Operation and Maintenance Manual

2.4 Front Panel Display
Azimuth and Elevation angles are displayed on the front panel using 8-
character LED displays. Six of the characters provide the angle reading to a
precision of 0.001 degree. The 7th character is for the sign of the angle, and
the 8th character provides limit information.
A rapidly blinking display (4-Hz) indicates that the axis has not completed its
calibration cycle.
A slowly blinking display (2-Hz), along with a letter in the limit character,
indicates that a limit switch has been tripped, stopping the positioner motion.
Motion is then permitted only in the direction away from the limit.
L (left) indicates CCW azimuth limit (decreasing angle).
R (right) indicates CW azimuth limit (increasing angle).
U (up) indicates CW elevation limit, and D (down) indicates CCW
elevation limit.
A slowly blinking letter in the limit character, with the rest of the display not
blinking, indicates that the positioner has reached the software limit maximum
or minimum angle. These limit angles may be adjusted by commands over
the serial communication link.
The angle display may be changed by commands CCA and CCE on the serial
communications link. The precision may be set to 0.1, 0.01, or 0.001 degree.
The format may be set to 0-359.999 or +/-780 degrees. If desired, the limit
character may be displayed (without blinking) to indicate cable wrap (when
the angle is outside the center +/-180 degree area). This cable wrap feature is
particularly useful with a 0-359.999 degree display format.