Bendix/King Skymap IIIC Panduan Pilot - Halaman 4

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On/Off/Vol/Test Knob

The On/Off/Vol/Test Knob turns the KFS 599A UHF

Comm Control Head on, off, and adjusts volume when

rotated. Pressing this knob alternately removes and

applies squelch.

On units without volume control, the audio level is con-

trolled by the aircraft audio/radio control system.

Channel Select Button

The Channel Select button switches the unit between the manual and

preset frequency selection modes and also enables the programming

mode. Manual frequency selection (when top display line is blank)

allows direct tuning of the frequency. Preset frequency selection (Channel number

displayed in the top line) allows radio tuning using one of the twenty preset chan-

nels or the guard frequency. Pressing and holding the CHAN button for more than

three seconds activates the Program Mode.

Frequency/Channel Select Knob

•

Manual Frequency Mode — Outer knob tunes the trans-

ceiver in 1 MHz steps. Inner knob tunes the transceiver in

25 kHz steps.

•

Preset/Guard Channel Mode — Both the outer and the

inner knobs change the channel number.

Push Tone Button

Pressing this button activates the 1 kHz tone transmitter test (not

available while in the BOTH receiver mode).

Mode Button

Pressing the MODE button selects the Main, Both, or ADF mode of operation.

The Main mode enables receiving and transmitting on the displayed frequency

and is indicated by the MN annunciator. In the Both mode, the receiver scans

the main and guard frequencies. Both the GD and the MN annunciators illuminate

during scan. When a signal is detected, the receiver stops on the active frequency

and illuminates the active frequency annunciator. Scanning will resume when the

receiver becomes inactive. The ADF mode activates an independent ADF receiver.

Displays

This section describes the different display formats of the KFS 599A UHF Comm

Control Head. These are:

•

Preset Channel/Guard Display

•

Manual Tuning Display

•

Programming Mode Display

•

ADF Mode Display

VOL

OFF

PUSH

TEST

CHAN

PUSH

TONE

PUSH

TONE