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March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-79
Avionics Support Equipment
Antennas
Two rod-type COM antennas are mounted to the aircraft’s exterior;
COM 1 is mounted directly above the passenger compartment, COM 2
is mounted directly below the baggage compartment. These antennas
are connected to the two VHF communication transceivers contained
in the Integrated Avionics Units.
The optional blade-type DME antenna is mounted on the aircraft
underside just aft, right of the firewall.
The optional combined loop/sense ADF antenna is mounted to the
underside of the airplane just aft of the main wing spar. The antenna
combines antenna signals into a single signal input to the ADF
receiver.
A sled-type marker beacon antenna is mounted to the underside of the
airplane below the baggage compartment and provides a signal to the
marker beacon receiver located in the GMA 347 audio panel. If the
optional air conditioning system is installed this antenna is located
below the baggage floor inside of the aircraft.
The transponder antenna is located on the bottom side of the airplane,
just aft of the baggage compartment bulkhead on the RH side of the
aircraft.
GPS 1 antenna is mounted directly above the passenger
compartment. If the optional XM system is installed, a combination
GPS1/XM antenna is installed in this location. GPS 2 antenna is
mounted just forward of the baggage compartment window. These
antennas are connected to the two GPS receivers contained in the
Integrated Avionics Units.
The optional Skywatch antenna is mounted just above the pilot/copilot
compartment.
The optional The WX-500 Stormscope antenna is mounted directly
above the passenger compartment.
The Navigation antenna is mounted to the top of the vertical fin. This
antenna provides VOR and glidescope signals to the VHF navigation
receivers contained in the Integrated Avionics Units.
Headset and Microphone Installation
The airplane is equipped with provisions for four noise-canceling
headsets with integrated microphones. The forward
March 2010
7-80 Information Manual
Section 7 Cirrus Design
Airplane and Systems Description SR22
microphone-headsets use remote Push-To-Talk (PTT) switches
located on the top of the associated control yoke grip. The rear
headsets do not have COM transmit capabilities and do not require
PTT switches. The microphone (MIC), headset, and automatic noise
reduction (ANR) power jacks for the pilot and front seat passenger are
located in the map case and similar jacks for the aft passengers are
located on the aft portion of the center console. Audio to all four
headsets is controlled by the individual audio and volume selectors on
the audio control panel.
Audio Input Jack
Two 3.5 mm audio input jacks (AUDIO INPUT) are provided on the aft
portion of the center console. One jack is located near the
convenience outlet for use by the pilot and forward passenger, and
another is located further aft by the rear passenger ANR power jacks.
These jacks can be used to plug in personal entertainment devices
such as portable radios, cassette players, or CD players. Audio volume
through these jacks is controlled by connected individual
entertainment device.
Cell Phone Input Jack
One 2.5 mm cell phone jack (CELL PHONE INPUT) is provided on the
aft portion of the center console near the convenience outlet. This jack
provides full-duplex telephone interface with intercom isolation and
disable capability. Cabin audio volume through this jack is controlled
by the volume selector on the audio control panel.
Avionics Cooling Fans
Electric fans provide forced ambient-air cooling for the Integrated
Avionics System. A fan located forward of the instrument panel
provides ambient air cooling directly to the Integrated Avionics Units.
Two additional fans blow air directly onto the heat sinks located on the
forward sides of the PFD and MFD. Serials 3026 thru 3369; Air is
ported directly into the transponder by a single fan in the empennage
avionics bay.
28 VDC for MFD and Transponder Fan operation is supplied through
the 5-amp AVIONICS FAN 1 circuit breaker on NON-ESSENTIAL
BUS. 28 VDC for PFD and Integrated Avionics Unit Fan operation is
supplied through the 5-amp AVIONICS FAN 2 circuit breaker on MAIN
BUS 2.
March 2010
Cirrus Design Section 7
SR22 Airplane and Systems Description
Information Manual 7-81
Cabin Features
Emergency Locator Transmitter
　
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