Keysight M9421A - Page 832

3 WLAN Mode
3.6 Modulation Analysis Measurement
Index: n Results Returned
If radio standard is 11ah and PPDU format is greater than or equal to 2 MHz short format, returns the decode
bits of SIG fields which length is 48 bits
If radio standard is 11ah and PPDU format is 1MHz short format, returns the decode bits of SIG fields which
length is 36 bits
If radio standard is 11af, returns the decode bits of VHT-SIG-A and VHT_SIG_B Signal. The trace length is 48
+ 27
If radio standard is 11ax, returns the decoded bits of HE-SIG-A. The trace length is 52
If radio standard is 11be, returns the decoded bits of U-SIG
The trace length is 52 for 11be 20M/40M/80M
The trace length is 104 for 11be 160M
The trace length is 208 for 11be 320M
Else, return -999.0
11 Returns the decode bits of L-SIG Signal
12 Preamble Freq Error vs. Time returns the total frequency error during the preamble portion of the OFDM
burst
19 IQ gain imbalance vs. Carrier trace returns series of floating-point numbers (in dB) that represent each
sample in the IQ gain imbalance vs. Carrier trace
20 IQ quadrature error vs. Carrier trace returns series of floating-point numbers (in deg) that represent each
sample in the IQ quadrature error vs. Carrier trace
21 For EXM E6640A / EXF E6650A
Tx Beam Forming Calibrated Angle Error returns series of floating-point numbers (in rad) that represent the
calibrated angle error vectors on channels, when
–
Radio Std is 802.11n (20 MHz), or 802.11n (40 MHz), and MIMO Tx Channel Count ≤ 4
–
Radio Std is 802.11ac(20MHz), 802.11ac(40MHz), 802.11ac(80MHz), or 802.11ac(160MHz), and MIMO
Tx Channel Count ≤ 8
–
MIMO Usage Type is TXBForming (available when license V9077B-KFP/KTP is installed)
Otherwise, returns -999.0
The first channel angle vector is used as reference; the angle error vectors are listed in order of channels
For the 20MHz BW signals, each channel’s angle error vector contains 64 values;
For the 40MHz BW signals, each channels angle error vector contains 128 values; For the 80MHz BW
signals, each channels angle error vector contains 256 values;
For 160MHz BW signals, each channels angle error vector contains 512 values
22 For EXM E6640A / EXF E6650A
Tx Beam Forming Gain returns gain after the calibrated angle error vector are compensated for the MIMO
input signal, when
–
Radio Std is 802.11n (20 MHz), or 802.11n (40 MHz), and MIMO Tx Channel Count <= 4
–
Radio Std is 802.11ac(20MHz), 802.11ac(40MHz), 802.11ac(80MHz), or 802.11ac(160MHz), and MIMO
Tx Channel Count <= 8
WLAN Mode User's &Programmer's Reference 832