Furuno CSH-5 MARK-2 Operator's Manual

COLOR SCANNING SONAR
CSH-5 MARK-2 Operator's guide
The purpose of this operator's guide is to provide the basic operating procedures for this equip-
ment. For detailed information, refer to the operator' manual.

Basic operation

1 . Press the POWER switch on the main panel.
The lamp at the left of the switch lights.
2 . Press the TRANSDUCER "h" key.
The lamp above the switch lights when the
transducer is fully lowered.
3 . Adjust the BRILLiance and CONTRAST
controls.
4 . Select a display range by RANGE switch
on the control box.
5 . Set a tilt angle by operating the TILT lever.
6 . Adjust the GAIN control.
Eliminating unwanted feeble
echoes (Adjusting TVG)
If the color changes suddenly to weaker col-
ors as the fish echo while it approaches, ad-
just the TVG NEAR and FAR.
1 . Press the MENU key .
2 . Rotate the RANGE switch to select TVG
NEAR or TVG FAR .
3 . Rotate the GAIN switch to set TVG near
or TVG far .
When sea surface reflections or plankton lay-
ers disturb the picture, adjust the NEAR con-
trol to eliminate them. They will be eliminated
by decreasing the control setting by 1 or 2.

Suppressing seabed tail

Adjusting the AGC control
1. Ratate AGC control clockwise little by
little.
Adjusting PULSELENGTH
1 . Press the MENU key .
2 . Rotate the RANGE switch to select
PULSELENGTH .
3 . Rotate the GAIN switch to reduce the
PULSELENGTH (1: minimum, 10: maxi-
mum).
Suppressing seabed and sea
surface reflection in shallow
fishing
1 . Press the MENU key.
2 . Rotate the RANGE switch to select TX
OUTPUT.
3 . Rotate the GAIN switch to reduce the TX
OUTPUT (1: minimum, 10: maximum).
Rejecting sonar interface and
noise
Adjusting TX CYCLE
(To eliminate interference rings)
1 . Press the MENU key.
2 . Rotate the RANGE switch to select TX
CYCLE.
3 . Rotate the GAIN switch to reduce the TX
CYCLE (1: minimum, 10: maximum).
Adjusting the NOISE LIM control
Weak, unwanted reflections, colored light blue
or green due to contaminated, plankton lay-
ers or ship's noise can be eliminated by the
NOISE LIM control.