11.8  Scanner (NKE-2254-6HS)
yyy
yyyy
yyyy
11.8 SCANNER UNIT 
NKE-2254-6HS (JMA-5322-6HS) 
 
(1) Dimensions  Height 536 mm × Swing Circle 1910 mm 
 
(2) Mass  Approx. 55kg 
 
(3) Polarization  Horizontal Polarization 
 
(4) Directional Characteristics  Horizontal Beam Width : 6 ft : 1.2° 
Vertical Beam Width : 20° (-3 dB width) 
Sidelobe Level :    Below -26 dB (within+/-10°) 
      Below -30 dB (outside+/-10°) 
 
(5) Revolution  48 rpm (Normal) 
 
(6) Peak Power  25 kW+/-50% 
 
(7) Transmitting Frequency  9410+/-30 MHz 
 
(8) Transmitting Tube  Magnetron [M1568BS] 
 
(9) Pulse Width/Repetition Frequency  SP1 : 0.07 μs/2250 Hz 
MP1 : 0.2 μs/2250 Hz, MP2 : 0.3 μs/1900 Hz,   
MP3 : 0.4 μs/1400 Hz 
LP1 : 0.8 μs/750 Hz, LP2 : 1.0 μs/650 Hz, LP3 : 1.2 μs/510 Hz 
0.125 NM  SP1 
0.25 NM  SP1 
0.5 NM  SP1 
0.75 NM  SP1/MP1 
1.5 NM  SP1/MP1/MP2/MP3 
3 NM  MP1/MP2/MP3/LP1 
6 NM  MP1/MP2/MP3/LP1/LP2 
12 NM  MP1/MP2/MP3/LP1/LP2 
24 NM  MP3/LP1/LP2 
48 NM  LP2 
96 NM  LP3 
 
(10) Duplexer  Circulator + Diode Limiter 
 
(11) Mixer  MIC Front End 
 
(12) Intermediate Frequency Amplifier  Intermediate Frequency : 60 MHz 
Band Width :    25 MHz (0.07 μs) 
   8 MHz (0.2 μs, 0.3 μs, 0.4 μs) 
   3 MHz (0.8μs, 1 μs, 1.2 μs) 
Gain : More than 90 dB 
Amplifying Characteristics : Logarithmic Amplifier 
11 
 
(13)  Overall Noise Figure  7.5 dB (Average) 
 
(14)  Compass Safe Distance  Standard  2.4 m 
Steering 1.8 m 
 
11-8