2-2 CHAPTER 2 Specifications
Series 3000 Sonar System Operations and Maintenance Manual 11210066, Rev. 11
2.2 Transceiver and Processing Unit (TPU)
2.2.1 TPU Operation
The only operator control on the TPU is the main power switch.
2.2.2 Towfish Input/Output
Quantity: 1
Connector: Type N
2.2.3 Trigger/IRIG Input (Optional)
The trigger/IRIG input, which is optional, is used to trigger the system externally.
Quantity: 1
Input level: TTL compatible, positive edge triggered
Rise time: 1 µs maximum
Pulse width: 100 µs minimum
Impedance: 10 Kohm
Connector: Type N
2.2.4 Trigger Outputs
The trigger outputs are used to slave external processors or other equipment such
as locators. The main trigger output runs at the trigger rate determined by the
RANGE setting. The auxiliary trigger occurs at a sub-multiple of this, determined
by the AUX TRIG DIVISOR setting.
Quantity: 2
Output level: CMOS/TTL compatible
Pulse width: 100 µs nominal
Connector: BNC
2.2.5 RS-232 COM 1, COM3 and COM4 Ports
Quantity: 3
Baud rate: 9600 baud
Connector: 9-pin DSUB for receiving sensor data
and sending control commands to the
TPU
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