Move the DETENT switch to OFF and place the ∆ RANGE and A AZIMUTH controls in detent.
d. Check the RADAR HEIGHT counter by rotating its adjustment screw; note that the counter reading changes.
The weapon HEIGHT counter reading should change by the same amount.
e. Check the weapon HEIGHT counter by rotating the control knob; note that the reading changes on the
weapon HEIGHT counter only.
Check the RADAR LOCATION and WEAPON LOCATION counters as follows:
Hold the RADAR LOCATION EASTING switch in the SUBT position; both EASTING counter readings
Hold the RADAR LOCATION EAS'ING switch in the ADD position; both EASTING counter readings
Repeat the steps in (1) and (2) above with the RADAR LOCATION NORTHING switch and counters.
Check the accuracy of the azimuth counter movement as follows:
Note the reading on the azimuth counter on the frame of the radar. Use the LOWER BEAM AZIMUTH
control to set the same reading into the computer AZIMUTH counter.
Open the computer drawer far enough to open the computer drawer interlock.
Rotate the antenna approximately 1, 500 mils.
Close the computer drawer.
When the AZIMUTH counter on the computer stops, compare the reading with the reading on the
counter on the radar frame. The readings should agree within 1 mil.
Repeat the steps in (1) through (5) above at two additional positions of the antenna.
h. Check the ∆ TIME counter by rotating its control knob clockwise to increase its reading and counterclockwise
to decrease its reading.
Check the accuracy of the computer (after all components of the computer have been checked).
The accuracy check for dual beam operation consists of a series of four problems (fig 1), which are set
into the computer. These problems produce weapon locations which are compared against a set of