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SPECIFICATIONS OF MARINE RADAR
MODEL 1622
1. GENERAL
(1) Indication System PPI Daylight display, raster scan, 4 tones in monochrome
(2) Range, Pulselength (PL) & Pulse Repetition Rate (PRR)
Range (nm) 0.125, 0.25, 0.5, 0.75 1, 1.5, 2 3, 4, 6, 8, 12, 16
Pulse Length 0.12
µ
s (short) 0.3
µ
s (medium) 0.8
µ
s (long)
Pulse Repetition Rate 2100 Hz nominal 1200 Hz nominal 600 Hz nominal
(3) Range Resolution Better than 50 m
(4) Bearing Discrimination Within 7.7
°
(5) Minimum Range 41 m
(6) Bearing Accuracy Within 1
°
(7) Range Ring Accuracy 0.9 % of range or 8 m, whichever is the greater
2. SCANNER UNIT
(1) Radiator Micro-strip
(2) Polarization Horizontal
(3) Antenna Rotation Speed 24 rpm nominal
(4) Radiator Length 34 cm
(5) Horizontal Beamwidth Less than 6.2
°
(6) Vertical Beamwidth 25
°
(7) Sidelobe Attenuation Less than -20 dB
3. TRANSCEIVER MODULE
(1) Frequency 9410 MHz
±
30MHz (X band)
(2) Modulation P0N
(3) Peak Output Power 2.2 kW
(4) Modulator FET Switching Method
(5) Intermediate Frequency 60 MHz
(6) Tuning Automatic
(7) Receiver Front End MIC (Microwave IC)
(8) Bandwidth 7 MHz
(9) Duplexer Circulator with diode limiter
(10) Time of Heat-up 1-min. approx.