Operation Manual
I-Tech HD DriveCore Series
Power Amplifiers
page 18
7.2 Operation Examples
Operation example 1
How to set the CH1 input sensitivity using the LCD Control
Screen:
1. After power-up, when the default display screen appears, press
Menu/exit
.
2. Press
Next
twice to reach the Advanced Menu, press the
encoder wheel to select.
3. Press
Next
once to reach the Analog Input Sensitivity menu,
then press the encoder wheel to select.
4. Tap on a channel and spin the encoder wheel to adjust the dB
gain for that channel, press
Menu/exit
to deselect.
5. When finished, press and hold the
Menu/exit
button to return
to the default display view.
Operation example 2
How to monitor the Thermal Errors using the LCD Control Screen:
1. After power-up, when the default display screen appears, press
Menu/exit.
2. Press
Next
four times to reach the Alerts Menu, press the
encoder wheel to select.
3. Press
Next
two times to reach the Thermal Errors menu, then
press the encoder wheel to select.
4. Tap on a channel to clear errors that channel, press
Menu/exit
to deselect.
5. When finished, press and hold the
Menu/exit
button to return
to the default display view.
Now let’s look at the function of each menu selection.
7 Advanced Operation
Front Panel Lockout
(in the Attenuation screen)
The amplifier’s administrator can control access to menu mode and the
amplifier’s attenuators. This lockout can be done either by the front
panel buttons or by System Architect software.
To lock or unlock the menu with the front-panel buttons: press
Next
and
Prev
simultaneously. To lock or unlock the menu with System
Architect software: go to the Tools Menu > Display Screen Security and
press the lockout button. If a specific parameter is protected, the
screen says “N/A” or “Change Disabled.”
If the lockout is done from the software, the user can disable the lockout
only in the software, not by pressing the front-panel but tons.
If the menu is locked and you press any button or turn an Encoder, the
word “LOCKOUT” is displayed. If a specific parameter is protected, the
screen says “N/A” or “Change Disabled.”
Mute/Unmute
(in the Attenuation screen)
• To mute a channel: The display will alternate between MUTE and the
attenua tion level. While the amplifier is muted, you can adjust
attenuation for each channel by tapping to select and turning the
Encoder knob.
• To unmute either channel: Press and hold for 1 second.
Opening Screen:
On power-up, the LCD Control Screen dis plays the
Crown logo. After a few seconds, the firmware version appears, then the
Attenuation screen appears.
Attenuation and Bar Meters
This screen dis plays the attenuation in dB. To change atten uation tap a
channel and turn the Encoder. Attenuation changes 0.5 dB per detent
when you turn the Encoder slowly, and more when you turn the Encoder
quickly. The current preset name is displayed in the upper-right corner.
The (M) is explained on the next page under Presets.
If the attenuators for both channels are linked (in the Attenuator Link
screen, described later), the word LINK appears. (If there is an error in
the error log, an exclamation point appears at bottom center.)
7.2.1 Basic Selections
