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8
Pulse length:
Select the desired pulse length with the
left / right
arrow keys.
If the TDR range is adjusted, the transmission time of the pulse changes. The
pulse length must be increased so that the device can overcome signal atte-
nuation and continue to record the length of the cable. The larger the range
selected on the TDR, the wider the transmitted pulse.
Z:
The impedance is a characteristic of the cable to be tested. The desired
impedance is selected with the
left / right
arrow keys (the cable impedance is
determined automatically in the AUTO test).
TDR Menu
Short pressing of the
SEL
key al-
lows scrolling through the different
functions of the
up / down
control
keys.
1. Length:
Selection of length ranges from 0 to approx. 14,000 metres
2. Y Zoom:
Enlarges the view of the measuring range in 6 dB increments
3. X Zoom:
Enlarges the view of the measurement window
4. Cursor:
Fade in the cursor. To move quickly, hold down the
left / right
con-
trol keys. The
up
key is used to display the second cursor; the inactive cursor
changes its colour to black.
Further cursor modes:
1x :
C1 Absolute position of cursor 1, cursor 1 is active
2x :
C2 Absolute position of cursor 2, cursor 2 is active
3x :
ΔC1 Difference between cursor 1 and 2, cursor 1 is active
4x :
ΔC2 Difference between cursor 1 und 2, cursor 2 is active
This function can be used to measure two reflection points, e.g. the distance
between two distributors, joints or distr defect.
C1:40.2m
0.67
Cursor
0m
150 ~
300m
