User guide

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CHAPTER 2
The SIM 3 Hardware
2.3.1.4. Status
In addition, the front panel of the mic switcher includes three status indicators:
■ 48 V — Indicates the presence of phantom power (red)
■ Bus Pwr – Indicates that power is being received from the SIM-3022 audio analyzer
(green)
■ Data – Indicates that status, commands and other non-audio data are being transferred
to or from SIM 3 software (green)
CAUTION: If the mic switcher’s 48 V LED is not lit, there is no phantom
power. This could indicate a problem with either the switcher or a connected
microphone.
CAUTION: If the bus power LED is dim or off, you may have too many
switchers connected. No more than three line and/or mic switchers should be
connected to a SIM-3022 analyzer at the same time.
2.3.2. Rear Panel
Connect to
3022 or 3081 only

The rear panel of the SIM-3081 microphone switcher includes two dedicated multi-pin bus
connectors, used to connect the switcher to the SIM-3022 analyzer and to daisy-chain other
SIM-3081 microphone switchers. The connectors carry several dedicated electrical connections
between the switchers and the analyzer, including audio and control signals and power.
CAUTION: Always use the bus connectors on the rear panel to connect
the SIM-3081 microphone switcher to a SIM-3022 analyzer or other SIM-
3081 microphone switchers only. Do not connect SIM-3088 line switchers to this
connector.