1. Introduction
This manual provides essential information for the safe and effective operation of your RIGOL DHO914S Digital Oscilloscope. The DHO914S is a high-performance digital oscilloscope designed for various measurement and analysis tasks, featuring a 125MHz analog bandwidth, 12-bit vertical resolution, and a maximum real-time sample rate of 1.25 GSa/s. It includes 4 analog channels and a built-in signal generator, making it a versatile tool for electronic testing and development.
Figure 1: Front view of the RIGOL DHO914S Digital Oscilloscope, showing the display and control panel.
2. Setup
2.1 Unpacking and Inspection
Carefully unpack the oscilloscope and all accessories. Inspect the device for any signs of damage during transit. If any damage is found, contact your dealer immediately.
Figure 2: Contents of the DHO914S packaging, including the host unit, four probes, power cable, data cable, grounding wire, and certificates.
The standard accessories include:
- RIGOL DHO914S Host Unit
- Power Cable (approx. 1.5m)
- USB Cable (approx. 1.5m)
- Grounding Wire (approx. 1.0m)
- Probes x 4 (150MHz)
- Certificates and Documentation
2.2 Power Connection
The DHO914S supports Type-C power input, allowing for flexible power options, including portable power sources for on-site testing. Connect the provided power cable to the Type-C port on the rear panel and then to a suitable power outlet.
Figure 3: The DHO914S oscilloscope powered via a Type-C connection, demonstrating its portability.
2.3 Probe Connection
Connect the included passive probes to the BNC input connectors on the front panel. Ensure a secure connection. For accurate measurements, it is recommended to compensate the probes before use. Refer to the on-screen menu for probe compensation procedures.
2.4 Physical Placement
The DHO900 series features a compact form factor. It also supports standard monitor stand usage via a VESA mount, which can help reduce desktop footprint and provide more workspace.
Figure 4: The DHO914S oscilloscope mounted on a VESA-compatible arm, illustrating its sleek design and space-saving capabilities.
3. Operating Instructions
3.1 Power On/Off
Press the power button located on the front panel to turn the oscilloscope on or off. The device may take approximately 30 seconds to boot up.
3.2 User Interface
The DHO914S features a 7-inch 1024 x 600 high-definition touchscreen for intuitive interaction. Most functions can be accessed directly via touch gestures or the physical control knobs and buttons.
Figure 5: The 7-inch 1024x600 high-definition touchscreen of the DHO914S, highlighting its interactive display.
A new Flex knob provides a user-friendly operating experience, allowing for quick adjustments and navigation through menus.
3.3 Basic Measurements
Connect your signal source to the desired analog channel using a compensated probe. Use the vertical and horizontal controls to adjust the waveform display. The 12-bit vertical resolution ensures precise signal representation, even for small signals.
The Ultra Aqua mode provides a waveform capture rate of up to 1 million wfms/s, enabling the capture of transient events and rare anomalies.
3.4 Built-in Signal Generator
The DHO914S includes a 1-channel built-in arbitrary waveform/function generator. Access this function through the menu to generate various waveforms for testing circuits.
3.5 Connectivity
The DHO914S comes standard with USB Device&Host, LAN, and HDMI ports. These interfaces support remote control, data transfer, and display output for collaborative work or presentations.
Figure 6: The DHO914S connected to a laptop via its versatile interfaces, including USB, LAN, and HDMI, for remote control and data display.
Figure 7: Rear panel of the DHO914S, showing the AFG OUT, AUX OUT, LXI, LAN, USB DEVICE, HDMI, and USB-C ports.
4. Maintenance
4.1 General Care
Keep the oscilloscope clean and free from dust. Use a soft, dry cloth for cleaning the exterior. For the screen, use a soft, lint-free cloth specifically designed for electronic displays. Avoid using abrasive cleaners or solvents.
4.2 Firmware Updates
The DHO914S supports online version upgrade functionality. Regularly check the official RIGOL website for the latest firmware updates to ensure optimal performance and access to new features.
5. Troubleshooting
5.1 Common Issues and Solutions
- Long Startup Time: The device typically takes around 30 seconds to boot. This is normal operation.
- Fan Noise: The internal fan operates to maintain optimal temperature. Some fan noise is normal. Ensure proper ventilation around the device.
- Waveform Offset/Bias: If a channel displays an unexpected offset, perform a self-calibration. Navigate to the system settings and initiate the self-calibration procedure. Ensure probes are correctly grounded.
- No Signal Display: Verify that probes are securely connected to both the oscilloscope and the signal source. Check probe compensation and input settings for the active channel. Ensure the signal source is active.
- Device Not Responding: If the device becomes unresponsive, perform a hard reset by holding the power button until it shuts down, then restart. If the issue persists, contact technical support.
6. Specifications
| Feature | Specification |
|---|---|
| Model | DHO914S |
| Analog Bandwidth | 125 MHz |
| Vertical Resolution | 12-bit (hardware) |
| Analog Channels | 4 |
| Digital Channels | 16 (optional) |
| Real-time Sample Rate | Up to 1.25 GSa/s |
| Storage Depth | Up to 50 Mpts |
| Vertical Sensitivity Range | 200 µV/div to 10 V/div |
| Waveform Capture Rate | Up to 1,000,000 wfms/s (Ultra Aqua mode) |
| Display | 7-inch 1024 x 600 HD Touchscreen |
| Built-in Functions | Arbitrary Waveform/Function Generator, Birdon Plot Analysis, Histogram, Digital Signal Analysis |
| Interfaces | USB Device&Host, LAN, HDMI, USB-C (Power) |
| Dimensions (L x W x H) | 10.45 x 3.05 x 6.37 inches (265.36 x 77.38 x 161.75 mm) |
| Weight | 3.92 lbs (1.78 kg) |
7. Warranty and Support
7.1 Warranty Information
The main body of RIGOL equipment, including the DHO914S, comes with a standard 3-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. For detailed warranty terms and conditions, please refer to the official RIGOL warranty policy document or contact customer support.
7.2 Technical Support
For technical assistance, troubleshooting, or service inquiries, please contact RIGOL Technologies USA Inc. or your local authorized dealer. You can find contact information and additional resources on the official Rigol Store or the manufacturer's website.
