Garmin GMA 340 Додатковий посібник з експлуатації - Сторінка 9

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Cirrus Design

SR20

Marker beacon audio is selected by pressing the MKR push-button. If

no marker beacon signal is being received, pressing the MKR push-

button a second time deselects marker beacon audio. However, if

marker beacon is being received, pressing the MKR push-button a

second time will mute the audio but the light will continue to flash.

Pressing the MKR push-button a third time (while marker beacon

audio is muted) deselects marker beacon audio. Marker beacon audio

muting automatically disables when the current signal is no longer

received.

The marker beacon lamps (O, M, A) operate independently of

the audio and cannot be disabled.

Marker beacon light and audio keying for ILS approach are

summarized below:

O (Blue)

M (Amber)

A (White)

Marker Beacon Sensitivity

The SENS push-button on the left side of the panel is used to set the

marker beacon receiver sensitivity. The selected sensitivity level is

indicated by illumination of the HIGH or LOW LED. When HIGH

sensitivity is selected, the outer marker beacon tone will sound farther

out. Selecting LOW sensitivity at this point allows more accurate

location of the Outer Marker. Typically, HIGH sensitivity is selected

until the outer marker tone is heard, and then LOW sensitivity is

selected for more accurate outer marker location.

P/N 11934-S01

Revision 1: 07-18-05

Outer Marker light and associated 400 Hertz tone. The

light and tone are keyed at a rate of two tones/flashes per

second.

Middle Marker light and associated 1300 Hertz tone. The

light and tone are keyed alternately with short and long

bursts.

Airway/Inner Marker light and associated 3000 Hertz

tone. The light and tone are keyed at a rate of six times

per second.

• Note •

Section 9

Supplements

9 of 10