N9077EM1E WLAN 802.11ac/ax Measurement Application

• Added PSDU Length result in User Info Summary trace (2025.0501)

• Added support for fast mode EVM optimization for N9040B (2025.0501)

• Fixed issue that required Optimize EVM to be executed twice on N9041B to get good results (XSA-49729)

• Fixed issue that caused Detect Non-HT to not be enabled (XSA-47745)

• In Modulation Analysis measurement, added support for a new EVM Floor Extension method “IQ Noise Correction (IQ-NC)” to the N9032B PXA and N9042B UXA for improving EVM noise floor performance, with a longer acquisition length to capture multiple WLAN bursts. To use IQ-NC EVM, you must execute “Characterize Noise Floor for IQ measurement” under the System: Alignment: Advanced menu, with NF2 (Noise Floor Extension) license. (2024.0801)

• In Modulation Analysis measurement, added SCPI remote command-only support for allowing Fast Mode for EVM Optimization with the Optimization method = Normal that manually sets input power level and bypasses power acquisition at the test port

• In Modulation Analysis measurement, restored once removed 4096QAM demod support (in A.38.xx) back with N9077EM1E/2E (and N9077EM3E/4E) licenses because of clearance of IVL (2024.0801)

• Fixed issue causing Spectral Flatness to not be able to demod 4096QAM signal when the correct license is installed (XSA-46595)

• Removed support of higher order >1024 QAM Modulation Analysis capability (IVL restricted)

• Fixed issue with Edit RU Allocation dialog menu being too wide for displays of 4U-high analyzers (e.g. CXA, EXA, MXA, PXA); displays of 6U-high analyzer such as UXA are OK (XSA-41295)

• Support EVM optimization look-up table for N9042B UXA with V3050A Signal Analyzer Frequency Extender

• Reconstructed Edit RU Allocation dialog menu for 802.11ax

• Fixed issue causing demodulation of only one active RU26 do not work after upgrading to A.36.xx (XSA-38144)

• In Modulation Analysis measurement for 802.11ax, added support for HE (High Efficiency) Masked HE-LTF (High Efficiency Long Training Field) mode (2023.0801)

• In SEM measurement for 802.11ax, 80 / 160 MHz bandwidth to support HE (High Efficiency) Preamble Puncture mask setting (2023.0801)

• Fixed issue that caused the Gate Polarity value set in other measurements to not be applied to the Monitor Spectrum measurement (XSA-30900)

• Corrected Offset Limit settings in SEM measurement for 802.11ac preset values (XSA-35797)

• In Modulation Analysis measurement, corrected the data rate for 802.11p 10 MHz when Radio Standard is Auto (XSA-34241)

• Modulation Format preset to “SIG Syms”

• Meas Interval preset to 16 symbols (instead of 60 symbols)

• Result Length and Max Result Length preset to 16 symbols (instead of 60 symbols)

• Symbol Clock Error Compensation coupling setting to OFF when switching to 802.11ac; ON when switching to 802.11ax

• Used common name for 802.11ax/be Demod Info file template for manual RU allocation configuration

• Added a new demod parameter “Min Idle Time” for Burst Detect Window Length, to handle signals with less than 1us idle part (2023.0301)

• Added new setting of Power Reference Plane to switch RF and Baseband in WLAN. Requires license for N9030B-BBA or N9020B-BBA, as appropriate

• Supported non-HT duplication mode in preamble puncture PPDU (2023.0301)

• Added cross-correlated EVM (ccEVM) on 2x N9021B MXA, 2x N9030B PXA, and 2x N9032B PXA signal analyzers (2022.1201)

• Added support of look-up table method for Optimize EVM on N9021B MXA analyzers with Opt 532, 544, or 550 (2022.1201)

• Support EVM calculation using ideal reference signal

• Support ccEVM (Cross-Correlated EVM) with two N9042B UXA analyzers for better EVM floor

• Support WLAN 11be EHT 320MHz Gamma phase rotation

• Redesign U-SIG and EHT-SIG info for 802.11be 320 MHz signals

• IEEE 802.11a/b/g and 802.11n/ac/ax

  • Support non-HT duplicated signal as auto detection (802.11ax)

  • Support data decoding and CRC (802.11a/n/ac/af)

• Common to 802.11

  • Optimize EVM with new “iteration” method

  • Display speed improvement for IQ Polar diagram

  • Support Burst Info view with per-symbol power (802.11a)

• Improved Optimize EVM feature to work better on an analyzer that does not have a preamp option

• Fixed issue in Modulation Analysis measurement that resulted in the Trigger Holdoff feature to not operate properly when Holdoff Type is set to Above or Below (XSA-24198)

• Fixed issue in Modulation Analysis (EVM) measurement that resulted in a crash when an auto-saved view was being either saved or recalled (XSA-20938)

• Fixed issue in CCDF measurement that caused the Gaussian trace to disappear when switching to other measurement such as Channel Power or ACP and then returning to CCDF. This is GUI-only issue; remote operation is OK (XSA-12133)

• Auto-detection of WLAN formats including 802.11b (non-OFDM) and new 802.11be

• Support 802.11be spectral flatness measurement

• Support 802.11be User Information in EHT-SIG & Common Field

• Speed improvement with SEM measurement

• Changed default filter type for Waveform measurement to Flattop (XSA-19070)

• Fixed issue that caused the Optimize EVM to yield different results on PXA (XSA-14247)

• Added help for Auto Leveling feature in Modulation Analysis measurement (XSA-109)

• Added support for External Trigger 3 for WLAN EVM measurements

• Added ability for Optimize EVM feature to take advantage of Option FBP, Full Bypass Path, on PXA

• Fixed issue that caused Execution Error to appear when activating Subcarrier I/Q Estimation when Radio Standard is 802.11ac or 802.11ax (XSA-9468)

• NEW on N9021B MXA Signal Analyzer

• Added ability to perform one FFT using Wideband IF (Opt B85, B1A, B1X, B2X, B5X, and H1G) for SEM measurement

• Fixed issue causing XSA application to crash when changing modulation format of the input signal (XSA-5497)

• Added Power over Time/Symbol to EVM measurement

• Added support for 4096QAM demodulation for 802.11ax

• Fixed issue to handle case when both DCM and STBC equal 1 (XSA-5267)

• Fixed issue that caused Adjust Atten for Min Clip to not always set the attenuation correctly on wideband digital signals (XSA-552)

• Fixed issue with PSD Limits not changing to reflect change in PSD Units (XSA-917)

• Fixed issue with Optimize EVM that caused WLAN EVM measurements in UXA to be degraded when upgraded to A.24.58 (XSA-3950)

• Fixed issue that caused “Full Bypass Enabled” warning message to not disappear when it should (XSA-918)

• Supported 80 MHz + 80 MHz decoding, plus other enhancements

• Fixed issue in 802.11ax measurement where the CRC flag was set to fail rather than invalid, since all users are inactive (519039)

• Fixed issue in 802.11ax Modulation Analysis measurement that was preventing getting SIG-B length information as 80+80MHz format (520405)

• Fixed issue in Modulation Analysis measurement that caused “demod error” to be reported when measuring a single burst with only one symbol (527357)

• Fixed issue in Modulation Analysis measurement that caused OFDM Signal and OFDM Data demod bits to be the same (525650)

• Enhanced Optimize EVM algorithm to properly handle case when internal preamp is not available (522081)

• Fixed saving Measurement Data on Spurious Emissions measurement (522161)

• Added Per User CRC check for 802.11ax

• In Modulation Analysis measurement, updated EVM and Symbol Clock Error Pass/Fail limit values due to IEEE 802.11ax draft 2.2 revision

NOTE:

A.20.22 fixes the defect found in instrument software versions A.20.03 and A.20.04 that caused measurement accuracy issues. Any analyzer running A.20.03 or A.20.04 should be upgraded to A.20.22 or later.

NEW

• L-SIG symbol (4-bit rate & 12-bit length) support to Single Info trace

• CPE degree result in IQ polar numeric result trace

• Packet Extension duration into SIG-A window in Burst Info view