Cirrus SR22 Pilot Operating Handbook page 277

Cirrus Design
SR22
Stormscope WX-500 Weather Mapping Sensor
The Stormscope WX-500 System detects electrical discharges
associated with thunderstorms and displays the activity on the MFD.
The system consists of an antenna located on top of the fuselage and
a processor unit mounted under the aft baggage floor. The antenna
detects the electrical and magnetic fields generated by intra-cloud,
inter-cloud, or cloud to ground electrical discharges occurring within
200 nm of the airplane and sends the "discharge" data to the
processor. The processor digitizes, analyzes, and converts the
"discharge" signals into range and bearing data and communicates the
data to the MFD every two seconds via the secondary Integrated
Avionics Unit.
28 VDC for Weather System operation is supplied through the 5-amp
DATA LINK/WEATHER circuit breaker on AVIONICS BUS. Refer to
the Perspective Integrated Avionics System Pilot's Guide for a general
description of the system and its operating modes. If applicable, refer
to the L-3 Stormscope WX-500 Weather Mapping Sensor Pilot's Guide
for a detailed discussion of the system.
Bendix/King KR 87 Automatic Direction Finder (ADF)
The KR 87 ADF System is used as a means of identifying positions,
receiving low and medium frequency voice communications, homing,
tracking, and for navigation on instrument approach procedures. The
system consists of an antenna installed on the airplane exterior and
the KR 87 receiver which communicates with the Integrated Avionics
System via the secondary Integrated Avionics Unit. The HSI Bearing
Needle may be configured to indicate ADF tracking and homing
information. 28 VDC for ADF System operation is supplied through the
3-amp DME/ADF circuit breaker on AVIONICS BUS. Refer to the
Perspective Integrated Avionics System Pilot's Guide for a general
description of the system and its operating modes. Refer to the
Bendix/King ADF System Pilot's Guide for a detailed discussion of the
system.
Bendix/King KN 63 Distance Measuring Equipment (DME)
The KN 63 DME determines airplane distance to a land-based
transponder by sending and receiving pulse pairs - two pulses of fixed
duration and separation. The ground stations are typically collocated
with VORs. The system consists of an antenna installed on the
airplane exterior and the KN 63 receiver which communicates with the
Integrated Avionics System via the secondary Integrated Avionics
Unit. 28 VDC for ADF System operation is supplied through the 3-amp
P/N 13772-004 P/N 13772-004
Revision 1
Section 7
Systems Description
7-91 7-91