b. Set the following switches to CAL in the order given:
(1) X-Y-RHO switch S803.
(2) EL RSVR switch S1601.
d. Loosen the locknuts on R1121 and R 10Z.
e. Alternately adjust R1102 and R1121 until a null of less than 25 millivolts peak-to-peak is observed on the
f. Tighten the locknuts on R1102 and R 121 and recheck the null.
g. Return S1601 and S803 to the OPR position.
7-11. MAP SCALE ALINEMENT
a. Set MAP SCALE switch S1401 to the 1:25K position.
b. Turn the RANGE handwheel for a reading of 5, 000 meters on the RANGE counter.
c. Turn MAP ZERO switch S1605 to 0 (toward plotting table).
d. Turn the MAP SCALE switch to the 1:50K position. Range counter M1402 (1:50K) should read 10,000 meters + 5
e. If M1402 reads less than 9, 995 meters or more than 10, 005 meters, align the RANGE counters.
f. Return S1605 to its original position.
g. Set the ELEVATION counter to 0 and the MAP SCALE switch to 1:25K; turn the RANGE handwheel for a RANGE
counter reading of 14, 000 meters.
h. Place MAP SCALE switch S1401 to the 1:50K position.
i. Loosen the locknut on SCALE ADJ pot R1409 and adjust R1409 so that 1:50K counter M1402 reads 14, 000
j. Tighten the locknut and recheck the counter reading.
7-12. AZIMUTH RESOLVER AND COUNTER ALINEMENT
b. Rotate the ELEVATION handwheel so that the ELEVATION counter reads 0.
c. Rotate the RANGE handwheel to obtain a reading of 1,400 meters on the RANGE counter.
d. Rotate the AZIMUTH handwheel to obtain a reading of 1, 600 mils on the AZIMUTH counter.
e. Loosen the four mounting screws that secure resolver B1302 to the azimuth assembly.