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Radar System Engineering

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SEC. 15.14] DETAILED DESIGN OF THE ANjAPS-10 619<br />

pressure pump. The weight, power consumption, and size of the units<br />

are summarized in Table 15.1. Table 15.2 gives more detail on the<br />

design of the various<br />

units.<br />

The transmitter-receiver unit contains the magnetron, the modulator<br />

and its power supply, the duplexer, the TR switch, the mixer, and the<br />

local oscillators, as well as a motor-driven time-delay switch for modulator<br />

turn-on, and a trigger amplifier for the modulator. The receiver strip,<br />

TABLE 15.2,—DETAILED Specifications OF THE ANT/APS-10<br />

Total weight of units and mountings. ., 124* lb less cables<br />

Primary power required<br />

Alternating current. . 115v. 400–2400cps, 340 watts<br />

Direct current. . . . . . . . . . . . . . . . . . ... ... ,,, .27.5 v,80 watts<br />

Over-all system performance<br />

Transmitter frequency.<br />

9375 f 55 Me/see<br />

Pulse power . . . . . . . . . . . . . . . . .<br />

10kw<br />

Receiver sensitivity, search, 131 db below 1 watt<br />

Receiver sensitivity, beacon. 125 db below 1 watt<br />

Pass band of untuned r-f components. 9280 ~ 185 Me/see<br />

Modulator<br />

Type . . . . . . . . . . . . . . Line-type with hydrogen thyratron<br />

PRF, search ...,..., . . . . ..810pps<br />

PRF, beacon . . . . . . . . . . . . . . . . . . . ..4O5pps<br />

Pulse length, search . . . . . . 0,8psec<br />

Pulse length, beacon.,.......,,.. 2,2@ec<br />

Receiver<br />

Intermediate frequency. 30 Me/see<br />

Bandwidth of i-f amplifier, 5.5 + 1.0 Me/see<br />

Indicator<br />

Type (Sec. 13.17) 5-in. resolved-current PPI<br />

Focus . . . Permanent magnet<br />

Cathode-ray tube. 5FP14 (or 5FP7)<br />

Video bandwidth.. :.. :::: :::” ”:: . . ..sec/sec<br />

Antenna<br />

Reflector . . . . . . . . . . . . . . . . . . . . . . . 18-in. paraboloid; j= 5.67 in;<br />

7000-ft cosecant-squared pattern<br />

Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Two-dipole type<br />

Gain . . . . . . . . . . .<br />

. . . . . . . . . . . ..7oo<br />

Polarization. . Horizontal<br />

Azimuth beamwidth. ..”. . . . . . . . . .::::5°<br />

Scanner<br />

Scan rate . . . . . . . . . .<br />

. . . ..30rpm<br />

Tilt angle . . . . . . . . . . . . . . . . . . . ..0 °to–180<br />

Triangle . . . . . . . . . . . . . . . . . . . ..6+0to–10~0<br />

Number of tubes<br />

Transmitter-receiver, 31 tubes and 3 crystals<br />

Synchronizer . . . ., ., 25<br />

Indicator ...,..... ,, ... 4<br />

Rectifier power supply, , ...,,.... 6<br />

* With atmdard scanner, Lightweight wanner reduces total weight to 117 lb.

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