Modem
Reference Manual for EL470 IP Satellite Modem
Command
IfOutputClock
Output clock selection Output clock sel.
Location /Modem/Control/Demodulation
Description
Configuration of the clock for the data output at the interface. This is also
the output clock for the de-framer buffer.
Selections:
• The satellite received clock.
• An externally provided clock at interface rate.
• An internally generated clock.Remark: If the satellite or the external
clock is not valid or present when selected then the controller falls
automatically back to the internal clock. On the remote side, normal
operation mode is to select the satellite receive clock. Then the
interface clock is adjusted via a clock recovery loop to match the
satellite clock. When the internal clock is selected as interface clock,
then the fixed fall back clock is used for data output.
RMCP
Command
RIc Access Normal user : RW
Expert user : RW
SNMP Table ntcDevsMod01InterfaceEntry
Command ntcDevsMod01IfOutputClock
OID 1.3.6.1.4.1.5835.3.1.4.1.38.1.1
Values Factory Default
satellite
Enumeration Value
Internal
Satellite
External
External G703 1
External G703 2
External HSSI
G703 155 Mbit/s
MMF
SMF
3
4
6
7
8
9
10
11
12
Command
DmExcBW
Roll-off factor Roll-off factor
Location /Modem/Control/Demodulation
Description
Configuration of the matched filter excess bandwidth. In auto mode, 35%
is selected for DVB-QPSK modes and 25% for 8PSK and 16QAM
according to the DVB standard. Selecting 25% manually in QPSK will
result in some bandwidth saving and will not result in any significant BER
performance degradation (0.1 - 0.2 dB).
RMCP
Command
RFr Access Normal user : RW
Expert user : RW
SNMP Table ntcDevsMod01DemodulatorEntry
Command ntcDevsMod01DmExcBW
OID 1.3.6.1.4.1.5835.3.1.13.1.8.1.1
Values Factory Default
x25RCRO
Enumeration Value
Auto
35%
25%
0
1
2
version 3.1
106
SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
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