Navigating The Lcd Control Screen; Basic Menu - Crown I-T4000 Operation Manual

I-Tech Series Power Amplifiers
4 Advanced Operation

4.2 Navigating the LCD Control Screen

4.2.1 Introduction
The LCD Control Screen and its controls let you configure the
amplifier and access many IQ features that before were available
only through a remote computer. Also, you can recall DSP presets
for certain loudspeaker models. (Some DSP parameters cannot be
adjusted with the LCD Control Screen. That is done in IQwic with
assistance from the Help files.)
Figure 4.1 shows the parts of the LCD Control Screen. Its functions
are described below. NOTE: These functions can also be controlled
in IQwic with assistance from the Help files.
Figure 4.1 Parts of the LCD Control Screen
Attenuation (output level)
On power-up, the LCD Control Screen displays the attenuation in
dB and on a bar meter. To change the attenuation in either channel,
turn the Encoder. Attenuation changes 0.5 dB per detent when you
turn the Encoder slowly, and more when you turn the Encoder
quickly.
Operation Manual
Mute/Unmute
• To mute either channel: Press and hold an Encoder knob for
2 seconds. The display will alternate between MUTE and the attenu-
ation level. While the amplifier is muted, you can adjust attentuation
for each channel by turning an Encoder knob.
• To unmute either channel: Press and hold an Encoder knob again
for 2 seconds.
Front Panel Lockout
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 IQ software.
To lock or unlock the menu with the front-panel buttons, press Next
and Prev simultaneously. Those buttons toggle the LOCK/
UNLOCK status. To lock or unlock the menu with IQ software, see
the IQ software help files.
If the lockout is done from the IQ software, the user can disable the
lockout only in the IQ 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 "LOCKED" is displayed.

4.2.2 Basic Menu

Getting around in the Menu is intuitive. Here are the basic operations:
• Press Menu/Exit to enter the main menu.
• Press Next to go to the next item in the menu.
• Press Prev to go to the previous item in the menu.
• Turn either Encoder knob to change the value of the displayed param-
eter.
• Press Menu/Exit to leave the menu.
Some menu items require confirmation: after you request a change, the
display might say "Press Knob." To confirm a change, press an Encoder
knob. If you don't want the change to occur during a confirmation, press
Next, Prev, or Menu/Exit.
Basic Menu Items
Contrast: Press Menu/Exit to enter the Basic Menu. The first item on
the menu you see is the Contrast screen. Turn an Encoder knob to change
the contrast of the LCD screen. You can return to the Attenuation screen by
pressing Menu/Exit, or go to other menu items by pressing Next or
Prev.
CH1 Sensitivity: Sets the input sensitivity of Channel 1. Turn an
Encoder knob to change the input sensitivity.
Note: If you do not see the sensitivity you need, try changing the Maxi-
mum Analog Input level in the Advanced Features Menu (described
later). This makes different sensitivities available.
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