Search Length (DOCSIS 4.0 Upstream)

Default: Auto

Search Length specifies the amount or length of Search Time input data that is included in the measurement frame search. The frame search algorithm searches within the entire search length to find the first complete frame that can be demodulated and analyzed. The frame can occur anywhere within the Search Length.

Format tab parameters that affect search length are as follows:

Initial Settings set to Auto - assumes worst-case FFT Length (4k) and Cyclic Prefix (640 Tsd)
FFT Length - affects symbol length
Cyclic Prefix - affects symbol length

The Meas Setup > Time > Main Time Length Time parameter is not available (disabled) when the VSA is in modulation analysis mode.