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Input Signal

Frequency Response

20 Hz to 20 kHz, ±0.5 dB

10 Hz to 80 kHz, ±3 dB

Distortion

<0.01% THD+N @ +4 dBu out

(page input <0.03%)

Dynamic Range

>110 dB unweighted (20 Hz–20 kHz)

(page input >100 dB)

Polarity

In-phase or reversed

Level Control Range

-95.5 to 0 dB in 0.5 dB steps

Precision Attenuator Transients 

(“zipper noise”)

better than 112 dB below maximum output

Mute

>90 dB attenuation

Inputs

Program inputs 

16

Paging input 

1     Dedicated input with configurable 

routing to any or all 16 input sections

Monitor bus input 

1

Connector type 

“Phoenix-style” (a.k.a. “Euro-style”) 

detachable terminal blocks

Type Electronically 

balanced

Grounding 

All shield terminals connected 

to chassis

Nominal level 

1V/3V rms selectable (-10 dBV/+4 dBu)

Maximum level 

+21 dBu

Impedance 25 

k

balanced

Common-mode rejection 

Typical, >50 dB, 20 Hz-20 kHz 

Worst Case, >40 dB at 20 kHz

Crosstalk (inter-channel 

within DataPort pair) 

>75 dB separation (20 Hz–20 kHz)

Crosstalk (intra-channel 

between DataPorts) 

>90 dB separation, 20 Hz-20 kHz

measured with all inputs and 

outputs terminated

Outputs

Program outputs 

16 (via HD-15)

Connector type 

8 HD-15 DataPort connections

Cable type 

VGA monitor cable

1

Qualified length

2 meters

Monitor output

1

Connector

“Phoenix-style” (a.k.a. “Euro-style”) 

detachable terminal blocks

Type Electronically 

balanced

Grounding 

Shield terminal connected to chassis

Nominal level 

+4 dBu

Maximum level 

+21 dBu

Output impedance 

75

balanced

Output load 

600

min

Power Amplifier Output Monitoring

Output Short Detect

Senses load <1

for Stereo/Parallel modes; 

<2

Bridge Mono mode (default threshold)

Threshold is adjustable in software

Output Open Detect

Senses load >60

(default threshold)

Threshold is adjustable in software

Output Voltage Meter

Range automatically matches to 

amplifier model used

Output Current Meter 

Range automatically matches to  

amplifier model used

Amplifier Headroom 

Reports remaining available power  

Amplifier Gain

*

Calculates and reports amplifier gain

(knob setting)  

*Signal level must be higher than -32 dB, referenced to maximum output of amplifier

Power Amplifier Management

Power Amplifier Interface

Compatibility QSC 

DataPort-equipped 

amplifiers

Connector and cable 

HD-15 VGA cable

1

, 2 meters length

2

qualified (for longer runs, contact QSC’s

Technical Services Department)

Amplifiers

Up to 16 channels (8 DataPorts) of   

QSC DataPort-equipped amplifiers

Amplifier AC Power Control

AC mode control 

Switches amplifier between operate 

and standby mode 

AC power indicator

Indicates operate, standby, or 

power-down mode

Amplifier Status Monitor

Clip indicator 

Senses channel clip status

Protect indicator 

Senses amplifier protect status

Temperature meter 

Reports amplifier operating temperature 

Over-temp. alert

Software adjustable threshold (80°C default)

Control Room Foldback Monitoring

Number of Signal 

Monitoring Buses per CM16a

1

Number of Channels per CM16a

4    (Maximum number assigned

to monitor mix at one time)

Internal Signal Monitor Points 

(each with individual level controls)

Pre-fader input signal 

16

Post-fader input signal 

16

Power amplifier output 

16

Monitor Input 

Summed with internal monitor mix 

at unity gain

Monitor in to monitor out 

0 dB,  ±1 dB

Nominal level 

+4 dBu

Maximum level 

+21 dBu

Input impedance 

10k

balanced

Configuration 

Active balanced, shield connected to chassis

Common-mode rejection 

Worst case, >54 dB at 20 Hz rolling off to 

>40 dB at 20 kHz

Typical case, >50 dB 20 Hz-20 kHz

Output

Sum of external monitor input and signals

from internal monitor mix

Frequency response

20 Hz–20 kHz, ± 0.5 dB

Distortion

<.05% THD @ +4 dBu out

Dynamic range

>90.5 dB unweighted, 22 Hz–22 kHz

Noise floor

-90.5 dB

Nominal level

+4 dBu

Maximum level

+21 dBu

Output impedance

75

balanced

Output load

600

min

Configuration

Active balanced

RS-232 Port

Cable Type

Null-Modem (a.k.a. Laplink), female 9-pin 

D-sub chassis connector

Port Settings

Bits per Second

9600

Data Bits

8

Parity

none

Stop Bits

1

Flow Control

Xon/Xoff

Page Input

Specifications

Содержание Network Audio Systems

Страница 1: ...rate the networked audio system including the CM16a units and their amplifiers Each CM16a performs monitoring and control functions for QSC DataPort equipped amplifiers using DataPort cables Further the CM16a connects to QSC s family of digital signal processors such as the DSP 3 Control Application Software There are two ways to run QSControl applications on the System Controller The first is wit...

Страница 2: ...ilable for system diagnostics accessible via Telenet only Page input with selectable 1V or 3V sensitivity One contact closure input One floating dry contact SPDT Single Pole Double Throw relay output Audio monitor bus with selectable tap points mixing and balanced I O Recessed front panel bypass switch Firmware is updateable via the network to add future upgrades QSControl Amplifier Network Monito...

Страница 3: ...s remaining available power Amplifier Gain Calculates and reports amplifier gain knob setting Signal level must be higher than 32 dB referenced to maximum output of amplifier Power Amplifier Management Power Amplifier Interface Compatibility QSC DataPort equipped amplifiers Connector and cable HD 15 VGA cable 1 2 meters length 2 qualified for longer runs contact QSC s Technical Services Department...

Страница 4: ... amplifiers the CM16a shall provide AC standby operate mode control AC power state indication temperature metering amp gain settings front panel knob position with respect to full output over temperature detection stereo parallel bridge mono indication amplifier model detection and protect status detection subject to the capabilities of each amplifier Audio Monitoring Chain For each of the sixteen...

Страница 5: ...ut Output Monitor Chain Monitor Chain Port A Ch 2 Ch 1 Ch 1 Functions Ch 2 Functions Amp Functions RLY Out RLY Trig in Serial I O DB 9 Internal Micro Controller Ch 2 DataPorts B through H same as DataPort A Audio Monitor Chain Summing Bus Internal DAC for Test Tones and Playback NC NO C Contact Closure I O RLY From Tap Points Mon Power Amplifier DataPort Interface Up to four signals may be sent to...

Страница 6: ...djustable thresholds for detecting loudspeaker opens and shorts Amplifier configuration including gain control settings and stereo parallel or bridge mode Monitor amplifier s power status and AC standby mode System Manager also provides an Event Log that allows you to keep track of system events such as amplifier clipping protect modes loudspeaker opens and shorts and other conditions These text f...

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