Garmin GMA 240 Audio Inputs/Outputs and Mic Keys, Intercom Key Inputs if configured

Page 30

4.5Audio Inputs/Outputs and Mic Keys

4.5.1Mic Audio Inputs and Mic Keys

Pin

Connector

 

Pin Name

Description

I/O

34

P2401

PILOT MIC KEY* IN

Enables respective MIC audio into

IN

33

P2402

COPILOT MIC KEY* IN

the selected transceiver unit

IN

33

P2401

PILOT MIC AUDIO IN HI

Pilot Mic audio input and ground

IN

 

 

 

reference

 

35

P2401

PILOT MIC IN LO

--

32

P2402

COPILOT MIC AUDIO IN HI

Copilot Mic audio input and ground

IN

 

 

 

 

reference

 

34

P2402

COPILOT MIC IN LO

--

 

35

P2402

PASS 1

MIC AUDIO IN HI

Passenger 1 Mic audio and ground

IN

36

P2402

PASS 1

MIC AUDIO IN LO

reference

--

37

P2402

PASS 2

MIC AUDIO IN HI

Passenger 2 Mic audio and ground

IN

38

P2402

PASS 2

MIC AUDIO IN LO

reference

--

*Denotes Active Low (Ground to activate)

4.5.2Intercom Key Inputs (if configured)

These inputs only perform the described ICS KEY function if the audio panel has been configured for KEYED ICS by configuration jumper settings (see Section 2.3.1). For this configuration, intercom squelch levels should be set fully CCW (live MIC) because the MIC signal must also break the VOX threshold to be heard.

Pin

Connector

Pin Name

Description

17

P2402

PILOT ICS KEY* IN

Enables respective mic audio to be heard

36

P2401

COPILOT ICS KEY* IN

in the intercom

37

P2401

PASSENGER ICS KEY* IN

 

*Denotes Active Low (Ground to activate)

4.5.3COM Audio and Mic Keys

Pin

Connector

Pin Name

Description

I/O

12

P2401

COM 1 MIC KEY* OUT

Enables transmission on the

OUT

30

P2401

COM 2 MIC KEY* OUT

respective transceiver unit

OUT

9

P2401

COM 1 AUDIO IN HI

COM 1 Audio Input

IN

11

P2401

COM 1 MIC AUDIO OUT HI

COM 1 Audio Output

OUT

10

P2401

COM 1 AUDIO LO

Ground Reference for COM 1

--

13

P2401

COM 2 AUDIO IN HI

COM 2 Audio Input

IN

15

P2401

COM 2 MIC AUDIO OUT HI

COM 2 Audio Output

OUT

14

P2401

COM 2 AUDIO LO

Ground Reference for COM 2

--

* Denotes Active Low (Sinks current to ground when active)

Page 4-6

GMA 240 Installation Manual

Rev. A

190-00917-01

Image 30
Contents GMA Record of Revisions DescriptionInformation Subject to Export Control Laws Section RangeThis page intentionally left blank Table of Contents Appendix a Outline and Installation Drawings List of Illustrations GMA 240 Hardware MOD Level History Introduction Equipment DescriptionFeatures Summary Technical SpecificationsCharacteristic Specification Physical CharacteristicsElectrical Characteristics Power Requirements Reference DocumentsPart Number Document Limited Warranty Blank Garmin P/N Installation MaterialsGMA 240 Wiring, Configuration, and Adjustment Options Equipment AvailableComponent Name Default Description Internal Configuration JumpersVOLUME/MUTE Configuration Adjustments MusicAccess Hole Location Top View Hardwire Configuration OptionNoise GMA 240 Mounting GMA 340 Unit RackUnpacking Unit Electrical ConnectionsPositioner GMA 240 Installation Audio Shield TerminationFailsafe Operation Check Post Installation CheckoutLamp Test Transceiver Operational CheckAircraft Receivers Check Music System CheckConnector Description Pin List1 P2401 Connector J2401 Pin Assignments Pin Name 2 J2402 Connector J2402 Pin Assignments Pin Name Aircraft Power Aircraft Power and Lighting3 P2403 Connector front panel 2.5 mm mini-jack Pin Connector Pin NameConfiguration Pins External Configuration PinsPin Connector Pin Name Description Intercom Key Inputs if configured COM Audio and Mic Keys Pin Connector Pin Name DescriptionAudio Inputs/Outputs and Mic Keys Failsafe Warning Audio Pin Alert Audio I/O Pin Connector Pin Name DescriptionAUX and NAV Audio Inputs Pin Connector Pin Name Description Pin Name DescriptionTel Audio I/O Pin Connector Pin Name Description Headset Outputs Pin Connector Pin Name DescriptionCOM Swap Pin Connector Pin Name Description Appendix a Outline and Installation Drawings Figure A-2. GMA 240 Connector/Rack Assembly Drawing Figure A-3. GMA 240 Recommended Panel Cutout Dimensions Appendix B Interconnect Drawings Figure B-1. GMA 240 Interconnect Drawing page 2 Figure B-1. GMA 240 Interconnect Drawing page 3 GMA240 J2401 Top of Main Board Bottom of Main Board

GMA 240 specifications

The Garmin GMA 240 is a state-of-the-art audio panel designed specifically for aviation applications. This device is known for its advanced features, user-friendly interface, and superior sound quality, making it a popular choice among pilots and aircraft owners. One of the standout characteristics of the GMA 240 is its ability to integrate seamlessly with a variety of communication and navigation systems, enhancing situational awareness and streamlining cockpit operations.

One of the main features of the GMA 240 is its capability to manage multiple audio inputs. The panel provides independent volume controls for the pilot and co-pilot, allowing each to adjust their audio levels according to their preferences. Additionally, the GMA 240 offers a dedicated input for auxiliary devices, such as smartphones or tablet computers, facilitating music playback or calls during flight.

The GMA 240 also incorporates advanced noise reduction technology. This feature minimizes ambient noise interference, ensuring that communication between the crew and air traffic control is crystal clear. The panel is equipped with a digital processing function that enhances audio clarity and reduces background noise, a critical asset in the typically noisy environment of an aircraft cockpit.

Another noteworthy characteristic of the GMA 240 is its intuitive operation. The layout of the controls is logical and straightforward, allowing pilots to adjust settings quickly and efficiently without distraction. This ease of use is crucial, especially during high-pressure situations when pilots need to maintain focus on flying while managing audio communications.

The GMA 240 supports a wide range of aircraft configurations, making it a versatile choice for various aviation needs. It is designed to be compatible with both general aviation and commercial aircraft, further extending its usability in different environments. The panel meets rigorous safety standards, ensuring it can withstand the demands of aviation use.

In terms of installation, the GMA 240 is engineered for easy integration into existing cockpits, requiring minimal modifications. Its compact design and robust build quality ensure durability even in challenging flight conditions.

In summary, the Garmin GMA 240 audio panel stands out for its combination of advanced features, user-friendly design, and high-quality performance. With its excellent noise reduction capabilities, independent audio controls for each crew member, and broad compatibility, it is an essential tool for enhancing communication and safety in the cockpit. This audio panel continues to be a preferred choice for aviation professionals seeking reliability and efficiency.