User's Manual

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TB8100 Installation and Operation Manual Description 9

1 Description

The TB8100 is a software-controlled base station system (BSS) which is

designed for operation on most standard frequency ranges

. It makes

extensive use of digital and DSP technology. Many operating parameters

such as channel spacing, audio bandwidth, signalling, etc. are controlled by

software. It is also capable of generating alarms for remote monitoring.

The TB8100 BSS comprises a number of separate modules. Each module

is inserted into the TB8100 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 which 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.

All modules are interconnected at the front of the subrack. The only

connections at the rear of the subrack are:

■ RF input from and output to the antenna

■ external frequency reference input

■ AC and/or DC power supply input

■ auxiliary 40W 13.8VDC output (optional)

■ system inputs and outputs (via the optional system interface PCB fitted

to the reciter).

The TB8100 BSS features rugged construction with generous heatsinks and

fan-forced cooling for continuous operation from –30°C to +60°C (–22°F

to +140°F). Several different configurations are possible. The most

common are:

■ one 5 or 50W base station plus accessory modules or extra receivers

■ two 5 or 50W base stations

■ one 100W base station plus accessory modules or extra receivers.

1. Consult your nearest Tait Dealer or Customer Service Organisation for

information on the most suitable equipment for your area and application.

Summary of content (6 pages)

PAGE 1
Description The TB8100 is a software-controlled base station system (BSS) which is designed for operation on most standard frequency ranges1. It makes extensive use of digital and DSP technology. Many operating parameters such as channel spacing, audio bandwidth, signalling, etc. are controlled by software. It is also capable of generating alarms for remote monitoring. The TB8100 BSS comprises a number of separate modules.
PAGE 2
1.1 The TB8100 BSS Modules The modules which make up the TB8100 BSS are described briefly below. You can find more detailed information on these modules in the other chapters in this manual, and also in the service manual. Reciter The receiver, exciter and digital control circuitry is located in the reciter module. It also incorporates an optional system interface PCB which provides standard system inputs and outputs.
PAGE 3
Front Panel The TB8100 front panel is mounted onto the subrack with two quickrelease fasteners. It incorporates the cooling fans for the PA and PMU. Control Panel The TB8100 control panel is mounted onto the subrack and is accessible through an opening in the front panel. It provides the user with hardware controls and connections for direct control of the BSS. Subrack The TB8100 4U subrack is made of passivated steel and is designed to fit into a standard 19 inch rack or cabinet.
PAGE 4
1.2 Mechanical Assembly The main mechanical components of the TB8100 BSS are shown in the following illustrations. Figure 1.
PAGE 5
The single PA is mounted vertically with the heatsink facing the centre of the subrack. This positions the cooling fins directly behind the PA fan. The airflow separator is fitted directly beside the PA to help direct the cooling airflow through the heatsink. Figure 1.2 Mechanical Assembly - Dual 5 or 50W Base Station h b b c d e c PMU PA for base station 1 airflow separator d e f f g h g reciter for base station 1 reciter for base station 2 subrack PA for base station 2 Figure 1.
PAGE 6
Figure 1.3 Mechanical Assembly - Single 100W Base Station i h g b b c d e PMU PA airflow duct reciter c f e d f g h i module retaining clamp plastic guide rail subrack cable retaining clip Figure 1.3 above shows the configuration for a typical single 100W base station. The PMU occupies its normal slot at the left end of the subrack, with the PA directly beside it. The single reciter occupies the slot immediately to the right of the PA.