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bracket.
(3) Connect the connectors at the unit.
(4) Install the instrument panel cover. Refer to Section 25-10.
AIRCRAFT
DA 40 Series
AMM
Communications
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8. NAV/COM Test
If possible, do an operational flight check after the radio has been replaced. Alternatively use a
NAV/COM test set to make sure that the system operates correctly. Refer to the manufacturer's
Installation Manual for performance specifications.
Detail Steps/Work Items Key Items/References
(1) Do a test of each control function. Refer to Section 23-10 and Section
34-52.
(2) At a sufficient altitude, contact a ground station at
least 50 NM away and another close by.
If possible, select stations with
frequencies at both the high and low
end of the NAV/COM band.
(3) Test the VOR system at 4000 ft. Select a VOR
frequency within a 40 NM range. Listen to the
station identifier. Test the operation of the tone
identifier filter. Fly inbound and outbound on a
selected VOR radial. Look for the correct
LEFT/RIGHT and TO/FROM indications. Monitor
the VOR accuracy.
(4) Do a test of the DME remote channeling. If installed.
(5) Do a test of localizer (LOC) and glideslope (GS)
operation and accuracy on a suitable runway.
(6) If necessary, adjust the viewing contrast of the
LCD display.
Through the access hole in the front
panel.
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AMM
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DA 40 Series
AMM
Communications
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Section 23-50
Audio Integrating
1. General
The audio system in the DA 40 has the following components:
) Audio panel. One of the following audio panels can be installed in the DA 40:
) PM 1000 II voice-activated (VOX) intercom, see Figure 1.
) Bendix/King KMA 28 audio amplifier with voice-activated (VOX) intercom, see Figure 2. This unit
also includes a marker beacon receiver.
) Garmin GMA 340 audio amplifier with voice activated (VOX) intercom, see Figure 3. This unit
also includes a marker beacon receiver.
) Sockets for 4 head-sets on the rear face of the center console.
) Press-to-transmit (PTT) switches in the handles of both control sticks.
) Cockpit speaker in the roof of the cockpit.
) Socket for hand-held microphone on the bottom left side, or bottom center of the instrument panel.
The voice-activated intercom gives full hands-free intercom when head-sets are used.
AIRCRAFT
Communications DA 40 Series
AMM
Page 2
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Rev. 5
ISO
ALL
CREW
Figure 1: PM 1000 II Intercom
AIRCRAFT
DA 40 Series
AMM
Communications
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Rev. 5 23-50-00 Page 3
20 Sep 2007
2. Description
A. PM 1000 II Intercom
Figure 1 shows the PM 1000 II Intercom. It is mounted above the NAV/COM 1 set in the avionics
rack in the instrument panel, see Chapter 31.
The PM 1000 II is a four channel VOX intercom with individual amplifiers for each outlet. The headset
jack-plugs connect to the PM 1000 II. When the unit is set to OFF (or when the power fails), an
internal relay connects the pilots head set to the airplane radio. This gives fail-safe operation. A 2-
color LED in the control panel shows green when the power is on and red during radio
transmissions. The LED functions as stuck mic indicator.
The PM 1000 II has these controls:
) A Pilot's ON/OFF/VOLUME/SQUELCH switch. Turn the inner knob clockwise to switch the
intercom ON. Turn the knob to control the volume in the pilots headset. The outer (squelch)
knob adjusts the level at which the mic operates the intercom. When the knob is set fully
counter-clockwise the ambient noise will operate the intercom. This gives a “Hot mic” effect. Set
the squelch to operate at a level that is correct for you. The VOX system has a one second
delay, this prevents “choppy” speech.
) A Co-Pilot's VOLUME/SQUELCH switch. Turn the inner knob to adjust the volume in the copilots
headset. The outer (squelch) knob adjusts the level at which the co-pilots and passenger
mics operate the intercom. When the knob is set fully counter-clockwise the ambient noise will
operate the intercom. This gives a “Hot mic” effect. Set the squelch to operate at a level that is
correct for you. The VOX system has a one second delay, this prevents “choppy” speech.
) An ISO/ALL/CREW switch. The PM 1000 II has three modes of operation:
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