Cirrus SR22 Pilot Operating Handbook page 488

Section 9
Supplements
Communication (COM) Transceiver
The GNS 430W
communications (COM) transceiver. The COM 1 antenna is located
above the cabin on the airplane centerline.
28 VDC for transceiver operating is controlled through the Avionics
Master Switch and supplied through the 7.5-amp COM 1 circuit
breaker on the Avionics Essential Bus.
Avionics Integration
The GNS 430W Navigator is integrated into the airplane avionics
installation in two configurations:
1. Single GNS 430W (GPS 1) interfaced with the PFD and MFD and
a single GNC 420W (GPS 2) interfaced with the MFD (VOR/LOC)
indicator.
• GPS 1 in this configuration is a GNS 430W Navigator with VHF
COM interfaced with the PFD and MFD as GPS 1/VLOC 1.
Select NAV Source to GPS 1 or VLOC 1 through the PFD's
NAV select button. With source set to GPS 1 or VLOC 1, it can
be alternately set between GPS or VLOC by the CDI button on
the navigator. The active source is identified on the PFD.
• GPS 2 in this configuration is a GNS 420W Navigator with VHF
COM interfaced with the PFD and MFD as GPS 2. Select NAV
Source to GPS 2 through the PFD's NAV select button. The
active source is identified on the PFD.
2. Dual GNS 430W units are installed. GPS 1 in this configuration is
the uppermost GNS 430W unit in the console and GPS 2 is the
lower GNS 430W unit.
• GPS 1 in this configuration is a GNS 430W Navigator with VHF
COM interfaced with the PFD and MFD as GPS 1/VLOC 1.
Select NAV Source to GPS 1 or VLOC 1 through the PFD's
NAV select button. With source set to GPS 1 or VLOC 1, it can
be alternately set between GPS or VLOC by the CDI button on
the navigator. The active source is identified on the PFD.
• GPS 2 in this configuration is a GNS 430W Navigator with VHF
COM interfaced with the PFD and MFD as GPS 2/VLOC 2.
Select NAV Source to GPS 2 or VLOC 2 through the PFD's
NAV select button. With source set to GPS 2 or VLOC 2, it can
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includes a digitally-tuned
Cirrus Design
SR22
integrated VHF
P/N 13772-132
Revision 01: 11-11-07