Garmin GMA 240 Installation Manual download pdf (Page 14)

GMA 240 Installation Manual 190-00917-01

Page 1-4 Rev. D

1.3.3 Power Requirements

1.4 Reference Documents

The following publications are sources of additional information for installing the GMA 240. Before

installing the unit, the technician should read all referenced materials along with this manual.

Music Functions

Music inputs (stereo): 2

Music input impedance: 600 Ω (differential)

Music gain: -20dB @ min volume, +26dB @ max. volume (typ.)

Music input level:<200 mVrms for full power* output @ max music volume knob

position (typ.)

3.5 Vrms max music input level

Music bandwidth: 20 Hz to 20 kHz @ full power output

Music distortion: <0.1% THD+N (typ.) @ full power, full bandwidth

Special Functions: Front panel selection and volume control

Front panel control for muting by radios and ICS

Muting by alerts configurable

*Full power output refers to 300 mW into 50 Ω (three 150 Ω headsets in parallel

each driven to 100 mW)

Front Panel Mini-

Jack Functions

Input Impedance: 5.1 kΩ

Music Input: Auto detection of music source will use jack as Music 1

Telephone Input: Auto detection of TEL source will use jack for TEL Telephone

ring signal is heard without TEL selected

Table 1-3 Power Requirements

Characteristic Specification

Input Voltage Range 11 to 33 Vdc

Power Input

4.3 W normal operation (310mA @ 13.8 V)

7.5 W max. operation (540 mA @ 13.8 V)

Table 1-4 Reference Documents

Part Number Document

190-00917-00 GMA 240 Pilot's Guide

190-00917-02 GMA 240 Maintenance Manual

Table 1-2 Electrical Characteristics

Characteristic Specification

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Garmin GMA 240 Installation Manual Page 14