Agilent Technologies 8935 series e6380a manual Fast Power, Code Domain Timing Timing

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 theTest 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.

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