TM 11-5840-281-12-1
4-28. CIRCUIT ALINEMENT. (CONT)
2.
On control-indicator, turn VIDEO GAIN control fully counterclockwise.
3.
On control-indicator, adjust VERT and HORIZ PPI CENTERING controls to center start of ppi sweep on display.
4.
On range mark generator card, adjust R41 10-MILE AMPL control for optimum 10-mile range mark intensity.
5.
Loosen two front panel captive head screws on pulse generator and pull pulse generator out of control-indicator
to expose top deck controls and circuit cards.
6.
On top deck of pulse generator, adjust PPI DELAY control until initial range mark (touchdown range mark) is just
visible at start of sweep.
7.
On pulse generator, place RANGE MILES switch to 20 position.
8.
On sweep generator card in pulse generator, adjust R22 PPI SWEEP EXP control to position 20-mile range mark
1/8 inch from edge of display.
9.
On pulse generator, place RANGE MILES switch to 40 position.
10.
On sweep generator card in pulse generator, adjust R4503 SWEEP GATE LENGTH control so sweep length just
passes 40-mile range mark.
11.
On pulse generator, place RANGE MILES switch alternately to 40, 20, 10, and 5 positions. Verify that sweep
length extends across the radius of the crt in all ranges. If sweep length is short in any range, readjust R4503
SWEEP GATE LENGTH to obtain proper sweep length in that range.
NOTE
If associated IFF equipment is being used, perform steps 12 thru 14 below. If not, proceed
to step 15.
12.
On pulse generator, place RANGE MILES switch to 80 position.
13.
On range mark generator card, readjust R41 10 MILE AMPL control for optimum 10-mile range mark intensity.
14.
Unlatch four latch locks securing rear cover of control-indicator and remove cover.
15.
On mixer amplifier, adjust R41 IFF VIDEO for optimum operating level.
16.
On pulse generator, place RANGE MILES switch to 10 position.
17.
On range mark generator card in pulse generator, adjust R23 5 MILE AMPL control for optimum 5-mile range
mark intensity.
18.
On range mark generator card in pulse generator, adjust R41 1 MILE AMPL control for optimum 1-mile range
mark intensity.
19.
Push pulse generator into control-indicator and secure with two captive head screws on front panel of pulse
generator.
4-101
Previous Page
