AB-120 Announcer Console
JP7 (CC/RTS -TW Level Selection)
JP7 allows the send gain on the partyline intercom channel to be increased when driving a TW
type intercom line, such as RTS. Placing the jumper between pins 2 and 3 increases the send
gain approximately 4 dB.
JP7 is shipped from the factory with its jumper between pins 1 and 2, providing Clear-Com
standard levels to the intercom line.
JP8 (Microphone Output Level)
JP8 provides the selection of desired output level for the microphone output.
JP9 and JP10 (Microphone Gain)
These JPs provide selection of the desired gain for the microphone input.
JP11 (Mute Switch Latching/Momentary)
JP11 selects the sportscaster or announcer modes of operation for the front panel push button
switches. Connection between pins 1 and 2 enables the sportscaster momentary mode and
connection between 2 and 3 enables announcer latching mode.
J2 and J3 (Microphone Output Pad)
The microphone output connector on the rear panel can be internally plugged into two
different headers on the main PCB. Connecting the output to J2 provides a line level output.
Connecting the output to J3 adds a 30 dB pad in the series to provide a microphone level
output.
S2 and S3 (Dip Switch Selection of Split Ear Headset Output)
Each headset amplifier has an eight position dip switch providing a selection of inputs to each
side of the headset. S2 is for the left ear and S3 is for the right. Any or all of the inputs can be
selected at the same time.
The following illustrates the function of each dip switch.
Page 16
