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3.7
Topside System Controls and Indicators
The SP-III TPU includes controls and indicators on the side panel. The Rack
Mount TPU and the SonarPro Workstation include controls and indicators on the
front panels. The SonarPro Workstation also has its power switch on the back
panel.
3.7.1
All of the controls and indicators are located on the side panel of the SP-III TPU as
shown in Figure 3-1 on page 3-6. They are the following:
PWR:
A/C-D/C:
T/F PWR:
T/F TRIG:
RESP TRIG:
LOCK LOSS:
D/C POLARITY:
3.7.2
All of the Rack Mount TPU controls and indicators are on the front panel which is
shown in Figure 3-4.
The Rack Mount TPU controls and indicators are the following:
POWER switch:
POWER:
Topside System Controls and Indicators
SP-III TPU Controls and Indicators
Green indicator that is illuminated when either AC
or DC power is on.
3-position switch that when switched to A/C, selects
AC power to power the SP-III TPU, and when
switched to D/C, selects DC power. With the switch
in the center OFF position, power is disconnected.
Blue indicator that is illuminated when 200 VDC is
being applied to the towfish.
Yellow indicator that flashes when the sonar pings.
Yellow indicator that flashes when a responder
trigger pulse is output.
Red indicator that illuminates when the telemetry
link with the towfish is interrupted or lost.
Red indicator that illuminates when the polarity of
the DC input power is reversed.
Rack Mount TPU Controls and Indicators
Rocker switch/circuit breaker that turns the Rack
Mount TPU on or off and provides AC input current
protection. Should the breaker trip, the switch/
circuit breaker will switch to the OFF position. To
reset it, switch it to the ON position.
Green LED that is on when the Rack Mount TPU is
powered.
3-15
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