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4 – Electrical Installation

DPN 402197 © TSS (International) Ltd Page 17 of 18

For your convenience and for test purposes, the 350 System can also create a logged

record internally on the SDC hard disk. Data stored using the internal logging facility

does not possess the same format as that transmitted to the external data logger, and

you should not use it as the primary survey log. Internal logging allows you to record

the survey and then to ‘replay’ the file subsequently using DeepView on the SDC.

You cannot replay external log files through the SDC in this way.

The internal logging facility on the 350 System is for your convenience and for test pur-

poses only. Do not use it as the principal survey logging tool.

Unless otherwise stated, this Manual describes the external logging facility of the 350

System.

Refer to sub-section 7.3.2 for a description of the format that the 350 System uses to

log data.

Make a connection between the 350 System and an external data logger using an

available 9-way D-type serial communication port on the SDC. The pin designations

of this port are as follows:

4.2.4 Interface to Video

Use the SDC ports ‘COLOUR CV IN’ and ‘COLOUR CV OUT’, or ‘MONO CV IN’ and

‘MONO CV OUT’, or ‘S-VIDEO IN’ and ‘S-VIDEO OUT’

1. Video input – Use appropriate input port for your format (COLOUR CV IN, MONO

CV IN, or S-VIDEO IN) These are clearly marked on the reverse panel of the SDC.

The standard SDC accepts video input in PAL or NTSC format from a camera

mounted on the ROV. Apply the video signal to the SDC through the appropriate

video input port. TSS supplies CV cables (dual phono to phono) and a pair of BNC

to phono adapters to assist video connection with the 350 System.

Note that you cannot display the video channel on the SDC screen.

The SDC mixes video images from the sub-sea camera with graphical information

generated by the SEP. You may view the composite image through the appropri-

ate video output port.

2. Video output – Use appropriate output port for your format (COLOUR CV OUT,

MONO CV OUT, or S-VIDEO OUT)

The format of the SDC video output signal will match that of the input video signal.

That is if your input is PAL, then the output will be PAL. Similarly if your input is

NTSC then the output will be NTSC. Further the video output will reflect the spe-

cific connections used i.e if the video input is monochrome CV, the output will be

monochrome CV and will be provided via the ‘MONO CV O/P’ port (similarly col-

Table 4–8: RS232 connection for a data logger

Signal to Data Logger COM-3 on the SDC

RS232 input to data logger Pin 3 (transmit)

RS232 common Pin 5 (ground)

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 252 253

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