9
There are two cursors on the TDR screen, between them the distance is measured on the trace.
To make a cursor an active – press the
◄►
keys. To vertical move a trace – press the
▲▼
key.
To operate with the trace gauges use the following keys: [PULSE], [RANGE],
[AMPLIFICATION]. At setting the viewing range the device select itself he measuring pulse
width. The [STRETCHING] key is used to view the detail trace around an active cursor (ZOOM).
The [MAP] key is used to view the whole cable. The [AVERAGING] key is used to eliminate
the occasional noises and to rice picture stability during the increasing the averaging.
The keys on the left vertical part of the menu are changing the TDR working mode: trace
recording [RFG storage], [SCREEN] - activation of the logged trace for the comparison [+
memory]; [INPUTS] - work in separate or common mode; [AMPLITUDE] - adjusted pulse
amplitude, [DENOISE] - the mode of wavelet smoothing for a line with intensive noise.
INSTALLATION FOR A DISTANCE MEASUREMENT
If you does not choose the cable and work with default cable - it is necessary to establish VF (or
CC) and a range of a cable viewing. The distance between cursors will be calculated according
to VF in selected view range.
If the VF is unknown, the device will establish it on a Cable Type. For this purpose select e
necessary mark in Main Men \ Cable selection \ Cable Type.
MEASUREMENT OF THE DISTANCE
Measurement of the distance must be made after setting of VF (or CC) or selecting of a cable
from the List.
Measurement of distance is always carried out between two cursors. For measurement of the
distance from the cable beginning to heterogeneity it is necessary a to make a zero cursor
become an active. Above the zero cursor there should be a label. If there is no label, press
[
ОК
] - and label will appear above the zero cursor. Establish the cursor on the beginning of
a measuring pulse by the
◄►
keys. Then pressing the [
ОК
] key switch to the measuring
cursor and establish it on the beginning of the re
fl
ected pulse. Cursors should be established
on the pulse beginning, instead of on a maximum (top) of a pulse. For more exact positioning
of the cursors it is recommended to use the zoom - [STRETCHING] key.
