User's Manual

Table Of Contents

32 Using the CTU with a TB9100 TBA0STU/TBA0STP CTU Operation Manual

GND

This banana socket can be used as ground with RX GATE, TX KEY, RSSI,

and TX RELAY. It is connected to the CTU and system interface connector

ground.

TX RELAY This banana socket is used by the TB9100 as digital input 4. Ground this

input to set the input low. The LED alongside is not used by the TB9100.

TX KEY switch Set this switch to “ON” to key the transmitter. When the switch is in the

“OFF” position, applying a signal to the TX KEY banana socket will

control the state of the transmitter.

TX KEY socket Ground this input to key the transmitter. Alternatively, turn on the TX KEY

switch (

1().

RX GATE This LED is lit when the base station puts audio on the analog line. The

adjacent socket is connected to the Rx Gate output (E & M output) on the

analog RJ45 SYSTEM INTERFACE connector.

POWER Connect a 10 to 32VDC power supply to this input. This supply powers the

noise source, speaker, LEDs, and RS-232 communications.

Important Do not power the CTU from a PMU fitted with a 48V

auxiliary power supply board. The maximum supply volt-

age for the CTU is 32VDC. Use either a PMU 12VDC or

24VDC auxiliary output, or an external power supply.

SYSTEM CONTROL

BUS

Not used with TB9100.