Clockaudio CCRM 4000, Инструкция по установке и эксплуатации

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Connect the microphone audio output to DSP audio input. Phantom power must be supplied to the
microphone. For tri element CCRM 4000 use the link cable. DSP is used to mute the microphone.
5.3 DSP Mute Control
Each CCRM 4000 provides its mute status via Socket 3’s optically isolated open-collector output. The
Secondary units cascade their status into the Main’s Socket 4. This collective mute signal is
presented to the DSP which is then responsible for the actual muting.
The drawing below represents an equivalent circuit for the mute signal which shows how the open
collector output on each CCRM 4000 is connected in parallel when the units are connected together
using the correct RJ45 connection cable.
To function correctly, the common mute signal from all units must be connected via an external pull-
up resistor (not supplied) to an arbitrary voltage (V) at the DSP as illustrated above. The arbitrary
pull-up voltage (e.g. 5V DC or 12V DC) can either be supplied by the DSP itself (preferred option), or
by an external voltage source, although if an external voltage source is used, the 0V return must be
common with the DSP 0V.
When the microphones are not deployed, the voltage on the common mute signal will be pulled to
the common signal return (logic low at the DSP input). The DSP input will only switch to the logic
high state when all microphones are deployed and resting at the pre-set height.
Note that the common mute signal must be provided with an external voltage through a 10K Ohm
pull-up resistor, the mute signal will not function without this.
Mute Signal Equivalent Circuit