NorthStar Navigation GM1708 961XD User Manual

Page 46

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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

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