Garmin APOLLO GX SERIES, Service Manual

Page: 47 / 166

Garmin AT Rev --
© 2004 Garmin AT GX Service Manual 7-9
2. Seed Position, Time, and Date
Specification:
The GX includes a real time clock (RTC) for time and date information that must
be set after the system initialization. The seed time/date are required for
initialization of position sensors.
Operation:
During the normal operation startup sequence, enter the current date, time and
seed position on the Date/Time page, or go to the Date/Time page in system
mode and enter the current time, date, and seed position. Refer to the user’s
manual or installation manual.
Notes:
The GPS sensor requires the time, date, and position for proper startup. The
position can be selected from the database.
NAV Test Procedures
1. CDI Output
Description:
The CDI output is a differential output intended for driving a meter movement
with a maximum load of 200 ohms.
Setup:
If the TST-10 test station is not available, connect a standard CDI (or equivalent
meter) to the TO/FROM outputs.
Operation:
Select the CDI left, mid, and right outputs using the CDI Output page in test
mode.
Verification:
Verify the left/right indication as follows:
Left: meter full left
Mid: meter centered
Right: meter full right
Alternate:
If the TST-10 test station is not available, connect the unit to nominal input supply
voltage. Connect a 200-ohm load between the CDI+ Right and CDI+ Left outputs.
Verification:
Verify the differential output voltage between the CDI+ Right and CDI+ Left
outputs as follows:
Left: -150 mV ± 4 mVDC
Mid: 0 mV ± 2.0 mVDC
Right: +150 mV ± 4 mVDC
Verify the CDI+ Left output to ground is 2.05 volts ± 0.1 VDC.