Search Time (802.11a/g/j/p OFDM)

Menu Path: Trace > Data > Channel X > Search Time where X is the selected channel.

Search Time trace is the resampled and time adjusted input data (Raw Main Time) used by the pulse search algorithm to find the measurement OFDM Orthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. burst. The Search Length parameter specifies the amount of data to include in the Search Time. The start of the Search Time trace is set to the trigger location (which corresponds to 0 seconds in Raw Main Time), however the time scale is shifted such that 0 seconds corresponds to the start of the first payload data symbol after preamble.

VSA signal flow

Search time data is the resampled and time corrected data before Digital Demodulation, see Measurement hardware's signal flow (see Digital Demodulation Block Diagram):

See Also

Search Length

Result Length

Time trace

Raw Main Time trace

Available Trace Data (802.11a/g/j/p OFDM)