The RIGOL DHO814 Digital Oscilloscope is the four-channel, 100 MHz model in the DHO800 Series. It is designed for engineers, technicians, research laboratories, educational institutions and electronics service teams that need detailed multi-channel waveform analysis in a compact instrument.
Built on RIGOL’s Centaurus technology platform, the DHO814 uses a native 12-bit analogue-to-digital converter. It provides 4,096 vertical quantisation levels compared with 256 levels from an 8-bit oscilloscope. This helps users observe smaller voltage variations, ripple, noise, overshoot and waveform distortion more clearly.
100 MHz Analogue Bandwidth
The DHO814 provides:
- 100 MHz analogue bandwidth
- Four analogue input channels
- Native 12-bit vertical resolution
- Typical rise time of approximately 3.5 ns
- Selectable 20 MHz bandwidth limit
- 1 MΩ analogue input impedance
It is suitable for analysing:
- Microcontroller clock and control signals
- PWM and pulse waveforms
- FPGA and embedded-system signals
- Sensor and actuator outputs
- Switching power-supply signals
- Power-rail ripple
- Analogue amplifier circuits
- Audio and instrumentation signals
- Communication interfaces
- Phase and timing relationships
The DHO814 does not have a separate external trigger input. A dedicated external trigger connector is available on the two-channel DHO802 and DHO812 models.
Four Analogue Channels
The four-channel configuration allows engineers to observe several related signals simultaneously.
Typical measurements include:
- Clock, data, enable and reset lines
- Input and output waveforms
- Voltage and current relationships
- Multiple power rails
- Sensor output and controller response
- High-side and low-side control signals
- Reference and measured signals
- Multi-stage start-up sequences
Four analogue channels are especially useful when a fault affects several sections of a circuit or when multiple timing relationships must be analysed together.
Native 12-Bit Vertical Resolution
The DHO814 provides 4,096 vertical quantisation levels.
Key benefits include:
- Sixteen times more vertical levels than 8-bit acquisition
- Improved visibility of small-amplitude signals
- Better ripple and noise analysis
- More detailed waveform representation
- Improved measurement of small AC signals on DC rails
- Clearer observation of overshoot, ringing and distortion
This makes the oscilloscope suitable for:
- Power-integrity testing
- Precision sensor measurements
- Low-noise analogue design
- Battery-powered electronics
- Audio circuit analysis
- Reference-voltage evaluation
- Power-supply measurements
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Channel-Dependent Sampling Rate
The maximum real-time sample rate depends on the number of enabled analogue channels:
- 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
The instrument uses shared acquisition resources. Engineers should consider the active-channel count when measuring higher-frequency signals or fast waveform transitions.
Deep Acquisition Memory
The DHO814 provides a maximum memory depth of 25 Mpts.
Memory allocation depends on the number of enabled channels:
- 25 Mpts with one active channel
- 10 Mpts per channel with two active channels
- 5 Mpts per channel with three or four active channels
Deep memory allows users to capture longer signal intervals while retaining useful waveform resolution.
It is beneficial for:
- Long serial communication packets
- Power-supply start-up sequences
- PWM and pulse-train analysis
- Embedded-system timing measurements
- Long control sequences
- Intermittent fault investigation
- Production monitoring
- Extended waveform capture
The product page should not state 25 Mpts per channel during four-channel operation. The verified four-channel allocation is 5 Mpts per channel.
UltraAcquire Waveform Capture
The DHO814 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
- Abnormal pulse widths
- Intermittent noise
- Communication errors
The digital phosphor display uses 256 levels of intensity grading to distinguish frequently occurring waveform behaviour from rare events.
Hardware Waveform Recording and Playback
The DHO814 supports hardware waveform recording and playback of up to 500,000 frames.
Users can:
- Record successive waveform events
- Replay captures continuously
- Review frames individually
- Compare normal and abnormal signals
- Perform measurements during playback
- Apply waveform mathematics
- Decode recorded serial activity
- Investigate intermittent faults
This is useful when a fault appears only after extended operation or under specific load conditions.
Low-Level Signal Measurement
The oscilloscope provides vertical sensitivity from:
This supports:
- Power-supply ripple measurement
- Sensor output testing
- Amplifier noise analysis
- Reference-voltage testing
- Small analogue waveform measurement
- Audio and instrumentation signals
The 500 µV/div range uses digital magnification and should be considered accordingly during precision measurements.
Advanced Trigger Functions
The DHO814 provides multiple trigger modes for isolating specific waveform conditions:
- 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 users locate narrow pulses, missing transitions, timing errors, invalid communication events and intermittent signal abnormalities.
Serial Bus Triggering and Decoding
The DHO814 supports protocol triggering and decoding for:
- RS232/UART
- I2C
- SPI
- CAN
- Parallel bus
Protocol data can be displayed beside the electrical 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
RIGOL’s current DHO800 materials identify serial bus triggering and decoding as part of the platform’s analysis capability.
Automatic Measurements and Statistics
The DHO814 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 users evaluate signal stability and variation across repeated acquisitions.
FFT and Waveform Mathematics
The oscilloscope provides waveform mathematics and frequency-domain analysis, including:
- Addition
- Subtraction
- Multiplication
- Division
- FFT
- Integration
- Differentiation
- Square root
- Logarithmic functions
- Logical operations
- Low-pass filtering
- High-pass filtering
- Band-pass filtering
- Band-stop filtering
FFT analysis supports long waveform records and peak-search functions.
Typical applications include:
- Harmonic analysis
- Switching-frequency measurement
- Clock-spectrum evaluation
- Noise-source identification
- EMI troubleshooting
- Detection of unwanted oscillations
-
Mask Testing and Histogram Analysis
The DHO814 includes mask-based pass/fail testing for repetitive waveform validation.
A pass or fail event can be configured to:
- Stop acquisition
- Activate the beeper
- Save a screenshot
- Update test-count 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 DHO814 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
-
7-Inch Capacitive Touchscreen
The DHO814 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 touchscreen provides access to waveforms, measurements, protocol decoding and analysis functions.
Compact and Portable Design
The instrument 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 DHO814 uses USB Type-C power rated at approximately:
- 15 V DC
- 3 A
- Maximum power consumption of approximately 45 W
This makes the oscilloscope suitable for:
- Field maintenance
- Automotive troubleshooting
- Mobile laboratory testing
- Industrial servicing
- Remote equipment inspection
- On-site electronics testing
-
Connectivity and Remote Control
Standard interfaces include:
- USB Host
- USB Device
- 10/100 LAN
- LXI-C
- HDMI output
- AUX output
- Web Control
- USB Type-C power input
- Probe compensation output
Web Control allows operation through a compatible browser. SCPI and IEEE 488.2 command support enable integration into automated test systems.
No Digital Logic Channels or Built-In AFG
The DHO814 does not include:
- Digital logic channels
- A logic-analyser probe interface
- A built-in function generator
- An arbitrary waveform generator
- Bode plot analysis
- A separate external trigger input
Users requiring mixed-signal analysis or an integrated waveform generator should consider a suitable DHO900-series model.
Applications
The RIGOL DHO814 is suitable for:
- Embedded-system development
- Microcontroller debugging
- Four-channel analogue analysis
- Power-supply testing
- PWM waveform measurement
- Sensor and actuator testing
- RS232, I2C, SPI and CAN debugging
- Power-rail ripple analysis
- Audio electronics
- Electronic equipment maintenance
- Production-line validation
- Research and development
- Engineering education
- Field troubleshooting
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Why Buy from RevineTech?
RevineTech supplies test and measurement instruments for electronics development, industrial testing, education, maintenance and research.
Technical selection support can include:
- DHO814 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
