Interpreting The Matrices; Ibs Fault Conditions And Actions - Radyne DMD2401 LB Installation And Operation Manual

Maintenance

6.3.1 Interpreting the Matrices

The first vertical column in the Tables represents the various Faults that the modem may
identify. The top horizontal column indicates the various actions that the modem will undertake.
These actions may be in the form of a relay, a switch or an LED.

6.3.2 IBS Fault Conditions and Actions

Figure 6-7 and Table 6-4 illustrate the IBS Fault Conditions and Actions to be taken at the Earth
Station, at the Terrestrial Data Stream, and the Satellite. These faults include those detected on
the Terrestrial link and those detected from the satellite.
Table 6-4. IBS Fault Conditions and Actions (includes Drop and Insert)
Fault Detected on
Terrestrial Link
(Across Interface A)
FA1 - Loss of
Terrestrial Input
FA2 - Loss of
Terrestrial Signaling
FA3 - Loss of
Terrestrial Frame
FA4 - Loss of
Terrestrial Multiframe
-3
FA5 - BER of 1x 10
6-4
DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
Figure 6-7. IBS Alarm Concept
Action In Earth
Station
AS1, 2 - IBS Prompt,
Service Alarm
AS1 - - IBS Prompt
Alarm
AS1 - - IBS Prompt
Alarm
AS1 - IBS Prompt
Alarm
AS1 - IBS Prompt
Action to Terrestrial
(Across Interface H)
AH2 - '1' in Bit 3 of
NFAS TSO, Yellow
Alarm
AH2 - '1' in Bit 3 of
NFAS TSO, Yellow
Alarm
AH2 - '1' in Bit 3 of
NFAS TSO, Yellow
Alarm
AH2 - '1' in Bit 3 of
NFAS TSO, Yellow
Alarm
AH2 - '1' in Bit 3 of
Action to Satellite
(Across Interface D)
AD1 - AIS in
Relevant TS's
AD3 - '1111' in
RelevantTS16's
AD1 - AIS in
Relevant TS's
AD3 - '1111' in
Relevant TS16's
AD1 - AIS in
TM075 – Rev. 1.3