Search Time (802.11b/g DSSS/CCK/PBCC)

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

When 802.11b/g DSSS Direct sequence spread spectrum. The data transmission scheme (sometimes referred to as a "'modulation" scheme) used in 802.11b WLANs. DSSS uses a radio transmitter operating at a fixed centre frequency, but using a relatively broad range of frequencies, to spread data transmissions over a fixed range of the frequency band. 802.11a and 802.11g (when not operating in 802.11b mode) use Orthogonal Frequency Division Multiplexing (OFDM)./CCK complementary code keying/PBCC packet binary convolutional code Demodulation is enabled, the Search Time trace shows time-data before pulse search and demodulation. This is the acquired time data used to search for the pulse (or burst). The value of Search Length determines the length of the Search Time trace.

VSA signal flow (see Digital Demodulation Block Diagram):

image\blk_searchTime_OFDM_wmf.jpg

See Also

Available Trace Data (802.11b/g DSSS/CCK/PBCC)