3660-MANUL-V01.01.00-CDC3 Operating Manual
Page 21 of 30
4.4.6
Three-Phase Data Capture Sequence
For the three-phase data capture, events for all phases will be captured, and then for each filter a waveform
capture will be done triggering from each of the channels. This is shown in Table 3.
Sets of 100 waveforms are captured with each filter, for each trigger channel. As the CDC is in three-phase
mode, each set of waveforms will contain a waveform from each channel. This gives a total of 2,700
waveforms or 900 waveforms per channel.
As there are more data capture stages, for cables with the same levels of activity the three-phase data capture
will take longer than for single-phase captures.
Stage
Filter
Data Type
Trigger Channel
1
Unfiltered
Raw
All
2
Unfiltered
Waveforms
1
3
Unfiltered
Waveforms
2
4
Unfiltered
Waveforms
3
5
Filter 1
Raw
All
6
Filter 1
Waveforms
1
7
Filter 1
Waveforms
2
8
Filter 1
Waveforms
3
9
Filter 2
Raw
All
10
Filter 2
Waveforms
1
11
Filter 2
Waveforms
2
12
Filter 2
Waveforms
3
Table 3
Three-phase capture sequence
4.4.7
Invalid Phase Reference
When starting the data capture, if a phase reference is not detected, the error message in Table 3Figure
39 will appear. It is not possible to capture data without a phase reference present as it allows
classification of events based on the phase position. If this error occurs, please address the issue by
using an alternative phase reference source.
Figure 39
Invalid phase reference message