QSC Audio CM16a manual Introduction- Detailed Description of Functions

Section 1: Introduction- Detailed Description of Functions

AUDIO FUNCTIONS

Audio Inputs- These are the “Phoenix”-type 3 pin connec- tors used for balanced line level audio-signal input.

Input Sensitivity- Sets the sensitivity of the Audio Inputs to either 1 Volt or 3 Volts (r.m.s.). This selection should coincide with the level of the audio signal provided for each channel.

Input Source: Normal/Page- Selects the input source for each channel. Normal input is the audio connected at the Audio Input terminals. Page input is the audio provided by the Paging Input Module.

Level Control- Provides adjustment of the signal level delivered to the amplifier for each channel. Adjustment is from -95.5dB to 0dB in 1/2dB steps.

Meter-These points are indicators of where in the audio path the software can “meter” the audio.

Mute- Actively mutes the audio signal being passed by a channel. No signal is delivered to the amplifier when a channel is muted.

Parallel Mode- When parallel mode is selected, the input to the first channel is also applied to the second channel. When in parallel mode, the input is ALWAYS from the first (or odd numbered) input. The second (or even numbered) input is ignored; this includes the PAGE signal. This feature is useful for sending one input signal to both amplifier channels without having to wire jumpers between the two input connectors.

Polarity- Determines the polarity of the signal delivered to the amplifier for each channel.

AUDIO MONITOR CHAIN FUNCTIONS

Pre-Fader Monitor- Monitors the audio path at the point before the Level Control block (i.e. the input to the CM16a).

Post-Fader Monitor- Monitors the audio path at the point after the Level Control, Mute, and Polarity blocks (i.e. the output from the CM16a).

Amplifier Monitor- Monitors the audio at the output of the amplifier (i.e. the speaker terminals of the amplifier).

Off- This selection disconnects the monitor for the channel.

Level Adjust- Provides adjustment of the signal level deliv- ered to the Monitor Module from each of the selectable “tap” points of a channel’s audio path. Adjustment is from -95.5dB to 0dB in 1/2dB steps.

Monitor Module- This module functions as a four-input mixer with software selection of the input channels. The four selected channels are summed with the external input Moni- tor Chain In. For each of the inputs, the “tap” point is selectable from the pre-, post-, amplifier and off positions.

AMPLIFIER CONTROL FUNCTIONS

Standby/ Operate- Controls the amplifier’s power status-

ON- amplifier operational

STANDBY- amplifier in standby mode

NOTE! The amplifier must be powered in order to respond to any commands issued by the CM16a

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