VAL Avionics INS 422 Manual do Operador descarregar pdf (Página 12)

VAL AVIONICS LTD

INS 429 INTEGRATED NAVIGATION SYSTEM

INSTALLATION AND OPERATOR’S MANUAL

3.1.3.5 Selecting the Backcourse

When ILS is displayed in the mode display pressing and holding the right inner knob for three seconds will

enable the ILS in the back course mode and “BKCS” will be displayed in the Status display. While in the

back course mode the glide slope VDI display will be flagged. Pressing and holding the right inner knob

again for three seconds will return the ILS to the standard display mode.

3.1.3.6 Changing the Volume

The receiver’s audio volume is controlled by momentarily pressing both of the inner knobs at the same

time. “VOL” will be displayed in the standby frequency display and the volume level is indicated by the

numeric value after “VOL” (i.e. “VOL 15”). The volume level can be adjusted from 0 to 20 by rotating

the left hand large knob. Normal display operation resumes after 5 seconds or by pushing both knobs at

the same time.

3.1.3.7 Marker Mute

When the unit is selected to an ILS frequency and is displaying “ILS”, the marker receiver’s audio can be

muted for 1 minute by momentarily pressing the right button. This does not function on VOR frequencies.

3.2 System Configuration

3.2.1 Accessing Setup Functions

During startup, the unit’s setup can be assessed by pressing both buttons simultaneously until the unit’s

Mode display shows “CONF”. In this mode, the marker volume, marker mix, and external interface enable

can be configured. To select each individual setting, rotate the right outer knob until the Active Frequency

display and Standby Frequency display show the desired setting. To exit this mode and resume normal

operation, press both buttons simultaneously.

3.2.1.1 Marker Volume

When the Active Frequency display shows “Marker”, and the Standby shows “Vol”, the marker volume

can be adjusted by rotating the right inner knob. The settings range between 5 and 20 in accordance with

FAA regulation.

3.2.1.2 Marker Mix

When the Active Frequency display shows “Marker”, and the Standby shows “Mix”, the marker mix

function can be turned on and off. This function allows for the VOR/Localizer audio output (Pin 33) to

also contain the Marker audio signal. “On” mixes the audio onto that one line, “Off” separates the audio to

their separate lines as indicated on the wiring diagram.

Original Issue Page 12 of 21

August 2008

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VAL Avionics INS 422 Manual do Operador Página 12