Installation
The Ping Hold-off input signal is connected via a connector attached to the dry
end of a modified Processor to Head cable. This input signal is opto-isolated, and
accepts TTL, CMOS, RS-232, and similar voltage levels (see Figure 10).
Approximately 500 microseconds before the midpoint of each ping, the ping timer
(in the sonar head) samples the Ping Hold-off input signal. If the input is OFF, the
timer continues counting and pings normally. If the input is ON, the timer stops
counting, waits for the input to turn OFF, and then resumes counting and pings.
Figure 10, Ping Hold-off Details
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SeaBat 8101 Operator's Manual
2-9
Version 3.02
