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

CDP Layer shows the Code Domain Power trace data for all Code Channels within the specified code layer (Spread Code Length). If the Measurement Interval is greater than one, all Slots within the Measurement Interval are averaged together to produce the CDP Layer results.

CDP 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 in the CDP Layer -Spread Code Length drop-down list (MeasSetup > W-CDMA(3GPP)/HSPA Demod Properties > Channel/Layer tab).