RC4500 Antenna Controller Chapter 4 Software Configuration / Installation
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4.2.5 Verify and Set Limits
At this point in the calibration process, the limits for each axis can be properly verified and adjusted if
necessary. The RC4500 typically interfaces to discrete limit switches (either directly or via AIU interface)
which halt all movement in the related direction.
The RC4500 also includes soft limits that are used as part of the RC4500’s algorithms with automatic
moves, peaking routines, etc. The soft limits don’t actually limit each axis’ travel but are used by software
to determine if a calculated pointing solution is outside the mount’s range of movement.
Elevation Limits
Verify the Elevation Down limit and the Elevation Up limit by manually jogging the antenna (in MANUAL
mode) to each limit. Verify that the RC4500 prevents any movement beyond these limits. When each
limit is activated, the text “DOWN” or “UP” will be displayed to the right of the elevation position.
AZ: 179.97 RF: 50 MANUAL
EL: 85.00 UP SAT:
PL: 30.01 V SPD:FAST UTC
<MODE>MENU <0-9>JOG ANTENNA 14:25:47
Elevation Software Limits
The DOWN and UP elevation limit values in the configuration screen should be set to reflect the physical
limits of elevation travel.
CONFIG-ELEV
DOWN: 5.000 UP: 85.000
PSF:10431 ROFF:-180.000 DIR:0
DOWN LIMIT <-20.000-120.000 DEGREES>
Azimuth Limits
Verify the Azimuth CCW limit and the Azimuth CW limit by manually jogging the antenna (in MANUAL
mode) to each limit. Verify that the RC4500 prevents any movement beyond these limits. When each
limit is activated, the text “CCW” or “CW” will be displayed to the right of the azimuth position.
AZ: 180.02 CW RF: 50 MANUAL
EL: 42.45 SAT:
PL: 30.01 V SPD:FAST UTC
<MODE>MENU <0-9>JOG ANTENNA 14:25:47
Azimuth Software Limits
The CCW and CW azimuth limit values in the configuration screen should be set to reflect the physical
limits of azimuth travel.
CONFIG-AZIM
CCW:-180.000 CW: 180.000
PSF:10431 ROFF:-180.000 DIR:0
CCW LIMIT <+/-300.000 DEGREES>
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