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The audio board is also equipped with four LEDs to indicate the operational status. Four
LEDs belong to every radio circuit. Two of this four LEDs are two-color LEDs and display
the status of the radio transmission. After switching on the system these LEDs display
GREEN. This indicates that the circuits are locked to the system and ready to
transmit/receive data. As soon as a microphone station is activated and a channel of the
radio circuit is occupied, the LED will change to RED. The other two LEDs of each group
of four indicate the real audio level transmitted from the microphone station.
4. Antenna Splitter Board
There are two versions of the antenna splitter board: “2x 1in4” and “1x 1in6”. For the
use of one audio board in the system (four audio channels) the antenna splitter “2x 1in4”
is used. Using two audio boards it is necessary to use two antenna splitter boards “1x
1in6”.
Each antenna splitter board is equipped with N-connectors for the connection of the
antenna cables. The transmitting and the receiving antenna are identical and have no
differences in the handling. The individual splitter outputs of the antenna splitter are
connected by SMA patch cables to the appropriate boards. Each audio board has two
antenna inputs and two antenna outputs. The controller board has one antenna input and
two antenna outputs. The remaining unconnected SMA connector must be terminated
with a 50-Ohm-termination connector.
(See figure: Module Wiring)
