The RIGOL DHO812 Digital Oscilloscope is the 100 MHz, two-channel model in the DHO800 Series. It is designed for engineers, technicians, research laboratories, educational institutions and electronics service teams that need improved vertical resolution, modern waveform analysis and a compact test platform.
Built on RIGOL’s Centaurus technology platform, the DHO812 uses a native 12-bit analogue-to-digital converter. This provides 4,096 vertical quantisation levels compared with 256 levels from a conventional 8-bit oscilloscope, helping users observe smaller voltage variations, ripple, noise and distortion.
100 MHz Analogue Bandwidth
The DHO812 provides:
- 100 MHz analogue bandwidth
- Two analogue input channels
- One separate external trigger input
- Typical rise time of approximately 3.5 ns
- Native 12-bit vertical resolution
- Selectable 20 MHz bandwidth limit
- 1 MΩ analogue input impedance
It is suitable for analysing:
- Microcontroller clock signals
- PWM and pulse waveforms
- Embedded control signals
- Sensor and actuator outputs
- Switching power-supply signals
- Analogue amplifier circuits
- Power-supply ripple
- Communication interfaces
- Timing and phase relationships
- General electronics faults
The separate external trigger input is available on the two-channel DHO802 and DHO812 models. It is not provided on the four-channel DHO804 and DHO814.
Two Analogue Channels
The two-channel design allows engineers to compare related signals simultaneously.
Typical measurements include:
- Input versus output
- Clock versus data
- Voltage versus current
- Sensor output versus controller response
- Reference versus measured signal
- Power-supply input versus output
- Phase and delay between two waveforms
- Gate-drive signal versus switching response
The external trigger input can be used to synchronise acquisition without occupying either analogue measurement channel.
Native 12-Bit Vertical Resolution
The DHO812 provides 4,096 vertical quantisation levels.
This supports more detailed analysis of:
- Low-amplitude sensor signals
- Power-supply ripple
- Amplifier noise
- Reference-voltage changes
- Audio waveforms
- Small AC signals on DC rails
- Overshoot and ringing
- Analogue waveform distortion
The higher vertical resolution is useful for power integrity testing, precision analogue measurements, sensor electronics and low-noise circuit development.
Real-Time Sampling Performance
The DHO812 provides channel-dependent real-time sampling:
- 1.25 GSa/s with one analogue channel active
- 625 MSa/s per channel with both analogue channels active
The sample rate helps users observe waveform shape, pulse behaviour, ringing, overshoot and transient events.
Peak Detect acquisition can capture narrow glitches down to approximately 1.6 ns under specified conditions.
Deep Acquisition Memory
The DHO812 provides maximum memory depth of:
- 25 Mpts with one analogue channel active
- 10 Mpts per channel with both analogue channels active
Deep memory allows longer waveform captures while retaining useful sample resolution.
It is beneficial for:
- Serial communication packets
- Power-supply start-up sequences
- PWM and pulse-train analysis
- Embedded-system timing measurements
- Intermittent fault investigation
- Long control sequences
- Production monitoring
- Extended waveform capture
Search and navigation tools help users locate selected waveform events within long records.
UltraAcquire Waveform Capture
The DHO812 supports:
- Up to 30,000 wfms/s in Vector mode
- Up to 1,000,000 wfms/s in UltraAcquire mode
Fast waveform capture improves the probability of detecting:
- Rare glitches
- Runt pulses
- Timing violations
- Signal dropouts
- Unstable waveform edges
- Intermittent noise
- Communication errors
- Abnormal pulse widths
The digital phosphor display uses 256-level intensity grading to distinguish frequent waveform activity from less common events.
Hardware Waveform Recording and Playback
The DHO812 supports hardware waveform recording and playback for up to 500,000 frames.
Users can:
- Record successive waveform events
- Replay acquired signals
- Review frames individually
- Compare normal and abnormal waveforms
- Perform measurements during playback
- Apply waveform mathematics
- Decode recorded serial activity
- Investigate intermittent faults
This function is useful when a signal problem occurs only after extended operation or under specific load conditions.
Low-Level Signal Measurement
The DHO812 provides vertical sensitivity from:
The low vertical range supports:
- Power-supply ripple measurement
- Sensor output testing
- Low-noise amplifier analysis
- Reference-voltage testing
- Small analogue waveform measurement
- Audio and instrumentation signals
The 500 µV/div range uses digital magnification from the 1 mV/div range and should be considered accordingly during precision measurements.
Advanced Trigger Functions
The DHO812 supports a broad selection of trigger modes:
- Edge
- Pulse width
- Slope
- Video
- Pattern
- Duration
- Timeout
- Runt
- Window
- Delay
- Setup and hold
- Nth edge
- RS232/UART
- I2C
- SPI
- CAN
These trigger functions help isolate narrow pulses, missing transitions, timing errors, invalid communication conditions and intermittent abnormalities.
Trigger sources include:
- Analogue channel 1
- Analogue channel 2
- External trigger
- AC line, depending on trigger mode
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Serial Bus Triggering and Decoding
The DHO812 supports protocol triggering and decoding for:
- RS232/UART
- I2C
- SPI
- CAN
- Parallel bus
Protocol information can be displayed beside the physical waveform or in an event table.
This helps engineers identify:
- Missing acknowledgements
- Invalid data
- Timing problems
- Communication interruptions
- Incorrect voltage levels
- Noise-related errors
- Physical-layer faults
The DHO800 platform supports up to four protocol types for simultaneous decoding, depending on the acquisition configuration.
Automatic Measurements and Statistics
The DHO812 supports 41 automatic waveform measurements, including:
- 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
- Slew rate
- Phase
- Delay
Up to ten measurements can be displayed simultaneously. Measurement statistics help evaluate signal variation across repeated acquisitions.
FFT and Waveform Mathematics
The oscilloscope supports multiple waveform mathematics and frequency-domain functions:
- Addition
- Subtraction
- Multiplication
- Division
- FFT
- Integration
- Differentiation
- Square root
- Logarithmic operations
- Logical operations
- Low-pass filtering
- High-pass filtering
- Band-pass filtering
- Band-stop filtering
FFT analysis supports long waveform records and peak-search tools for identifying dominant frequency components.
Typical applications include:
- Harmonic analysis
- Switching-frequency measurement
- Noise-source identification
- Clock-spectrum evaluation
- EMI troubleshooting
- Detection of unwanted oscillations
-
Mask Testing and Histogram Analysis
The DHO812 includes mask-based pass/fail testing for repetitive waveform validation.
A pass/fail event can be configured to:
- Stop acquisition
- Activate the beeper
- Save a screenshot
- Update pass and fail statistics
- Generate an AUX output response
Histogram analysis supports horizontal, vertical and measurement histograms for evaluating waveform distribution and signal stability.
Digital Voltmeter and Frequency Counter
The DHO812 includes a digital voltmeter supporting:
- DC voltage
- AC RMS voltage
- AC+DC RMS voltage
It also includes a precision frequency counter with:
- Frequency measurement
- Period measurement
- Selectable three-to-six-digit resolution
- 48-bit totaliser
The external trigger input can also be selected as a counter source on the two-channel model.
7-Inch Capacitive Touchscreen
The DHO812 includes:
- 7-inch capacitive multi-touch display
- 1024 × 600 resolution
- Gesture-based operation
- 256 intensity levels
- Adjustable persistence
- Flex Knob control
- HDMI external display output
The interface provides clear access to waveforms, measurements, protocol decoding and analysis functions.
Compact and Portable Design
The oscilloscope measures approximately:
- 265.35 mm wide
- 161.75 mm high
- 77.38 mm deep
Its weight is approximately 1.78 kg without packaging.
The compact enclosure supports VESA-compatible mounting, helping reduce bench-space requirements in laboratories and test stations.
USB Type-C Power
The DHO812 uses a USB Type-C power input rated for the compatible RIGOL power adaptor.
This supports portable use for:
- Field maintenance
- Automotive troubleshooting
- Mobile laboratory testing
- Industrial servicing
- Remote equipment inspection
- On-site electronics testing
The power source must meet the voltage, current and USB Power Delivery requirements stated by RIGOL.
Connectivity and Remote Control
Standard interfaces include:
- USB Host
- USB Device
- 10/100 LAN
- LXI-C
- HDMI output
- AUX output
- Web Control
- External trigger input
- Probe compensation output
- USB Type-C power input
Web Control allows users to operate the oscilloscope through a compatible browser. SCPI and IEEE 488.2 command support allow integration into automated test systems.
No Digital Channels or Built-In AFG
The DHO812 does not include:
- Digital logic channels
- Logic-analyser probe support
- Built-in function generator
- Arbitrary waveform generator
- Bode plot analysis
Users requiring four analogue channels can consider the DHO814. Users requiring digital channels or an integrated signal generator should evaluate a suitable DHO900-series model.
Applications
The RIGOL DHO812 is suitable for:
- Embedded-system development
- Microcontroller debugging
- Analogue circuit analysis
- Power-supply testing
- PWM waveform measurement
- Sensor and actuator testing
- RS232, I2C, SPI and CAN debugging
- Audio electronics
- Power-rail ripple measurement
- Electronic equipment maintenance
- Production-line validation
- Research and development
- Engineering education
- Field troubleshooting
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Why Buy from RevineTech?
RevineTech supplies professional test and measurement instruments for electronics development, industrial testing, education, maintenance and research.
Technical selection support can include:
- DHO812 model selection
- Passive probe requirements
- High-voltage differential probes
- Current probes
- Serial bus testing
- USB Type-C power requirements
- Calibration documentation
- VESA mounting accessories
- Automated test integration
