PS Engineering PAC45D System Installation And Operation Manual page 20

Power must be cycled after selections are completed.
1-3: Alert polarity (ground or voltage trigger)
4-6: Alert type (edge or trigger)
7: Dimmer mode (5VDC or 28VDC)
8: Mic sensitivity (High noise applications)
9: Passenger HRTF enable (MultiTalker® audio)
10: Offside Transmit Mute
11: Copilot Control Head installed
12: Mission Observer Control Head installed
2.5.3.1 Alert Trigger Logic (1 – 3)
Switches 1-3 set alert logic. DOWN for active high, UP for active low.
2.5.3.2 Alert Trigger Type (Switches 4 – 6)
Switches 4-6 set alert type. UP for level triggered, DOWN for edge
triggered.
As shown: Alert 1 Edge Triggered, Alerts 2-3 Level Triggered (default
from factory)
2.5.3.3 Back light dimmer voltage (Switch 7)
Switch 7 sets dimmer mode. UP for 5V, DOWN for 28V
As shown: 28V dimmer (default from factory).
2.5.3.4 Microphone Sensitivity (Switch 8)
Switch 8 sets mic sensitivity. UP for low noise (standard), DOWN for high noise
environment.
As shown: High noise
2.5.3.5 Passenger Head Related Transfer Function (HRTF) Disable
(Switch 9)
Switch 9 enables HRTF mode for passengers. UP disabled, DOWN enabled.
Disable only if headsets are monaural.
2.5.3.6 Offside com audio active during transmit – (Switch 10)
When this switch is in the "UP" position, the receive audio on other radios is not muted
when one crew member transmits on the radio. This allows other crewmembers to
listen to other radios while one trasmits. (shipped from factory in this mode. Serial
Number DH01069 and above).
NOTE: This may result in crosstalk if multiple radios are tuned to close frequencies.
2.5.3.7 Copilot Control head (Switch 11)
Switch 11 indicates that a CTL45P is installed as a copilot control head.
UP for copilot CTL45P not installed, DOWN for copilot control head present.
2.5.3.8 Mission/Observer Control head (Switch 12)
Switch 12 indicates that a CTL45M is installed as the Observer/Mission control
head.
UP for CTL45M not installed, DOWN for observer/mission position control head
present.
200-045-0100
PS Engineering
PAC45 Audio Selector Panel and Intercom System
Installation and Operator's Manual
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January 2020