Module 2

Question 1

Describe the purpose of elevation control in a RADAR stabilization circuit

Answer 1

To keep the beam from the RADAR antenna pointed at the horizon on the pitch axis

Question 2

The elevation axis must react to a deflection of the aircraft in the ROLL axis as to the ______ of the azimuth angle

Answer 2

Sine

Question 3

The elevation axis must react to a deflection of the aircraft in the PITCH axis as to the ______ of the azimuth angle

Answer 3

Co sine

Question 4

The roll axis circuit for the L1011 Radar feeds the Roll pick-off to what part?

Answer 4

The Antenna Roll Synchro

Question 5

The roll stabilization is inoperative. What would the return on the display look like?

Answer 5

Only returns in the center and both left and right are lost

Question 6

If the roll axis is OVER STABILIZED on a right turn, what does the return look like?

Answer 6

Excessive on the left, but normal on the right

Question 7

If the roll axis is UNDER STABILIZED on a right turn, what does the return look like?

Answer 7

Excessive on the right, but normal on the left

Question 8

A standard synchro transmitter X winding with ref. to the Y winding would be similar to

Answer 8

The output from a standard AC gyro pickup

Question 9

Varying the AC variable signal (lead/lag) compared to the AC reference signal can have what effect on the motor?

Answer 9

The motor direction can be changed

Question 10

In the Elevation axis circuit for the L1011 RADAR, the Pilot input for antenna pitch is fed to the________

Answer 10

Tilt Synchro

Question 11

Weather RADAR schematic: What do the 4 transistors (Q2102 thru 2105) represent?

Answer 11

The servo amplifier

Question 12

Weather RADAR schematic: What do the 2 amplifiers (I2102A and I2102B) represent?

Answer 12

Comparison and Pre amp

Question 13

Weather RADAR schematic: What does the potentiometer R2122 represent?

Answer 13

Elevation Position Feedback