sebaKMT Easyflex Com, Инструкция по эксплуатации

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38 MAN_Easyflex_com_eng_01.doc
The direction of the pulse at the beginning of the ”Split Pairs” section may
be positive or negative depending on the direction in which the wires have
been connected to the device. At the end of the ”Split-Pairs” section the
reflection is always inverted as compared with its beginning.
3.8.7 How to Use the Marker
If you use only the cursor you can just determine the distance from the
Easyflex Com
to the point of reflection in the cable. The marker offers you
additional means to set a point of reference in the cable and to take
measurements in relation to this point by means of the cursor. We
recommend to use the marker
•
when subtracting the laught of the test leads,
•
when the length of a cable section has to be measured (in particular
when a cable is composed of sections with differing NVP /
v
/
2
values),
•
for measurements in relation to a known point of reference (this will
increase measuring accuracy), and
•
for determining the NVP /
v
/
2
value of a cable section of known length.
Press key Mark to set or erase the marker. To this end press key Cursor
and move the vertical line by means of the rotary encoder to the desired
point of reference. Then press key Mark; the marker will now be displayed
as a vertical dotted line. When you subsequently use the rotary encoder to
move the cursor away from the marked position, the numerical values on
display top right will change. The numerical value behind Cursor indicates
the distance between the output of the
Easyflex Com
and the position of the
cursor whereas the numerical value behind
∆
indicates the distance
between the marked point of reference and the cursor position. Pressing
key Mark one more time will erase the marker. The marker cannot be set to
position 0 m.