Operating instructions

User Interfaces DMD20/DMD20 LBST Universal Satellite Modem
4-30 TM103 – Rev. 2.8
FORCED ALARM {DISABLED, ENABLED}
Allows user to disable or enable forcing of a Tx
Summary Alarm.
TX MINOR (menu)
TERR CLK ACT {Pass/Fail, Unmasked/Masked}
Indicates no Terrestrial Clock activity.
TERR DATA ACT {Pass/Fail, Unmasked/Masked}
Indicates no Tx Data activity.
TX TERR AIS {Pass/Fail, Unmasked/Masked}
Indicates that AIS has been detected in the Tx Data
Stream.
DnI FRAME LOCK {Pass/Fail, Unmasked/Masked}
Indicates the framing unit is unable to find the expected
terrestrial framing pattern.
DnI M-FRAME LOCK {Pass/Fail, Unmasked/Masked}
Indicates the framing unit is unable to find the expected
inter-frame pattern.
DROP CRC {Pass/Fail, Unmasked/Masked}
Indicates if the Circular Redundancy Check is passing in
PCM-30C and PCM-31C Modes
TX DVB FRM LOCK {Pass/Fail, Unmasked/Masked}
Indicates that Tx input data stream framing does not
match the user selected TX TERR FRAMING.
TX CLK SRC FALLBK {Pass/Fail, Unmasked/Masked}
Indicates that the clock resource has fallen.
BUC PLL {Pass/Fail, Unmasked/Masked}
Indicates BUC PLL has failed. (Only available when FSK
is enabled)
BUC OVER TEMP {Pass/Fail, Unmasked/Masked}
Indicates that the temperature of the BUC is
overtemperature. (Only available when FSK is enabled)
BUC SUMMARY {Pass/Fail, Unmasked/Masked}
Indicates summary alarm. (Only available when FSK is
enabled)
BUC OUTPUT {Pass/Fail, Unmasked/Masked}
Indicates that there is no output from the BUC. (Only
available when FSK is enabled)
FSK COMMS {Pass/Fail, Unmasked/Masked}
Indicates that the modem has lost communications with
the BUC