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SP-2
(3) Transceiver
Transmitter High power MOS FET amplifier with 10-step power reduction
switch
Receiver Low noise superheterodyne, continuously scanning beam form
ing, TVG, AGC, signal/processing, interference rejecter, hori
zontal verticalbeam switching.
(4) Beamwidth (-3 dB) and Tilt Angle
TX Beamwidth 360° (horizontal) x 10° to 13° (Vertical)
RX Beamwidth 8° to 16° (horizontal) x 11° to 14° (Vertical)
Tilt Angle -5° (upward) to 60° (downward), continuous.
NOTE: Beamwidth depends on transmitter frequency.
2. DISPLAY
(1) Picture Display CSH-23: PPI display on 15 inch non-glare, high-resolution
color CRT
CSH-24: PPI display on 21 inch non-glare, high-resolution
color CRT
(2) Color 16 colors (sonar picture), 4 colors (marks)
(3) Display Mode a) Normal Mode (*with or without data display)
b) Off-center
c) Echo sounder combination (normal plus echo sounder)
d) Audio combination
e) Port/ starboard combination
f) Horizontal slice combination
g) Target slice
h) True motion*
(4) Display Marks Own ship mark, heading mark, range rings, range/bearing mark,
trackball mark, event mark, net shooting mark, fish mark, esti-
mate, mark,bearing scale, north mark*, ship’s track*, current
mark*, net sonde mark*, target lock mark*
(5) Alphanumeric Data Sonar picture (range, tilt angle, gain)Trackball mark data (slant
range, horizontal range, depth, bearing), Event mark data (hori-
zontal range, depth, first event marked depth,bearing), Fish mark
data (distance moved*, direction* and speed* between two latest
fish marks), Estimate mark data (estimation of fish volume by
echo strength), Net shooting data (time and distance run* be-
tween turning on and off of net shooting mark), Setting change
data (new setting appears in larger characters for 5 seconds when
changed), Current data *(current speed, direction, layer, depth),
Navigation data *(ship’s speed, heading, water depth, water
tempera ture), Own ship’s position *(latitude/longitude), Net
sonde data *(net depth, distance to seabed, water temperature,
sinking speed of net)