
Equipment Installation Manual,
GDC31 Roll Steering Converter
Position/Rate Selection
The GDC31 is designed to operate with both position based and rate based autopilots. Configuration is set
by program pin P1-23.
Scaling J1-23
Position Based
Open
Rate Based
Ground
Table 4
Position / Rate Selection
Position based autopilots require attitude information from the attitude indicator or vertical gyro. Rate
based autopilots require turn rate information from the turn coordinator rate gyro. Determine the autopilot
type, if it is rate based then connect J1-23 to program pin common, J1-11.
Baud Rate Selection
The GDC31 will accept four (4) baud rates for GPS data configured using program pins P1-9 and P1-21.
Baud Rate
P1-9
P1-21
9600 Open
Open
2400 Open
Ground
4800 Ground
Open
19200 Ground
Ground
Table 5
Serial Baud Rate Selection
Note: Use Program Pin Common, J1-11, as ground for all program pin connections
GPS Receiver Setup
Refer to the manufacturer's instructions for the GPS interfaced to the GDC31 RSC. Configure the GPS to
output the Aviation Format data described in Appendix A.
1049-2510-01 G.doc
1049-2510-01
Rev G
Page 19 of 47