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TB9100/P25 CG/P25 TAG Installation and Operation Manual Description 13

trunked analog gateway has limited functionality. The Power and Alarm

LEDs are used, but none of the other controls are operational.

Any references in this manual to the following do not apply to the gateways:

■ Transmitting

■ PA

■ Receiving.

The gateway has one capability that the base station does not have. It can

serve as an encryption/decryption point. Many references to encryption

apply only to the gateway.

When “base station” is referred to, this generally applies to the console

gateway and trunked analog gateway as well. When “reciter” is referred to,

this generally applies also to the gateway module.

1.3 Modules

The base station or gateway consists of a subrack with one of the following:

■ Up to two transmit/receive channels.

■ Up to five receive-only or gateway channels with a PMU.

■ Up to seven receive-only or gateway channels (external power supply

required).

The one PMU supplies and manages power to the whole subrack. One

reciter or gateway module is needed for each channel and one PA is needed

for each transmit/receive channel. There is also a front panel with fans, and

a control panel. The modules are interconnected at the front of the subrack.

External connections to the modules are located at the rear.

Modules come in different variants depending for example on the RF band

or the supply voltage. The PA and the PMU are common to the TB8100

base station. Receive-only base stations and gateways do not need PAs.

Each module is inserted into the 4U subrack from the front and is secured

at the front with a metal clamp. Both clamp and module are easily removed

for rapid module replacement. The modules are secured laterally with plastic

guides that clip into the top and bottom of the subrack. These guides can be

easily repositioned to change the configuration of a subrack. The heavier

modules are also secured laterally by metal tabs at the rear of the subrack.

The following provides a brief description of the available modules.

Tait TB9100 User Manual

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