SP - 1
SPECIFICATIONS OF MARINE RADAR
MODEL 18x4C/19x4C SERIES
1 GENERAL
1.1 Range, Pulselength (PL) & Pulse Repetition Rate (PRR)
Range (nm) Pulselength (μs) PRR (Hz approx.)
0.125 to 1.5 0.08 2100
1.5 to 3 0.3 1200
3 to 72* 0.8 600
*Maximum Range: M1824C: 24nm, M1834C: 36nm, M1934C: 48nm, M1944C: 64nm,
M1954C/1964C: 72nm
1.2 Range Resolution M1824C: 15 m, Others: 18 m
1.3 Bearing Resolution M1824C: 5.5°, M1833C: 4.0°, M1934C: 2.4°, M1944C: 1.9°,
M1954C/1964C: 1.9° (XN12A), 1.2° (XN13A)
1.4 Minimum Range M1824C: 27 m, Others: 33 m
1.5 Bearing Accuracy ±1°
1.6 Range Ring Accuracy 0.9 % of range or 8 m, whichever is the greater
2 ANTENNA UNIT
2.1 MODEL1824C:
2.1.1 Radiator Micro-strip
2.1.2 Polarization Horizontal
2.1.3 Antenna Rotation 30/24 rpm nominal (for short/long range)
2.1.4 Radiator Length 45 cm
2.1.5 Horizontal Beamwidth 5.2°
2.1.6 Vertical Beamwidth 25°
2.1.7 Sidelobe Attenuation -19 dB or less (within ±20º of main-lobe)
-21 dB or less (±20º of main-lobe or more)
2.2 MODEL1834C:
2.2.1 Radiator Printed waveguide array
2.2.2 Polarization Horizontal
2.2.3 Antenna Rotation 24 rpm nominal
2.2.4 Radiator Length 60 cm
2.2.5 Horizontal Beamwidth 3.9°
2.2.6 Vertical Beamwidth 20°
2.2.7 Sidelobe Attenuation -18 dB or less (within ±20° of main-lobe)
-23 dB or less (±20° of main-lobe or more)
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