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190-00133-02 Rev B 1-2
Figure 1-1. ATCRBS System
1.4 EQUIPMENT DESCRIPTION
The GTX 320 consists of two major assemblies, the Main PCB Assembly and the Front Subassembly.
1.4.1 Main PCB Assembly (Not Field Repairable)
The Main PCB Assembly contains the following circuits:
IF Amplifier and Pulse Discriminator
Local Oscillator and Mixer
Power Supply
Programmable Logic Device
Light Dimming Circuitry
Modulator and Transmitter
1.4.2 Front Subassembly (Field Replaceable)
The Front Subassembly consists of the following:
Reply Code Switches and Mode Function Selector
Front Display and Knobs
Backlighting Circuitry
Front PCB Assembly