Paradise P300 specifications Cm, Tf

Text on Display

Tx Fault: CRC sync lost on Tx input

Tx Fault: Dropped data is all ones (AIS)

Tx Fault: Input BER > 1E-3, [AIS forced]

Tx Fault: Clock loop fail, Tx muted

Tx Fault: BUC DC current outside limits

Tx Fault: BUC current/connection fault

Description / Cause / Notes

The modem only seeks Cyclic Redundancy Code (CRC) sync when the Tx baseband is set to use the Drop mux in G.732 mode (or 2048k IBS G.732 0% overhead mode) and when set by the user to process CRC’s (Change, User-Opt, Operation, Terrestrial, PCM Bearer CRC, Process). If CRC sync is permanently lost, check if a CRC is present on the PCM signal.

The specific timeslots dropped by the Drop Mux contain all ones (AIS). This is different to the “Tx Fault: Data input is all ones (AIS)” message described earlier which refers to the whole PCM bearer being AIS. In the case it is only the specific timeslots which contain AIS. This is normally used to indicate an upstream equipment fault, it is not a modem fault. See note 4

The Bit Error Rate at the Tx input (measured on the PCM Frame Alignment Words) is worse than 1x10-3. This can only be due to a very poor error rate on the PCM input signal. “[AIS Forced]” is only shown if the user option of what action to take when the BER is bad is not set to Ignore (Change, User-Opt, Operation, Actions, BER Action). The fault is always displayed, although the actions can be cancelled by selecting Ignore. Check the line code setting (AMI/B8ZS/HDB3) matches the input signal on any G.703 cards in use (see note 3).

The Tx clock generation loop, which generates the timing over the satellite link has failed and the Tx carrier is muted as a result. If the Tx Clocking (Change, Tx, Clocking) is set to “Tx Clock In”, then check the Tx Clock frequency matches the data rate (Change, Tx, Baseband, Continuous).

The Modem is configured to operate with a BUC and the operator has activated the BUC current monitor, but the current drawn by the BUC is outside the low/high window set. View the current drawn and alarm settings with Monitor, BUC, change with Change, BUC/LNB, Tx/BUC, Current Monitor

The Modem is configured to operate with a BUC and the modems DC supply to the BUC has been activated, but the DC switch indicates either an open or short circuit.

Relays

T

T

Opt

T

T

T

T

To Terr

TB

Opt

TBOpt

To Sat

SA

Opt

SAOpt

CM !

Other

CM, TF

P300H P300 Series Installation and Operating Handbook Page 218