QSC Audio Amplifier Network Monitor CM16a - Manual (Page 34)

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Power amplifier management
Signal monitoring buses 1
(per CM16)
Number of Channels 4
Internal signal tap points
Pre-fader input signal 16
Post-fader input signal 16
Power amplifier output 16
Monitor input Mixed with tap point signal at
unity gain
Nominal level +4 dBu
Maximum level +21 dBu
Input impedance 10 kOhm balanced
Configuration Electronically balanced, shield
connected to chassis
Common-mode rejection Typical, >50 dB, 20 Hz - 20 kHz
Worst case, >40 dB, 20 Hz-20kHz
Power amplifier interface
Compatibility QSC Data Port equipped amplifiers
Connector and cable
HD-15 VGA cable, 2 meters length
qualified (for longer runs, contact
QSC’s Technical Services Department)
Amplifiers 16 amp channels grouped in pairs
Amplifier status monitor
Clip indicator Senses channel clipping
Bridge mode status Sense bridge mode setting
Protect indicator Senses amplifier protect status
Temperature meter Reports amplifier operating
temperature
Over-Temp. Alert Software adjustable threshold
AC power control
AC mode control Switches amplifier between
normal and standby mode
AC power indicator Indicates operate, standby, or
power-down mode
Control room foldback monitoring
Contact closure inputs and outputs
Output Sum of Monitor input and
signal from internal monitor
tap point
Frequency response 25 Hz–20 kHz ±0.5 dB
Distortion <0.05% THD @ +4 dBu out
Noise floor -90.5 dB
Nominal level +4 dBu
Maximum level +21 dBu
Output impedance 75 Ohms balanced
Output load 600 Ohms minimum
Configuration Active balanced
Level Adjusts amplitude of signal from
tap point
Monitor in to monitor out 0 dB, ±0.5 dB
Control range -95.5 to 0 dB in 0.5 dB steps
Inputs 1 discrete input (RLY/TRG IN)
Configuration Single-ended input
Resistance for closure detect <1kOhm max
Resistance for open detect
>5 kOhm min
Input Voltage Limit 7.000 VDC maximum
“-” input terminal connected to chassis
Output 1 discrete output (RLY OUT)
Configuration Electromechanical relay, dry
contacts, floating, C, NC, NO
Steady-state current (max.) 0.5 A
Switched current (max.) 0.25 A
Ground isolation 70 volts maximum
Connector “Phoenix-style” (a.k.a.“Euro-style”)
detachable terminal block connectors
Section 4:
Specifications