Chapter 1
Overview
Menu fields
4460 GSM System Option and 4468 EDGE System Option
Version 12.20
27
The bar display
The bar display is used to display measurement results that are obtained by
running a specific test a certain number of times. It shows a couple of important
values on a relatively small area:
– The large
white area
indicates the range between the lower and the upper
limit of the specific test.
– The
dark gray
section within the white area shows the range of all measure-
ment values obtained from the minimum to the maximum.
– The small
orange rectangle
marks the average value.
– The two
limit violation indicators
are white as long as no violations of the
test limits occur.
– As soon as a measurement value obtained is smaller than the lower limit,
the lower limit violation indicator will turn to red.
– The same will happen with the upper limit violation indicator when a
measurement value exceeds the acceptable range.
Display Markers
For easy reading of its graphical live displays, the 4400 offers two display
markers. These are vertical lines that allow to take measurements at specific
positions (e.g. in a spectrum live display) or to determine distances between
specific points (e.g. the length of a burst in a TDMA-based system).
On the entry fields, you set the markers to the required horizontal positions (kHz
in the example above). The corresponding result fields (dBm in the example
above) show the measurement values obtained for the two positions.
The third row shows the difference between the horizontal positions selected
and the difference between the two corresponding measurement values.
NOTE
To reinitialize the statistics, push the
Reset
softkey.
