Time Parameters (6GR)

These parameters on the Time tab control which portion of the acquired signal is analyzed. All are auto-coupled (see Auto and Manual Parameter Coupling), except System Sample Frequency, which is a reported value.

Result Length - Sets the length of the analyzed result, in subframes.

Default: 10 subframes

Range: 0 to 250 subframes

Result Length Add. Slots - Extends the result length by a number of additional slots beyond the whole subframes set by Result Length.

Default: 0 slots

Range: 0 to 8000 slots

Acquisition Mode - Determines the amount of data acquired in the measurement.

Normal - Acquires enough data to determine the Analysis Start Boundary and to handle arbitrary alignment of the input data with the carrier definition.
Reduced acquisition length - Reduces the acquisition length. This mode may fail to synchronize in some scenarios unless hardware triggering is used.
Frame trigger is present - Reduces the acquisition length; requires a hardware trigger aligned with the start of the carrier definition (within the Trigger Margin).
Slot trigger is present - Reduces the acquisition length; requires a hardware trigger aligned with the start of the specified slot (within the Trigger Margin). Selecting this mode forces Analysis Start Boundary to Slot.

Default: Normal

Choices: Normal, Reduced acquisition length, Frame trigger is present, Slot trigger is present

Analysis Start Boundary - Sets the signal boundary at which analysis begins.

Default: Frame

Choices: Frame, Half-frame, Subframe, Slot

First Slot Index - Sets the index of the first analyzed slot.

Default: 0

Range: 0 to a maximum that depends on the frame numerology

Subframe / Symbol Offset - One row holding two values that together offset the start of the analysis from the Analysis Start Boundary. Subframe Offset offsets by whole subframes; Symbol Offset offsets by symbols on top of that.

Default: Auto — 0 for both

Range: subframe offset 0 to (Result Length minus 1); symbol offset 0 to a maximum that depends on the numerology (symbols per subframe)

Subframe / Symbol Interval - One row holding two values that together set how much of the signal is analyzed. Subframe Interval sets the number of whole subframes; Symbol Interval adds symbols on top of that.

Default: Auto — the interval reaches the end of Result Length

Range: subframe interval 0 to Result Length subframes; symbol interval 0 to a maximum that depends on the numerology

System Sample Frequency - (Read-only) Reports the sample frequency the measurement is using. The value is derived from the carrier configuration — for example, a 40 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second. carrier gives 61.44 MHz and a 100 MHz carrier gives 122.88 MHz.

System Rate Scale Factor - Scales the system rate relative to its nominal value.

Default: 1

Range: 0.001 to 1000

Trigger Margin - Sets the trigger uncertainty range used when Acquisition Mode is Frame trigger is present or Slot trigger is present. As long as the real boundary is within +/- this range of the external trigger, the measurement can synchronize with the signal. This parameter is only available in those two acquisition modes.

Default: 50 µs