NorthStar 958 Operator's Manual page 187

958 serial number
958 software
version
Beacon receiver
software version
Beacon receiver
self-test
958 Operator's Manual, Rev. A
The serial number is located in the SERIAL NUMBER field (and
on the back of the 958).
The current version of the 958's operating software is located
in the SOFTWARE VERSION field.
If your 958 is connected to an optional Northstar radiobeacon
receiver, its software version will be displayed in this field.
If your 958 is connected to an optional Northstar radiobeacon
receiver, the receiver is automatically tested each time the 958
powers up. If all test parameters are met, the message PASSED
is displayed in the BEACON RCVR SELF TEST field. If the
differential receiver fails any of the test criteria, the 958
displays the message FAILED. In many cases, the failure is
caused by an open or shorted antenna cable, which can be
repaired in the field. If this isn't the source of the failure, you
may have to return the 958 to the factory for service.
Chapter 12 - Setting Up Your 958
Page 179