The RIGOL DHO802 Digital Oscilloscope is the two-channel, 70 MHz model in the DHO800 Series. It is developed for engineers, technicians, research laboratories, educational institutions and electronics service teams that require high vertical resolution, compact dimensions and modern waveform-analysis functions.
The DHO802 uses RIGOL’s Centaurus technology platform and a native 12-bit analogue-to-digital converter. A 12-bit acquisition system provides 4,096 vertical quantisation levels, compared with 256 levels from a conventional 8-bit oscilloscope. This improves the visibility of low-amplitude waveform changes, ripple, noise, overshoot and distortion.
70 MHz Analogue Bandwidth
The DHO802 provides:
- 70 MHz analogue bandwidth
- Two analogue input channels
- One external trigger input
- Typical rise time of 5 ns or less
- 1 MΩ input impedance
- Selectable 20 MHz bandwidth limit
- 12-bit native vertical resolution
The two-channel configuration is suitable for comparing:
- Input and output waveforms
- Clock and data signals
- Voltage and current
- Sensor output and controller response
- Reference and measured signals
- Power-supply input and output
- Phase and timing relationships
The external trigger input is available specifically on the two-channel DHO800 models.
Native 12-Bit Vertical Resolution
The DHO802 provides 4,096 vertical quantisation levels.
This supports more detailed analysis of:
- Power-supply ripple
- Low-amplitude sensor outputs
- Amplifier noise
- Reference-voltage variation
- Audio signals
- Small AC signals on DC rails
- Overshoot and ringing
- Analogue waveform distortion
The higher vertical resolution is especially useful for precision analogue measurements, power integrity testing, sensor electronics and low-noise circuit development.
Real-Time Sampling Performance
The DHO802 provides channel-dependent sampling:
- 1.25 GSa/s with one analogue channel active
- 625 MSa/s per channel with both analogue channels active
The high real-time sample rate helps users observe waveform shape, pulse behaviour, ringing, overshoot and transient events.
The oscilloscope can capture glitches as narrow as approximately 1.6 ns using Peak Detect acquisition.
Deep Acquisition Memory
The DHO802 provides maximum memory depth of:
- 25 Mpts with one analogue channel active
- 10 Mpts per channel with both analogue channels active
Deep acquisition memory allows users to capture longer signal intervals while retaining useful waveform detail.
It is beneficial for:
- Long serial communication packets
- Power-supply start-up testing
- PWM and pulse-train analysis
- Embedded-system timing measurements
- Intermittent fault investigation
- Long control sequences
- Production monitoring
- Extended waveform capture
Search and navigation functions help users locate selected edges, pulses and events within long acquisitions.
UltraAcquire Waveform Capture
The DHO802 supports two waveform-acquisition performance levels:
- 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 finding:
- 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 frequently occurring waveform activity from rare events.
Hardware Waveform Recording and Playback
The DHO802 supports hardware waveform recording and playback for up to 500,000 frames.
Users can:
- Record successive waveform events
- Replay captures continuously
- Review frames individually
- Perform measurements during playback
- Apply waveform calculations
- Decode recorded bus activity
- Compare normal and abnormal events
- Investigate intermittent faults
This function is useful when problems occur only after extended operation or under specific loading conditions.
Low-Level Signal Measurement
The DHO802 provides vertical sensitivity from:
The 500 µV/div range is digitally magnified from the 1 mV/div setting and should be considered accordingly during precision accuracy calculations.
The low vertical range supports:
- Power-rail ripple measurement
- Sensor output testing
- Low-noise amplifier analysis
- Reference-voltage testing
- Small analogue waveforms
- Audio and instrumentation signals
DC gain accuracy reaches ±1% full scale above the applicable vertical settings.
Advanced Trigger Functions
The DHO802 provides 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 functions help users isolate short pulses, timing errors, missing transitions, abnormal voltage conditions and selected serial communication events.
Serial Bus Triggering and Decoding
Serial bus triggering and decoding are standard DHO800 capabilities.
Supported protocols include:
- RS232/UART
- I2C
- SPI
- CAN
- Parallel bus decoding
The DHO802 can decode up to four protocol types at the same time. Protocol information may be displayed on the waveform or in an event table.
Serial analysis helps identify:
- Missing acknowledgements
- Invalid data
- Timing errors
- Communication interruptions
- Incorrect voltage levels
- Noise-related errors
- Physical-layer faults
CAN decoding supports speeds up to 5 Mb/s and signal types including CAN_H, CAN_L, TX/RX and differential input.
Automatic Measurements and Statistics
The DHO802 supports 41 automatic waveform measurements, with up to ten measurements displayed simultaneously.
Measurement categories include:
- Maximum and minimum voltage
- Peak-to-peak voltage
- Average voltage
- RMS voltage
- Frequency
- Period
- Rise and fall time
- Positive and negative pulse width
- Duty cycle
- Overshoot and preshoot
- Slew rate
- Phase
- Delay
Measurement statistics help users evaluate signal stability and variation over repeated acquisitions.
FFT and Waveform Mathematics
The oscilloscope supports four simultaneously displayed mathematical waveforms.
Available functions include:
- 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 up to 1 Mpts and can identify up to 15 frequency peaks.
Typical FFT applications include:
- Harmonic analysis
- Switching-frequency measurement
- Clock-spectrum evaluation
- Noise-source identification
- EMI troubleshooting
- Identification of unwanted oscillations
Mask Testing and Histogram Analysis
The DHO802 includes pass/fail mask testing for repetitive waveform validation.
A pass/fail event can:
- Stop acquisition
- Activate the beeper
- Save a screenshot
- Provide test-count results
Histogram analysis supports horizontal, vertical and measurement histograms for evaluating waveform distribution and statistical behaviour.
Digital Voltmeter and Frequency Counter
The oscilloscope includes a digital voltmeter supporting:
- DC voltage
- AC RMS voltage
- AC+DC RMS voltage
It also includes a high-precision frequency counter with:
- Frequency measurement
- Period measurement
- 3 to 6 selectable digits
- 48-bit totaliser
The external trigger input can also be used as a counter source on the DHO802.
Compact and Portable Design
The DHO802 uses a compact enclosure measuring approximately:
- 265.35 mm wide
- 161.75 mm high
- 77.38 mm deep
Its weight is approximately 1.78 kg without packaging.
The instrument also supports standard monitor-arm mounting, helping reduce bench-space requirements.
USB Type-C Power
The DHO802 uses a USB Type-C power input rated at:
- 15 V DC
- 3 A
- Maximum power consumption of 45 W
This supports portable operation using a compatible power source, making the oscilloscope suitable for:
- Field maintenance
- Automotive troubleshooting
- Mobile laboratory testing
- Industrial servicing
- Remote equipment inspection
7-Inch Capacitive Touchscreen
The DHO802 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 clear access to waveforms, measurements, decoded buses and analysis functions.
Connectivity and Remote Operation
Standard connectivity includes:
- USB 2.0 Host
- USB 2.0 Device
- 10/100 LAN
- LXI-C
- HDMI 1.4 output
- AUX output
- Web Control
- External trigger input
- Probe compensation output
Web Control allows the oscilloscope interface to be accessed through a compatible browser. SCPI and IEEE 488.2 command support allow integration into automated test systems.
No Digital Logic Channels or Built-In AFG
The DHO802 is a two-channel analogue digital oscilloscope.
It does not include:
- 16 digital logic channels
- A built-in function or arbitrary waveform generator
- Bode plot analysis
Users requiring four analogue channels should consider the DHO804, while users requiring mixed-signal capability or an integrated signal source should evaluate a suitable DHO900-series model.
Applications
The RIGOL DHO802 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 test and measurement instruments for electronics development, research, education, industrial testing and maintenance.
Technical selection assistance can include:
- DHO802 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
