TOA L-01F, L-01S T Users Manual

AUDIO PRODUCTS FOR SYSTEMS CONTRACTORS

M UT IN G M O D U L E S

The two types of muting modules, MUTE-RECEIVE and MUTE-SEND, have mute function circuitry that connects to two common “MUTE” buses, and one common “GROUND”
bus when installed in an A-900MK2 mixer/amplifier or M-900MK2 mixer/pre-amplifier. A “BUS” is simply an internal wire that connects from module-slot to module-slot.
You can access these buses via rear-panel screw terminals, labeled, “MUTE 1”, “MUTE 2” and “GND”. Mute-type modules connect to both mute buses “out-of-the-box”.
You can disconnect the module’s mute function circuitry from each mute bus by cutting jumper wires on the modules. This allows you to configure systems with multiple
levels of priority.

MUTE-RECEIVE modules respond to mute bus activation in either of two ways: 1) Switch Activation: Connecting a switch closure between the “MUTE” (1 or 2)” and “GND”
screw terminals on the rear of the mixer/amplifier activates the mute function circuitry of MUTE-RECEIVE modules connected to the same bus. This is also referred to as
“manual muting”. 2) Auto-Mute: When input signal level to a MUTE-SEND module exceeds a user-adjustable threshold, the module’s mute function circuitry activates the
mute function circuitry of all MUTE-RECEIVE modules connected to the same bus. This is also referred to as “signal-activated muting”.