Clear-Com AB-120 - Manual (Page 13)

Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
1 - 7
DESCRIPTION OF INTERNAL JUMPER OPTIONS AND
ADJUSTMENTS
The AB-120 has internal jumper options, connector selectable
microphone output levels, dip switch selection of ear phone output,
and headphone sidetone adjustment controls.
As shipped from the factory, the AB-120 has its internal jumpers and
dip switches set to implement the Clear-Com party-line as described in
its respective section.
The unit is setup for sportscaster mode, option and the mic output level
is set for -10 dBu. The unit will operate on power from the intercom
line or from the external DC supply.
All of these jumpers and settings may need to be set depending on the
application of the unit.
To gain access to the internal options, remove the bottom cover by
unscrewing the four rubber feet. There is a diagram showing the switch
settings and jumper options attached to the inside of the bottom cover.
Figure 1-4: AB-120 Internal Options Diagram