1. Introduction
This manual provides essential instructions for the safe and efficient use of the RIGOL DHO914 Digital Oscilloscope. The DHO914 is a 4-channel oscilloscope featuring a 125 MHz bandwidth, 1.25 GSa/s sampling rate, 12-bit analog-to-digital converter, 50 Mpts memory depth, and a 7-inch 1024x600 pixel touchscreen display. Please read this manual thoroughly before operating the device.
2. Safety Information
Observe the following safety precautions to prevent injury and avoid damage to the instrument or any products connected to it. This device is designed for use by qualified personnel only.
- Power Source: Use only the power cable supplied with the instrument and ensure it is connected to a grounded power outlet.
- Ventilation: Ensure proper ventilation. Do not block the ventilation openings.
- Environment: Operate the instrument in a dry environment, away from moisture, dust, and direct sunlight.
- Probes: Use only probes rated for the voltage and current being measured. Ensure probes are properly connected before making measurements.
- Cleaning: Disconnect the power before cleaning. Use a soft, damp cloth; do not use abrasive cleaners or solvents.
- Servicing: Do not attempt to service the instrument yourself. Refer all servicing to qualified service personnel.
3. Setup
3.1 Unpacking and Inspection
Carefully unpack the oscilloscope and check for any signs of damage during transit. Retain the packaging materials for future transport or storage.
3.2 What's in the Box
Figure 3.2.1: Contents of the RIGOL DHO914 Oscilloscope box. The image displays two packaging boxes, the main oscilloscope unit, an EU power adapter, a USB A-B cable, a ground wire, four passive probes (150MHz), and a warranty card with calibration certificate.
The standard package for the RIGOL DHO914 includes:
- Main Unit (RIGOL DHO914 Digital Oscilloscope)
- Power Cable (EU Power Adapter)
- USB Cable (USB A-B Cable)
- Ground Wire
- Passive Probes (4 units, 150MHz)
- Warranty Card & Calibration Certificate
3.3 Product Overview
Figure 3.3.1: RIGOL DHO914 Physical Overview. This image illustrates the front panel with its 7-inch display and control buttons, the rear panel with various ports, a side view showing its slim profile, and a detailed view of the control buttons. Dimensions are indicated as 265.36mm length, 77.38mm width, and 161.75mm height, with a weight of 1.78kg.
The DHO914 features a compact design with a 7-inch high-definition touchscreen. The front panel includes the display, control knobs, and buttons for various functions. The rear panel provides connectivity options such as USB Device&Host, LAN, and HDMI ports. The device measures approximately 26.53 cm (Length) x 7.74 cm (Width) x 16.17 cm (Height) and weighs 1.78 kg.
3.4 Initial Connection
- Connect the power cable to the oscilloscope's power input and then to a grounded AC power outlet.
- Press the power button located on the front panel to turn on the device.
- Connect the passive probes to the analog input channels (CH1, CH2, CH3, CH4) as needed for your measurements. Ensure the probe compensation is correctly adjusted for accurate readings.
- Optionally, connect USB devices, LAN cables, or an HDMI display to the respective ports for extended functionality.
4. Operating Instructions
4.1 Basic Operation
Upon powering on, the oscilloscope will display the main measurement interface. The 7-inch touchscreen allows for intuitive navigation and parameter adjustment. Alternatively, use the physical buttons and knobs for precise control.
Figure 4.1.1: RIGOL DHO914 Main Features. This image shows the oscilloscope's front panel with key specifications overlaid, including 125 MHz bandwidth, 12-bit resolution, 1.25 GSa/s sampling rate, 50 Mpts storage depth, and available interfaces (USB, LAN, HDMI), all controlled via a 7-inch 1024x600 HD touch display.
4.2 Key Features and Functions
- High Resolution: The 12-bit hardware resolution ensures precise signal capture, even for small signals, due to its ultra-low background noise.
- Bandwidth and Channels: Features 125 MHz analog bandwidth across 4 analog channels. An optional 16 digital channels are available for mixed-signal analysis.
- Sampling Rate and Memory: Offers a real-time sampling rate of up to 1.25 GSa/s and a deep memory of 50 Mpts, allowing for detailed capture of long signal sequences.
- Waveform Capture Rate: The Ultra Aqua mode provides a waveform capture rate of up to 1,000,000 wfm/s, increasing the probability of capturing infrequent events.
- Display and Interface: The 7-inch 1024x600 HD touchscreen supports 256-level grayscale real-time brightness, enhancing waveform visualization. The new Flex button provides an intuitive user experience.
- Integrated Analysis Functions: The oscilloscope integrates various analysis tools, including an arbitrary waveform/function generator, birdon trace analysis, histogram, and digital signal analysis.
- Connectivity: Standard USB Device&Host, LAN, and HDMI ports facilitate data transfer, remote control, and external display connections.
- Waveform Search and Navigation: Utilize the built-in search and navigation functions to quickly identify anomalies within captured waveforms.
5. Maintenance
5.1 Cleaning
To clean the instrument, disconnect it from the power source. Use a soft cloth dampened with a mild detergent solution. Do not use abrasive cleaners, solvents, or harsh chemicals, as these may damage the casing or display. Ensure no liquid enters the instrument.
5.2 Storage
When not in use for extended periods, store the oscilloscope in a dry, dust-free environment, preferably in its original packaging or a protective case. Avoid extreme temperatures and humidity.
6. Troubleshooting
This section provides solutions to common issues. For problems not listed here, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Instrument does not power on. | Power cable not connected, power outlet faulty, power button not pressed. | Check power cable connection. Verify power outlet functionality. Press the power button firmly. |
| No waveform displayed. | Probe not connected, signal source off, vertical scale too high/low, trigger settings incorrect. | Ensure probes are connected to the signal source and oscilloscope. Verify signal source is active. Adjust vertical scale (V/div) and horizontal scale (s/div). Check trigger level and mode. |
| Waveform is unstable or noisy. | Poor probe connection, ground loop, external interference, incorrect probe compensation. | Ensure secure probe connections. Use proper grounding techniques. Minimize external electromagnetic interference. Perform probe compensation adjustment. |
| Touchscreen unresponsive. | Temporary software glitch, screen dirty. | Restart the instrument. Clean the screen with a soft, dry cloth. If the issue persists, use physical controls or contact support. |
7. Specifications
The following table outlines the key technical specifications for the RIGOL DHO914 Digital Oscilloscope.
Figure 7.1.1: RIGOL DHO914 Technical Data. This image presents a table detailing the oscilloscope's specifications: Bandwidth: 125 MHz, No. Channels: 4A+16D Logic Analyzer, Sample Rate: 1.25G Sa/s, Memory Depth: 50 Mpts, Waveform capture rate: 1,000,000 wfms/s, Vertical Resolution: 12 bit, Min. Vertical Sensitivity: 500uV/div, Min. Timebase: 2 ns/div, Decode Types: RS232/I2C/SPI/CAN/LIN, Built-in Signal Generator: Not supported.
| Parameter | Specification |
|---|---|
| Bandwidth | 125 MHz |
| Number of Channels | 4 Analog + 16 Digital (Logic Analyzer) |
| Sample Rate | 1.25 GSa/s |
| Memory Depth | 50 Mpts |
| Waveform Capture Rate | 1,000,000 wfms/s (Ultra Aqua mode) |
| Vertical Resolution | 12-bit |
| Min. Vertical Sensitivity | 500 µV/div |
| Min. Timebase | 2 ns/div |
| Decode Types | RS232, I2C, SPI, CAN, LIN |
| Built-in Signal Generator | Not supported |
| Display | 7-inch (1024x600) HD Touchscreen |
| Connectivity | USB Device&Host, LAN, HDMI |
| Dimensions (L x W x H) | 26.53 x 7.74 x 16.17 cm (10.5 x 3.0 x 6.4 inches) |
| Weight | 1.78 kg (3.9 lbs) |
| Power Source | Wired-electric |
8. Warranty and Support
8.1 Warranty Information
The RIGOL DHO914 Digital Oscilloscope comes with a standard 3-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please refer to the included Warranty Card for detailed terms and conditions.
8.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact RIGOL customer support. You can find contact information on the official RIGOL website or through your local distributor. Ensure you have your product model number (DHO914) and serial number ready when contacting support.
9. Typical Applications
The RIGOL DHO914 Digital Oscilloscope is suitable for a wide range of applications due to its high performance and versatile features.
Figure 9.1.1: RIGOL DHO914 Application Scenarios. This image displays various environments where the oscilloscope can be utilized, such as embedded development, factory production lines, instrument maintenance, educational and research settings, and automotive manufacturing.
- Embedded Development: For debugging and testing embedded systems.
- Factory Production Line: Quality control and signal integrity checks in manufacturing.
- Instrument Maintenance: Diagnostics and repair of electronic equipment.
- Education and Research: Ideal for laboratory experiments and academic studies.
- Automotive Manufacturing: Analyzing signals in automotive electronic systems.