Crown Audio I-T12000 HD, I-T5000 HD Advanced Operation, I-TechHD Series Power Amplifiers, page

4 Advanced Operation

4.8.13 Amplifier Settings

The Amplifier Output Enable button turns each channel on or off.

Error Reporting

The I-Tech amplifi er can detect four different error conditions per channel and errors in the AC line voltage. Each error type can be individually confi gured to report the error through the network. Network reported errors appear in the control software Event Log. The following describes each error source.

Clip: A clip detector is provided each channel. These monitors will indicate any clip condition (> 0.05% distortion) in the amplifi er channel. The clip detectors also can indicate Thermal Level Control limiting.

The I-Tech HD can be confi gured to report if an excessive number of output clip events occur in either amplifi er channel. The clip events are consider an error if they exceed the defi ned count per the defi ned unit of time.

The Count Control sets the maximum number of events before the error is reported. The range is 1 to 100. The Time Control defi nes the amount of time that the events are counted before starting the counting process over. Its range is 1 to 10 seconds. Note: Clip events are defi ned as the start of each clip and every 10 milliseconds the amplifi er is in clip thereafter. Using a high count setting with a short time setting may result in clip errors never being detected.

Thermal: Errors can be generated for excessive temperature in the output section of the amplifi er channel. The Threshold Control sets the level that, if exceeded, will generate the error report. This control has a range of 1 to 100%.

Line voltage: The AC line voltage can be monitored and an error generated whenever the voltage is outside of the limits set by the software.

Fan: Using the ON button, you can enable reports of any fan errors.

I-Tech HD Series Power Amplifiers

Continuous Load Monitoring

The load supervision feature allows real-time monitoring of the load connected to each amplifi er channel. When enabled, the I- Tech continuously monitors the amplifi er output voltage and current, and calculates the long-term average load impedance. The measured load impedance is compared against the user- defi ned high and low limits. If either limit is exceeded, the status indicator and, if enabled, the System Architect Error Reporting functions alert the user of the problem. There are six controls and two indicators for each channel:

On: Enables or disables the load-supervision function.

Load Status: This indicator shows the present status of the load impedance with respect to the user-defi ned high and low limits.

Average Impedance: Sets the expected average impedance for the connected load. This value determines the output signal level required for the test. This parameter is also used by the average power limiter to determine the expected power threshold.

High Limit: Sets the upper bound above which the system will report a “high” error status.

Low Limit: Sets the lower bound below which the system will report a “low” error status.

Average Impedance: Sets the expected average impedance for the connected load. This value determines the output signal level required for the test. This parameter is also used by the average power limiter to determine the expected power threshold. You set this fi eld to the nominal impedance of the connected load per channel.

Report Errors via Network: When this is turned on, high and low load errors are sent via the network to System Architect software.

page 34 Operation Manual