Manual

Operation Manual
CTs Multi-Channel Power Amplifiers
page 26 page 27
CTs Multi-Channel Power Amplifiers
Operation Manual
Problem: Green Preset indicator is flashing, or is not flashing.
Possible cause: This is not a problem. This indicator signals the
number of the current preset, if active, by flashing a series of flashes
equal to the current preset number. A preset is considered “active” if
the USP/CN settings match those in the selected preset. If a change is
made to any setting then the preset is considered “inactive,” and the
indicator stops flashing.
Problem: Both right indicators flash yellow in unison to report a fatal
error.
Possible cause: An unexpected condition within the CobraNet
inter face has been detected.
NOTE: Actual product artwork may vary slightly.
5 Troubleshooting (continued)
Problem: Data indicator is not flashing, even though a valid
com mand was sent.
Possible causes:
• Command was not addressed to the USP/CN.
• Network cable is disconnected or broken.
To assist with troubleshooting, System Architect can set an option for
force the data indicator on.
Problem: Green LINK/ACTIVITY indicator in network connector does
not illuminate or flash.
Possible cause: Ethernet link is broken, or network connection is 10
Mbps. Check Ethernet connections to the network switch.
Problem: Computer does not communicate with the network
devices.
Possible cause: Incorrect wiring. See Section 2.10 on network
wiring.
Performance CTs 4200USP/CN CTs 8200USP/CN
Frequency Response (at 1 watt, 20 Hz - 20 kHz) ± 0.5 dB ± 0.5 dB
Phase Response (at 1 watt, 10 Hz - 20 kHz) ± 35° ± 35°
Signal to Noise Ratio below rated power (20 Hz to 20 kHz) 100 dB unweighted 100 dB unweighted
Total Harmonic Distortion (THD) at 1 watt, from 20 Hz to 20 kHz < 0.05% < 0.05%
Intermodulation Distortion (IMD) 60 Hz and 7 kHz at 4:1,
from 163 milliwatts to full bandwidth power, typical
< 0.05% < 0.05%
Damping Factor: 10 Hz to 400 Hz >180 >180
Crosstalk (below rated power, 20 Hz to 1 kHz) > 80 dB > 80 dB
Common Mode Rejection (CMR) (20 Hz to 1 kHz) > 50 dB > 50 dB
DC Output Offset (Shorted input) < ± 5 mV < ± 5 mV
Input Impedance (nominal) (balanced, unbalanced) 20 kilohms, 10 kilohms 20 kilohms, 10 kilohms
Maximum Input Level (before input compression) + 20 dBu + 20 dBu
Load Impedance (Note: Safe with all types of loads)
Stereo
Bridge Mono
4/8 and 25 ohms (70V)
8/16 and 50 ohms (100V)
4/8 and 25 ohms (70V)
8/16 and 50 ohms(100V)
Voltage Gain (at maximum level setting), 1.4V sensitivity
4/8 Ohm Operation
70V Operation
100V Operation
20:1 (26 dB)
50:1 (34 dB)
71.4:1 (37 dB)
20:1 (26 dB)
50:1 (34 dB)
71.4:1 (37 dB)
Required AC Mains (model dependent) 120V, 60 Hz. 220/230/240V, 50 Hz 100V, 50/60 Hz. 120V, 60 Hz. 220/230/240V, 50 Hz
Power Draw at Idle (120VAC mains, all channels in 4/8 ohm mode) 70W 70W
Power Draw at Idle (120VAC mains, all channels in 70V mode) 114W 114W
Cooling Continuously variable speed forced air, front-to-back airflow Continuously variable speed forced air, front-to-back airflow
Dimensions: Width, Height, Depth 19 in. (48.3 cm) W x 3.5 in. (8.9 cm) H x 16.25 in. (41.3 cm) D 19 in. (48.3 cm) W x 5.25 in. (13.3 cm) H x 16.25 in. (41.3 cm) D
Net Weight, Shipping Weight 26 lb. 6 oz. (12 kg), 30 lb. 14 oz. (14 kg) 36 lb. 6 oz. (16.5 kg), 47 lb. (21.3 kg)
The following specifications apply to all models in Dual 8/4 ohm mode with 8-ohm loads unless otherwise specified.
6 Specifications
USP/CN (CobraNet Module)
Specifications
Memory Backup: 4 Megabit non-volatile FLASH memories for
backup of run-time parameters, presets, and program storage.
Capa ble of 10,000 write cycles.
Communications: 100 Mb Fast Ethernet conforming to IEEE 802.3.
Overall Audio Performance:
DSP Processing: Two processors, 32 bit, floating point, 724 µs
latency.
DAC Conversion: 24 bit, 250 µs latency.
Dynamic Range: 103 dB typical (A-weighted, 20Hz–20kHz, audio
sourced from muted CobraNet channel).
Distortion: < 0.1% THD+N, 20Hz–20kHz.
Frequency Response: ± 0.5 dB, 20Hz–20kHz.
Input/Output Monitor Accuracy: Typically ±1dB.
Maximum Input Level: + 20 dBu.
ADC Conversion: 24 bit, 250 µs latency.