Furuno FR-8251 Manual De Usuario
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SPECIFICATIONS
Antenna Unit
Type
Slotted waveguide array
Polarization
Horizontal
Length
4 ft(XN2)
6.5 ft(XN3)
6.5 ft (XN3A)
8 ft(XN4A)
Beamwidth
1.8 x 25
°
1.2 x 25
°
1.23 x 20
°
0.9 x 20
°
Rotation speed
24 rpm (36 rpm optional)
Transceiver Module
Frequency
9410 MHz
±
30 MHz (X-band)
Peak output power
FR- 8051: 6 kW
FR- 8111: 10 kW
FR- 8251: 25 kW
FR- 8111: 10 kW
FR- 8251: 25 kW
Transmitting tube
FR- 8051: MAF1422B
FR- 8111: MAF1425B
FR- 8251: 9M752 or M5187F
FR- 8111: MAF1425B
FR- 8251: 9M752 or M5187F
Pulselength (PL) & Pulse Repetition Rate (PRR)
)
s
e
l
i
m
l
a
c
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t
u
a
n
(
e
g
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a
R
L
P
R
R
P
5
2
1
.
0
5
2
.
0
5
.
0
5
7
.
0
5
.
1
3
6
2
1
4
2
8
4
2
7
6
9
P
S
z
H
0
0
1
2
s
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8
0
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0
1
P
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2
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s
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3
.
0
2
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H
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1
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s
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r
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m
6
.
0
P
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H
0
0
6
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2
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2
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5
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)
y
l
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P
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,
2
P
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,
1
P
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2
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h
w
z
H
0
0
5
Modulator
FR-8051/8111: FET switching method
FR-8251: Line Pulse
FR-8251: Line Pulse
I/F amplifier
Logarithmic, IF 60 MHz
Bandwidth: 25MHz (0.08
Bandwidth: 25MHz (0.08
µ
s), 2.5 MHz (0.3
µ
s, 0.6
µ
s, 1.2
µ
s)
Tuning
Automatic or manual
Receiver front end
MIC (Microwave IC)
Duplexer
Circulator with diode limiter