BendixKing KTR 909A - Manual (Page 6)

4
Annunciators
Three annunciators are displayed on the right side of the top display line. These
annunciators are:
• Transmit (TX)
• Main (MN)
• Guard (GD)
Transmit Annunciator
The Transmit Annunciator (TX) is illuminated when the microphone is keyed or the
1kHz Tone knob is pressed.
Main Annunciator
The Main Annunciator (MN) is illuminated when the radio is transmitting on the
main frequency, the radio is monitoring the main frequency (Main Mode), or the
receiver is monitoring both the main and the guard frequencies (Both Mode).
While in the Both Mode, the MN and GD annunciators are on.
Guard Annunciator
The Guard Annunciator (GD) is illuminated when the receiver is monitoring both
the main and guard frequencies (Both Mode). While in the Both Mode, the MN
and GD annunciators are on. If the receiver detects a signal on the Guard fre-
quency while in the both mode, the GD annunciator will be illuminated.
DETAILED OPERATING PROCEDURES
This section describes the detailed operating procedures for the KFS 599A UHF
Comm Control Head. The following topics are described:
• Power and Volume Control
• Selecting Receiver Mode
• Transmitting
• Entering a Manual Frequency
• Entering a Preset or Guard Frequency
• Programming a Channel
• X-Mode Operation
• Display Dimming
Power and Volume Control
Power is applied to the KFS 599A and the KTR 909/909A by rotating the
ON/OFF/VOL/TEST knob clockwise from the OFF detent position. The unit may
be turned off at any time by rotating this knob back into the OFF detent position.
Volume is controlled by rotating the ON/OFF/VOL/TEST knob. The audio level for
units without volume control is adjusted using the main aircraft audio/radio control
system.