BIRD SITE ANALYZER SA-1700EX, Руководство по эксплуатации

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Bird Site Analyzer
152
Markers
Markers are used to show the exact value at one point
on the graph. In Measure Match and Cable Loss
modes, the marker displays the frequency and loss (or
VSWR). In Fault Location mode, the marker displays
the distance and loss.
Run / Hold
When HOLD is displayed, the unit makes a new
sweep every few seconds, and displays the latest
sweep.
When RUN is displayed, the unit will only make a sin-
gle sweep. The display will not update if the Site Ana-
lyzer is disconnected or if the cable is jiggled. This is
usually preferred.
Equations
Fault Location
Resolution
where C = speed of light (300 x 10
6
m / sec) or
(9.84252 x 10
8
feet / sec)
Maximum Distance
Fault Location Distance Tables
The tables on the next pages will help you select the
frequency span, measurable distance, and resolution
for fault location measurements. Select the table for
Resolution
C
freq span 2
×
------------------------------- =
Max distance resolution data points 1 –
( ) ×
=