POS MV V4 User Guide
Introduction
Copyright © Applanix Corporation, 2009
1-19
Event time tagging occurs when POS MV detects a TTL pulse on the Event 1
or Event 2 line, it captures the exact time that corresponds to the trigger edge
(within a window 1 μs wide). Event records are available for output on the
Ethernet data ports. Contact Applanix for advice if you need additional
information about the Ethernet group structure.
Output Summary
There are several types of communication interfaces that POS MV can use to
supply its data. You must select whichever type will be most suitable for the
specific multi-beam sonar in use.
In some cases, a multi-beam sonar can accept data in more than one format
(for example analog or digital). However, for specific installations, one type of
communications interface usually provides for a more accurate data
exchange than the other.
Electrical noise or sonar timing can have a significant effect on the images
produced by the multi-beam sonar. You must consider this when you select
the communications interface used to supply position, attitude and motion
data from POS MV. Because each installation will be different, this manual
cannot include explicit instructions in this area.
POS MV can use a variety of interface protocols to output information:
• RS-232
• Ethernet
• Analog (optional)
Each interface protocol is unique. Refer to the
Interfaces and Data Formats
description starting on page
3-1 for information on each of these interface
protocols.
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