DMR Base Stations/Repeaters Options and Accessories

 The modular design of the TB9300 base station/repeater makes for easy maintenance, expansion and upgrading. Front-loading modules slip into the 4U subrack, making building the system, replacing a module or accessing a system interface board fast and simple.
To enhance the functionality and servicing of the TB9300 base station/repeater, there are a number of accessories and options available from Tait including:

TB9300 modules


The reciter contains the receiver, exciter and network board, and has the following functions carried out via a state-of-the-art RISC processor and DSP:

  • controlling base station/repeater operation
  • Storing the channel table and other configuration operation
  • holding licenses for optional features
  • collecting faults from other modules and generates alarms
  • running Task Manager

Power Amplifier

The PA is available as 5W, 50W, and 100W modules, and receives the RF signal from the reciter to amplify it to the required level. The reciter controls the frequency based on its channel table and tells the PA what power level to use. The PA then waits for the key-up signal.

Power Management Unit

The PMU is sized to provide sufficient power for one subrack (50W channel or one 100W channel). It offers the following features:

  • power factor corrected
  • can operate with mains supply from 88-264 VAC (no switching required)
  • DC supplies have floating inputs so the supply can be negatively or positively earthed
  • optional auxiliary power output (12, 28 & 48V at 40W) for powering external equipment
  • optional standby module for maximum power saving capability

Network Board

The Network Board provides comprehensive control of a Tait DMR system, including access to multiple interfaces such as Ethernet, line audio, digital inputs and outputs, and also a coaxial relay drive output, Tx Key, and Rx Gate.

Subrack, front panel, control panel

The TB9300 is enclosed in a subrack with a front panel and control panel. The passivated steel subrack is very compact at 4U high, and is designed to fit into a standard 19 inch rack or cabinet.

The front panel incorporates the cooling fans for the PA and the PMU. The user can replace both the front panel and the individual fans if necessary.

The control panel is mounted onto the subrack independently of the front panel. It features a microphone socket, controls keys, LEDs, speaker and volume control knob.

Software Licenses

Tait's TB9300 software licenses are used to enable advanced features of the base station/repeater. Licenses are applied on a per-feature and per-reciter basis. This software license system means that you can select and pay for those features that you need rather than buying a base station/repeater with many features you may not use. This gives you the flexibility to add extra features when you wish to simply by upgrading the software.

For a complete list of available software licenses, please contact your local Tait representative.