TracVision M5/M7 User’s Guide
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Appendix A - Advanced Settings and Functions
Data Output Settings
This section explains how to modify the GyroTrac sensor’s data output
settings.
Overview
The TracVision system’s GyroTrac sensor transmits up to five
selectable message types simultaneously to external navigation
devices connected to the ADCU. One output port is dedicated to the
sine/cosine signal format. Three serial ports allow outputs of
NMEA 0183, KVH RS-422, and Cetrek proprietary signal formats.
Each of these message formats are described in the following sections.
Sine/Cosine Data Output
The TracVision system’s GyroTrac sensor can be configured to provide
either 3-wire or 4-wire sine/cosine output, but not both. The sine/
cosine output is commonly used in ComNav
®
, Robertson
®
, and other
autopilot systems.
TIP:
The B&G 4-wire sine/cosine output (also known as the “differential
sine/cosine”) is a substitute of the Halcyon compass output. The reference
voltage should be set to 3.5 volts.
NOTE:
The maximum current that can be drawn from the sine/cosine output
is 10 mA.
Sine/cosine setup requires the following to be selected:
• Magnetic or true heading
• Reference voltage (valid range is 0 - 6.5 volts, default value is
2.5 volts)
• Swing voltage (valid range is 0 - 6.5 volts, default value is
±1.67 volts)