NorthStar Navigation GM1708 961XD - Manual (Page 46)

SECTION TWO - Installation
Page 36 961 INSTALLATION MANUAL Revision A
PROCESSOR
(cont’d)
Configuration
No GPS or DGPS • Possible incorrect installation of the
AS110/AS105 splitter cables; they
may be reversed at the splitter for the
GPS and differential output ports
going to the 961XD processor.
• For verification and troubleshooting of
the antenna system, see Table 3,
“Troubleshooting the GPS/DGPS
antenna installation,” on page 39.
• The 961XD processor BIOS may be
improperly configured. This normally
wouldn’t occur unless the BIOS mem-
ory battery has failed or the BIOS set-
tings were intentionally changed.
Consult with the Northstar Service
Department for information on how to
troubleshoot and correct this problem.
DGPS
(DIFFERENTIAL) There’s no DGPS indicator on the Chart
screen, and:
The BEACON RX SELF-TEST AND SOFT-
WARE message says
FAILED (p
ress the
STAR key to access the SERVICE MENU
screen, then press the GPS STATUS
key).
• Wait 30 minutes after start-up (only if
a new unit).
• Check for an open or shorted bea-
con-antenna cable connector.
• Check for proper ground.
• The Northstar 8410 ACI or the 961
processor may be defective; call the
Northstar Service Department.
Table 2: Troubleshooting the installation (continued)
Problem Area Symptom Possible Solutions/Reasons