Operating instructions

User Interfaces DMD20/DMD20 LBST Universal Satellite Modem
4-32 TM103 – Rev. 2.8
RX MINOR (menu)
BUFF UNDERFLOW {Pass/Fail, Unmasked/Masked}
Indicates that a Doppler Buffer underflow has occurred.
BUFF NEAR EMPTY {Pass/Fail, Unmasked/Masked}
Indicates that the Doppler Buffer is about to underflow.
BUFF NEAR FULL {Pass/Fail, Unmasked/Masked}
Indicates that the Doppler Buffer is about to overflow.
BUFF OVERFLOW {Pass/Fail, Unmasked/Masked}
Indicates that a Doppler Buffer overflow has occurred.
RX DATA ACTIVITY {Pass/Fail, Unmasked/Masked}
Indicates that there is no Rx Data activity.
SAT AIS {Pass/Fail, Unmasked/Masked}
Indicates that AIS has been detected in the receive
satellite data stream.
DnI FRAME LOCK {Pass/Fail, Unmasked/Masked}
Indicates if drop/insert data is frame locked.
DnI M-FRAME LOCK {Pass/Fail, Unmasked/Masked}
Indicates if drop/insert data has multiframe lock.
INSERT CRC {Pass/Fail, Unmasked/Masked}
Indicates if the Circular Redundancy Check is passing in
PCM-30C and PCM-31C Modes.
T1/E1 SIGNALING {Pass/Fail, Unmasked/Masked}
The interface is unable to find the expected signaling
information.
IFEC LOCK {Pass/Fail, Unmasked/Masked}
Indicates that the Framing Unit is unable to find the
expected framing pattern.
OFEC LOCK {Pass/Fail, Unmasked/Masked}
Indicates that the Reed-Solomon Decoder is not locked.
INTERLEAVER {Pass/Fail, Unmasked/Masked}
Indicates that the Reed Solomon Interleaver is not
synchronized.
RS UNCORR WORD {Pass/Fail, Unmasked/Masked}
Indicates status of the Reed Solomon uncoded word
fault.
TPC IFEC LOCK {Pass/Fail, Unmasked/Masked}
Indicates that the Framing Unit is unable to find the
expected framing pattern.
EBNO (dB) {Pass/Fail, Unmasked/Masked}
Indicates that the Eb/No are outside of limits.