DATASONICS SIS-1500 System Manual page 100

5-18
Optional sensor data are
not present in the
Parameters display.
The heading display does
not correlate with the ship's
heading.
The optional responder
does not transmit.
There are random changes
in the signal intensity on
both sonar displays.
There are random changes
in the signal intensity on
only one of the sonar
displays.
Volume I System Manual
Table 5-4 Operation Problems
Symptom
The display parameter
settings are not configured
properly.
The heading sensor is not
calibrated.
The responder transducer is
not properly connected to the
sonar electronics.
There is no external
responder key.
There is no responder key
output from the digital
multiplexer.
There is no responder key
output from the Cable
Interface board in the sonar
electronics.
The altitude of the tow vehicle
is not stable.
The transducer array cable
for the corresponding
transducer array in the tow
vehicle is faulty.
Possible Cause
DATASONICS
Corrective Action
Refer to Configuring the
Display Parameter Settings
on page 3-22 and configure
the display parameters.
Refer to Heading Sensor
Calibration on page 5-20 and
calibrate the heading sensor.
Check the wiring between the
responder transducer in the
nose of the tow vehicle and
the sonar electronics.
If an external source is being
used to key the responder,
verify that it is connected to
the RESP KEY IN connector
on the digital multiplexer.
Check TP31 on the
Multiplexer board in the digital
multiplexer. If there is no key
signal, replace the board.
Check TP10 on the Cable
Interface board. If there is no
key signal, replace the board.
Check the altitude display. If
the altitude is varying, select
the opposite channel to track
the bottom or adjust the
bottom tracking. These
settings are made in the
Bottom Tracking area of the
Setup dialog box.
Refer to Cable Checks on
page 5-19 and check the
transducer array cable.
June 1998