Sea Tel ST14, Руководство по установке и обслуживанию

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Setup for Model ST14M ST14 Ku-Band TVRO
3-8
3.3.11.1. Latitude Ranges:
The three latitude ranges in the “LAT-THRESH OFFSET TABLE” are defined by setting
2
system parameters,
“Low Lat Lim” and “High Lat Lim”.
3.3.11.1.1.
The LOW LAT LIM parameter defines
the “Lower” Latitude Limitation Range
and is entered using any whole degree
from 0-90. The LOW LAT LIM
parameter sets the highest latitude
position of the lower latitude range.
Therefore the lower latitude range will
be any latitude range from 0° to LOW
LAT LIM parameter. While in this range,
the system will use the parameter
entered for LOW LAT OFFSET for calculating the tracking threshold
Lower Latitude Range
Example: To define a Lower Latitude Range of 0° to 35°, enter a LOW LAT LIM parameter
value of 35.
1. Press the
NEXT
key to select this sub-menu parameter for adjustment.
2. A cursor will appear under the rightmost digit. Press
▼
&
▲
arrow keys to
increment/decrement this digit.
3. Press the
NEXT
key to move the cursor to the next digit to the left. Press
▼
&
▲
arrow keys to increment/decrement this digit.
4. Press the
NEXT
key to move the cursor to the next digit to the left. Press
▼
&
▲
arrow keys to increment/decrement this digit.
5. Press the SAVE key to save the desired parameter
3.3.11.1.2.
The “Middle” Latitude Limitation Range
is defined by the values set for the LOW
LAT LIM
Middle Latitude Range
and HIGH LAT LIM
parameters. The HIGH LAT LIM
parameter sets the highest latitude
position of the Middle latitude range
while the LOW LAT LIM parameter
entered sets the lowest latitude
position of the Middle latitude range.
Therefore the Middle latitude range will be any latitude position from the LOW LAT LIM
parameter to the HIGH LAT LIM parameter. Example: To define a Middle Latitude range of
35° to 45°, enter a HIGH LAT LIM of 45
and
3.3.11.1.3.
enter a LOW LAT LIM of 35° While in this range
the system will use the parameter entered for MID LAT OFFSET for calculating the tracking
threshold.
The HIGH LAT LIM parameter defines the
“Upper” Latitude Limitation Range and is any
whole degree from1-90. The HIGH LAT LIM
parameter sets the lowest latitude position of
the Upper latitude range. Therefore the upper
latitude range will be any latitude range from
HIGH LAT LIM to 90°. Example: To define an
upper Latitude Range of 45° to 90°, enter a HIGH
LAT LIM of 45. While in this range the system
will use the parameter entered for HIGH LAT
OFFSET for calculating the tracking threshold.
Upper Latitude Range
Figure 3-1 Lower Latitude Range
Figure 3-2 Middle Latitude Range
Figure 3-3 Upper Latitude Range