Newtec Proprietary
Confidentiality: Unrestricted
V1.0
277/314
Appendix - Alarm List MDM6000 Satellite Modem
15.6 Demodulator Alarms
Alarms Description
General Demodulator This alarm is raised when there is a general Demodulator
alarm.
This alarm is triggered when of the following alarms
• Demodulator No Lock
• Demodulator LNB Power Control Error
Demodulator Internal Error This alarm is raised when there is a internal error
Demodulator alarm.
Demodulator Input Saturated The demodulator input is saturated.
The L-band input level is too high, this means that the input
level exceeds -10dBm aggregated over L-Band.
Demodulator No PL Lock This alarm indicates that the demodulator cannot lock to the
physical layer headers.
This alarm can occur when the demodulation mode is
incorrect, for example S2 Extensions is selected instead of
DVB-S2. In this case check the demodulation mode.
Demodulator No Lock This alarm is raised when the demodulator cannot lock on the
received carrier.
Demodulator LNB Power
Control Error
This alarm is raised when an error occurs in the LNB power
supply. For example when a short circuit is present on the
connector. Verify the connection to the LNB power supply.
Demodulator decoder
overloaded
This alarm is raised when the decoder is overloaded.
This alarm can be raised when ModCod 64APSK 90/180 is
selected and the symbol rate is set higher than 64Mbaud.
This because this ModCod is limited to 64Mbaud.
To avoid this alarm it is possible to change the ModCod
setting.
Demodulator Buffer Overflow This alarm is raised when an internal buffer overflow is
detected. The baseband frames arriving from three different
demodulator boards are first stored in a buffer. This because
the device processes one baseband frame at a time.
An overflow is detected when the aggregated rate of the three
demodulator boards is too high for the demodulator buffer.
To Next Page
Loading...
