CDE Layer (W-CDMA(3GPP)/HSPA)

CDE Layer trace shows the channel power error values for each Code Channel within the specified code layer (Spread Code Length). The CDE of a particular Code Channel is a measure of the error power in a Code Channel relative to the total signal power.

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CDE Layer trace data results are computed only from the first measured Slot after the Measurement Offset.

MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas. Measurements ( only): There is a seperate trace result for each measurement Antenna (x).

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 Channel for a given code layer (Spread 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, click in close proximity to the horizontal bar that indicates the value of the Code Channel being measured.

Selecting a Code Layer

Select the desired code layer by selecting a Spread Code Length from the CDP Layer - Spread Code Length drop-down list (MeasSetup > W-CDMA(3GPP)/HSPA Demod Properties > Channel/Layer tab).