RIGOL DHO900 Series Digital Oscilloscope

1. Introduction

The RIGOL DHO900 series represents a new generation of high-performance, economical digital oscilloscopes. Despite its compact design, it delivers superior performance, featuring a capture rate of up to 1,000,000 wfms/s (in UltraAcquire Mode), a 50 Mpts memory depth, 12-bit resolution, and a low noise floor. This series supports 16 digital channels, allowing for comprehensive analysis of both analog and digital signals, making it ideal for embedded design and testing scenarios. It offers advanced functions such as auto serial and parallel bus analysis, Bode plot analysis, and more, catering to the demands of R&D, education, and scientific research.

2. Product Features

• Ultra-low noise floor for purer signal acquisition, ensuring small signals are not missed.
• Up to 12 bits vertical resolution across all models in the series.
• Maximum analog bandwidth of 250 MHz with 4 analog channels.
• Includes 16 standard digital channels (requires PLA2216 logic analysis probe, sold separately).
• Maximum real-time sample rate of 1.25 GSa/s.
• Maximum memory depth of 50 Mpts.
• Vertical sensitivity range: 200 μV/div to 10V/div.
• Maximum capture rate of 1,000,000 wfms/s in UltraAcquire mode.
• Digital phosphor display with real-time 256-level intensity grading.
• Integrates Arbitrary Function Generator (AFG), Bode plot analysis, histogram, and digital signal analysis functions.
• Waveform search and navigation function for faster debugging of signal anomalies.
• 7-inch (1024x600) capacitive multi-touch screen for intuitive operation.
• Innovative Flex Knob for enhanced user experience.
• Standard USB Device & Host, LAN, and HDMI interfaces for all models.
• Compact and delicate industrial design, easy to operate.
• Supports unique online firmware upgrades.

3. Package Contents

Upon receiving your RIGOL DHO900 series oscilloscope, please verify that all items listed below are included and in good condition:

• RIGOL DHO900 Series Digital Oscilloscope (selected model)
• Passive Probes (quantity depends on model, typically one per analog channel)
• Power Adapter and Power Cord (appropriate for your region)
• USB Cable
• Quick Guide / Safety Information
• Calibration Certificate (may vary by region/seller)

Note: The PLA2216 logic analysis probe for digital channels is sold separately.

4. Initial Setup

4.1 Powering On

The DHO900 series oscilloscope can be powered via its Type-C power interface. Connect the provided power adapter to the Type-C port on the rear of the device, then plug the adapter into a suitable power outlet. Alternatively, for on-site testing, the device can be powered by a portable power source (e.g., a power bank) connected to the Type-C port.

4.2 Connecting Probes and Cables

• Analog Channels: Connect the passive probes to the BNC connectors on the front panel (labeled 1, 2, 3, 4). Ensure a secure connection.
• Digital Channels (Optional): If using the PLA2216 logic analysis probe, connect it to the dedicated LA port on the front panel.
• Rear Panel Connections:
  • USB Device & Host: For connecting to a computer or external storage devices.
  • LAN: For network connectivity.
  • HDMI: For connecting to an external display.
  • AFG OUT / AUX OUT: For outputting arbitrary function generator signals or auxiliary signals (available on 'S' models).

4.3 Mounting Options

The DHO900 series features a compact form factor and supports standard monitor stand usage, which can help reduce desktop footprint and provide more workspace.

5. Operating Instructions

5.1 User Interface and Controls

The DHO900 series features a 7-inch (1024x600) capacitive multi-touch screen for intuitive interaction. Physical controls, including the innovative Flex Knob, provide precise adjustments for vertical, horizontal, and trigger settings. Key buttons for common functions like Measure, Cursor, Analyze, Auto, Default, Single, Run/Stop, and Clear are easily accessible.

5.2 Key Operating Features

• 12-bit Vertical Resolution: This feature provides 4096 levels of quantization, significantly improving the accuracy of measurements, especially for small signals, compared to standard 8-bit oscilloscopes.



• UltraAcquire Mode: Achieve a maximum waveform capture rate of 1,000,000 wfms/s to quickly identify infrequent events and glitches.
• Digital Phosphor Display: Visualize signal activity with real-time 256-level intensity grading, highlighting frequently occurring waveforms.
• Bode Plot Analysis (DHO900S Series): The 'S' models include a standard Bode plot loop analysis function, essential for analyzing the frequency response of switching power supplies and control systems.



• Digital Channels: All DHO900 series models are equipped with digital channels for mixed-signal analysis. When combined with the PLA2216 logic analysis probe, you can analyze digital signals alongside analog waveforms.



• Waveform Search and Navigation: Utilize advanced search and navigation features to quickly locate and analyze specific signal anomalies within long acquisitions.

6. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the oscilloscope. For stubborn dirt, a slightly damp cloth with mild detergent can be used, ensuring no liquid enters the device. Do not use abrasive cleaners or solvents.
• Screen Care: The capacitive multi-touch screen should be cleaned with a soft, lint-free cloth. Avoid using sharp objects on the screen.
• Ventilation: Ensure the ventilation openings on the rear and sides of the instrument are clear of obstructions to prevent overheating.
• Storage: When not in use for extended periods, store the oscilloscope in a clean, dry environment, away from direct sunlight and extreme temperatures.
• Firmware Updates: Periodically check the official RIGOL website for firmware updates to ensure optimal performance and access to new features. The device supports unique online upgrades.

7. Troubleshooting

• Device Does Not Power On:
  • Check if the power adapter is securely connected to both the oscilloscope and the power outlet.
  • Ensure the power outlet is functional.
  • If using a portable power source, verify it is adequately charged and providing sufficient power.
• Display Language is Incorrect (e.g., Chinese):
  • Navigate through the menu options to find the 'System' or 'Settings' menu.
  • Locate the 'Language' setting and select your preferred language (e.g., English). Refer to the quick guide for visual cues if needed.
• No Waveform Display:
  • Ensure probes are correctly connected to the input channels and the circuit under test.
  • Check probe attenuation settings on both the probe and the oscilloscope.
  • Adjust vertical scale (V/div) and horizontal scale (s/div) to appropriate ranges.
  • Verify trigger settings are correctly configured (e.g., trigger level, source, slope). Use the 'Auto' button for an automatic setup.
• Unstable Waveform:
  • Adjust the trigger level to a stable point on the waveform.
  • Ensure the trigger source is set to the correct channel.
  • Check for noise in the signal path; consider using averaging or filtering functions.

8. Specifications

9. User Tips

• Language Setting: If the oscilloscope powers on with an unfamiliar language (e.g., Chinese), navigate to the system settings to change it to your preferred language. This is a common initial setup step.
• Compact Design: The DHO900 series is noted for its compact size, which can be beneficial for saving desktop space. Consider utilizing a monitor stand for an even more organized workspace.
• Low Noise Floor: Users have praised the low noise floor, which helps in capturing and analyzing small signals accurately.
• Stable Triggering: The triggering mechanism is generally stable, making it easier to capture and analyze repetitive waveforms.
• Internal Signal Generator: For models with the Arbitrary Function Generator (AFG) function, utilize it for testing circuits without needing an external signal source.

10. Warranty and Support

RIGOL provides a standard warranty for its products. For specific warranty terms, duration, and service procedures, please refer to the warranty card included with your product or visit the official RIGOL website. In case of technical issues or questions, please contact RIGOL customer support or your authorized dealer for assistance.

For the latest drivers, software, and documentation, please visit the official RIGOL website.