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IQ Mixer/Multiplexer Hardware Installation
Rev. 0
(Rear View)
(Front View)
2 Facilities
AUX Connector
A 3-pin male mini-XLR connector is used for remote
control of equipment lacking the Crown Bus. A 10
VDC power source is provided to control solid state
relays and other logic circuits. The auxiliary con-
nector also includes a high-impedance 10 VDC in-
put. (Section 3.4)
Stack Audio Inputs
These two stack inputs allow you to multiply the
number of audio inputs by stacking 2, 3, or more
units to build a 12x2, 18x2, or larger mixer. (Section
3.3.3)
DSPI
This yellow LED is a Data Signal Presence Indicator.
It flashes whenever a valid IQ command has been
received. The indicator can also be forced on to aid
rapid troubleshooting of the Crown Bus wiring.
Enable Indicator
This amber enable indicator shows that the unit is
receiving AC power.
Audio Input Gain Control
Each of the six input channels 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 sensi-
tivities. (Section 3.3.1)
RS232/RS422 Connector
This DB25 connector functions as a standard RS232
or RS422 serial communications port. It can be used
for connection directly to a host computer (Section
3.1) or, if Option 4 was purchased, for connection to
a Crown Local Net loop (Section 4.2).
Crown Bus Ground Connector
This chassis ground stud is provided to connect an
Figure 2.1 Front and Rear Panels
LMP
+–+–+–+–+–
AUDIO
IN
6
+– +– +– +– +–
MAIN
OUT IN
AUX
CTRL
RS232 / RS422
AUDIO
IN
5
AUDIO
IN
4
AUDIO
IN
3
AUDIO
IN
2
AUDIO
IN
1
120 VAC
60 Hz
20 W
AUDIO
OUT
2
AUDIO
OUT
1
BUS
STACK
IN
MAIN BUS
STACK
IN
0
-5
-10
-12
5
10
15
21
ADD 25
FOR MIC
LMP
0
-5
-10
-12
5
10
15
21
ADD 25
FOR MIC
LMP
0
-5
-10
-12
5
10
15
21
ADD 25
FOR MIC
LMP
0
-5
-10
-12
5
10
15
21
ADD 25
FOR MIC
LMP
0
-5
-10
-12
5
10
15
21
ADD 25
FOR MIC
LMP
0
-5
-10
-12
5
10
15
21
ADD 25
FOR MIC
+
–
+
–
CROWN BUS
SERIAL DATA LOOP
INPUT
GROUND
ONLY
IN