Specifies the LTF symbol size. This property is applicable only for 802.11ax, 802.11be, and 802.11bn signals.

For 802.11ax TB PPDU, 802.11be TB PPDU, and 802.11bn TB PPDU, you must always configure this property. For other signals, you must configure this property only when the OFDM Header Decoding Enabled property is set to False.

You do not need to use a selector string to configure or read this property for the default signal instance. Refer to the Selector Strings topic for information about the string syntax for named signals.

The valid combinations of LTF size and guard interval type are given in the following table.

PPDU Type Property Value LTF Size Property Value Guard Interval Type Property Value
SU PPDU, Extended Range SU PPDU 4x 1/4
SU PPDU, Extended Range SU PPDU 2x 1/8
SU PPDU, Extended Range SU PPDU 4x, 2x, 1x 1/16
MU PPDU 4x 1/4
MU PPDU 2x 1/8
MU PPDU 4x, 2x 1/16
TB PPDU 4x 1/4
TB PPDU 2x, 1x 1/8
ELR PPDU 2x 1/8

The default value is 4x.

Remarks

The following table lists the characteristics of this property.

Short Name OFDM LTF Size
Data type ci32.png
Permissions Read/Write
High-level VIs N/A
Resettable Yes
4x 0

Specifies that the LTF symbol size is 4x.

2x 1

Specifies that the LTF symbol size is 2x.

1x 2

Specifies that the LTF symbol size is 1x.