User's Manual

Table Of Contents

TBA0STU/TBA0STP CTU Operation Manual Using the CTU with a TB7100 15

DIGITAL/

PROGRAMMING

INPUTS

These switches let you set the digital inputs into the TB7100 high or low,

and are connected to the digital inputs on the system interface connector.

Switches 1 to 4 can be used for channel selection, and switch 6 is used to

control Rx Inhibit. The remaining switches are not used with the TB7100.

The active state of the digital inputs is defined by the setting in the

Programming Application software (Channel Setup > Programmable I/O >

Digital tab: AUX_GPI1, AUX_GPI2, AUX_GPI3, AUX_GPIO4). The

default setting is non-inverted: 0 = active, 1 = inactive.

Speaker The CTU is fitted with a 0.5W 16Ω speaker. Audio from LINE OUTPUT

or UB OUTPUT can be connected to this speaker.

VOLUME This controls the volume of the speaker. Rotate clockwise to increase the

volume, and anticlockwise to decrease the volume.

RSSI This output is used to monitor the RSSI output from the 25-way system

interface connector.

DIGITAL OUTPUTS Not used with TB7100.

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

RSSI. It is connected to the CTU and system interface connector ground.

TX RELAY This output is connected to the Tx Relay output on the 25-way system

interface connector. The LED is lit when the output is activated.

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 output is connected to the Rx Gate output on the system interface

connectors. The adjacent LED is lit when the receiver gate is open.

POWER Not used with TB7100.

SYSTEM CONTROL

BUS

Not used with TB7100.