Rigol DHO924 12bit DSO 250MHz, 4ch.

The RIGOL DHO924 Digital Oscilloscope is the 250 MHz non-AFG model in the DHO900 Series. It provides four analogue input channels, native 12-bit signal acquisition and mixed-signal capability for engineers, research laboratories, electronics manufacturers, educational institutions and industrial testing teams.

Built on RIGOL’s Centaurus technology platform, the DHO924 combines high analogue bandwidth, low-noise acquisition, deep memory, advanced triggering, serial bus decoding and fast waveform capture in a compact instrument. The oscilloscope supports 16 digital channels, but the optional PLA2216 logic analyser probe is required to connect digital signals.

250 MHz Analogue Bandwidth

The DHO924 provides 250 MHz analogue bandwidth across four input channels. Its typical rise time is 1.4 ns or less, making it suitable for faster embedded, digital and switching measurements than the 125 MHz DHO914.

Suitable measurements include:

• Microcontroller and FPGA clock signals
• PWM and pulse waveforms
• High-speed embedded control signals
• Switching power-supply waveforms
• Sensor and actuator outputs
• Analogue amplifier circuits
• Power-rail ripple and noise
• Communication interfaces
• Timing and phase relationships
• General signal-integrity troubleshooting

Actual measurement performance depends on the complete signal path, including the oscilloscope, probe bandwidth, signal rise time, source impedance, grounding and connection method.

Native 12-Bit Vertical Resolution

The DHO924 uses a native 12-bit analogue-to-digital converter. It provides 4,096 vertical quantisation levels, compared with 256 levels from a conventional 8-bit oscilloscope.

This increased vertical resolution helps engineers observe:

• Low-amplitude signal changes
• Power-supply ripple
• Switching noise
• Reference-voltage variation
• Sensor outputs
• Overshoot and ringing
• Small AC signals riding on DC levels
• Analogue waveform distortion
• Power-integrity problems

The 12-bit architecture is especially useful for power electronics, sensor measurements, precision analogue design and low-noise circuit analysis.

Four Analogue Input Channels

The four-channel design allows users to monitor several related signals simultaneously.

Typical four-channel measurements include:

• Clock, data and enable signals
• Voltage and current waveforms
• High-side and low-side gate-drive signals
• Converter input and output
• Multiple power rails
• Sensor output and controller response
• Reference and measured signals
• Multi-stage start-up sequences

Four-channel acquisition is useful when one event affects several parts of a system or when timing relationships must be compared across multiple circuit nodes.

Channel-Dependent Sampling Rate

The DHO924 provides a maximum real-time sampling rate of 1.25 GSa/s.

Sampling allocation is:

• 1.25 GSa/s with one analogue channel active
• 625 MSa/s per channel with two analogue channels active
• 312.5 MSa/s per channel with three or four analogue channels active

The oscilloscope uses shared acquisition resources, so engineers should consider the active-channel configuration when measuring fast signals.

Deep Acquisition Memory

The DHO924 provides a maximum analogue memory depth of 50 Mpts.

Memory allocation is:

• 50 Mpts with one active analogue channel
• 25 Mpts per channel with two active analogue channels
• 10 Mpts per channel with three or four active analogue channels

Deep memory allows longer signal captures while maintaining useful sample resolution.

It is beneficial for:

• Serial communication packet analysis
• Power-supply start-up testing
• Long pulse trains
• PWM and control-loop analysis
• Embedded-system timing measurements
• Intermittent fault investigation
• Motor-drive testing
• Production validation
• Long-duration waveform monitoring

Search and navigation tools help users locate selected waveform events within long acquisitions.

UltraAcquire Waveform Capture

The DHO924 supports UltraAcquire mode, providing waveform capture rates up to 1,000,000 waveforms per second.

The standard vector-mode capture rate reaches up to 30,000 wfms/s.

Fast waveform acquisition improves the probability of detecting:

• Short glitches
• Runt pulses
• Timing violations
• Signal dropouts
• Unstable waveform edges
• Abnormal switching behaviour
• Intermittent communication errors
• Power disturbances

The intensity-graded digital phosphor display uses 256 levels to distinguish frequently occurring signal activity from rare waveform events.

Hardware Waveform Recording and Playback

The oscilloscope supports hardware real-time waveform recording and playback for up to 500,000 frames.

This function allows engineers to:

• Record successive waveform events
• Replay captured signals
• Review frames individually
• Compare normal and abnormal waveforms
• Perform measurements during playback
• Decode recorded communication activity
• Investigate intermittent faults
• Analyse the sequence preceding a failure

Hardware recording is useful when a fault appears only after extended operation or under particular load conditions.

Low-Level Signal Measurement

The DHO924 provides vertical sensitivity from 200 µV/div to 10 V/div.

The low vertical scale supports detailed analysis of:

• Power-rail ripple
• Sensor outputs
• Amplifier noise
• Reference voltages
• Low-level analogue signals
• Small AC signals on larger DC levels

The 200 µV/div and 500 µV/div ranges are digitally magnified from the 1 mV/div range and should be considered accordingly during precision accuracy calculations.

A selectable 20 MHz bandwidth limit can reduce unwanted high-frequency noise when the full 250 MHz bandwidth is not required.

Low-Noise Analogue Front End

The combination of 12-bit acquisition, 1% DC gain accuracy above applicable vertical settings and a low-noise front end supports measurements where small waveform details must be separated from instrument noise.

Typical applications include:

• Power-integrity analysis
• Low-noise amplifier testing
• Battery-management systems
• Precision sensor circuits
• Reference-voltage measurement
• Power-converter output-noise analysis
• Audio electronics

Actual noise performance depends on bandwidth, vertical sensitivity, probe selection, source impedance and acquisition settings.

16-Channel Digital Capability

The DHO924 includes support for 16 digital input channels. A separately purchased PLA2216 logic analyser probe is required to connect digital signals.

Digital channels support:

• Microcontroller GPIO debugging
• FPGA and CPLD testing
• Parallel bus analysis
• Clock and data timing measurements
• Digital control-system troubleshooting
• Mixed analogue and digital debugging
• Protocol analysis using analogue or digital sources

The digital system provides two channel groups:

• D0 to D7
• D8 to D15

The digital-channel function is supported by the instrument, while the PLA2216 probe remains optional.

Digital Logic Thresholds

The digital channels support predefined and user-adjustable logic thresholds.

Available threshold settings include:

• TTL
• 5 V CMOS
• 3.3 V CMOS
• 2.5 V CMOS
• 1.8 V CMOS
• ECL
• PECL
• LVDS
• 0 V
• User-defined threshold

The user-defined threshold range is ±15 V with 10 mV adjustment steps.

This allows the logic analyser to work with several voltage standards used in embedded, industrial and automotive electronics.

Advanced Trigger Functions

The DHO924 provides a broad set of trigger modes for isolating specific waveform and communication conditions.

Available trigger types include:

• Edge
• Pulse width
• Slope
• Video
• Pattern
• Duration
• Timeout
• Runt
• Window
• Delay
• Setup and hold
• Nth edge
• RS232/UART
• I2C
• SPI
• CAN
• LIN

Trigger sources can include analogue channels and digital channels when the PLA2216 probe is connected.

These functions help engineers isolate narrow pulses, missing transitions, invalid communication events, timing errors and abnormal voltage conditions.

Serial Bus Triggering and Decoding

The DHO924 supports serial and parallel bus analysis for embedded and automotive applications.

Supported protocols include:

• RS232/UART
• I2C
• SPI
• CAN
• LIN
• Parallel bus decoding

Protocol information can be displayed directly on the waveform or within an event table.

This helps identify:

• Missing acknowledgements
• Incorrect data
• Timing errors
• Communication interruptions
• Voltage-level problems
• Electrical noise
• Physical-layer faults

Bus sources can be selected from analogue or digital channels, depending on the connected probe and signal configuration.

Automatic Measurements and Statistics

The oscilloscope provides automatic measurement functions for common voltage, timing, pulse and frequency parameters.

Available measurements include:

• Maximum and minimum voltage
• Peak-to-peak voltage
• Average voltage
• RMS voltage
• Frequency and period
• Rise and fall time
• Positive and negative pulse width
• Duty cycle
• Overshoot and preshoot
• Phase and delay

Measurement statistics help users evaluate current, average, maximum, minimum and variation across repeated acquisitions.

FFT and Frequency-Domain Analysis

The integrated FFT function converts captured time-domain signals into frequency-domain information.

Supported FFT window types include:

• Rectangular
• Blackman-Harris
• Hanning
• Hamming
• Flattop
• Triangle

Peak search can identify up to 15 frequency peaks based on configured thresholds.

Typical applications include:

• Harmonic analysis
• Switching-frequency measurement
• Clock-spectrum evaluation
• Noise-source identification
• EMI troubleshooting
• Detection of unwanted oscillations
•  

Mask and Pass/Fail Testing

Mask testing compares acquired waveforms with user-defined tolerance limits.

The function can display:

• Passed waveform count
• Failed waveform count
• Total test count

A pass or fail event can be configured to:

• Stop acquisition
• Activate the beeper
• Save a screenshot
• Generate an AUX output pulse

This supports repetitive production testing, waveform-quality validation and long-duration stability checks.

Compact and Portable Design

The DHO924 is designed for both laboratory and portable testing.

Approximate dimensions are:

• Width: 265.35 mm
• Height: 161.75 mm
• Depth: 77.38 mm

Approximate weight is 1.78 kg without packaging.

The compact enclosure supports VESA-compatible mounting, helping save bench space and simplify integration into test stations.

USB Type-C Power

The DHO924 uses a USB Type-C power input. The current RevineTech page specifies a 12 V, 4 A supply configuration with maximum consumption dependent on connected interfaces and accessories.

USB Type-C power supports:

• Mobile laboratory work
• Field maintenance
• Automotive troubleshooting
• Industrial service applications
• Remote equipment inspection
• Portable testing with a compatible power source

The power source must meet the voltage and current requirements specified by RIGOL for safe operation.

7-Inch Capacitive Touchscreen

The DHO924 includes:

• 7-inch capacitive multi-touch display
• 1024 × 600 resolution
• Gesture-based operation
• 256 intensity levels
• Adjustable persistence
• Flex Knob control
• HDMI external display support

The interface can display waveforms, decoded buses, measurements, histograms and analysis results clearly.

Connectivity and Remote Control

Standard connectivity includes:

• USB Host
• USB Device
• 10/100 LAN
• LXI-C support
• HDMI output
• AUX output
• Web Control
• Probe compensation output

Web Control allows remote operation through a compatible browser using the instrument’s network address.

SCPI programming supports automated validation, production testing and laboratory integration.

No Built-In Waveform Generator

The DHO924 does not include a built-in arbitrary waveform generator or Bode plot function.

These features are available on the DHO924S model.

Users requiring integrated signal generation and Bode plot analysis should select the DHO924S rather than the standard DHO924.

Applications

The RIGOL DHO924 is suitable for:

• Embedded-system development
• Microcontroller debugging
• FPGA and CPLD testing
• Mixed-signal circuit analysis
• Power electronics testing
• Switching power-supply analysis
• Automotive electronics
• CAN and LIN bus testing
• Sensor and analogue circuit analysis
• Power-rail and ripple measurements
• Signal-integrity troubleshooting
• Semiconductor testing
• Production-line validation
• Research and development
• Engineering education
• Field maintenance
•  

Why Buy from RevineTech?

RevineTech supplies professional test and measurement instruments for electronics development, industrial testing, research, education and production applications.

Technical product-selection support can include:

• DHO924 configuration
• PLA2216 logic-probe selection
• Passive probe selection
• High-voltage differential probes
• Current probes
• Serial and automotive bus testing
• Calibration documentation
• VESA mounting accessories
• Automated test integration