Sea Tel ST14, Installation And Maintenance Manual

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ST14 Ku-Band TVRO Setup for Model ST14M
3-9
3.3.11.2. LOW/MID/HI LAT OFFSET (Threshold Offset)
The threshold-offset parameters are an AGC value from 0-255 that is summed to the average noise
floor, to properly calculate the systems tracking signal threshold every time the system is
commanded to Target or Search for a desired satellite.
Example: If the Averaged noise floor is 1100 AGC counts and the Threshold Offset value is 40, the
resultant AGC threshold would be set to 1140 counts, thereby triggering the Tracking status for any
AGC value1141 or higher.
Figure 3-4 Threshold Offset Regions
3.3.11.2.1.
The LOW LAT OFFS parameter defines what threshold offset value parameter is used when
the vessel is located within the Lower Latitude Range.
LOW LAT OFFSET
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 this parameter to memory.
3.3.11.2.2.
The MID LAT OFFS parameter defines what threshold offset value parameter is used when
the vessel is located within the Middle Latitude Range.
MID LAT OFFSET
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 this parameter to memory.
3.3.11.2.3.
The HIGH LAT OFFS parameter defines what threshold offset value parameter is used when
the vessel is located within the Upper Latitude Range.
HIGH LAT OFFSET
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.