Transmit Warnings; Receive Faults - Teledyne QMultiFlex-400 Installation And Operating Handbook

QMultiFlex-400™ Installation and Operating Handbook

11.2 Transmit Warnings

Fault Text
Tx warning: Cannot
hold/reach power set at
BUC
Tx warning: Carrier out of
range.
Tx warning: Tx symbol
rate outside range.

11.3 Receive Faults

Fault Text
Rx fault: Demodulator
unlocked. Check modem
settings.
Rx fault: FEC Decoder
synchronization lost.
Rx fault: Rx channel DPLL
unlocked.
Rx fault: Rx terrestrial
DPLL unlocked.
Rx fault: Physical layer
sync lost.
Rx fault: PCMA unlocked.
Rx fault: No GPS data,
check connection.
Rx fault: Terrestrial muted
due to sync loss.
Rx fault: Baseband sync
lost.
Rx fault: No transport
traffic.
Rx fault: Baseband CRC
error.
Notes
The required BUC output power cannot be
achieved. This alarm is only displayed when the
modem is in terminal mode & the modem attempts
to set the BUC output power by adjusting its output
level & a attenuator in the BUC. This can be caused
by too much attenuation in the cross-site cabling or
inability to control the attenuator in the BUC (such
as use of a non-Paradise BUC with no input
attenuator)
The carrier frequency selected for the Tx carrier
has exceeded the permissible range for the
configured symbol rate.
The modems current configuration exceeds the
permissible symbol rate, check the configuration.
Notes
The demodulator cannot find a carrier to lock to at the
specified frequency. Check the frequency, data rate
and FEC settings. Check the demodulator by enabling
IF loopback test mode.
Synchronisation has been lost in the FEC decoder.
Check inner FEC configuration.
Consult technical support if this alarm cannot be
cleared.
Consult technical support if this alarm cannot be
cleared.
DVB-S2 demodulator cannot detect valid DVB-S2
satellite frames (no data detected).
Consult troubleshooting section of Paired Carrier quick
start guide for list of potential causes.
GPS input to Paired Carrier (for calculating the delay to
satellite) has failed. Check status of, and cable to, the
external GPS system.
This is as a result of setting the modem to mute
terrestrial data on an Rx loss of sync (where the data is
unmuted when the Eb/no threshold is exceeded). This
is used to counter an excessive number of log entries
due to sun outages (scintillations) causing the demod
to continuously go into and out of lock.
This is a DVB-S2 error when valid DVB-S2 baseband
frames are not detected in the DVB-S2 satellite frames.
This could be due to corruption due to interference,
poor signal, etc.
This is a DVB-S2 alarm indicating that no valid MPEG2
transport stream packets were detected within the
received DVB-S2 satellite frame.
The received DVB-S2 satellite frame does not contain
a valid baseband frame, indicating the data has
become corrupted (poor signal, interference, etc).
Relays To Ter
D
11-2
To
Other
Sat
CM
CM
To
Relays To Ter Other
Sat
R TA,TC SB RF
R TA,TC SB RF
D
D