Practical Elements of Operation
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© 2017 Nortek AS
is defined as positive increasing from the vehicle/INS Forward axis to the DVL’s X-axis.
DVL Origin
Those requiring a reference origin for the DVL may use the figure below. This information is typically
used for the moment arm calculations with an INS.
From left to right: DVL 1000 (300 m ), DVL 1000 (4000 m ), and DVL 500 (6000m /300m )
6.3
Trigger
The trigger mode specifies what controls the acoustic pinging. This is either the instrument and its
internal timing mechanism (INTSR), trigger from a command (SERIAL) or a hardware based trigger
(TTL or RS485 input lines). The hardware triggers will be ignored if they occur at a faster rate than
what is possible to process for the configured range.
Internal
1, 2, 3, 4, 5, 6, 7 or 8 Hz
Serial
Trigger option through command (Ethernet or serial)
External
TTL or 485 electrical interfaces.
Configurable trigger polarity (configurable Rising edge/Falling edge/Both edges)
