MDC-1840BB/1841BB/1860BB/1810BB/1820BB Series
Chapter 3
Operation Manual
Technical Specifications
0093142122-08
3-1
Chapter 3 Technical Specifications
3.1 Antenna specification
Model name
MDC-1840BB MDC-1841BB
MDC-1860BB MDC-1810BB
MDC-1820BB
Aerial length
3 feet / 4 feet
2 feet
4 feet / 6 feet
Peak power
output
4kW 6kW
12kW
25kW
Frequency
9410 +/- 30 MHz
Beam width
Horizontal
2.5
o
/ 1.8
o
3.9
o
1.8
o
/ 1.2
Vertical
22
o
25
o
22
o
Side lobes
/- 10
o
Better than
–23dB
Better than
–20dB
Better than –23dB
O/- 10
o
Better than
–30 dB
Better than
–20dB
Better than –30 dB
Rotation
24/48 r.p.m.
Transmission pulse
4 kW
6 kW/12 kW
25 kW
width
S (Short
pulse)
0.08
μ
s / 2000 Hz
0.08
μ
s / 4000 Hz
0.08
μ
s/2000Hz
M1 (Medium 1
pulse)
0.25
μ
s / 1500 Hz
0.25
μ
s / 2000 Hz
0.3
μ
s/1300Hz
M2 (Medium 2
pulse)
0.8
μ
s / 600 Hz
0.5
μ
s / 1000 Hz
0.6
μ
s/800Hz
L (Long pulse)
0.8
μ
s / 600 Hz
1.0
μ
s / 500 Hz
1.2
μ
s / 500Hz,
450Hz(96NM)
IF center
frequency
60 MHz
IF bandwidth
15 MHz (S, M1) / 3 MHz (M2, L)
Noise figure
Better than 6 dB
Operation in wind
100 knots as relative
Water proofing
grade
IPX6 (IEC60529)
3.2 Processor specification
Effective
diameter
269
mm (at 18 inch LCD monitor)
Resolution
1280 x 1024 pixels
Video level
8 levels
Presentation
mode
Head-up, north-up, course-up and true motion
Range scale
(NM)
1/8 1/4 1/2 3/4 1.5 3 6 12 24 48 (4 kW) 64 (6 kW) 72 (12 kW) 96 (25 kW)
Rings interval
(NM)
1/16 1/8 1/4 1/2 1 2 4 8 (4 kW) 16 (6 kW) 12 (12 kW) 16 (25 kW)
Off-centering
Sweep origin can be moved to any point within 2/3 of the screen radius.
