Composite Indicator; Altimeter; Synchro Heading - Garmin GNS 480 Installation Manual

Installation Procedures
2.8.4 C
OMPOSITE
The GNS 480 provides a standard VOR/localizer composite output signal that may be used to drive the
left/right deviation, TO / FROM and valid flag indications of certain navigation indicators that contain an
internal converter. If an external converter is driven from the composite output, the composite output
will be disabled whenever the VOR monitor mode is active or back course localizer mode is enabled.
This will cause the external converter to flag.
P7-19 Composite Out
P7-37 Composite Ground
In the VOR mode, the composite signal output is 0.500 V
output is 0.390 V This output is capable of driving up to a 1000 load.
RMS.
Refer to Appendix D for interconnect information.
2.8.5 A
LTIMETER
The GNS 480 accepts altitude data serially, using either RS232 or ARINC 429 inputs. Refer to section
2.8.10 for additional information on the serial interfaces. In addition, the GNS 480 can accept the baro-
correction using the potentiometer output from a suitable altimeter. If baro-correction and uncorrected
pressure altitude are provided to the GNS 480, baro-corrected altitude will be output by the GNS 480.
P5-13 Baro In (W)
P5-33 Baro Hi
P5-53 Baro Lo
The GNS 480 must not be connected in parallel with other equipment using the
baro pot. Damage to the GNS 480 or other the equipment may occur if this is done.
Refer to Appendix D for altimeter baro potentiometer connections to several altimeters. Refer to section
3.2.1.4 for information on calibrating the baro potentiometer input.
2.8.6 S
YNCHRO
The GNS 480 accepts heading information using either a synchro input or serially, using either RS232 or
ARINC 429 inputs. Refer to section 2.8.10 for additional information on the serial interfaces. If synchro
heading is provided, refer to the paragraphs below. Refer to Appendix D for interconnect information.
2.8.6.1 Heading Synchro
P5-19 Hdg Synchro X
P5-18 Hdg Synchro Y
P5-38 Hdg Synchro Z
Connect these pins to an XYZ type directional gyro.
2-26
I
NDICATOR
CAUTION
H
EADING
560-0982-01 Rev A
In the localizer mode, the composite signal
RMS.
GNS 480 (CNX80) Installation Manual