Sailor Inmarsat B, Workshop Manual

Page: 96 / 134

6 SERVICE INTERFACE Inmarsat B
Position is missing
The position has never been entered manually or has been lost from the NMEA position input.
Region is invalid
The current position indicates that the satellite of the current ocean region is below the horizon.
Voice communication in progress
A voice call is currently in progress.
FAX communication in progress
A FAX call is currently in progress.
Data communication in progress
A data call is currently in progress.
TELEX communication in progress
A TELEX call is currently in progress.
6.27 SU
Shows the ratio between valid and invalid received signal units.
Syntax SU
6.27.1 SU
Shows the ratio between signal units received with valid and invalid cyclic redundancy check (CRC). The
value is the result of the latest 100 signal units received.
6.28 TEST
Executes the self-test.
Syntax TEST [WARN]
TEST sequence [WARN]
TEST LIST
TEST number
TEST CLEAR
The self-test is built around a series of primitive tests each associated with a limited part of the equipment.
Each of these tests is described below.
Sequences of tests are used to test major equipment blocks such as the entire ADE.
All tests are non-destructive, i.e. the self-test may be executed at any time without affecting system
performance.
Each of the tests results in a test code. Basically, three types are used: passed, warning, and failed.
Passed and failed are unique codes whereas warnings are a little more elaborate:
1 - OK
The test has passed.
2 - FAILED
The test has failed.
3 - target not found
Warning indicating that the item to be tested is missing. This has been detected by
a previous test in a sequence.
9905 PAGE 6-20