Clear-Com Tempest900 - Manual (Page 67)

61 Tempest®900 2-Channel Wireless Intercom System
Master Mode
Master Mode is a Tempest BaseStation function that allows multiple BaseStations to share audio without the presence of an
external hardwired intercom system power supply. Master Mode provides the necessary system termination to the 2-Wire
hybrid circuitry in each of the Tempest BaseStations, so that common audio transfer can take place. Each BaseStation in a
linked system provides its own power for audio. Either a single channel or both channels can be linked.
The only limit to the number of BaseStations that can be linked to share an audio channel is the impact of multiple RF
sources in close proximity. As the number of BaseStations goes up and they begin to compete for RF spectrum, the range
will begin to decrease. See the section on Accu-Sync and the section on Antenna Location, to minimize the effect of RF
competition.
It is necessary to use Master Mode when two or more Tempest BaseStations will be linked to share audio, and an external
hardwired intercom system is NOT present to provide power. When an external 2-Wire intercom system is connected to
Tempest, the external 2-Wire intercom system provides the required power and system termination and Master Mode is
automatically disabled.
On the BaseStation that will be set to Master Mode, set the 2-Wire Intercom Type Select slide switch to the Clear-Com
position. Master Mode only works in Clear-Com mode. If “RTS” or “BAL” is selected, an attempt to set the BaseStation as
master will result in an error message. If the slide switch is changed from Clear-Com to RTS or BAL, Master Mode will turn
OFF, and it will be necessary to return to the “Multi-Base Setting” menu to re-enable Master Mode.
On slave BaseStations, set the slide switch to Clear-Com.
On each BaseStation, set the shared intercom channel(s) to the 2-Wire mode. Master Mode only works for channels
selected for 2-Wire connection.
Connect the appropriate intercom channel(s) of each BaseStation that will share audio using the 3-pin XLR male and female
connectors on the back of the BaseStation.
Complete all settings and connections before activating Master Mode. Set one BaseStation to Master Mode. Master Mode
settings are found at the “Set Base as Master” screen under the “Multi-Base Settings” main menu selection. It is only
possible to set one BaseStation as Master. The words “Master Mode” appear in the top line of the BaseStation display,
to the right of the BaseStation name, when Master Mode is active. An attempt to set a second BaseStation as master, will
result in an error message. It does not matter which BaseStation in a linked series is set to Master Mode.
Slave BaseStations – those not set as master – detect the master BaseStation as a Clear-Com connection.
An attempt to set a BaseStation to Master Mode while connected to a 2-Wire system, will result in an error message. If a
BaseStation has “Set Base As Master” first turned ON, and an external hardwired intercom system is connected later, the
Tempest BaseStation will turn OFF Master Mode.
The “Set Base As Master” setting will remain ON through a power cycle.