258 Chapter4
Key Function Descriptions
Key Descriptions
The excursion values range from 0 dB to 30 dB in log
mode, and 0.1 to 10.0 divisions in linear mode. The
default value is 6 dB.
Any portion of a peak that falls below the peak
threshold is also used to satisfy the peak excursion
criteria. For example, when the peak excursion is equal
to 6 dB, a peak that is equal to 3 dB above the peak
threshold will be found if the peak extends an
additional 3 dB or more below the threshold.
Front-panel key access:
PEAK SEARCH
Figure 4-5 PEAK EXCURSN defines the peaks on a trace.
PEAK METHOD Makes adjacent channel power (ACP) measurements
using peak power integration. This is a method that
measures the power in the main and adjacent channels.
It differs from the analog method because it uses
positive peak detection, allowing the measurement of
burst carriers. The power, not the log of the power, of
each measurement cell is added. For this method, the
sweep time is set to 600 times the burst period. There
are 600 measurement cells per sweep, so this sets one
burst RF cycle per measurement cell. This method
supports 1993 MKK standards for PDC systems and
1993 RCR standards for PHP systems.
Front-panel key access:
MEAS/USER
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