Crown I-Tech I-T4000, Operation Manual

Page: 19 / 52

I-Tech Series Power Amplifiers
Operation Manual page 19
Pink Noise Generator: The default setting is OFF. Press an
Encoder knob to turn on the generator. Its level will read –100 dB.
Adjust the noise level from –100 dB to +20 dB in 0.5 dB steps by
turning Encoder 1 or 2. The level can be adjusted only when this
menu option is visible. To turn off the generator, press an Encoder
knob or go to another menu item.
OFF OFF
Pink Noise Generator Pink Noise Generator
-17 -17
dB dB
.
5
Input Source: For each channel, press the Encoder to select ana-
log, digital, or automatic backup source. Options are:
Digital (DIG)
Analog (ANLG)
Digital with analog backup (A <– D)
Digital with analog override (D <– A)
Digital with analog backup: The I-Tech 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 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 switches instantly to the analog signal. If the analog signal
fails, the I-Tech switches to the digital signal after a delay set by the
Hold Time slider in the Input Section of the IQwic Signal Path Page.
Maximum Analog Input: Press an Encoder to 21 dBu or
+15 dBu. When set to +21 dBu, the maximum input level to the
amplifier is +21 dBu. When set to +15 dBu, the maximum input
level to the amplifier is +15 dBu. Note: Changing this value changes
the range of sensitivities available to the amplifier.
For more information see the I-Tech Sensitivity Charts in the
Appendix of the I-Tech Application Guide. It is available online at
www.crownaudio.com/itech/pdf/137327.pdf.
DIG DIG
Input Source Input Source
A D A D
21dBu 21dBu
Maximum Analog Input Maximum Analog Input
AES/EBU Input Trim: Sets the gain of the AES/EBU digital input
signal. Turn an Encoder to change the gain.
12.0 12.0
AES/EBU Input Trim AES/EBU Input Trim
13.5 13.5
dB dB
4.2.4 MONITOR MENU
This menu lets you monitor the status of the amplifier. Starting from
the Attenuation Screen, press
Menu, then press Prev . Or, starting
from the Advanced Menu screen, press Next to go to the Monitor
Menu screen. Then press an Encoder knob to enter the menu.
Load Monitoring: Press an Encoder knob (or use IQwic) to turn
speaker load monitoring off or on. When on, the load connected to
the amplifier output is displayed. The text below the reported load
indicates whether the value is within the limits set in IQwic. LOW
means the load is below limits; HIGH means the load is above lim-
its. NORMAL means the load is within limits.
Thermal %: This indicates the amplifier temperature in percent,
where 100% is the maximum allowable temperature. If Thermal %
reaches 100%, the amplifier is out of thermal headroom and has
shut down (or will very soon).
Thermal % Thermal %
0 0
AC Voltage: This shows the AC line voltage at the AC cord inlet to
the amplifier.
Exit: To exit the Advanced Menu and go to the Attenuation screen,
press Menu/Exit once.
Peak Voltage Limiter: Limits the peak output voltage to a level
that you set, either OFF or 0 to 255 volts. Press the Encoder to turn
on the Limiter. Once it’s on, turn the Encoder to set the voltage.
Additional controls, such as attack and release, are available
through IQwic.
Average Power Limiter: Limits the output power to an amount
that you set, from 10 watts to the maximum output power of the
amplifier. Press the Encoder to turn on the Limiter. Once it’s on, turn
the Encoder to set the power. Additional controls, such as nominal
impedance, attack, and release, are available through IQwic.
OFF OFF
Avg Power Limiter Avg Power Limiter
1050 1050
w
OFF OFF
Peak Voltage Limiter Peak Voltage Limiter
224 224
v
4 Advanced Operation
OFF OFF
Load Monitoring Load Monitoring
8
Normal Normal