About Channel 1 CDP Trace Data (1xEVDO)
CDP trace data provides composite and code layer Code Domain Power and Code Domain Error trace data results. Code Domain Power (CDP) is an analysis of the distribution of signal power across the set of code channels normalized to the total signal power.
CDP Composite trace data results are computed from data specified by the Measurement Interval and Offset parameters. The forward link CDP composite results are for the specified Analysis Channel (see Analysis Channel parameter). When Preamble is selected by Analysis Channel, CDP measurements only exist for cases where the preamble length is detected to be 1024 chips.
CDE Composite, reverse link, trace data results are computed from the first measured half (0.5) slot. There are no CDE forward link trace results.
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CDP Composite Trace Data: This is the CDP (Code Domain Power) and CDE (Code Domain Error) trace data result for the composite signal. Composite trace data results are derived from data for the total signal. This includes the combined data from all Walsh Code Lengths (or Symbol Rates) and Walsh Code Numbers.
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CDP Layer Trace Data: This is the CDP (Code Domain Power) and CDE (Code Domain Error) trace data results for a specified code layer. You use the CDP Layer drop down list to specify the code layer ( tab).
You can view CDP as absolute power by clearing the IQ Normalize check box ( tab).
Display Format
The data is shown in a multi-color format that assigns a unique color to each code layer and related active code channels. This makes it easy to visually identify and distinguish the active code channels (Walsh Code Number) for a given code layer (Walsh Code Length). The colors are also user definable (see Display Preferences > Color tab).
For CDP and CDE trace data displays with separate I/Q channel trace bars, to position the Marker to the desired Code Layer/Channel bar, you must click in close proximity to the horizontal bar that indicates the value of the code channel being measured.
Available Channel 1 CDP Trace Data
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† Reverse link direction only |
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See Also
