Banner DF-G1-PR-Q7 Instrucciones de operaciones Pagina 94

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6 – Operation software
DPN 402197 © TSS (International) Ltd Page 15 of 32
The above screen shows an example of the 350 Spectrum Analyser Window with
panels for two active channels, Starboard Vertical and Starboard Lateral. This shows
the system tracking a 33Hz tone. The trace shows the expected peak at 33Hz, a peak
at 50Hz (produced by the mains power frequency) and harmonics of these frequen-
cies at 66, 99 and 100Hz.
During operation each of these display panels shows the signal voltage measured on
their respective channels against a horizontal time scale and a vertical scale in volts.
Note that the vertical scale is logarithmic: each division represents a 10 times
increase in voltage. The frequency axis can be either 25, 50, 100 or 200Hz. Select a
suitable axis to allow the tone frequency to be displayed. The data can be displayed
in two formats: either a graph drawn with a continuous line or bars representing the
strengths of each 1Hz band. To change between the two views, press the small graph
button to the bottom right of each graph.
The tone frequency is also shown on the display as a vertical white line. This can
assist in adjusting the tone frequency set in the Survey Parameters (section 6.1.1.1)
to that present on the cable. The threshold is also shown as a horizontal dotted line.
In the drawing, this is at the default setting of 100µV.
Using and understanding the Spectrum Display is critical to setting up and using the 350 Cable
Survey System. It allows a check to be made that the tone frequency can be distinguished from
background noise. It also allows the presence of noise sources to be determined and identified.
System errors
The System Errors window, shown in Figure 6–7, displays a list of all errors and
events reported by the 350 System. The list includes cleared and uncleared errors.
The window can include up to 600 lines of text, with a scroll bar that allows you to
search through the list. When the list includes 600 lines of text, DeepView for Win-
dows will delete the oldest message in the list to provide room for any new ones.
Figure 6–7: System Errors window
The lines of text always have the format described in Table 6–3.
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