| CM16a SPECIFICATIONS |
| 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 |
| 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 |
| Input impedance |
25 kW 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 |
DataPort cable |
| 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 ohms balanced |
| Output load |
600 ohms min |
| POWER AMPLIFIER OUTPUT MONITORING |
| Output short detect* |
Senses load <1 ohm for Stereo/Parallel modes;
<2 ohms Bridge Mono mode (default threshold)
Threshold is adjustable in software |
| Output open detect* |
Senses load >60 ohms (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 |
DataPort 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 (above 50°C) |
| 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 |
| Nominal level |
+4 dBu |
| Maximum level |
+21 dBu |
| Input impedance |
10 kW 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 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 ohms balanced |
| Output load |
600 ohms min |
| Configuration |
Configuration |
| RS-232 PORT |
| Cable Type |
Null-Modem (a.k.a. LapLink), female 9-pin D-sub chassis connector |
| Port Settings |
|
| Data rate |
9600 bits per second |
| Data bits |
8 |
| Parity |
none |
| Stop bits |
1 |
| Flow control |
Xon/Xoff |
| CONTACT CLOSURE INPUTS AND OUTPUTS |
| Input |
1 discrete input |
| Configuration |
Single-ended input |
| Resistance for closure detect |
< 1 kW max |
| Resistance for open detect |
> 5 kW min |
| Input voltage limit |
7.000 VDC maximum ("-" input terminal connected to chassis) |
| Output |
1 discrete output |
| Configuration |
Electromechanical relay, dry contacts, floating, C, NC, NO |
| Maximum steady-state current |
0.5A |
| Maximum switched current |
0.25A |
| Ground isolation |
70V maximum |
| Connector |
“Phoenix-style” (a.k.a. “Euro-style”) detachable terminal block connector |
| NETWORK INTERFACE |
| Physical Network |
Ethernet |
| Raw data rate |
10 megabits per second |
| Frame format |
D.I.X. (Ethernet) |
| Connector |
RJ-45 female |
| Ethernet type |
10BASE-T: (via RJ-45) |
| Cable type |
10BASE-T: CAT-3 (or better) twisted pair |
| Max cable length |
10BASE-T: 100 m to hub |
| Grounding |
Floating |
| Transport Network |
TCP/IP |
| Inter-network protocol |
IP |
| Transport protocol |
UDP |
| Application Protocol: |
QSC24 |
| Version |
1 |
| Revision |
7 |
| GENERAL |
| Physical |
|
| Height |
1.72" (1RU) |
| Width |
19" (standard rack mount) |
| Depth |
14.84" (37.7 cm), including rear supports |
| Weight |
11 lbs. (5 kg) |
| Mounting |
Rear support recommended for portable or mobile use |
| Operating Temp. |
0 to 50° C |
| AC Power |
|
| Voltage |
100-240 VAC (Universal Supply) |
| Current |
1A RMS @ 120V, 1.1A RMS @ 100V, 0.5A RMS @ 230V |
| Frequency |
47–440 Hz |
