Crown Audio IQ-USM 810 - Manual (Page 15)

Page 15
IQ-USM 810 IQ Digital Processor / Digital Mixer
IQ-USM 810 Reference Manual
4.1.6 Input Gate Status Display
A sixteen-segment LED display matrix is provided on
the front panel. The LEDs are separated into two rows
labeled “A” and “B.” The display can be set to
three different operating modes: Level Meter, Gate
Status, and Infinity Pattern (LED test mode). In the
Level Meter mode, each row can be set to display
the signal level of any input or output meter. In
Gate Status mode, each LED represents a corre-
sponding input gate, and remains lit while the gate
is open. In Infinity Pattern mode, the LEDs con-
stantly flash in an “figure-eight” pattern.
4.1.7 Audio Inputs
Three-terminal removable barrier block connectors are
provided on the rear panel for balanced audio input.
4.1.8 Input Selector
Each input has a three-position M/L/P selector switch
for mic level, line level, or mic level with phantom
power. Select the left position (M) for microphone sig-
nal levels up to +7 dBu (0 dBu = 0.775 volts). Select the
center position (L) for line level signals up to +32 dBu.
Select the right position (P) to provide +24VDC to mics
requiring phantom power.
4.1.9 Audio Input Gain Control
Each input channel has a screwdriver-set, calibrated
gain potentiometer for adjusting the input gain to the
input signal level. They can be used to compensate for
different microphone sensitivities (see Section 6.1.1 for
information on setting up the input gain controls). Con-
trol range is from –12 dB to +20 dB.
4.1.10 Main Audio Outputs
A 3-pin removable barrier block plug is provided on the
rear panel for each main output.
4.1.11 AUX Audio Outputs
A 3-pin removable barrier block plug is provided on the
rear panel for each AUX audio output. Any combination
of inputs can be routed to each AUX audio output.
4.1.12 IQ Bus Input/Output Connector
The upper rear panel RJ-45 connector provides
both input and output connection to the IQ Bus. This
connector is used for input in a conventional IQ Bus
wiring configuration, and can be used for both input
and output when a "hub" style IQ Bus wiring configu-
ration is implemented (see Section 6.6). Drop-out
relays maintain loop integrity in the event power is
removed from the IQ-USM 810.
4.1.13 IQ Bus Output Connector
The lower rear panel RJ-45 connector provides for
normal output wiring to the next device on the IQ
Bus loop.
4.1.14 RS232 Serial Port
A female DB9 serial port connector is provided on
the rear panel for direct communication with a PC
serial port. The IQ-USM 810 is capable of serving
as the system interface for other IQ components
(see Section 3.1).
4.1.15 Multi-Function Control Port
A male DB37 connector is provided on the rear
panel for external monitoring and control of objects
within the IQ-USM 810. There are sixteen digital
outputs, eight digital inputs and eight analog inputs
available as well as +5V and +10V for powering
external circuits. Section 6.2 gives pin assignments,
electrical specifications and application examples
for the Multi-Function Control Port.
4.1.16 AC Line Connector
A rear panel IEC320 connector is provided for attach-
ing the power cord. The IQ-USM 810 has a universal
power supply, and may be operated on AC line volt-
ages from 100VAC to 240VAC at 50Hz or 60Hz.
4.2 General Firmware Features
Note: The following features are accessed via IQ
for Windows software unless otherwise stated.
Refer to Figure 5.2, IQ-USM 810 Signal Flow
Block Diagram for feature locations in the audio
signal chain.
4.2.1 Input Level Meters
Audio level peak program meters are provided for
each input. The meters sense the audio signal immedi-
ately after analog to digital conversion, and respond
with 1.7 millisecond attack and 350 millisecond re-
lease. Meter range is from –60 to +20 dBu with
1 /
2
-dB
resolution. Calibration is in dBu when the input is in
“line” mode and set at 0 dB.
4.2.2 Input Dynamic Cut/Boost Meters
Meters are provided for each Input A/B Processing
Section to indicate the overall cut or boost being ap-
plied from all signal processing features that affect
input gain, including Auto-Leveler, Input Compressor,
and Auto-Mixing. Meter range is from –60 to +20 dBu
with
1 /
2
-dB resolution.