Garmin GMR 190-00669-02 - Manual (Page 11)

GMR 404/406 Marine Radar Installation Instructions 
Specifications
4 ft Open-Array Antenna:
Type: End fed slotted waveguide
Horizontal Beamwidth: 1.8 degrees
Horizontal Sidelobes: -23 dB within ±10 deg of main
-30 dB outside ±10 deg of main
Vertical Beamwidth: 24 degrees
Antenna Gain: 29 dBi
Polarization: Horizontal
Input Return Loss Better than -20 dB
Weight 12 lbs (5.4 kg)
6 ft Open-Array Antenna:
Type: End fed slotted waveguide
Horizontal Beamwidth: 1.1 degrees
Horizontal Sidelobes: -25 dB within ±10 deg of main
-30 dB outside ±10 deg of main
Vertical Beamwidth: 24 degrees
Antenna Gain: 30 dBi
Polarization: Horizontal
Input Return Loss: Better than -20 dB
Weight: 16 lbs (7.3 kg)
Open-Array Scanner
Transmit Power: 4 kW
Transmitter Frequency: 9410 ±30 MHz
Input Voltage: 10.5 – 38 VDC
Typical Input Power: 45 W
Input Power (100 kts wind): 130 W maximum
Range/Pulse Width/PRF (nm/nsec/Hz): 0.125/65/2304
0.250/65/2304
0.500/80/2304
0.750/200/1152
1.0/250/1152
1.5/500/576
2.0/500/576
3.0/800/576
4.0/800/576
6.0 – 24/1000/576
36 – 72/1000/288