SCR-540

IEEE Band

P Band (193 MHz)

NATO Band

A Band

Peak Power:

10 kW

Type of Radar:

Maximum Range:

Range Accuracy:

Description:

The SCR-540 is a long wave AI equipment designed from the British AI Mark IV. Two "A" type indicators are used, one for azimuth and one for elevation. External antennas provide azimuth and elevation sensing. IFF signals displayed directly on the scope. SCR-540 operates with the SCR-640 racon. Test set IE-30 is required for maintenance.

Performance/Siting

Maximum beacon range: 100 miles. Maximum search range, 17,000 to 20,000 ft. Minimum range, 300 to 500 ft. Range accuracy, ± 10%. Azimuth limits, 70° forward on either side of line of flight. (No targets detected at ranges greater than plane's altitude.) Azimuth accuracy: right or left indication only when target is more than 5° from line of flight. Within 5° of line of flight, target will show as straight ahead. Elevation limits (at 20,000' altitude), ± 20° from forward line of flight. Elevation accuracy, same as azimuth accuracy.

Transportability:

Set is packaged in 7 units weighing about 225 lbs. Largest package measures 13" x 6" x 26" and weighs 32 lbs. Set is air transportable in any cargo plane.

Installation:

Set is installed in P-70, Beaufighters, and A-20's. Installed weight is about 210 lbs.

Personnel:

One radar operator and one maintenance man are minimum requirement.

Power:

Primary power required: 40 amperes at 27.5 volts from plane's DC supply.