Crown Audio IQ-USM 810 - Manual (Page 31)

Page 31
IQ-USM 810 IQ Digital Processor / Digital Mixer
IQ-USM 810 Reference Manual
Unbalanced sources should be wired as shown in
Figure 6.4. The examples in Figure 6.4 are grouped
according to whether twin-lead shielded wire or single-
conductor coax (or twisted pair) wire is used.
+
2-wire line cord
(or battery power)
Output
INPUT
Floating
source
3-wire grounded line cord
(or other ground connection)
Shield not connected
at this end
INPUT
Grounded
source
Twin-lead shielded cable
Shield connected
to ground terminal
+ Output
+
2-wire line cord
(or battery power)
Output
INPUT
Floating
source
3-wire grounded line cord
(or other ground connection)
Input ground
terminal not used
INPUT
Grounded
source
Single-conductor coax
or twisted pair
Shield connected to both negative
(–) and ground input terminals
+ Output
+ –
+ –
+ –
+ –
Figure 6.4 Unbalanced Audio Input Wiring
6.1.2 Output
Three-terminal removable barrier block connectors are
provided for audio output (Figure 6.5). Both main and
AUX Audio Outputs are balanced and can drive 1200
ohms or more to +20 dBu.
The Main Audio Outputs are connected to the main
summing busses, and operate in a 8x2 arrangement.
Figure 6.5 Back Panel Output Connectors
They are provided for connection with other audio
equipment such as power amplifiers.
The AUX Audio outputs are connected to the AUX
summing busses and allow the IQ-USM 810 to operate
as a 8x10 matrix. Any input can be routed to any main
or AUX Audio Output via the summing buss.
Figure 6.6 Balanced Audio Output Connections
Balanced output wiring is shown in Figure 6.6. Notice
that if the load is connected to AC ground, the shield
should not be connected to the output ground terminal.
This will prevent unwanted ground loops.