Manual Controls; Manual Control From A Control Block; A Typical Equalizer Control Block - Crown AMB-5 User Manual

IQ–MSD Turbo 1.4 Advanced IQ System Software

7.3 Manual Controls

As mentioned earlier, a few equalizers can be controlled from a control block screen. However, most can only be
controlled from a graphics plate. We will describe both next with a generic example. Please consult your
equalizer's documentation for instructions specific to your particular model.

7.3.1 Manual Control from a Control Block

Use the Device menu ( ! ) to switch to the equalizer Control Block screen. The equalizer control block screen is
shown below:
A description of each control follows:
Fig. 7.3 A Typical Equalizer Control Block
Ch: Selects Channel A or B. Each channel has its own level settings, enabling the equalizer to be used in a stereo
system, or any system where two discrete channels of equalization are desired.
Lock: Locks Channel A and B together. Turning on the Lock control causes the changes made to one channel
to also be sent to the other channel.
DSPI: The DSPI or Data Signal Presence Indicator is an LED on the unit which flashes whenever it unit is polled.
The DSPI control is used to force the indicator to stay on as an aid to troubleshooting communication on the Crown
Bus. Once the DSPI control is turned on, the DSPI will remain on continuously even if the control block of another
device is selected. Turning off the DSPI control restores the indicator to its normal function of blinking when a valid
IQ command is received.
Sel: Selects the equalizer so that a GDM for it is added to a graphics plate when the graphics plate is set to the
Selected mode.
Level dB: Controls the cut or boost of a single frequency band. Only five Level controls are shown at a time and
their center frequency is displayed above them. In Figure 7.3, the Level controls centered at 31.5, 40, 50, 60 and
80 Hz are displayed. Use S + Z and S + Y to scroll sideways through all of the Level controls.
The level can be changed in ½ dB steps with S + Z and S + Y. This is the only way to change an equalizer
Level control—levels cannot be directly entered.
Low Pass: Sets the –3 dB corner frequency of a low-pass filter in kHz.
High Pass: Sets the –3 dB corner frequency of a high-pass filter in Hz.
In/Out: Switches the equalizer "in" or "out" of the audio path. Switching it to the "IN" position turns on the
equalization settings and switching it to "OUT" turns off the equalization settings much like a bypass switch on a
conventional equalizer.
Gain: Sets the gain of the equalizer. Because an equalizer is often used to attenuate unwanted peaks in
amplitude response, it is not uncommon for the net gain of the signal to be reduced. Use the Gain control to add
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