Crown I-Tech 4x3500HD DriveCore Series Operation Manual page 11

7 Advanced Operation
Attenuator Limits: You can set the maximum attenuation from 0 dB to Input Sources: For each channel, turn the Encoder to select ana log, digital,
–100 dB. This feature allows you to set a limit on the attenua tors. Once set, or CobraNet Options are:
attenuation cannot be adjusted beyond this level. Analog
Digital
NOTE: The attenuator setting must be below the attenuator limit that you are Digital with analog backup
trying to set. For example, if the attenuator is set at –3 dB, you cannot set the Digital with analog override
attenuator limit below –3 dB unless you decrease the attenuator level.
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 sig nal, 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.
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.
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I-Tech HD DriveCore Series Power Amplifiers I-Tech HD DriveCore Series Power Amplifiers
7 Advanced Operation
Maximum Analog Input: Use Next and press the encoder wheel to select:
AES Input Status: "Lock" indicates that an AES cable is plugged in and the
+21 dBu or +15 dBu. Note: Changing this value changes the range of amplifier is receiving (and locking to) the AES phase logs logs. "No Lock"
sensitivities available to the amplifier. means that the amplifier is not receiving, or is not locking to the AES
clock pulse.
For more information see Figure 7.3 and the I-Tech Sensitivity Charts in the
Appendix of the I-Tech Application Guide. It is available online at www.
crownaudio.com/pdf/amps/137327.pdf.
CobraNet Input Trim: Turn the Encoder knob to vary the gain of the
CobraNet digital signal for Channel 1: -100.0 dB to +20 dB. See Figure 4.4 for
more information.
AES Input Trim: Turn the Encoder knob to vary the gain of the AES digital
signal for Channel 1: -100.0 dB to +20 dB. See Figure 4.4 for more
information.
Operation Manual Operation Manual
Bandpass Gain: In each channel of the I-Tech HD's DSP, just before the Input Delay: Sets the input signal delay in each channel. Turn the Encoder
output limiter and after the preceding filter, is a gain block (not shown on the knob to vary the delay. The delay step size is speed sensitive. Pressing the
Signal Path block diagram). Bandpass Gain adjusts the gain of this block encoder enables or disables the Delay.
between -24 dB and +24 dB.
Below each channel's delay setting is the equivalent distance in feet and meters.
Adjusting the bandpass gain in the LCD screen makes it easy to vary the level of For example, 10 ms is the signal delay of sound traveling 11.3 feet or 3.4 m.
subwoofers, midrange drivers and high-frequency driv ers.
Output Delay: Sets the output signal delay in each channel. Turn the Encoder
knob to vary the delay. The delay step size is speed sensitive. Pressing the
Output Polarity: Use Next and press the encoder wheel to select each
channel icon to toggle the output signal polarity between + and –. encoder enables or disables the Delay.
Below each channel's delay setting is the equivalent distance in feet and meters.
For example, 10 ms is the signal delay of sound traveling 11.3 feet or 3.4 m.
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