out becomes.
See the “Getting started” section
for setup of other types of motor /
gear systems like prop pitch rotators or MT’000 series elevation mechanisms.
P3
=
‘0’
This is ‘NORTH STOP‘. North is 0.0 or 360 degrees. To set up for south or 180
degree stop, push CW / UP button till display reads ‘180’. Your CW default limit would
read L194 and the CCW limit would be L166. Any ‘STOP’ direction can be put in and
would change your CW and CCW limit readings accordingly. Not used for elevation
mechanisms.
P2
=
‘L14’
This is the CW limit that matches the physical limit switches inside the OR-
2800. The L14 would change automatically to ‘L194’ if you had set your RC-2800PX up
for SOUTH stop. See “Getting Started” section for MT’000 elevation mechanisms.
P1
=
‘14’
This is the CCW limit that matches the physical limit switches inside the OR-
2800. The ‘14’ would change automatically to ‘166’ if you had set your RC-2800PX for
SOUTH stop in P3. In actual operation, as your rotate CCW below 00.0 degrees or below
180.0 degrees, the display will show an ‘L’ before the true heading. When you turn the
unit on after a few days or even a few hours it is helpful to know you are in a limit zone
and can’t go much further in that direction. See “Getting Started” section for MT’000 ele-
vation mechanisms.
TO CALIBRATE YOUR OR-2800 CORRECTLY:
Push and hold in the UPPER mode button. “P20 0.0” should come up. Bump the
LOWER mode button SEVEN (7) times until you see “P0 CAL” Push in the LOWER
mode button and you will see the SEGMENTS of the digit to the left of the “C” start to ro-
tate counterclockwise at the same time the rotator is moving Counterclockwise (CCW).
Release the LOWER mode button and the rotator will continue going CCW by itself at
half speed. Soon the rotator will stop and the display will change to read “0 9 L346”. The
rotator and the control box are now IN SYNC and
CALIBRATED. THIS PROCEDURE CAN BE REPEATED ANYTIME IF YOUR CALIBRA-
TION IS LOST, CHANGED OR SUSPECT. It can also be done remotely from a com-
puter. Normally, the only thing that can keep your RC-2800PX from displaying the correct
heading is IF your mast or antenna has slipped.
Now push the CW button and rotate the OR-2800 until the display reads TRUE NORTH
(0.00) or close. The “antenna system” should be pointed at TRUE NORTH and clamped
using the OR-2800 mast clamps.
YOU ARE NOW CALIBRATED
TO CALIBRATE YOUR MT1000, MT3000 OR MT5000 CORRECTLY: This part as-
sumes you have already set P4 to the proper gear ratio for your unit.
Press and hold the upper mode button until P20 appears. Bump the Lower mode button
once down to P6. Your 00.0 degrees of elevation can be set anywhere on the MT1000
since it can rotate continuously through 360 degrees. Run the display count down to 0.1
and save by pressing and holding the lower mode button until 0 9 00.0 appears. The
speed digit may be different.
MT3000 and MT5000 units typically set the array at 0 degrees as the array is “looking at”
the motor. This is very near one end of the chain on the D ring. Again in mode P6, use
the UP / DOWN buttons to set the display to 00.1 and save by pressing and holding the
lower mode button until 0 9 00.0 appears. The speed digit may be different.
8
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