References:
Naval Radar by Norman Friedman

CXAM

Type: Surface/Air Search
Manufacturer: RCA
Quantity Built: 6
Availability Date: July 1940
Installation: 9 components weighing a total of about 5,000 lbs. (Antenna included)
Antenna Weight: 1,500 lbs (with pedestal)
Antenna Dimensions: 15' x 15'8”
USN Band: A Band
IEEE Band: P Band (1.5 meters)
Power:15 kilowatts
PRF: 1640
PRI: 3 microseconds
Scan Rate: 5 rpm
Beamwidth:14 x 70 deg
Range Accuracy: ± 300 yds
Azimuth Accuracy: ± 3°.
Detection Example 1: Battleship at 16 nautical miles
Detection Example 2: Destroyer at 12 nautical miles
Detection Example 3: Fighter at 10,000 feet at 50 nautical miles
Detection Example 4: PBY at 10,000 feet at 70 nautical miles
Operators: One Per Shift
Power Required: 5 KW at 110V, 60 Hz. Motor-generator is supplied with set if ship's power is not suitable.

Notes: Could be elevated to gain height data.

CXAM-1

Type: Surface/Air Search
Manufacturer: RCA
Quantity Built: 14
Availability Date: Late 1941
Installation: 9 components weighing a total of about 5,000 lbs. (Antenna included)
Antenna Weight: 1,500 lbs (with pedestal)
Antenna Dimensions: 15' x 15'8”
USN Band: A Band
IEEE Band: P Band (1.5 meters)
Power:15 kilowatts
PRF: 1640
PRI: 3 microseconds
Scan Rate: 5 rpm
Beamwidth:14 x 70 deg
Range Accuracy: ± 200 yds
Azimuth Accuracy: ± 3°.
Detection Example 1: Battleship at 16 nautical miles
Detection Example 2: Destroyer at 12 nautical miles
Detection Example 3: Fighter at 10,000 feet at 50 nautical miles
Detection Example 4: PBY at 10,000 feet at 70 nautical miles
Operators: One Per Shift
Power Required: 5 KW at 110V, 60 Hz. Motor-generator is supplied with set if ship's power is not suitable.

Notes: Antenna could not elevate (compared to CXAM); and it had improved accuracy over CXAM.