RFmxWLAN OFDMModAcc Fetch MCS Index VI

Selector String specifies a selector string comprising of the signal name, result name, and user number. If you do not specify the signal name, the default signal instance is used. If you do not specify the result name, the default result instance is used. The default value is "user0".

Example:

"user0"

"signal::sig1/user0"

"signal::sig1/result::r1/user0"

"result::r1/user0"

You can use the RFmxWLAN Build User String VI to build the selector string.

Instrument Handle In specifies the RFmx session refnum. Instrument Handle In is obtained from the RFmxInstr Initialize NIRFSA VI or the RFmxInstr Initialize NIRFSA (Array) VI.

Timeout specifies the timeout for fetching the specified measurement. Set this value to an appropriate time, longer than expected for fetching the measurement. A value of -1 specifies that the VI waits until the measurement is complete. This value is expressed in seconds. The default value is 10.

error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

Instrument Handle Out passes a reference of your RFmx session to the next VI.

MCS Index returns the MCS index or the data rate. The MCS index or data rate for various standard signals are decoded as follows:

Standard	Field
802.11a, 802.11j, 802.11p	The data rate is decoded from the SIGNAL field.
802.11n	The MCS index is decoded from the HT-SIG field.
802.11ac	The MCS index is decoded from the VHT-SIG-A field.
802.11ax SU and Extended Range SU PPDU	The MCS index is decoded from the HE-SIG-A field.
802.11ax MU PPDU	The MCS index is decoded from the HE-SIG-B field.
802.11be MU PPDU	The MCS index is decoded from the EHT-SIG field.
802.11bn MU PPDU	The MCS index is decoded from the UHR-SIG field.
802.11bn ELR PPDU	The MCS index is decoded from the ELR-SIG field.

For 802.11a, 802.11j, and 802.11p signals, the following MCS indices corresponds to their data rates:

MCS	Data Rate
0	1.5 Mbps, 3 Mbps, and 6 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.
1	2.25 Mbps, 4.5 Mbps, and 9 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.
2	3 Mbps, 6 Mbps, and 12 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.
3	4.5 Mbps, 9 Mbps, and 18 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.
4	6 Mbps, 12 Mbps, and 24 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.
5	9 Mbps, 18 Mbps, and 36 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.
6	12 Mbps, 24 Mbps, and 48 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.
7	13.5 Mbps, 27 Mbps, and 54 Mbps for channel bandwidths of 5 MHz, 10 MHz, and 20 MHz, respectively.

error out contains error information. This output provides standard error out functionality.