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LPC4 Loop Priority Control Option
The LPC4 is used to interface the school sound system with satellite systems, such as those found in gymnasiums,
multi-purpose rooms, etc. The option also provides emergency seizure of the satellite system and bridging of their
outputs into the main system. Refer to figure 1.
MCP-EXP Input Expander Option
The MCP-EXP Expander Panel may be used to increase the input capabilities of the sound system. Each panel has
two banks of four switches and adds up to eight additional inputs to the MCP35A. Each bank may be connected to
the microphone input (MIC1 or MIC2) or AUX input of the MCP35A. Banks may be interconnected, allowing all
eight inputs to feed into one MCP35A MIC or AUX input. A multiple expander panel is easily interconnected to fur-
ther increase the input capacity of the system.
An input is provided on each bank to replace the MCP35A MIC or AUX input into which the expander is connect-
ed. This input is accessed when all switches in the bank are in the out (off) position. When a switch is placed in the
on position, the input from each high-number switch on the bank is overridden, i.e., the input on switch 3 overrides
the input on switch 4, the input on switch 2 overrides the input on switches 3 and 4, and the input on switch 1
overrides the inputs on switches 2, 3, and 4.
Vertical 0.156 centerlines headers are provided to connect balanced or unbalanced microphones and auxiliary
equipment (tuners, CD players, tone generators, etc.). The panel is designed for easy rack mounting and occupies
one rack space.
Figure 1 - Wiring Diagram, LPC4 Loop Priority Circuit