2.3.1Internal Configuration Jumpers

The following internal configuration adjustments may be made by removing or replacing jumpers on the PCB. The jumper positions are designed to accept a 0 resistor of 0603 size. Refer to Appendix C for component location.

This service should only be performed by a qualified technician. Garmin is not responsible for damage caused during adjustment of these internal configuration jumper settings. Refer to the GMA 240 Maintenance Manual for disassembly/reassembly instructions.

The GMA 240 contains static sensitive components. Observe proper anti-static procedures when performing any solder procedures on the unit.

Component

Name

Default

Description

 

 

 

 

R0303

Alert Mutes

Populated

If this jumper is removed, music will not be

 

Music

 

interrupted by alert audio. Default operation

 

 

 

is recommended.

 

 

 

 

R0304

COM1 Internal

Empty

If a jumper is supplied in these positions,

 

Sidetone

 

internal sidetone will be heard during PTT to

 

 

 

simulate received sidetone from a radio that

R0305

COM2 Internal

Empty

does not provide one during transmission.

 

Sidetone

 

 

 

This should only be used if a radio does not

 

 

 

 

 

 

perform this function already.

 

 

 

 

R0308

TEL Internal

Populated

If this jumper is removed, intercom audio

 

Sidetone

 

and intercom sidetone will not be heard

 

 

 

when the TEL button is selected. Many

 

 

 

phones supply sidetone when a call is in

 

 

 

session. This causes a noticeable change in

 

 

 

intercom sound quality but it is usually not

 

 

 

disruptive. Default operation is

 

 

 

recommended unless the effect of sidetone

 

 

 

from the telephone is disruptive to intercom

 

 

 

operation.

 

 

 

 

R0315

TEL jack detect

Empty

If a jumper is supplied in this position, when

 

bypass

 

TEL is selected the audio panel will assume

 

 

 

a telephone is in use in the front jack

 

 

 

regardless of phone detection. This should

 

 

 

be used only if the audio panel is not

 

 

 

capable of properly detecting the telephone

 

 

 

that will be used in the installation.

 

 

 

 

Page 2-2

GMA 240 Installation Manual

Rev. A

190-00917-01

Page 16
Image 16
Garmin GMA 240 installation manual Component Name Default Description, Internal Configuration Jumpers

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.