Clear-Com SB-704 - Manual (Page 15)

S B - 7 0 4 M A I N S T A T I O N 1 - 9
4. Adjust the sidetone adjust control for the desired amount of sidetone
in the headset.
• CHANNEL PROGRAM FEED LEVEL: Beside the null control for
each channel there is a control marked PGM which adjusts the amount of
program being sent to that channel.
Each channel has two program sources:
1. The main program that is input from the rear-panel XLR connector
may be enabled for a given channel with the program on/off DIP
switches for the channel.
2. The auxiliary input connector has four individual program inputs for
each channel. These inputs cannot be disabled with front-panel DIP
switches.
REAR PANEL OPTIONS
This section describes the switches on the rear panel. These switches and
controls are usually set and not used in daily operation of the unit.
Intercom Line Termination
The SB-704 has switch-selectable intercom-line termination networks. If
more than one SB-704 (or any other Master Station) is installed on the same
intercom lines then all of the terminations in all of the stations except one
must be disabled.
Note: If the link function is to be used on an SB-704 and there is more than
one main station in the system, it can only be used on the unit that
provides termination.
The terminations are enabled or disabled with switches on the rear panel.
Each channel is marked clearly on the panel. Set the switches to the off
position to disable the terminations in the station. The SB-704 is shipped
from the factory with all four lines terminated.
SHORT-CIRCUIT AND OVERLOAD CONDI-
TIONS
If a short-circuit condition appears on any of the four intercom lines, the sense
circuitry for that line will disconnect the DC power to that line only and the
red “short” light for that channel will be on. After approximately 0.5 seconds,
the SB-704 will attempt to turn power on again. This allows momentary short
or overload conditions to clear automatically.
If the red “short” light remains after repeated automatic or manual attempts to
restore power, then there is either a short on that intercom line or too many
intercom stations have been connected to that intercom line. In this case,
unplug the intercom line connected to the affected channel and its red “short”
light should go out. This indicates that there is short in that line. Follow that