
PS Engineering
PAC45J Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-045-2000
Page 2-7
November 2020
2.7 User Adjustments
The PAC45J is factory set for typical installation. However, several installation adjustments are avail-
able. No computer is required.
2.7.1
Unswitched Audio Level
Unswitched inputs one through five are installation adjustable through the side of the PAC45J unit.
2.7.2
Adjustments
On the side of the PAC45J/HUB45AR are 15 installation adjustment potentiometers.
These are
ALL 30-turn pots.
1.
Unswitched input 5 volume (J452-57)
2.
Unswitched input 4 volume (J452-36)
3.
Unswitched input 3 volume(J452-56)
4.
Unswitched input 2 volume(J452-35)
5.
Unswitched input 1 volume (J452-55)
6.
Speaker Amplifier Volume (J452-41)
7.
PA Amplifier Volume (J452-42)
8.
Copilot and observer speaker output (if configured) and satcom telephone output volume
(J452-38)
9.
Cockpit Voice Recorder Volume (J452-60, 61)
10.
External PA Sidetone (J452-37)
11.
External COM 1 Sidetone (J452-33) See Section 2.7.7.1 for details
12.
External COM 2 Sidetone (J452-34) See Section 2.7.7.1 for details
13.
Alert volume (adjusts the level of the internal audio alerts and annunciations generated by
the PAC45J)
14.
Green LED backlight level, see §2.5.3
Volume
CP/OBSVR Speaker & Satcom Volume