Motorola SC725 Manuel d'utilisateur télécharger pdf

KMA 28

Audio Amplifier/Intercom/Marker Beacon Receiver

KMA 28

KMA 28 Operation

Receive Audio Selectors

Receiver audio is selected through

two momentary and six latched, push-

button, backlit switches. Com 1 and

Com 2 are the momentary switches.

Because the rotary microphone

selector switch controls what transceiv-

er is being heard, the Com l and Com

2 push-buttons are of the momentary

type and do not remain in when select-

ed. This is also part of the "auto" func-

tion. You will always hear the audio

from the transceiver that is selected for

transmit by the rotary mic selector

switch.

The users can identify which

receivers are selected by noting which

of the green switch LEDs are illuminat-

ed. Push buttons labeled Nav 1, Nav 2,

DME, MKR (Marker), ADF, AUX (auxil-

iary), and SPR (Speaker) are "latched"

type switches. When one of these but-

tons is pressed, it will stay in the "in"

position. Press the switch again and it

be in the "out" position and remove that

receiver from the audio.

Key "click"

The KMA 28 is equipped with an

electronic "click" to provide additional

feedback for button operation. To acti-

vate the key click, push and hold

BOTH COM 1 and COM 2 receiver but-

tons for five seconds, and release.

Repeat to defeat the click.

Speaker Amplifier

The "SPR" in the push-button sec-

tion stands for speaker. This switch will

place all selected audio on the cockpit

speaker when this switch is selected.

Public Address (PA) Function

The KMA 28 has a public address

capability when an optional external PA

switch is installed. When this switch is

put into the PA position, the pilot's

microphone is placed on a speaker out-

put. The copilot can continue to use

the selected Com radio.

When this PA function is installed a

separate cabin speaker (rather than the

cockpit speaker) is usually utilized to

prevent feedback.

OM I

PUSH

OFF/EMG

T/M

ISO

ALL

CREW

1 KMA 28 TSO

Com 1

Com 2

Nav 1

Nav 2

MKR

ICS

ADF

AUX

DME

SPR

Transmit Swap

COM 1

COM 2

COM 3

COM 1/2

COM 2/1

TEL

Mic Selector

Swap Indicator

Transmit Indicator

Speaker Switch

Crew ICS/Music 1 Mute

Mounting Screw

Intercom Mode Select

Intercom Volume

Marker Beacon

Indicator Lamps

Marker Beacon Sensitivity &

Test/Mute Select

Receive Audio Selectors

Photocell

KMA 28 Control Function

1 2 3 4 5 6

Résumé du contenu

Page 1 - Receive Audio Selectors

KMA 28Audio Amplifier/Intercom/Marker Beacon Receiver5KMA 28KMA 28 OperationReceive Audio SelectorsReceiver audio is selected throughtwo momentary and

Page 2 - Microphone Selector

Power Switch /Emergency(EMG) OperationUnit power is turned on and off bypushing the volume knob. In the off or"Emergency" position, the pilo

Page 3 - Intercom System

ingeneral aviation aircraft, it is proba-ble that there will be some bleed-overin the Split mode, particularly on adja-cent frequencies. In addition,

Page 4 - Volume Control

The system is designed to blockcontinuous tones; therefore peoplehumming or whistling in monotone maybe blocked after a few moments.For best performan

Page 5 - Marker Beacon Operation

matically mute and then will graduallyreturn to the original listening levelwhen the intercom or radio conversa-tion ceases.When in the All mode, pilo

Page 6 - Telephone Operation (if

"MKR" push-button switch.A three-position switch is used toset the receiver sensitivity and to testthe indicator lamps. Use "High"