Marker (Trace Data)

There are two Marker trace data results that correspond to the "occupied bandwidth" OBW Occupied bandwidth is closely related to channel power. It indicates how much frequency spectrum is covered by some given percentage (often 99%) of the total power of the modulated signal. marker and the "adjacent channel power" ACP Adjacent Channel Power: The power from a modulated communications channel that leaks into an adjacent channel. This leakage is usually specified as a ratio to the power in the main channel, but is sometimes an absolute power. Marker.

OBW marker - OBW Summary table

Menu Path: Trace > Data > Marker > Trace X > OBW Summary where X is the trace letter

The OBW marker provides an OBW Summary table. The OBW Summary table provides a complete set of occupied bandwidth measurement data results including the occupied bandwidth, the OBW Power, the Power Ratio (OBW power/Total power), the Upper Frequency, the Lower Frequency, the Centroid Frequency, and the Offset Frequency.

For more information, see OBW Summary Table topic.

ACP marker - ACP Summary table

Menu Path: Trace > Data > Marker > Trace X > ACP Summary where X is the trace letter

The ACP marker function provides an ACP Summary table trace data result. The ACP Summary results are derived from the ACP marker on the corresponding trace. The ACP Summary table provides a complete set of measurement results including the reference channels bandwidth and power, and the adjacent (upper and lower) channels offset frequency, bandwidths, ACP, ACPR Adjacent Channel Power Ratio - A measurement of the amount of interference, or power, in the adjacent frequency channel. ACPR is usually defined as the ratio of the average power in the adjacent frequency channel (or offset) to the average power in the transmitted frequency channel. ACPR is a critical measurement for CDMA transmitters and their components. It describes the amount of distortion generated due to nonlinearities in RF components. The ACPR measurement is not part of the cdmaOne standard., and maximum upper or lower adjacent channel ACPR for each adjacent channel included in the measurement.

For more information, see ACP Summary Table topic.