BendixKing KTR 909A - Manual (Page 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
U
VOL
OFF
PUSH
TEST
CHAN
PUSH
TONE
PUSH
TONE
M
O
D
E