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Page 9
SYSTEM SPECIFICATIONS
Audio Control Unit (ACU)
Audio Connections: RA2 Module (one per two rooms)
Inputs: electronically balanced 20K Impedance (unbalanced 10K), 3 pin screw termi
nals
Outputs: 600 ohm transformer coupled (balanced) 3 pin screw terminals
Audio Connections: MP Module (music/page module)
Inputs: 600 ohm transformer coupled (balanced) 3 pin screw terminals
System Level adjust range: +7 dB to -20 dB
Input Trim Level Adjust Range: (Page and Music input level adjust trim pots) +2.5 to -7.5 dB.
Tie line output: 600 ohm transformer coupled (balanced) 3 pin screw terminals
Audio Gain:
Music (with respect to input level)
Volume Reset: 0 dB +/- 1dB
Full Down: -18 dB +/- 1 dB
Full Up: +4 dB +/- 0.5 dB
Local Input (with respect to input level)
Volume Reset: 0 dB +/- 1dB
Full Down: -18 db +/- 1 db
Full Up: +4 db +/- 0.5 db
Page Input: 0 db +/- 1 db
Maximum Output Level: +20 dBm
Noise Floor:
-75 dBm typical. Conditions: Full mix, Mixer Enables on, Local Inputs off,
input open, outputs 600 ohm terminated
-70 dBm typical. Conditions: Full mix , Mixer Enables on, Local Inputs on,
Volume set to 0 dB. inputs open, outputs 600 ohm terminated
Crosstalk:
-85 dB typical. Conditions: No mix, Mixer Enables on, Local Inputs on,
Volume set to 0 dB. +10 dBm 1KHz. signal into any input, measure any output
-80 dB typical. Conditions: Full mix, Mixer Enables on, Local Inputs on,
Volume set to 0 dB. +10 dBm 1KHz. signal into any music or page input.
Size:
19 inches wide, 14 inches high (8RU), 13 inches deep
Mounting:
Standard rack mounting, usually located 55 inches above finished floor.
