The RIGOL DHO924S Digital Oscilloscope is the 250 MHz signal-source model in the DHO900 Series. It combines four-channel high-resolution waveform acquisition, mixed-signal analysis, serial bus decoding, waveform generation and Bode plot testing in one compact instrument.
The DHO924S provides:
- Four analogue input channels
- 250 MHz analogue bandwidth
- Native 12-bit vertical resolution
- Up to 1.25 GSa/s real-time sampling
- Up to 50 Mpts memory depth
- Up to 1,000,000 wfms/s in UltraAcquire mode
- Single-channel 25 MHz function/arbitrary waveform generator
- Bode plot analysis
- Sixteen digital-channel capability
- A 7-inch capacitive touchscreen
The built-in AFG and Bode plot functions distinguish the DHO924S from the standard DHO924. The digital inputs are supported by the oscilloscope, but the optional PLA2216 logic analyser probe is required to connect digital signals.
250 MHz Analogue Bandwidth
The DHO924S provides 250 MHz analogue bandwidth across four input channels, making it suitable for faster embedded, switching and communication measurements.
Typical applications include:
- Microcontroller and FPGA debugging
- Fast clock and pulse measurements
- PWM and control-signal analysis
- Switching power-supply testing
- Gate-drive waveform analysis
- Sensor and actuator measurements
- Analogue amplifier testing
- Power-rail ripple measurement
- Automotive electronics
- Communication-interface troubleshooting
Its typical calculated rise time is approximately 1.4 ns. The complete measurement bandwidth also depends on the probe, cable, grounding method, source impedance and signal connection.
Native 12-Bit Vertical Resolution
The DHO924S uses a native 12-bit analogue-to-digital converter, providing 4,096 vertical quantisation levels. This is 16 times the number of levels available from a conventional 8-bit acquisition system.
The higher vertical resolution improves the visibility of:
- Low-amplitude waveform variations
- Power-supply ripple
- Switching noise
- Reference-voltage changes
- Sensor outputs
- Overshoot and ringing
- Small AC signals on larger DC levels
- Analogue distortion
- Power-integrity problems
This makes the DHO924S suitable for power electronics, precision analogue design, sensor testing, battery-management systems and low-noise circuit analysis.
Four Analogue Input Channels
The four-channel configuration allows engineers to examine several related signals at the same time.
Typical measurements include:
- Clock, data and enable signals
- Converter input and output waveforms
- Voltage and current signals
- High-side and low-side gate drives
- Multiple power rails
- Sensor output and controller response
- Reference and measured signals
- Multi-stage start-up sequences
Four-channel acquisition is useful when a circuit event affects multiple signal paths or when phase and timing relationships must be compared.
Channel-Dependent Sampling Rate
The DHO924S provides a maximum real-time sample rate of 1.25 GSa/s.
Sampling performance depends on the active-channel configuration:
- One active channel: up to 1.25 GSa/s
- Two active channels: up to 625 MSa/s per channel
- Three or four active channels: up to 312.5 MSa/s per channel
Engineers should consider the active channel count when measuring high-frequency signals or fast transitions.
Deep Acquisition Memory
The DHO924S provides a maximum analogue memory depth of 50 Mpts.
Memory allocation depends on the number of enabled analogue channels:
- 50 Mpts with one active channel
- 25 Mpts per channel with two active channels
- 10 Mpts per channel with three or four active channels
Deep memory helps maintain useful waveform detail over longer captures.
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
Search and navigation tools help users locate selected waveform events inside long acquisitions.
UltraAcquire Waveform Capture
The DHO924S supports UltraAcquire mode with a maximum waveform capture rate of up to 1,000,000 waveforms per second.
Fast acquisition improves the probability of finding:
- Rare glitches
- Runt pulses
- Timing violations
- Unstable waveform edges
- Signal dropouts
- Intermittent communication errors
- Switching abnormalities
- Power disturbances
The digital phosphor display uses real-time intensity grading to distinguish frequently occurring waveform behaviour from rare signal events.
Hardware Waveform Recording and Playback
The oscilloscope supports hardware waveform recording and playback for long-duration signal monitoring.
Engineers can:
- Record successive waveform events
- Review frames individually
- Replay captured activity
- Compare normal and abnormal signals
- Perform measurements during playback
- Analyse decoded protocol activity
- Investigate intermittent faults
- Review events leading to a failure
This is useful when faults occur only under specific loads, timing conditions or extended operation.
Built-In Single-Channel 25 MHz AFG
The DHO924S includes a single-channel 25 MHz function/arbitrary waveform generator. It is not a dual-channel generator.
The integrated signal source allows engineers to generate a stimulus waveform and measure the resulting circuit response using the same instrument.
Supported waveform categories include:
- Sine
- Square
- Ramp
- DC
- Noise
- Arbitrary waveforms
Typical applications include:
- Amplifier testing
- Filter evaluation
- Sensor simulation
- Clock and stimulus generation
- Component testing
- Circuit-response measurements
- Educational experiments
- Control-loop testing
The AFG output is available through the dedicated rear-panel AFG connector on the DHO914S and DHO924S models.
AFG Performance
The integrated arbitrary function generator provides:
- One output channel
- Maximum sine-wave frequency of 25 MHz
- Maximum square-wave frequency of 15 MHz
- 156 MSa/s generation sample rate
- 14-bit vertical resolution
- Standard waveform output
- User-defined arbitrary waveform support
- Adjustable frequency, amplitude and offset
Output characteristics depend on the selected waveform, frequency and load configuration.
Bode Plot Analysis
Bode plot analysis is standard on the DHO924S. It uses the built-in AFG to sweep a circuit across a selected frequency range and measure gain and phase response.
Typical Bode plot applications include:
- Switching power-supply loop analysis
- Filter frequency-response testing
- Amplifier characterisation
- Gain and phase measurement
- Feedback-system evaluation
- Control-loop stability testing
- Component frequency-response testing
The Bode plot function reduces the need for an external waveform generator during loop-response and frequency-response measurements.
Sixteen Digital-Channel Capability
The DHO924S includes support for 16 digital channels. The optional PLA2216 logic analyser probe is required to connect digital signals.
Digital analysis supports:
- Microcontroller GPIO debugging
- FPGA and CPLD testing
- Parallel bus analysis
- Clock and data timing
- Mixed analogue and digital debugging
- Digital control-system testing
- Protocol analysis using digital inputs
The digital inputs are divided into two groups:
The PLA2216 probe should be shown as an optional accessory unless its inclusion is confirmed in the commercial quotation.
Digital Logic Thresholds
The digital channels support predefined and adjustable logic thresholds for common digital standards.
Threshold selections include:
- TTL
- 5 V CMOS
- 3.3 V CMOS
- 2.5 V CMOS
- 1.8 V CMOS
- ECL
- PECL
- LVDS
- User-defined threshold
This allows the oscilloscope to work with different embedded, industrial and automotive logic levels.
Serial and Parallel Bus Analysis
The DHO924S supports triggering and decoding for common embedded and automotive communication buses.
Supported protocols include:
- RS232/UART
- I2C
- SPI
- CAN
- LIN
- Parallel bus
Protocol information can be displayed directly on the waveform or in an event table.
Bus analysis helps identify:
- Incorrect data
- Missing acknowledgements
- Timing errors
- Communication interruptions
- Voltage-level problems
- Noise-related faults
- Physical-layer errors
The DHO900 Series includes these protocol-analysis capabilities as part of its embedded and automotive debugging functions.
Advanced Trigger Functions
The DHO924S provides a broad set of trigger types, including:
- Edge
- Pulse width
- Slope
- Video
- Pattern
- Duration
- Timeout
- Runt
- Window
- Delay
- Setup and hold
- Nth edge
- RS232/UART
- I2C
- SPI
- CAN
- LIN
These trigger modes help engineers isolate short pulses, timing violations, abnormal signal levels, missing transitions and selected communication events.
Low-Level Signal Measurement
The DHO924S provides vertical sensitivity from 200 µV/div to 10 V/div.
The low vertical range supports measurements of:
- Power-supply ripple
- Sensor outputs
- Reference voltages
- Amplifier noise
- Low-level analogue signals
- Small AC signals on DC rails
- Converter output noise
The lowest vertical ranges use digital magnification and should be considered accordingly during precision accuracy calculations.
Automatic Measurements and Statistics
The oscilloscope supports common automatic voltage, timing, frequency and pulse measurements.
Typical measurements include:
- Maximum and minimum voltage
- Peak-to-peak voltage
- Average and RMS voltage
- Frequency and period
- Rise and fall time
- Positive and negative pulse width
- Duty cycle
- Overshoot and preshoot
- Phase
- Delay
Measurement statistics help users evaluate variation over repeated acquisitions.
FFT and Frequency-Domain Analysis
The integrated FFT function converts acquired time-domain signals into frequency-domain information.
Typical applications include:
- Harmonic analysis
- Switching-frequency measurement
- Clock-spectrum evaluation
- Noise-source identification
- EMI troubleshooting
- Detection of unwanted oscillations
- Amplifier and filter analysis
Peak-search tools help identify dominant frequency components in the captured signal.
Mask and Pass/Fail Testing
Mask testing compares acquired waveforms with user-defined tolerance limits.
It can support:
- Production-line testing
- Repetitive quality checks
- Signal-stability monitoring
- Component comparison
- Detection of waveform deviations
- Long-duration reliability testing
A pass or fail event can be linked to acquisition control, screenshot storage, audible indication or AUX output signalling.
Compact and Portable Design
The DHO924S uses a compact enclosure designed for benchtop and portable applications.
It supports:
- Mobile laboratory work
- Automotive field testing
- Industrial maintenance
- Remote equipment inspection
- On-site circuit troubleshooting
- VESA-compatible mounting
Its compact footprint helps save space in shared laboratories and automated test stations.
USB Type-C Power
The DHO900 Series supports USB Type-C power, allowing the oscilloscope to operate from a compatible power adaptor or portable power source that meets the required electrical rating.
This is useful for:
- Field maintenance
- Automotive troubleshooting
- Mobile testing
- Remote equipment inspection
- Locations without convenient mains access
The connected power source must meet the voltage and current requirements specified by RIGOL.
Display and Connectivity
The DHO924S includes a 7-inch capacitive touchscreen with 1024 × 600 resolution.
Connectivity includes:
- USB Host
- USB Device
- LAN
- LXI-C
- HDMI output
- AUX output
- Web Control
- USB Type-C power input
Web Control allows users to operate the oscilloscope through a compatible browser, while remote commands support automated test integration.
Applications
The RIGOL DHO924S is suitable for:
- Embedded-system development
- Microcontroller and FPGA debugging
- Power electronics testing
- Switching power-supply analysis
- Bode plot and loop-response testing
- Amplifier and filter testing
- Automotive electronics
- CAN and LIN bus analysis
- Sensor and analogue circuit testing
- Power-rail ripple measurements
- Signal-integrity troubleshooting
- Production validation
- Research and development
- Engineering education
- Field maintenance
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Why Buy from RevineTech?
RevineTech supplies test and measurement equipment for electronics development, industrial testing, research, education and production applications.
Technical selection assistance can cover:
- DHO924S configuration
- PLA2216 logic-probe selection
- Passive probe selection
- High-voltage differential probes
- Current probes
- Bode plot measurement setup
- Serial and automotive bus analysis
- Calibration documentation
- VESA or rack-mount accessories
- Automated test integration
