NorthStar Navigation GM1708 961XD - Manual (Page 68)

SECTION FOUR - Service/Maintenance
Page 58 961 INSTALLATION MANUAL Revision A
Processor serial number and software revision
The serial number of the processor is affixed to the back of the unit, and
also has been permanently programmed into the unit’s database. You can
view this serial number at the PRODUCT INFORMATION screen in the
PROCESSOR SN/REV
field.
Serial numbers ending with the letter D indicate that the unit contains an
internal DGPS differential receiver.
Beacon receiver self-test and software revision
The 961 automatically self-tests the internal beacon receiver, if installed,
each time you power-up the unit. The BCN RCVR ST/ REV field displays
the software version used by your 961’s DGPS receiver (if installed), as
well as the self-test message PASS or FAIL. If all test parameters are met,
the field says PASS. If the differential receiver fails any of the test criteria,
the field says FAIL. If the field says FAIL, the 961 won’t be receiving DGPS
signals; for details about troubleshooting the DGPS receiver, see ”Testing
and troubleshooting the 961” beginning on page 32. In many cases, the
reason for the failure is an open or shorted antenna cable, which can be
repaired in the field. If this isn’t the source of the failure, call the North-
star Service Department for further instructions.
If a beacon receiver isn’t installed, this field is blank.
GPS receiver self-test and software revision
The GPS RCVR ST/REV field displays the software version used by your
961’s GPS receiver, as well as the self-test message PASS or FAILED. This
field should read PASS, not FAIL. If the 961 displays the message FAIL,
return the 961 to Northstar for service.
Configuring the
receivers
The 961’s RECEIVER INFORMATION screen provides you with access to
several of the 961’s GPS and DGPS (if installed) receiver functions. To dis-
play these functions, press the STAR key until you reach the SERVICE
MENU
screen, then press the RECEIVER SETUP key.