Tektronix SPECMON3 Manual page 362

Analyzing Data
Setting
Analysis Offset
Auto
Analysis Length
Auto
Time Zero Reference
Actual
xxx
Analysis Offset
Use analysis offset to specify where measurements begin. Range: 0 to [(end of acquisition) - Analysis
Length)]. Resolution: 1 effective sample (or symbol).
Analysis Length
Use the analysis length to specify how long a period of time is analyzed by a measurement. After you
enter a value, this box changes to show the actual value in use, which is constrained by Acquisition Time.
This setting is not available when Auto is checked. Range: minimum value depends on modulation type
to Acquisition Length. Resolution: 1 effective sample (or symbol).
Time Zero Reference
The analysis offset is measured from this point. Choices are: Acquisition Start or Trigger Point.
Parameter
Acquisition Start
Trigger Point
xxx
350
Description
Specifies the location of the first time sample to use in measurements.
When enabled, causes the instrument to set the Analysis Offset value based on the
requirements of the selected display.
Specifies the length of time to use in measurements.
When enabled, causes the instrument to set the Analysis Length value based on the
requirements of the selected display.
Specifies the zero point for the analysis time.
This is a displayed value, not a setting. It is the Analysis Length (time) being used by the
analyzer; this value may not match the Analysis Length requested (in manual mode).
Description
Offset is measured from the point at which acquisition begins.
Offset is measured from the trigger point.
SPECMON3 & SPECMON6 Printable Help
Analysis Time Tab