User's Manual

32 |
Speci cations |Halo pulse compression radar installation manual
Side lobe level 4 ft Below -23 dB max. (within ±10°)
Below –30dB max. (outside ±10°)
Side lobe level 6 ft Below -23 dB max. (within ±10°)
Below –30 dB max. (outside ±10°)
Transmitter frequency Synthesized - Upper half of X-Band 9.410 - 9.495 GHz
Peak power output 25 W ± 10% under any transmit condition – up to 10%
duty cycle max
Pulse length/PRF and
Compression ratio
300’ to 1/8 nm: 0.04 μsec
1/4 to 1/2 nm : 2 μsec
3/4 to 1.0 nm : 8 μsec
1.5 to 2.0 nm : 16 μsec
3.0 to 4.0 nm : 32 μsec
6.0 to 24 nm : 64 μsec
36 to 72 nm : 96 μsec
E ective Pulse Compression Ratio less than 150 in all
modes
Burst repetition rate is 500-2000 Hz and the number of
pulses in a burst are variable
SART/RACON Triggering Yes – trigger distance: about 1nm max – weather, sea
state, and SART position dependent
Duplexer Circulator and isolator
Mixer MIC front-end
IF section Center frequency: 28.625 MHz
Bandwidth: 40 MHz max.* A/D; 16 bit 115 MSPS
*Narrower bandwidths de ned by signal processing
Noise  gure 5 dB (Average) at front-end input.
Other
Communications Ports Ethernet 10/100 Base-T for radar data and control
Micro-C male / NMEA2000 via RI-12
NMEA2000 PGNS USED
127250 - Vessel Heading
127251 - Rate of Turn
129025 - Position, Rapid Update
129026 - COG & SOG, Rapid Update
129029 - GNSS Position Data
130818 - Proprietary
NMEA-0183 Input via RI-12 ..
Sentenses used by the radar application. HDG, HDT,
HDM, GGA, GLL, RMC, VTG.
Baud rate 4800
Antenna park
Remote power on
Motor Brushless with solid state commutation with
electromagnetic braking for parking.
Inter-connecting cable Uses the same cable as the 3G/4G radars
Available in:
10 m (33 ft), 20 m (66 ft), 30 m (100 ft) lengths
Ships with (
20 m (66 ft) Max length 30 m (100 ft)
Options for cable to exit from rear of pedestal or pole
mount
Draft_08_April_2015