*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(FX3) 0.55.6, EIO(GNSS) 1.6
- SAStudio4_4.3.55.30（11/6/2025）
* 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(FX3) 0.55.6, EIO(GNSS) 1.6
- SAStudio4_3.55.29 (10/17/2025)
* 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 (9/5/2025)
* 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 (8/25/2025)
* 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 (8/4/2025)
* 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 (7/10/2025)
* 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 (6/19/2025)
* 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 (5/30/2025)
* 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 (5/23/2025)
* 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 (5/14/2025)
* 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 (5/6/2025)
* Updated: API version upgraded from 0.55.58 to 0.55.59

- SAStudio4_3.55.16 (4/21/2025)
* Fixed: Unreasonable minimum RBW limit in SWP mode

- SAStudio4_3.55.15 (4/11/2025)
* 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 (4/2/2025)
* 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 (3/26/2025)
* Fixed: RBW calculation algorithm error in IQS mode

- SAStudio4_3.55.12 (3/25/2025)
* 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 (2/28/2025)
* 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 (1/24/2025)
* Fixed: Demodulation library update to avoid errors caused by data types
* Fixed: Solved the issue of UI lag when changing symbol rate
