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CHAPTER 2: THE MPS-488 POWER SUPPLY
Channel Inputs
Up to eight channels of balanced audio are received via the
MPS-488's eight Channel Inputs. The inputs are equipped
with XLR female connectors (pin 1, ground; pin 2, signal
positive; pin 3, signal negative) and have an input imped-
ance of 10 kOhms. Make sure to use standard balanced
XLR cables with all three pins connected on both ends.
MPS-488 Channel Inputs
Channel Inputs default to being routed to their correspond-
ing Channel Outputs but can also be routed to adjacent out-
puts with the Link switches, though this affects their input
impedance (see "Input Impedance for Linked Channel
Inputs" on page 11).
Link Switches
Link switches determine how Channel Inputs are routed to
Channel Outputs. When a Channel Input's Link switch is dis-
abled (set to the down position), the input is only routed to
its corresponding Channel Output (for example, Channel
Input 1 routed to Channel Output 1). When a Link switch is
enabled (set to the up position), the input is routed to its cor-
responding Channel Output and the next adjacent Channel
Output. If multiple, adjacent Link switches are enabled, the
input is routed to each adjacent Channel Output.
MPS-488 Audio Input
NOTE:
Channel Inputs are inactive when the
Link switch for their preceding Channel Input is
enabled. Connections should not be made to inactive
Channel Inputs.
10
How Linked Input Channels Are Routed
The following examples illustrate how the Link switches for
Input Channels 1–4 can be used to affect their routing to
Channel Outputs.
■
When Link switches 1–3 are off, Channel Inputs 1–4 are
routed to their corresponding Channel Outputs.
1
2
3
4
■
When Link switch 1 is on and Link switches 2–3 are off,
Channel Input 1 is routed to Channel Outputs 1–2, and
Channel Inputs 3–4 are routed to their corresponding
Channel Outputs. Channel Input 2 is inactive.
X
X
1
2
3
4
When Link switches 1–2 are on and Link switch 3 is off,
■
Channel Input 1 is routed to Channel Outputs 1–3, and
Channel Input 4 is routed to Channel Output 4. Channel
Inputs 2 and 3 are inactive.
X
X
X
X
1
2
3
4
When Link switches 1–3 are on, Channel Input 1 is
■
routed to Channel Outputs 1–4. Channel Inputs 2–4 are
inactive.
X
X
X
X
X
X
1
2
3
4
1
2
3
4
1
1
3
4
1
1
1
4
1
1
1
1
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