User guide
ELI
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ECH001XN111-A4 – 07/2022
64
Handheld mode measurement
4.5 DPMC
1.
The index given above is the phase shift value in degrees.
2.
The index, indicated in white below, is the ratio between the effective signal and the average noise in dB
(S/N). To validate a point, this value must be greater than 6dB.
•
To help you in study of point, in the lower part of the graph, the system plots two solid curves.
1.
The green curve represents the effective signal.
2.
The red curve represents the average noise level.
3.
The 2 index displayed on the right of the Minimum/Maximum values are the effective and average noise
signals. These values are specific to the system and have no scientific value. Calculated in the electrical dB
(20*log(signal)), they are provided for information to allow qualitative comparison between several measure-
ments.
In the goal of helping the analysis, two draggable marks (A and B) can be place on the graph in order to automatically
calculate the phase gap between two positions.
The graphic scale of the phase is included between
±
180° but the measured value can be outside these limits. In this
case, we add to this value:
±
360°. This is a way of displaying all the values but sometimes it makes it difficult to use the
graphs. By holding down the mouse button in a graphic zone, you can drag this curve vertically.
Curve before sliding
Curve after sliding
4.5.2.1
Advanced analysis tools
ELI
O
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includes a high-performance tool palette that giving you the opportunity of analyzing directly on the touch
screen (without any computer support), all the data you have collected.
Click on one of the points of the curve. A window including a data analysis table appears. It contains several items of
information concerning the investigated signal.
F
1
Frequency stimulation
FREQ
Frequency in Hz
POWER
Power in nano Volt
PHASE
Phase shift in degrees
S/N
𝑆𝑖𝑔𝑛𝑎𝑙
𝑁𝑜𝑖𝑠𝑒
ratio in dB
