Garmin GMA 240 installation manual Electrical Characteristics

Page 11

1.3.2Electrical Characteristics

Characteristic

 

 

Specification

 

 

 

Temperature Range

-20°C to +55°C (operation)

 

 

-55°C to +85°C (storage)

 

 

 

 

 

Altitude

55,000 Feet

 

 

 

 

Audio Panel

Dedicated Transceiver inputs: 3 (including TEL)

Functions

Dedicated Receiver inputs: 4 (all independently selectable)

 

 

Alert (unswitched) inputs: 3 (each with configurable volume)

 

Input impedance:

500

 

 

Input isolation: 60 dB minimum

 

 

Alert/Receiver/Transceiver bandwidth: 100 Hz to 6.5 kHz

 

Special functions: Fail-safe operation

 

 

 

MASQprocessing (Master Avionics Squelch)

 

 

 

Configurable button push aural annunciation

 

 

 

Intercom Functions

Positions:

4 (pilot, copilot, 2 passengers)

 

Volume controls: 3 (pilot, copilot/passengers, music)

 

VOX level controls: 2 (pilot, copilot/passengers)

 

VOX circuits: 4 (one per mic input)

 

Microphone input impedance: 450 (compatible with 150 to 600

 

 

mics)

 

 

Microphone bias voltage: about 10 Vdc delivered through 450

 

Microphone response: 9-pole characteristic cabin noise de-emphasis

 

Intercom isolation modes: 2 – all, pilot (or configure for all, crew)

 

Telephone interfaces: 1 full-duplex (use LRU pins or front jack)

 

 

 

Headphone Outputs

Output amplifiers:

2 stereo (pilot, copilot/passengers)

 

Fidelity:

Load

Power

Distortion (typ.)

 

 

150

50 mW

<0.03% THD+N

 

 

150

100 mW

<0.07% THD+N

 

 

50

150 mW

<0.07% THD+N

 

 

50

300 mW

<0.10% THD+N

 

Compatible with higher headphone impedances, those shown are for worst-case

 

distortion and bandwidth

 

 

 

 

 

 

GMA 240 Installation Manual

Page 1-3

190-00917-01

Rev. A

Image 11
Contents GMA Description Record of RevisionsSection Range Information Subject to Export Control LawsThis page intentionally left blank Table of Contents Appendix a Outline and Installation Drawings List of Illustrations GMA 240 Hardware MOD Level History Equipment Description IntroductionPhysical Characteristics Technical SpecificationsCharacteristic Specification Features SummaryElectrical Characteristics Part Number Document Power RequirementsReference Documents Limited Warranty Blank Equipment Available Installation MaterialsGMA 240 Wiring, Configuration, and Adjustment Options Garmin P/NInternal Configuration Jumpers Component Name Default DescriptionMusic VOLUME/MUTE Configuration AdjustmentsHardwire Configuration Option Access Hole Location Top ViewNoise GMA 340 Unit Rack GMA 240 MountingPositioner Unpacking UnitElectrical Connections Audio Shield Termination GMA 240 InstallationTransceiver Operational Check Post Installation CheckoutLamp Test Failsafe Operation CheckMusic System Check Aircraft Receivers CheckPin List Connector Description1 P2401 Connector J2401 Pin Assignments Pin Name 2 J2402 Connector J2402 Pin Assignments Pin Name Pin Connector Pin Name Aircraft Power and Lighting3 P2403 Connector front panel 2.5 mm mini-jack Aircraft PowerPin Connector Pin Name Description Configuration PinsExternal Configuration Pins Audio Inputs/Outputs and Mic Keys Intercom Key Inputs if configuredCOM Audio and Mic Keys Pin Connector Pin Name Description Pin Name Description Alert Audio I/O Pin Connector Pin Name DescriptionAUX and NAV Audio Inputs Pin Connector Pin Name Description Failsafe Warning Audio PinCOM Swap Pin Connector Pin Name Description Tel Audio I/O Pin Connector Pin Name DescriptionHeadset Outputs 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.