Furuno 1823C manual Transceiver Module

2.3.1	Radiator	Slotted waveguide array
2.3.2	Polarization	Horizontal
2.3.3	Antenna Rotation	24 or 48 rpm nominal
		High brilliance monitor: 24 rpm nominal only
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	MODEL1943C:
2.4.1	Radiator	Slotted waveguide array
2.4.2	Polarization	Horizontal
2.4.3	Antenna Rotation	24 or 48 rpm nominal
		High brilliance monitor: 24 rpm nominal only
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)

2.5MODEL1953C:

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)
3	TRANSCEIVER MODULE
3.1	Frequency and Modulation 9410 MHz ±30MHz (X band), P0N
3.2	Peak Output Power	M1823C: 2.2 kW nominal,
		M1833C/1933C: 4 kW nominal,
		M1943C: 6 kW nominal, M1953C: 12 kW nominal
3.3	Modulator	FET Switching Method
3.4	Intermediate Frequency	60 MHz
		SP - 2	E3503S02J-M
			03/09/24