7-88 P/N 21399-004
Section 7 Cirrus Design
Airplane and Systems Description SR20
Optional Avionics
GFC 700 3-Axis Autopilot and GMC 705 Autopilot Controller
Refer to latest revision of AFM Supplement 11934-S41 GFC 700
Automatic Flight Control System for operating information.
GTX 33 Mode S and GTX 33 ES Mode S Transponders
The GTX 33 Mode S and GTX 33 ES Mode S solid-state transponders
communicate with the primary Integrated Avionics Unit and provide
Modes A, C, and S interrogation/reply capabilities. The GTX 33 ES
Mode S transponder includes Extended Squitter ADS-B Out. The
transponders are controlled via the PFD or Flight Management
System Keyboard and are located in the empennage avionics
compartment.
28 VDC for Mode S Transponder operation is supplied through the 2-
amp XPONDER circuit breaker on AVIONICS BUS. Refer to the
Perspective Integrated Avionics System Pilot’s Guide for a complete
description of the system, its operating modes, and additional detailed
operating procedures.
GSR 56 Iridium Satellite Network Transceiver
The Iridium Satellite Network Transceiver, mounted in the empennage
avionics compartment, communicates with the primary Integrated
Avionics Unit and Audio Panel to provide near real-time weather,
voice, and data services to the cabin audio system and integrated
displays. The GSR 56 receives near real-time satellite weather
information for display on the MFD and PFD and can also provide
telephone/voice communications and text messaging (SMS) through
the Iridium Satellite Network. The voice service is available through
the audio panel via the TEL (telephone) input selection. SMS and
weather products are displayed on the MFD.
28 VDC for Iridium Satellite Network Transceiver 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 complete description of the system, its operating
modes, and additional detailed operating procedures.
Revision A1
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