Note: This software version is a baseline version update. The firmware must be upgraded at the same time. The firmware version must meet any one of the following requirements:
SAStudio4 4.4.55.64 (29/09/2026)
1. N45 R5, N60 R5, M60 R5, M80 R5, E90 R3, E200 R3, E200 R4, N400 R2V2: FPGA: 0.55.30, MCU: 0.55.67, BUS: 0.55.8
2. N45 R6, N60 R6, N90 R0: FPGA: 0.55.104, MCU: 0.55.109, BUS: 0.55.8, PMU: 1.15, AGU: 1.5
3. W200: FPGA: 0.55.89, MCU: 0.55.9, BUS: 0.55.8, PMU: 1.15
feat：
1. Added support for W200 and N91 series products.
2. Added support for IQ data recording at a 625 MSps sampling rate.
3. Added external mixing functionality.
4. Added phase demodulation and single-sideband demodulation (USB/LSB) to IQS analog demodulation.
5. Added 16-bit sampling support for Real-Time Spectrum mode.
6. Added support for TG control via SCPI.

refactor：
1. Optimized the persistence algorithm in Real-Time Spectrum mode.
2. Optimized the Meterbar in EMI mode.
3. Added a warning for insufficient disk write speed during IQS data recording.
4. Chart data is now automatically converted and exported according to the currently selected units.
5. Added an expiration reminder for digital demodulation licenses.

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- SAStudio4_4.4.55.54 (27/08/2026)
* Fix the abnormal battery percentage issue in the PX series devices.
* Fix the abnormal low battery time issue in the PX series devices.
* Fixed the abnormal demodulation results for QAM16 and QAM64.

- SAStudio4_4.4.55.52 (18/08/2026)
* Added SCPI functionality
* Optimize EMI interaction experience

- SAStudio4_4.4.55.50 (03/08/2026)
1. MCU 0.55.67, FPGA 0.55.30, Bus 0.55.8/0.55.2/0.55.0/0.47.0
2. MCU 0.55.104, FPGA 0.55.104, Bus 0.55.8, PMU 1.15, AGU 1.5

* Fixed an issue when the startup configuration settings did not take effect
* Added EMC mode
* Added the ability to switch the ETH interface
* Added a Download button to the online update feature
* Enabled amplitude correction to take effect across all operating modes

For devices running certain legacy firmware versions, please use the following software version instead:
- SAStudio4 4.3.55.26 (13/07/2026)

1. SA series devices with MCU earlier than 0.55.30 or FPGA earlier than 0.55.10.
2. NX series devices with MCU earlier than 0.55.40 or FPGA earlier than 0.55.10.

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- SAStudio4_4.4.55.48 (13/07/2026)
1. MCU 0.55.66, FPGA 0.55.30, Bus 0.55.8/0.55.2/0.55.0/0.47.0
2. MCU 0.55.102, FPGA 0.55.103, Bus 0.55.8, PMU 1.15, AGU 1.5

* Optimized the software update mechanism.

For devices running certain legacy firmware versions, please use the following software version instead:
- SAStudio4 4.3.55.26 (13/07/2026)

1. SA series devices with MCU earlier than 0.55.30 or FPGA earlier than 0.55.10.
2. NX series devices with MCU earlier than 0.55.40 or FPGA earlier than 0.55.10.

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Note: This software version is a baseline version update. The firmware must be upgraded at the same time. The firmware version must meet any one of the following requirements:
- SAStudio4_4.4.55.44 (03/07/2026)
1. MCU 0.55.65, FPGA 0.55.28, Bus 0.55.8
2. MCU 0.55.66, FPGA 0.55.29, Bus 0.55.8
3. MCU 0.55.102, FPGA 0.55.103, Bus 0.55.8, PMU 1.15, AGU 1.5

* Fixed a software freeze issue on PXN devices when the Analysis Bandwidth was set to 190 kHz and FM demodulation was enabled and then disabled.
* Fixed a white-screen issue that could occur when restarting the software after maximizing it across dual monitors and then minimizing it in Workstation Mode.
* Fixed an issue in Workstation Mode where dialog windows became inaccessible after being dragged outside the main application window.
* Fixed an issue in IQS Mode where the recorded sample count did not correspond to the specified recording duration.
* Added attitude display support for the HDA-200 antenna
* Optimized the software update mechanism.

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*Note: This software version is a baseline update. Firmware must be upgraded simultaneously. Specific version requirements: MCU 0.55.97, FGPA 0.55.102, Bus 0.55.8, EIO 1.24, PMU 1.7, AGU 1.2
- SAStudio4_4.4.55.41 (15/04/2026)
* Added: Added tracking generator function
* Added: Added batch insert and delete function in MSCAN mode
* Added: Added fan control strategy for PXN series
* Added: Added sound test when adjusting volume
* Added: Added status bar notification when AUXS function is enabled

* Fixed: Fixed trace jitter issue when dragging traces up and down with gestures in RTA mode
* Fixed: Fixed abnormal behavior of the magnifier function in RTA mode
* Fixed: Fixed issue where GPIO was still displayed when the function was unavailable
* Fixed: Fixed incorrect color in the probability density map in RTA mode
* Fixed: Fixed crash issue in IQS mode when preview time is set to 100 ms and FM/AM is enabled

* Optimized: Optimized chart dispaly; Y-axis (unit: dBm) now keeps one decimal place
* Optimized: Optimized layout in Mapping mode
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*Note: This software version is a baseline update. Firmware must be upgraded simultaneously. Specific version requirements: MCU 0.55.65, FGPA 0.55.28, Bus 0.55.8, EIO 1.20
- SAStudio4_4.3.55.35 (02/03/2026)
* Fixed: SWP & RTA Modes: Fixed an issue where the trace average count remained at 1 during a single preview, even when trace averaging was enabled.
* Fixed: IM3 Function: Resolved a program crash occurring when the center frequency exceeded the device's upper frequency limit.
* Fixed: Digital Demodulation Mode: Fixed a display error where the center frequency of the spectrum was shown incorrectly when set to 3GHz.
* Added: Demodulation: Added support for 32QAM demodulation.


*Note: This software version is a baseline update. Firmware must be upgraded simultaneously. Specific version requirements: MCU 0.55.64, FGPA 0.55.28, Bus 0.55.6, EIO 1.20
- SAStudio4_4.3.55.33 (06/02/2026)
* Added: Mapping Mode

*Note: This software version is a baseline update. Firmware must be upgraded simultaneously. Specific version requirements: MCU 0.55.62, FGPA 0.55.28, Bus 0.55.6, EIO 1.16
- SAStudio4_4.3.55.30 (06/11/2025)
* Fixed: Crash caused by dragging thumbnail range box(IQvT-P/Spectrum-P) during single preview in IQS mode.
* Fixed: Delete data directory, unable to record files.
* Fixed: The time/date setting window does not recognize gestures when the DET trace is frozen.
* Fixed: The label bar at the top of the chart intersects with the recognized area of the movable control on the chart, resulting in an operation anomaly.

*Note: This software version is a baseline update. Firmware must be upgraded simultaneously. Specific version requirements: MCU 0.55.61, FGPA 0.55.28, Bus 0.55.6, EIO 1.16
- SAStudio4_3.55.29 (17/10/2025)
* Added: IQS level-triggered mode, add level-triggered line to thumbnail, support gesture dragging
* Added: IQS supports large bandwidth analog demodulation
* Added: Adaptive Antenna Factor Function
* Added: Adaptive reference level function
* Added: New averaging option for analog demodulation results
* Fixed: IQS, DET on pulse measurement at the same time, switching modes with each other will crash
* Fixed: IQS Mode 2 extracts log files, error file exists
* Fixed: Spectrogram export data immediately after opening, data table is empty
* Fixed: Analog AM demodulation, data in % units of measurement results are not multiplied by 100 for display

- SAStudio4_3.55.28 (05/09/2025)
* Added: IQS mode new AM/FM demodulation function
* Added: Support mouse wheel operation to change Span when gesture is enabled.
* Added: Antenna Factor Function (SWP-Amplitude)
* Fixed: Neutral version font inconsistency issue
* Fixed: Conflict between input state and write-back state of level threshold under level triggering

- SAStudio4_3.55.27 (25/08/2025)
* Added: Peak tracking function (Marker)
* Added: Function to automatically calculate peak determination parameters (Marker-Advanced)
* Added: SWP mode X-axis display ratio and logarithmic display function (Graph)
* Added: Data export function for harmonic measurement mode (Graph)
* Fixed: Compatible with configuration files saved by older versions of SAStudio4.
* Fixed: Fix the problem of device error in digital demodulation mode with specific sample rate
* Fixed: Fix the problem of incorrect display of battery level
* Fixed: Fix the problem that IQS mode 50MHz bandwidth continuous stream long time recording will report -10
* Optimized: add "Bus" version number to the parameter display in "System" > "About".

- SAStudio4_3.55.26 (04/08/2025)
* Added: Right-click menu functionality in the drawing area
* Added: Functionality to modify the trace name in the standard spectrum (Trace)
* Added: Line functionality in the standard spectrum (Graph)
* Added: "Spurious Suppression" mode displayed in the SWP mode label bar (S-Standard; E-Enhanced)
* Fixed: IQS mode configuration loading failure issue when starting with the most recent configuration
* Fixed: Incorrect battery reading issue in PXR devices
* Fixed: External keyboard input not supported by the numeric keypad
* Fixed: Occasional configuration loading failure when starting with the most recent configuration in SWP mode
* Fixed: Issue where the software window minimized after double-clicking the blank area in the top menu bar of PX series
* Fixed: Issue where peak value markers on the trace were not inverted in the "Bright" theme after enabling the peak value table, making them invisible
* Optimized: Marker peak search functionality, added parameter for peak value offset (Excursion/Peak Offset) in Marker-Advanced

- SAStudio4_3.55.24 (10/07/2025)
* Added: Harmonic analysis mode
* Added: SEM measurement function
* Added: "Amplitude correction" function
* Added: "Data export" function for Spectrogram plot
* Added: "Bright" mode for theme settings
* Added: "Reduce idle screen brightness" function
* Added: Enable switch for "Numeric detection" function
* Fixed: GNSS function when external devices are connected, there was a message parsing failure
* Fixed: IQS: When playing back DET files, clicking the next frame sometimes doesn't work
* Fixed: DET: Playback of the first part of the file was too fast, and the speed was inconsistent with the later part

- SAStudio4_3.55.22 (19/06/2025)
* Updated: API version upgraded from 0.55.60 to 0.55.61
* Added: Support for external GPS using the NMEA protocol
* Added: Pulse measurement in IQS mode
* Added: Digital demodulation modes: QAM128, QAM256
* Fixed: Marker values did not match actual positions when taking screenshots
* Fixed: Could not play back recorded files when the device was disconnected
* Fixed: Compatibility issues when running on Windows 7
* Fixed: Probability of configuration failure when editing preview time after enabling pulse measurement in DET
* Fixed: Incorrect center frequency when selecting IQS mode in cursor mode

- SAStudio4_3.55.21 (30/05/2025)
* Fixed: Marker state was abnormal when clicking the marker from the chart label area
* Fixed: Display mode switch, error response when selecting the current mode
* Fixed: No sound in AM demodulation in IQS mode

- SAStudio4_3.55.20 (23/05/2025)
* Added: Amplitude offset function
* Added: Unit switch function
* Added: Delta marker floating function
* Fixed: Marker pair name overlap issue
* Fixed: Display anomaly when loading markers from configuration file
* Fixed: Unreasonable "record mode" restrictions in IQS and DET
* Fixed: Unreasonable vertical pinch zoom mechanism
* Fixed: Thumbnail display range issue when playing back files

- SAStudio4_3.55.18 (14/05/2025)
* Updated: API version upgraded from 0.55.59 to 0.55.60
* Fixed: Unreasonable parameter setting range for "OBW(occupied bandwidth measurement)" in SWP mode

- SAStudio4_3.55.17 (06/05/2025)
* Updated: API version upgraded from 0.55.58 to 0.55.59

- SAStudio4_3.55.16 (21/04/2025)
* Fixed: Unreasonable minimum RBW limit in SWP mode

- SAStudio4_3.55.15 (11/04/2025)
* Added: Screen lock function, supported opening and closing from the system menu
* Fixed: Missing "to phase noise" option in the Switch to menu in SWP mode marker panel
* Fixed: Phase noise compatibility issue in SWP mode Meas
* Fixed: Thumbnail range box display strategy and chart name overlap issue in IQS mode

- SAStudio4_3.55.14 (02/04/2025)
* Added: Chart zoom function in DET mode
* Added: Reset function for trace type in phase noise mode
* Fixed: Unreasonable restrictions for data recording mode in IQS and DET
* Fixed: Incomplete configuration items in phase noise measurement mode
* Fixed: Device and configuration file compatibility issue when loading configuration
* Fixed: Incorrect order of spectrogram plot color bar and label layer
* Fixed: Incorrect state of "Continuous" button in the menu bar during file playback
* Fixed: Incorrect marker value precision in time-domain marker settings panel

- SAStudio4_3.55.13 (26/03/2025)
* Fixed: RBW calculation algorithm error in IQS mode

- SAStudio4_3.55.12 (25/03/2025)
* Updated: API upgraded to 0.55.58
* Added: Phase noise function
* Added: Magnifier function
* Added: Full Chinese language support
* Added: "Pause" and "Clear" buttons added to the Spectrogram plot sidebar
* Fixed: Non-realtime pulse measurement data
* Fixed: Full-screen display issue for 2880x1620 resolution screen
* Deleted: Removed "Phase Noise" from SWP mode measurement
* Optimized: Chart label and marker value overlap issue in IQS mode

- SAStudio4_3.55.10 (28/02/2025)
* Updated: API upgraded to 0.55.56
* Fixed: Signal source settings area did not display when opening software before connecting to the source device
* Fixed: Networked device interface occasionally did not refresh properly after quickly reopening software
* Optimized: IQS frequency spectrum label "AnalysisBW" changed to "Span" but value remains the same, and the BW value in the settings panel changed to 0.8*Span

- SAStudio4_3.55.9 (24/01/2025)
* Fixed: Demodulation library update to avoid errors caused by data types
* Fixed: Solved the issue of UI lag when changing symbol rate