90010
3.7.2 Volume Control (3)
The volume control is a concentric knob. The inner knob adjusts the loudness of the intercom for the pilot
(in single panel installation) and the outer knob controls copilot and passenger volume. It has no effect on
selected radio levels or music input levels.
In dual installation, the inner knob controls the main volume (the person connected to the audio panel)
and the outer knob controls the passengers.
NOTE: When a panel mounted IntelliPax (11606) expansion unit is used, both the PAC24 and the panel
mounted expansion volume controls are active. We recommend turning the IntelliPax volume control
completely CCW (lowest) and then using the PAC24 panel volume control to adjust the passengers’ vol-
ume. If the remote IntelliPax expansion (11606R) is used, the PAC24 volume control is used to adjust the
passengers’ volume.
3.7.3 Intercom Modes (5)
The lower switch on the left side of the audio panel is a 3-position mode switch that allows the crew to
tailor the intercom function to best meet the current cockpit situation.
3.7.3.1 Single Installation Intercom Modes
I SO : (Up Position): The pilot connected to the PAC24 is isolated from the intercom and is connected only
to the aircraft radio system. He will hear the selected aircraft radio reception (and sidetone during radio
transmissions). The copilot will hear passengers’ intercom and entertainment, while passengers will hear
copilot, intercom and entertainment.
A LL : (Middle Position): All parties will hear the aircraft radio and intercom. All will hear entertainment.
During any radio or intercom communications, the music volume automatically decreases. The music vol-
ume increases gradually back to the original level after communications have been completed.
C REW (Down Position): Pilot copilot and passengers are connected on one intercom channel and have
access to the selected aircraft radios. They may also listen to Entertainment. Because the single panel,
non-expansion PAC24 (and KMA 24H) uses the same output for the copilot and passenger, “Crew” mode
is not possible (Unless expansion module, p/n 11606 is used)