HME Clear-Com Encore AB-120, User Manual

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AB-120 Announcer Console
3 Installation
The AB-120 is a versatile interconnection box and can accommodate many types of
installation. The AB-120 has two modes of operation; sportscaster mode and announcer mode.
When shipped from the factory the AB-120 has its internal jumpers and dip switches set to
implement the Clear-Com party-line setup. The unit will be configured for Sportscaster
Console operation and the microphone output level is set for -10 dBu with a dynamic
microphone input.
The AB-120 can operate on power from the intercom line or from a suitable external DC
power supply.
3.1 Sportscaster Mode -Momentary Microphone Mute
Place a jump jack on pins 1 and 2 of JP11. Both front panel buttons are momentary in
operation and microphone output is active except when either of the buttons is pressed. The
red LED next to the mute button is lit when the microphone output is active.
Pressing the mute button turns the output of the microphone circuit off as long as the button is
pressed.
Pressing talkback turns the output of the microphone circuit off and sends the signal to the
intercom line. The green LED next to this button is lit when the talkback circuit is activated.
3.2 Announcer Mode - Latching Microphone
Place a jump jack on pins 2 and 3 of JP11. In this mode, the microphone on/off button is
latching in action, and talkback is momentary. The red LED next to the on/off button is lit
whenever the microphone output is active.
Pressing the on/off button toggles the state of the mic from on to off, or vice versa, each time
the button is pressed.
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