TM 11-5840-217-34-1
6-5. SWEEP WIDTH AND LINEARITY ADJUSTMENT
Adjust SWEEP WIDTH pot R652 and SWEEP LINEARITY capacitor C621 until the sweep extends the full width of
the cathode ray tube.
Note: If these controls are not set properly, the range gate will not sweep the full width in AUTO.
6-6. GATE POSITION ADJUSTMENT
Rotate the RANGE handwheel from minimum to maximum range. The range gate should not move; if it does, adjust
capacitor C604.
6-7. RANGE CALIBRATION
Note: These adjustments require two accurately surveyed targets at ranges of approximately 5, 000 and 1,000
meters.
a. With the target at a range of 1,000 meters gated in the trailing portion of the range gate, adjust TIME DELAY pot
R719 for maximum audio with the RANGE counter indicating the exact range to the target.
b. With the target at a range of 5, 000 meters gated similarly, adjust RANGE-RUNDOWN capacitor C651 for
maximum audio with the RANGE counter indicating the exact range to the target.
Note: These adjustments will interact and will have to be repeated at least three times.
6-8. AUTO RANGE SWEEP AND RANGE ADJUSTMENT
a. Place AUTO-MAN switch S1602 in the AUTO RANGE position.
b. Adjust RANGE ADJ pot R726 so that the range gate starts at the same place when the AUTO-MAN switch is in a
manual position and when the switch is in an automatic position.
c. Adjust AUTO RANGE pot R723 so that the range gate sweeps 900 meters in range.
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