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Chapter 5 141
CDMA Measurements - Screens and Control Fields
CDMA Measurements
Fast Power
Fast power is a faster method of measuring code domain power. A value
for Time Offset must be transferred from a non-fast power
measurement before fast measurements begin, or when changes to any
of the following fields occur: Data Rate, PN Offset, CDMA TB, Synth
Ref.
See “Ofs Trnsfer” on page 164 for more information.
The number of measurement averages can be entered in the Num Avgs
field on the FP Setup menu. This number is used to calculate and
display successive code domain power measurements.
Screens on which this measurement is displayed
• CODE DOM (Code Domain Analyzer)
Code Domain Timing (Timing)
Code domain timing is the difference in time between pilot (Walsh 0)
and other Walsh codes with the same forward CDMA channel. In the
CODE DOM screen, this measurement is indicated as positive or
negative bar with the size of the bar indicating how far ahead or behind
the other Walsh channels are relative to the pilot. Signals above the
reference are leading in time; signals below the reference are lagging.
(See Figure 5-8 on page 142.)
Screens on which this measurement is displayed
• CODE DOM (Code Domain Analyzer, IS-95 only)
Code Domain Phase (Phse)
Code domain phase is the difference in phase between the pilot and
other code channels (Walsh codes) within the same forward CDMA
channel. It displays the phase error for each of the 64 Walsh channels
relative to the pilot channel (Walsh 0). This measurement is indicated
as positive or negative bars on the Test Set's CODE DOM screen. The
size of the bar indicates how much the phase of other Walsh codes lead
or lag the pilot. Signals above the reference are leading in phase;
signals below the reference are lagging.