SeaSpace TeraScan 1.5M, Operation And Maintenance Manual

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TeraScan 1.5m Polar Satellite Tracking Antenna O & M Manual
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Constants Settings Detail - Conscan Tracking only
There are 17 integer constants. -1 is the default value. The following list is for a two- or three-axis, program, or
conscan track antenna.
T
ABLE
10-2:
Constants Settings
Number Units Description
0 - Azimuth/cross-level sensitivity for conscan tracking. A larger value makes
conscan less sensitive to errors in signal strength. Values are usually 2 or 3.
Range is 0 to 4. 0 is extremely sensitive.
1 - Elevation sensitivity for conscan tracking. Values are usually 2 or 3. Range is
0 to 4. 0 is extremely sensitive.
2 counts Number of counts above background level to qualify as "signal has been
found". Use search mode if signal is below this level. [100]
Example:
background = 1210 counts
constants [2] = 100 counts
conscan tracking occurs when the signal strength is greater than 1210 + 100 =
1310 counts.
3
4
5 - =-1: Do not flip antenna. [*]
= 1: Flip the antenna’s elevation. Use for testing only.
6
7 seconds DSN: Number of seconds to acquire a signal before lock is recognized. [30]
=-1: Do not perform DSN processing.
8 seconds DSN: Time to wait after the signal is lost before going to search mode. Remain
in program track during this time.
=-1: No wait before going into search mode. [120]
9 seconds Delay in seconds to wait after changing feed polarity.
=-1: Do not wait. Do not use a value of -1 if feed polarity is being changed at the
start of a pass.
10 - =2: Two-axes reporting (azimuth and elevation) [*]
=3: Three-axes reporting (azimuth, elevation, and cross-level)
11 - =-1: Turn conscan motor on at the start of the pass and off when the pass is
complete.
= 0: Do not turn conscan motor on or off.
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