User's Guide

DRAFT
Page 3-9
17 Mar 2016
23-15-87
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-500 SDU and SCM
© Honeywell International Inc. Do not copy without express permission of Honeywell.
D. PIM Test Results
Table 3-4 displays possible PIMBIT status messages. The status messages are displayed on the
INTERMOD page.
Table 3-4. PIM Test Conditions
Test Status Description Action
READY Conditions necessary to perform test
are present, no test is in progress and
no test has been run to completion.
No action required.
IN PROGRESS Test is in progress. No action required.
PASS Test has completed successfully and
passed the ORT specified criteria.
No action required.
FAIL Test has completed but does not
meet pass with the ORT specified
criteria.
See "PIM Test Overall Status" on
page 3-10.
SUSPECT Test results are suspect (possible
causes are: unstable noise,
mismatched test frequencies).
Repeat the test.
HSR NOT READY High stability oscillator is warming. Wait for the status to change to
READY.
NAV DATA UNAVAIL Test cannot be executed as
navigation information is not present.
SDU is in safe mode. Navigation
data must be provided in order for
the SATCOM system to work,
including PIMBIT. Ensure the SDU
can receive navigation data. Wait for
the status to change to READY and
repeat the test.
ANT NOT READY Test cannot be executed as
communication with Antenna has not
been established. This could indicate
an Antenna or D/LNA fault.
Problem with the antenna. PIMBIT
cannot be executed until
communication with the antenna is
established. Check the cable
connections of the SDU and the
antenna and check the antenna
status. "BITE" on page 4-6. Once the
connection has been established,
wait for PIMBIT status to change to
READY and run PIMBIT.
SDU FAULT Self test has found internal SDU fault. Check BITE status. See "BITE" on
page 4-6.
TEST FREQ UNAVAIL No test frequencies less than 168
hours old available for a viable
satellite.
Log on to an I-4satellite to obtain test
frequencies from the SBB bulletin.
Log off, ensure the status changes to
READY and run PIMBIT.
DRAFT as of
4 Mar 2016