3 Copper tests
54
ARGUS Copper Test Manual
Measuring range:
When the TDR function starts, it is in the measuring range in the status display. You can
set the range (x) and the gain (y) in the measuring range. If you have hidden the measuring
range in order to work with the cursor or zoom, you can restore it:
Pulse width
The pulse width setting can be used to appropriately configure the pulse that the ARGUS
sends to the line.
The pulse width sets the duration of the pulse ARGUS outputs to the line in nanoseconds
(ns). The default value is
500 ns
, but you can increase this up to 2000 ns (2 μs) depending
on the measuring range. Just like a more powerful pulse, a longer pulse contains more
energy, and thus is generally more suitable for use on longer lines. However, a longer
pulse can also conceal important reflections, which can then no longer be correctly inter-
preted.
Wire type/VoP:
The absolute VoP value must always be less than 1. However, ARGUS always displays
this in percent. In a wire with a VoP value of 0.7, a signal propagates at 70 % of the speed
of light (c
0
).
For many cable types, the pulse time is also specified in V/2: V/2 = VoP [%] * 1.5.
Averaging:
Determination of the average value based on the specified value (Min= 1, Max= 20).
Reference curve:
The reference curve is used, for example, to compare the signal of one line with the signal
of another line.
For this purpose, start the line monitor and connect it to line a. If you have the desired
reference signal by setting the measuring range in the display, you set the curve. Now,
without terminating the line monitor, switch to line b and compare both signals with each
other.
If the stop function is activated, the cursor can be moved with greater speed.
<Menu>
or
Restores the measuring range.
To measure e.g. building wiring precisely, it is important to set the correct VoP
value. You can determine the correct VoP using a reference cable of known
length before the measurement.
