Furuno 1834C-BB - Manual (Page 221)

SP - 2
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)
2.3 MODEL1934-BB:
2.3.1 Radiator
Slotted waveguide array
2.3.2 Polarization Horizontal
2.3.3 Antenna Rotation 24 or 48 rpm nominal
2.3.4 Radiator Length 100 cm (XN10)
2.3.5 Horizontal Beamwidth 2.4°
2.3.6 Vertical Beamwidth 27°
2.3.7 Sidelobe Attenuation -20 dB or less (within ±20° of main-lobe)
-28 dB or less (±20° of main-lobe or more)
2.4 MODEL1944C-BB:
2.4.1 Radiator
Slotted waveguide array
2.4.2 Polarization Horizontal
2.4.3 Antenna Rotation 24 or 48 rpm nominal
2.4.4 Radiator Length 120 cm (XN12)
2.4.5 Horizontal Beamwidth 1.9°
2.4.6 Vertical Beamwidth 22°
2.4.7 Sidelobe Attenuation -24 dB or less (within ±20° of main-lobe)
-30 dB or less (±20° of main-lobe or more)
2.5 MODEL1954C-BB/1964C-BB:
2.5.1 Radiator
Slotted waveguide array
2.5.2 Polarization Horizontal
2.5.3 Antenna Rotation 24 or 48 rpm nominal
2.5.4 Radiator Length 120 cm (XN12), 180 cm (XN13, 24rpm only)
2.5.5 Horizontal Beamwidth 1.9° (XN12), 1.2° (XN13)
2.5.6 Vertical Beamwidth 22°
2.5.7 Sidelobe Attenuation
XN12: -24 dB or less (within ±20° of main-lobe)
-30 dB or less (±20° of main-lobe or more)
XN13: -24 dB or less (within ±10° of main-lobe)
-30 dB or less (±10° of main-lobe or more)