User guide

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CHAPTER 2
The SIM 3 Hardware
2.3.3. SIM-3081 Microphone Switcher Audio Connections
The SIM-3081 microphone switcher provides 8 mic-level inputs for measurement mics
placed at various locations within the room. They are on XLR-3F connectors on the front
panel, each with 48-V phantom power.
2.4. SIM-3004 REMOTE POWER SUPPLY
The SIM-3004 remote power supply is used to expand the number of SIM-3088 line-level
switchers and SIM-3081 microphone switchers that may be supported within the SIM 3
measurement system. Though SIM 3 line and mic switchers are powered by the SIM-3022
analyzer, the remote power supply is required when a system is expanded beyond three
connected switchers. Each supply will support up to two additional SIM-3088 line switchers
or one additional SIM-3081 mic switcher.
The half-rack power supply’s chassis is the same width and height as the mic switcher, so
will fit next to it on the 1-RU rack tray. Three threaded holes on the bottom panel are used to
attach it to the tray with 6-32 x 0.31” screws.