Figure 3-1.-Azimuth scan coverage.
the antenna scan to be 360 degrees during dual system
operation. The antenna scan will be 240 degrees
during single system operation. In the SECTOR posi-
tion, the antennas will scan 45 (±4) degree sectors.
This sector will center around the position established
by the ANT HEADING control. With STOP selected,
C-7511A/APS-115 Radar Antenna Control
Panel
The C-7511A/APS-115 (fig. 3-2) controls both of
the radar antennas. There are six controls available to
the operator for getting the presentation desired.
TILT KNOB.— This knob gives the operator the
ability to vary the tilt of the antenna manually. The
range of manual tilt is from +10 degrees to –20
degrees from aircraft horizontal.
NORTH STAB/HEADING STAB PUSH
BUTTON.— With NORTH STAB selected (illumi-
nated amber), the presentation displayed will be north
stabilized. 000° displayed will be true north. With
HEADING STAB selected (illuminated amber), the
presentation will be heading stabilized. 000°
displayed will be aircraft heading. Pressing the push
button will alternately select NORTH or HEADING.
STAB/OUT SWITCH.— With STAB selected,
the antennas will automatically correct for aircraft
pitch and roll attitude changes. Mechanical limit for
antenna stabilization is ±30 degrees, with respect to
the aircraft. With OUT selected, the antenna
stabilization is disabled.
SCAN SWITCH.— There are three selections
possible to the operator. The FULL selection causes
Figure 3-2.-C-7511A/APS-115 radar antenna control panel.
3-2
