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US Military Sensors : AS-616A/SLR

AS-616A/SLR
Physical Dimensions
Height 68 inches
Diameter 45 1/2 inches
Weight 385 lbs
Operating Temperature -35 C to +55 C
Frequency Range Unavailable
Input Impedance 50 ohms
VSWR > 4.5:1 over freq range
Polarization Horizontal or Vertical
RF Power Rating n/a, receive only
Power Requirement Servo power and control voltages supplied from control unit. 115 vac 60 Hz, 1 phase required for space heater, fan, and servo/synchro reference.
Horizontal Scan 360 deg, mechanical
Feed Type Unbalanced, coaxial cable
Input Connector Type N

Description: The AS-616A/SLR Antenna is a rotatable two-band array used with electronic countermeasures . equipment. It consists of a pedestal and a multi-antenna array. The pedestal contains the servo motor, slip ring assembly, rotating joint, rate generator and azimuth synchro generator. The antenna array has two low frequency dipole antennas arranged back-to-back, one horizontally polarized and the other vertically polarized. The high frequency antenna consists of two horn arrays arranged back-to-back and of opposite polarization mounted below the low frequency dipoles. Two coaxial switches are mounted on the array to allow selection of polarization, each array from a remote control position. Control of antenna may be accomplished by use of a control indicator, such as the C-1609/SLR Control Indicator. A CW-456/SR radome covers the entire array.

Installation: The antenna should be located so as to provide an omnidirectional line-of-sight view of the horizon with a minimum of obstructions. The pedestal casting has four 13/16 inch bolt holes on 16 inch centers for mounting purposes. A minimum clearance of 12 inches is required below the pedestal for connecting the coaxial transmission lines.

Considerations: The AS-616A/SLR should not be located closer than 10 feetfrom masts and other structures having large diameters. It should not be installed in the strong fields of transmitting antennas.
Drawing

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