Crown Audio I-T12000 HD Advanced Operation, AES Cobra net, 0.0 dB, No Lock, Cnet, page, +15dBu

I-Tech HD Series Power Amplifiers

4 Advanced Operation

Attenuator Limits: You can set the maximum attenuation from 0 dB to –100 dB. This feature allows you to set a limit on the attenuators. Once set, attenuation cannot be adjusted beyond this level. The attenuator limit appears as a line in the attenuator bar meter.

NOTE: The attenuator setting must be below the attenuator limit that you are trying to set. For example, if the attenuator is set at –3 dB, you cannot set the attenuator limit below –3 dB unless you decrease the attenuator level.

Attenuator Limits

0.0dB 0.0

Attenuator Link You can set the attenudators to be independent or linked. Turn an Encoder knob to choose one of those options, then press the knob to save your choice.

Attenuator Link

INDEPENDENT

Turn to Set-Press to Save

Input Sources: For each channel, turn the Encoder to select analog, digital, or automatic backup source. Options are:

Analog

Digital

Digital with analog backup <Digital A-Backup> Digital with analog override <Digital A-Ovride>

Digital with analog backup: The I-Tech HD is being fed a digital signal and an analog signal. The input is currently switched to the digital signal. If it fails, the I-Tech HD switches instantly to the analog signal.

Digital with analog override: The input is switched to the digital signal, and no analog signal is applied. If an analog signal is sent, the I-Tech HD switches instantly to the analog signal. If the analog signal fails, the I-Tech HD switches to the digital signal after a delay set by the Hold Time slider in the Input Section of the System Architect page.

Input Sources

<Analog> <Digital>

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Analog Source Select: Turn the left Encoder knob to select Analog 1, Analog 2, or Analog 1+2 signals for Channel 1. The right Encoder does the same for Channel 2. Press the knob to confi rm your selection.

Analog 1 is Analog input Channel 1. Anolog 2 is Analog input Channel 2.

Analog 1 +2 is Analog input Channels 1 and 2.

Analog Source Select

Analog Analog

1 2

Maximum Analog Input: Turn an Encoder to select the maximum input level

to the amplifi er: +21 dBu or +15 dBu. Press the knob to confi rm your selection.

Note: Changing this value changes the range of sensitivities available to the amplifi er.

For more information see Figure 4.4 and the I-Tech Sensitivity Charts in the Appendix of the I-Tech Application Guide. It is available online at www. crownaudio.com/itech/pdf/137327.pdf.

Maximum Analog Input

+15dBu

Turn to Set-Press to Save

Digital Source Select: Turn the left Encoder knob to select the digital source

for Channel 1: AES or Cobranet. The right Encoder does the same for Channel 2. Press the knob to confi rm your choice.

Digital Source Select

AES <Cobra net>

AES Source Select: Turn the left Encoder knob to select the digital source for

Channel 1: AES1, AES2, or AES1+2. The right Encoder does the same for Channel 2. Press the knob to confi rm your choice.

AES 1 is AES input Channel 1. AES 2 is AES input Channel 2.

AES 1 +2 is AES input Channels 1 and 2.

AES Source Select

AES	AES
1	2

AES Input Trim: Turn the left Encoder knob to vary the gain of the AES digital

signal for Channel 1: -100.0 dB to +20 dB. The right Encoder does the same for Channel 2. See Figure 4.4 for more information.

AES Input Trim

0.0 dB 0.0

AES Input Status: “Lock” indicates that an AES cable is plugged in and the amplifi er is receiving (and locking to) the AES clock pulse. “No Lock” means that the amplifi er is not receiving, or is not locking to the AES clock pulse.

AES Input Status

No Lock

CobraNet Source Select: Turn the left Encoder knob to select the CobraNet

source for Channel 1: Cnet1, Cnet2, or Cnet 1+2. The right Encoder does the same for Channel 2. Press the knob to confi rm your choice.

Cnet1 is Bundle A. Cnet2 is Bundle B.

Cnet 1+2 is Bundles A+B.

Cobranet Source Select

Cnet 1 Cnet 2

CobraNet Input Trim: Turn the left Encoder knob to vary the gain of the

CobraNet digital signal for Channel 1: -100.0 dB to +20 dB. The right Encoder does the same for Channel 2. See Figure 4.4 for more information.

Cobranet Input Trim

0.0dB 0.0

Operation Manual