Radar Air-to-Air Bits

BIT 0 Aim Dot and Range Rate Calibration

Step	System	Action
1.	Radar Power Knob	STBY
2.	DSCG Mode Knob	RDR BIT
	a. Test Grid	Aligned ±1/16 inches
3.	Test Knob	DOT BAL and HOLD
	a. Aim Dot	Centered
	b. Range Rate	±20 knots
4.	Radar Power Knob	TEST
5.	Test Knob	DOT BAL and HOLD
	a. Aim Dot	In Calibration Area
	b. Range Rate	900 ±50 knots
6.	Adjust Horizon Line	Zero Pitch
7.	Radar Range Knob	AI 10
8.	DSCG Mode Knob	DSCG TEST
	a. Search Display	Eight Shades of Gray
	b. Adjust BRT	Optimal
	c. Adjust CONTR	Optimal
9.	DSCG Mode Knob	RDR BIT
10.	Radar Range Knob	AI 25
11.	Position EL Strobe	30° Down
	(Prevents radar antenna from hitting stops)
12.	Stab Switch	OUT
	a. Horizon Line	Removed
13.	Stab Switch	NOR
14.	Radar Power Knob	STBY

manual_radar_air_to_air_bit_0

Step	System	Action
1.	Test knob	Set 1
2.	Radar power knob	TEST
	a. Monitor meter (RDR MAG)	Indicates 1.4 to 1.8.
	b. Horizon line	Within limit markers as shown.
3.	Adjust indicators	For optimum contrast (CONTR) and brightness (BRT).
	a. Minimum targets	11 targets visible in search.
	b. Position range knob	To 5, 10, 50, 100, 200, and 25 while checking video.
4.	Place acquisition symbol beyond the last target.
5.	Move range strobe down while holding full action.
	a. Range strobe locks on before passing seven targets.
	b. Maintain lockon for 5 seconds.
6.	Test knob	Set 0
	a. System unlocks in 4 to 6 seconds.
7.	Test knob	Set 1
8.	Pulse switch	SHORT
	a. Monitor meter (RDR MAG)	Indicates 0.9 to 1.15.
	b. Minimum targets	Eight targets visible in search.
9.	Place acquisition symbol beyond the last target.
10.	Move range strobe down while holding full action.
	a. Range strobe locks on before passing eight targets.
	b. Maintain lockon for 5 seconds.
11.	Test knob	0 for 3 seconds then select TEST 1
	a. System goes into memory for 3 seconds, then re-acquires lockon.
	b. Range rate readout flashes at 4 HZ for 3 seconds.
12.	(P) Radar missile power	STBY FOR 1 MINUTE
13.	(P) Radar missile power	CW ON
	a. RDR light	ON STEADY 1 MINUTE
14.	Meter selector	KLY
	a. Meter reads	0.25 to 1.25
15.	Lock on third target
	a. Aim dot in box
	b. Range rate 900 ±200 knots
	c. Break lock

manual_radar_air_to_air_bit_1

Step	System	Action
1.	Test knob	Set 2
2.	Lock on 10th target
	a. System breaks lock in less than 30 seconds.
3.	Lock on second target
	a. System maintains lock for at least 30 seconds.
	b. Range rate readout 900 ±200 knots
4.	Break lock
5.	Pulse switch	AUTO
	BEACON CHECK
6.	Radar mode knob	BEACON
	a. BIT targets disappear and at least one beacon target reappears.
7.	Radar mode knob	MAP

manual_radar_air_to_air_bit_2

Step	System	Action
1.	Test knob	Set 3
	a. B-sweep and EL strobe at 0 ±0.2° (before lockon).
2.	Lock on fourth target
	a. Aim dot rotates between ASE circle and the segmented circle (not exceeding either by more than 1/4 inch).
	b. Rmax and Rmin at 15 and 5 miles.
	c. ASE circle as shown.
	d. EL strobe goes 30° down (after lockon).
3.	Break lock and lock on 10th target
	a. Aim dot rotates inside ASE circle.
4.	Maintain lockon for BIT 4.

manual_radar_air_to_air_bit_3

Step	System	Action
1.	Test knob	Set 4 (figure a).
	a. All BIT targets disappear but lockon presentation remains.
	b. H light ON
	c. Range rate readout flashing, indicates 900 ±.200 knots, and last digit is replaced with the letter H.
2.	(P) Radar missile power switch	OFF (or when AIM-7 missiles are turned).
3.	Position B-sweep and EL strobe	At 0° for reference.
4.	Radar power knob	STBY.
	a. B-sweep and EL strobe drift less than +5° before unlock.
5.	Radar power knob	TEST.
6.	Action switch	FA (figure b).
	a. AOJ display appears.
	b. Range rate readout disappears And H light OFF.
7.	Track switch	AOJ OUT.
	a. System returns to search.
8.	Track switch	AUTO.
9.	Display	VI.
	a. B-sweep covers 3 bars on selected CAA corridor.
	b. EL-strobe scans from -21° to +57°.
10.	Display	B-wide.

manual_radar_air_to_air_bit_4a Figure a

manual_radar_air_to_air_bit_4b Figure b

Step	System	Action
1.	Test knob	Set 5
2.	Lock on third target
	a. Range rate readout 0 ± 300 knots.
	b. Aim dot inside of ASE circle.
	c. ASE circle 0.56 inch diameter.
3.	Break lock
4.	Pulse switch	SHORT
5.	(P) Sight mode knob	A/A
6.	Radar mode knob	BST
7.	Range knob	AI 5
8.	(P) Auto acq button	PRESS and RELEASE
	a. Radar locks on first target
9.	(P) Auto acq button	PRESS and RELEASE
	a. Radar breaks lock, range gate sweeps to next target and locks on.
	b. Repeat this step through all targets.
10.	Air-to-air button	PRESS
	a. Air-to-air light	OFF
	b. Radar control transfers to RCP.
11.	Break lockon
12.	Radar mode knob	MAP
13.	Range knob	AI 25
14.	Pulse switch	LONG
15.	Lock on fifth target
	a. RDR MAG indicates 1.4 to 1.8.
16.	Pulse switch	AUTO
	a. RDR MAG indicates 0.9 to 1.15 (PLMS).
17.	Aspect knob	TAIL
	a. Range rate readout displays fighter heading (0°-360°)
18.	Display knob	VI
	a. Updates fighter heading display.
19.	Display knob	B-WIDE
	a. Discontinues fighter heading update.

manual_radar_air_to_air_bit_5

Step	System	Action
1.	Test knob	Set 6
	The T (track) light illuminates but SKIN TRK light remains OFF during this test. This is a normal indication with the DSCG.
2.	Radar power knob	TEST
3.	Missile power switch	STBY
4.	Position range strobe	Beyond 15 miles.
	a. Rmax at 15 ± 1.5 miles, Rmin at 5 ± 1.25 miles.
	Range rate 000 knots Indicates AIM -7E missiles/plugs installed or stations empty. 900 knots indicates AIM-7F missiles/plugs installed. After OFP P005, the OFP version number will be displayed for the first 10 seconds in place of range rate readout; for example, OFP version P005 will be approximately 500 knots.
5.	Move range strobe down	(with half action or full action)
	a. Aim dot stationary inside box.
	b. HOLD ALT light ON beyond 15 miles, OFF at 15 miles.
	c. IN RANGE and SHOOT lights ON when range strobe is between Rmax and Rmin.
	d. ASE circle remains fixed in size.
	e. Break X occurs, ASE Circle and range rate readout disappear, IN RANGE/SHOOT lights OFF at 5 miles or less.
6.	Radar power knob	STBY

manual_radar_air_to_air_bit_6