ViaSat SurfBeam, Руководство по установке и настройке

Страница: 17 / 30

SurfBeam Satellite Modem Installation and Configuration Guide
Rev. B VSD-200292-02-085
2-5
Table 2-1 Configuration Commands and Parameters
Command Parameter Purpose
1
downstream-
frequency
Downstream Frequency
Value in Hz
Specifies the downstream frequency used by the
SM to receive traffic.
upstream-search Frequency Search Offset
(F
MAX
)
The maximum offset frequency in Hz, from
nominal frequency, that the SM will use in its
search for upstream lock.
Number of Frequency
Search Steps (F
N
)
The total number of frequency appraisals to be
made over ± F
MAX
range.
Max. Power in dBm (P
MAX
)
The highest power to be used in the upstream
search, in dBm (This is not necessarily equal to
the highest possible SM power output).
Min. Power in dBm (P
MIN
)
The lowest power to be used in the upstream
search, in dBm (This is not necessarily equal to
the lowest possible SM power output).
Number of Power Search
Steps (P
N
)
The total number of power levels to be appraised
between P
MIN
and P
MAX
during upstream search.
1 Figure 2-3 shows the search pattern based on the parameter values entered at the command line interface.
Figure 2-3 Upstream Frequency/Power Search Pattern
6
Frequency
Power
1
2
3
4
5
7
8
P
MIN
P
MAX
F
MAX
9
START
10
11
12...
Start at nominal upstream
frequency, and minimum power
(as specified by CLI entry)
P
N
(Number of Power Steps)
F
N
(Number of Frequency Steps)