Garmin GTX 320 ATC - Manual (Page 5)

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