Offset (Custom IQ)

The VSA specifies an offset, in symbols, when sync search is used. The offset determines the location of Result Length within Search Length.

A positive or negative offset can be specified. If the pattern occurs before the start of Result Length, specify a negative offset. If it occurs after the start of Result Length, specify a positive offset.

The user can change the offset value after the measurement is complete.

Minimum and Maximum Offset

The minimum and maximum offsets entered depend on these parameters:

Search Length
Result Length
Search Pattern

Basically, any offset can be entered such that the Result Length falls within the Search Length. Increasing any of these parameters affects the maximum positive or negative offset that can be entered as follows:

Increasing Search Length increases the maximum positive or negative offset that can be entered.
Increasing Result Length decreases the maximum negative offset that can be entered but has no effect on the maximum positive offset.
Increasing the length of the Search Pattern decreases the maximum positive offset that can be entered but has no effect on the maximum negative offset.