Argus 165, Руководство пользователя

Страница: 275 / 363

TDR status display:
Gain:
Range:
23 Copper tests
ARGUS 165
275
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ARGUS displays possible interference
sources on the copper twisted pair
directly.
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In this example, after the input pulse
(starting at 0 meters) we can see a second
pulse that spikes at approx. 150 m. This
can indicate a 150 m long line that is open
at its end.
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The adjustable range, the gain and the
graph functions permit more detailed
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analysis.
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To ensure optimum detection of pulse
reflections, match the function for adjust-
ing the gain (y-axis) with the reduction/
enlargement of the range shown (x-axis).
ARGUS always starts with the lowest gain
(-26 dB) at a range of 1500 meters.
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Gain-Y: Sets the gain
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from -26 dB, -20 dB, 0 dB, +14 dB
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+24 dB, +34 dB, +44 dB
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The measurements with the TDR can take
place in a measuring range of from 3.5 to
6000 meters. The resolution is approx. 0.3
% of the displayed measuring range.
The accuracy is approx. ±2 % of the
measuring range. When determining
the distance, try to determine the
start of a pulse where possible, and
not the relative maximum.
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Range-X: Sets the displayed
measuring range. Every press of
the cursor key halves or doubles
the displayed range.