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GTX 330 Installation Manual Page 1-3
190-00207-02 Revision G
1.5 Interface Summary
The GTX 330 provides the following interface connections via the rear connector:
• Ten (10) encoding altimeter inputs.
• External IDENT input.
• External STBY input (useful for dual transponder installations).
• External suppression pulse input.
• Switched power output of up to 1.5 amps (for digital altitude encoder power).
• Aircraft power input (11 to 33 volts).
• Aircraft dimming bus input voltage.
• Aircraft master switch turn-on option.
• Serial altitude or GPS groundspeed input.
• Serial altitude input. (Reduces wire count vs. parallel wire gray code altimeter interface.)
• Software update input.
• Supports Comm-A and Comm-B protocol.
• Temperature, Altitude Hold and Density Altitude.
• Digitally recorded voice and discrete warning annunciator activated by Altitude Hold when
limits are exceeded.
• Diversity: GTX 330 is available with or without the diversity feature.
The GTX 330 supports the following list of Binary Data Selector (BDS) registers:
• BDS (0,0) Air Initiated Comm-B (AICB)
• BDS (1,0) Data Link Capability Report
• BDS (1,7) Common Usage Ground Initiated Comm-B (GICB) Capability Report
• BDS (1,8) Mode S Specific Services GICB Capability Report
• BDS (1,9) Mode S Specific Services GICB Capability Report
• BDS (1,D) Mode S Specific Services Protocols (MSP) Capability Report
• BDS (2,0) Aircraft Identification