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Reference
3-30 GB1400 User Manual
How TOTALIZE Results are Measured
Totalize results are measured continuously by the Analyzer. Totalize results can
be cleared by the user (by pressing the CLEAR key when Totalize results are
displayed). However, Totalize result accumulation is a continuous background
process of the Analyzer and cannot be suspended by the user. The Totalize
measurement process is illustrated in the figure below.
CLEAR
Untimed
Measurement Interval
TOTALIZE Process is continuous,
but results may be cleared by the
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Figure 3-4. The TOTALIZE Measurement Process
How WINDOW Results Are Measured
Window Mode results are calculated over a sliding window whose length is
defined by the user. Window results can be cleared at any time by pressing the
CLEAR key when Window Mode results are displayed. But as in the case of
Totalize results, the Window measurement process cannot be suspended by the
user.
Window results may be thought of as a series of snapshots of the received signal
performance. Each snapshot indicates BER and total bit errors over the most
recent interval T, where T is the value of the Window length set by the user. The
amount of "slide" between snapshots is effectively determined by the display
update rate which is about five times per second. Therefore the Window slide
between display updates is about 200 ms. Note that End-of-Window reports are
generated once per second so the effective window slide in printed results is one
second. The Window measurement process is illustrated in following figure.