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) Press-to-transmit (PTT) switches. A PTT switch is located on each of the pilots' control sticks. ) Head-set-sockets. Head-set-sockets are located on the back of the center console for both the pilots and the passengers. ) Cabin speaker. The cabin speaker is located in the roof of the cockpit.
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AMM
Section 23-10
Speech Communication
1. General
This Section tells you about the speech communication system in the DA 40. It does not tell you about the speech communication equipment. Refer to the equipment manufacturers' manuals for more data about the equipment.
This Section also tells you about the NAV function of the NAV/COM receivers. Refer to Section 34-52
for more information about the VOR/LOC/GS system. Refer to Section 23-50 for information about % the audio system. Refer to Section 34-58 for more information about the GPS system of the % NAV/COM/GPS units.
The NAV/COM system can have the following components: %) NAV/COM 1 (Bendix/King KX 125, KX 155A, KX 165A; Garmin GNS 430, GNS 530). %) NAV/COM 2 (Bendix/King KX 155A; Garmin GNS 430). ) COM 1 antenna. ) COM 2 antenna. ) NAV (VOR/LOC/GS) antenna. %) NAV antenna coupler (Comant CI 505, CI 1125). %) Ground COM #2 switch.
Figure 1 shows the antenna locations.
Doc # 6.02.01 Page 1
Rev. 4 09 Jan 2003
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COMM 1
Active NAV
OBS Setting
Standby COMM Frequency Display
Figure 2: Bendix/King KX 125 NAV/COM
Page 2 Doc # 6.02.01 09 Jan 2003 Rev. 4
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Communications
AMM
2. Description
A. KX 125 NAV/COM
Figure 2 shows the KX 125 NAV/COM. It is located in the avionics rack in the instrument panel, % see Chapter 31.
The KX 125 is a communications transceiver and navigation receiver. The equipment can receive COM signals from 118 MHz to 136.975 MHz in 25 kHz increments. This gives 760 communication channel operation. The equipment can receive NAV signals from 108 MHz to 117.95 MHz in 50 kHz increments. This gives 200 navigation channel operation.
The left side display shows the COM frequency data. The top line shows the active COM and the bottom line shows the standby COM frequency. When the equipment transmits a TX annunciator comes on next to the active COM frequency.
The right side display shows the NAV frequency data. The top line shows the active NAV frequency and the bottom line shows the standby NAV frequency.
The center display shows this navigation information:
) CDI Mode. The Course Deviation Indicator (CDI) is the top half of the center display. When the KX 125 receives valid navigation information and CDI mode is selected the CDI will operate. In CDI mode, a line of dots either side of a center “0" makes the course deviation indicator. Vertical bars appear to one side of the center “0" to tell the pilot how far the airplane is deviating from the selected course. Each dot shows 2° of deviation.
In normal CDI operation the “OBS” annunciator appears under the CDI with the selected Omni-Bearing-Selector (OBS) bearing. A TO/FR annunciator tells the pilot if the bearing is to, or from, the selected station. The “FLAG” indicator shows in the bottom right of the display when no valid signals are being received in CDI mode.
) BEARING (BRG) Mode. When bearing mode is selected and a valid signal is being received a three-digit bearing and the “TO” annunciator show in the bottom half of the center display. A row of dashes show when the receiver is not receiving a valid signal.
) RADIAL (RAD) Mode. When radial mode is selected and a valid signal is being received a three-digit radial and the “FR” annunciator show in the bottom half of the center display. A row of dashes show when the receiver is not receiving a valid signal.
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