RIGOL MHO934 Oscilloscope, 350 MHz, 4 GSa/s, 4 CH, 7-inch Display

The RIGOL MHO934 Mixed-Signal Oscilloscope is the 350 MHz model in the MHO900 Series. It is designed for engineers, technicians, research laboratories, educational institutions and electronics manufacturers that require accurate analogue acquisition together with digital logic and serial bus analysis.

Built around a 12-bit acquisition system, the MHO934 provides 4,096 vertical quantisation levels. This gives it 16 times more amplitude levels than a conventional 8-bit oscilloscope, helping users observe low-amplitude variations, power-rail ripple, noise, overshoot and fine waveform structures more clearly.

The MHO934 combines:

• 350 MHz analogue bandwidth
• Four analogue input channels
• 12-bit hardware vertical resolution
• Up to 16-bit High Resolution processing
• Up to 4 GSa/s real-time sampling
• 100 Mpts standard maximum memory
• Optional memory up to 500 Mpts
• Up to 1,000,000 wfms/s waveform capture
• 16 digital channels with the PLA2216 probe
• Standard embedded and automotive bus decoding
• Optional dual-channel 50 MHz or 100 MHz waveform generator
• 7-inch capacitive multi-touch display

Its compact enclosure makes it suitable for space-limited engineering benches, educational laboratories, production stations and portable testing.

350 MHz Analogue Bandwidth

The MHO934 provides 350 MHz analogue bandwidth across all four analogue input channels.

Unlike the higher-bandwidth MHO954 and MHO984 models, the MHO934 maintains its rated 350 MHz bandwidth when three or four analogue channels are active.

The 350 MHz bandwidth supports applications such as:

• Embedded processor debugging
• Microcontroller development
• FPGA and CPLD testing
• Digital clock analysis
• Automotive communication buses
• Switching power converters
• Industrial control electronics
• Communication interface testing
• Fast pulse measurement
• General signal-integrity troubleshooting

The calculated rise time for a 350 MHz oscilloscope is approximately 1 ns, based on the conventional 0.35/bandwidth relationship.

Four Analogue Channels

The four analogue channels allow engineers to acquire and compare several related signals on a common time base.

Typical four-channel measurements include:

• Clock, data, enable and reset signals
• Circuit input and output waveforms
• Multiple power rails
• Gate, drain and current waveforms
• Sensor and actuator signals
• Transmit and receive communication lines
• Multi-phase converter signals
• Analogue control and feedback signals

The MHO934 supports both 1 MΩ and 50 Ω input impedance. This allows it to work with conventional passive probes, active probes and direct 50 Ω signal connections.

12-Bit Vertical Resolution

The MHO934 uses a 12-bit analogue-to-digital converter that provides 4,096 amplitude levels.

The higher vertical resolution improves waveform visibility when measuring:

• Power-supply ripple
• Sensor outputs
• Low-amplitude analogue signals
• Reference voltages
• Audio waveforms
• Power-integrity disturbances
• Switching-device behaviour
• Small signals riding on larger DC levels

Compared with an 8-bit oscilloscope, the MHO934 provides finer voltage quantisation and makes closely spaced signal amplitudes easier to distinguish.

Up to 16-Bit High Resolution Mode

The oscilloscope supports High Resolution processing up to 16 bits.

High Resolution mode can reduce visible random noise and improve low-frequency waveform clarity through digital processing.

It is useful for:

• Precision voltage measurements
• Power-rail ripple analysis
• Low-level sensor testing
• Reference-voltage evaluation
• Audio circuit analysis
• Noise-sensitive analogue measurements

Available bandwidth and sample-rate performance may decrease as higher-resolution modes are selected.

Channel-Dependent Sample Rate

The MHO934 provides a maximum real-time sample rate of up to 4 GSa/s.

The available sample rate depends on the number of enabled analogue channels:

The product should therefore be described as providing up to 4 GSa/s, rather than 4 GSa/s simultaneously across all four analogue channels.

High-speed sampling helps preserve signal detail when analysing:

• Fast edges
• Narrow pulses
• Clock signals
• Switching transitions
• Serial communication
• Overshoot and ringing
• Timing relationships
• Intermittent glitches
•  

Deep Acquisition Memory

The MHO934 includes up to 100 Mpts standard acquisition memory. An optional memory upgrade expands the maximum depth to 500 Mpts.

Memory is allocated according to the number of enabled analogue channels:

Deep acquisition memory allows engineers to capture longer signal records while retaining enough sample detail for waveform expansion and analysis.

Typical applications include:

• Long serial bus acquisitions
• Power-up sequence testing
• Embedded-software debugging
• Intermittent fault analysis
• Communication packet capture
• Extended waveform monitoring
• Multi-cycle timing measurements
• Detailed waveform zooming

The product page should state 100 Mpts standard and up to 500 Mpts optional, while explaining that memory depth is shared according to the active-channel configuration.

Fast Waveform Capture

The MHO934 provides:

• Up to 30,000 wfms/s in Vector acquisition mode
• Up to 1,000,000 wfms/s in fast recording mode

The maximum capture rate applies under specified single-channel and short-memory acquisition conditions.

Fast waveform capture reduces acquisition dead time and improves the probability of detecting uncommon signal events such as:

• Rare glitches
• Runt pulses
• Signal dropouts
• Timing violations
• Intermittent noise
• Unstable clock behaviour
• Abnormal transitions
• Occasional protocol errors

The digital phosphor display uses 256-level intensity grading to distinguish frequently occurring waveform activity from rare events.

Hardware Waveform Recording

The MHO934 supports hardware waveform recording and playback of up to 500,000 frames.

Recorded acquisitions can be reviewed frame by frame or played as a continuous sequence.

Waveform recording helps users:

• Capture intermittent signal events
• Review individual acquisitions
• Compare normal and abnormal waveforms
• Analyse faults after extended testing
• Decode previously recorded bus activity
• Perform unattended circuit monitoring

Peak Detect acquisition can capture narrow glitches under supported measurement conditions.

Mixed-Signal Capability

The MHO934 supports 16 digital channels when used with the optional RIGOL PLA2216 logic analyser probe.

The digital channels can be displayed on the same time base as the four analogue channels, allowing users to correlate electrical waveform behaviour with digital logic activity.

Mixed-signal testing is useful for:

• Microcontroller debugging
• FPGA validation
• Parallel bus analysis
• ADC and DAC testing
• Embedded control-system development
• State-machine troubleshooting
• Robotics and automation
• Digital power systems
• Analogue-to-digital timing correlation

The oscilloscope contains the mixed-signal capability, but the PLA2216 logic probe must be ordered separately.

Standard Serial Bus Decoding

The MHO934 includes standard triggering and decoding for:

• Parallel bus
• RS232/UART
• I²C
• SPI
• LIN
• CAN

Up to four protocol decoders can be displayed simultaneously.

Serial bus analysis displays decoded data together with the underlying electrical waveform. This helps engineers identify:

• Incorrect addresses
• Invalid data
• Missing acknowledgements
• Frame errors
• Timing problems
• Communication interruptions
• Intermittent bus faults

Protocol sources can be selected from analogue channels or digital channels when the PLA2216 probe is connected.

Optional Protocol Analysis

Additional protocol-analysis options are available for:

• CAN FD
• FlexRay
• I²S
• MIL-STD-1553B

These options extend the MHO934 for specialised automotive, audio and aerospace applications.

Optional protocol licences should be selected according to the interfaces used in the device under test.

Advanced Trigger Functions

The MHO934 provides multiple trigger types for isolating specific waveform conditions.

Available trigger functions include:

• Edge
• Pulse width
• Slope
• Video
• Pattern
• Duration
• Timeout
• Runt
• Window
• Delay
• Setup and hold
• Nth edge
• Serial bus triggering

Advanced trigger modes help engineers capture the fault of interest instead of manually reviewing large numbers of normal acquisitions.

Waveform Search and Navigation

Search and navigation tools help users locate events inside long memory records.

Search conditions can include:

• Edge transitions
• Pulse-width violations
• Runt pulses
• Logic patterns
• Timing conditions
• Serial bus events

Matching results are marked within the acquisition record, allowing users to move directly between abnormal events.

Automatic Measurements and Analysis

The MHO934 provides a broad range of automatic measurement and waveform-analysis functions.

Available capabilities include:

• Voltage measurements
• Frequency and period
• Rise and fall time
• Pulse width
• Duty cycle
• Overshoot and preshoot
• Phase measurement
• Channel delay
• Measurement statistics
• Cursor measurements
• FFT frequency analysis
• Waveform mathematics
• Digital filtering
• Histogram analysis
• Mask testing
• Pass/fail testing
• Digital voltmeter
• Frequency counter
• Waveform recording and playback

These tools support general circuit debugging, repetitive verification and production testing.

Optional Dual-Channel Waveform Generator

The MHO934 supports two optional integrated function and arbitrary waveform generator configurations:

• MHO900-AFG50: Two channels with sine-wave output up to 50 MHz
• MHO900-AFG100: Two channels with sine-wave output up to 100 MHz

Both options provide:

• Two output channels
• 1 GSa/s sampling
• 16-bit vertical resolution
• 16 kpts arbitrary waveform length
• Built-in and user-defined waveforms
• Sine, square, ramp, noise and DC output
• Arbitrary waveform generation

Maximum output frequency depends on the selected waveform type.

The integrated generator can be used for:

• Circuit stimulation
• Filter testing
• Amplifier analysis
• Sensor simulation
• Clock generation
• Embedded-system development
• Frequency-response testing

RIGOL’s user guide confirms that the MHO934 supports the optional dual-channel 50 MHz and 100 MHz generator functions.

Bode Plot Analysis

With an optional AFG installed, the MHO934 supports Bode plot analysis.

The Bode plot function can measure:

• Gain response
• Phase response
• Filter characteristics
• Amplifier frequency response
• Crossover frequency
• Gain margin
• Phase margin
• Power-supply control-loop response

The supported Bode sweep extends from 10 Hz to a maximum stop frequency of 30 MHz.

Power-supply loop testing may require suitable probes, cables and an injection transformer.

Low-Level Signal Measurement

Vertical sensitivity depends on the selected input impedance:

The 200 μV/div setting supports low-level measurements such as:

• Power-rail ripple
• Sensor outputs
• Reference-voltage noise
• Audio signals
• Low-amplitude control signals
• Power-integrity disturbances

Probe attenuation, grounding, input loading, bandwidth limitation and environmental interference should be considered when measuring very small signals.

7-Inch Multi-Touch Display

The MHO934 includes a 7-inch capacitive multi-touch display with:

• 1024 × 600 resolution
• 16:9 aspect ratio
• 256-level intensity grading
• Touch-based waveform navigation
• Gesture-controlled zoom
• Touch cursor positioning
• Flex knob operation

The compact screen and enclosure make the instrument suitable for crowded workbenches and portable engineering applications.

Connectivity and Remote Control

Standard connectivity includes:

• USB Host
• USB Device
• 100 Mbps LAN
• HDMI output
• Web Control
• SCPI remote programming

These interfaces support:

• USB storage
• PC communication
• Automated test integration
• External monitor connection
• Screenshot and waveform transfer
• Browser-based remote operation
• Network control

Wireless accessory compatibility and regional availability should be confirmed before ordering.

Applications

The RIGOL MHO934 is suitable for:

• Embedded-system development
• Microcontroller debugging
• FPGA and CPLD testing
• Mixed-signal analysis
• Digital circuit testing
• Serial protocol debugging
• CAN and LIN analysis
• Automotive electronics
• Industrial control systems
• Robotics and automation
• Switching power supplies
• Power electronics
• Sensor signal measurement
• Audio electronics
• Research and development
• Production validation
• Educational laboratories
• Service and repair
• Portable field testing
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Why Buy from Revine Tech

Revine Tech supplies RIGOL oscilloscopes, logic probes, protocol-analysis options, waveform-generator upgrades and measurement accessories for professional electronics testing.

Technical selection support can include:

• Oscilloscope bandwidth selection
• Analogue and digital channel requirements
• PLA2216 logic probe selection
• Memory-depth upgrades
• Embedded protocol analysis
• CAN FD and FlexRay options
• Audio and aerospace bus analysis
• AFG50 or AFG100 selection
• Bode plot accessories
• Passive voltage probes
• High-voltage differential probes
• Current probes
• Remote-control integration
• Calibration and documentation