Specifications

Operating Manual - 24.24M Matrix Processor

5. REAR PANEL FEATURES

5.1 Input Connections

Balanced input signals are connected to the 24.24M using the included "Euro

Block" connector. A flat blade screwdriver is required to connect a stripped wire

lead to the loose connector, which is then inserted into the rear panel Euro Block

receptacle. It is important that both (+) and (-) inputs are properly terminated or

signal loss and noise may result. In other words, if an unbalanced input signal is

used, connect the signal to the (+) input, and connect the ground wire to both the

(-) and ground connection.

5.2 Output Connections

Like the inputs, output connections are made using the included "Euro Block" connector. All outputs are servo

balanced, and may be wired balanced or unbalanced. For unbalanced output connections, use (+) and ground and tie (-

) to ground.

5.3 Expansion Modules

The 24.24M base model is expandable by up to 16 additional inputs or outputs. Expansion modules of four inputs

or four outputs each can be installed. Input expansion modules use green Euroblock connectors, while output expansion

modules use black connectors. Removable metal plates cover unused expansion slots on the back panel.

5.4 Preset Recall

There are no user controls on the 24.24M, making it ideal for permanent installations where security is an issue.

There may be times, however, where real time variables require changes in system settings, such as EQ, gain, and delay

settings changing when a room size changes. For these types of changes, the 24.24M offers the ability to recall up to

eight different presets using contact closures. Contact closures are nothing more than external, user installed switches

that, when closed, recall a previously defined preset which at once applies changes to the settings of all inputs and

outputs. The switches can be anything from a rotary switch on a control room panel, to automatic door sensors scattered

throughout a conference center, to a microphone key switch, etc. Contact closures allow for flexibility while maintain-

ing a high degree of system security.

To use contact closure switching, up to eight presets (1-8) must first be defined according to the needs of the

installation. Switches are to be configured so that closing the switch contact triggers the preset recall event. It doesn't

matter if the switch is momentary or latching, the only thing that triggers the event is the transition from open to closed

for a given circuit. Closing a circuit will automatically override any previously recalled presets. Up to eight switches

Euroblock

Connector

System