Mixed signal oscilloscope


Yokogawa has launched the DLM5000, a new-generation mixed signal oscilloscope with options for four or eight analogue inputs. The new oscilloscope is the successor to the previous eight-channel DLM4000. With redesigned hardware, the DLM5000 offers major improvements in both performance and operability, including a sampling rate double that of the DLM4000.

Designed to be supremely adaptable and flexible, the DLM5000 is said to meet the exacting needs of companies in industries such as mechatronics, power electronics, automotive, aerospace, railway and consumer electronics.

The DLM5000 is suitable for developing high-performance and intelligent power-semiconductor technologies and mechatronics applied in modern electric vehicles, motor controls and energy-efficient electronic designs. The flexibility these users need is achieved with up to eight analogue channels and 32 bits of logic, together with additional maths channels, vehicle serial-bus analysis and numerous other features.

A large number of channels are key to developing efficient and reliable high-performance electric motors. Based on modern inverters, successful development of these motors demands multi-channel high-speed waveform measurement. This type of measurement often needs more than four channels, which is why the DLM5000 offers eight true analogue inputs, giving engineers the tools they need for convenient and comprehensive measurement.

The DLM5000’s capabilities also make it ideal for the development of electronic control units (ECUs) for mechatronic systems, it is claimed. In this application, numerous I/O analogue, digital and serial-bus waveforms need to be measured. With the ability to monitor eight analogue channels and up to 32 bits of logic input, 16 as standard plus 16 optional, while simultaneously performing protocol analysis such as UART, I2C, SPI, CAN, CAN FD, LIN, CXPI, SENT and FlexRay, the DLM5000 can speed up development when four channels are not enough.

Additionally,  DLMsync, the new feature that will be available soon, allows two DLM5000s to be linked and work together, extending measurements to gain even more information about the performance and behaviour of electronic systems. With this feature, connecting two DLM5000s with a dedicated cable enables sampling clock and trigger synchronous measurement of up to 16 analogue channels (8 + 8) plus 64-bit logic. Alternatively, the eight-channel and four-channel models of the DLM5000 can be connected to give a configuration of ‘8 + 4 = 12 channels’.

The DLM5000 can be used as an eight-analogue and 16-digital input mixed signal oscilloscope, with all channels able to be used simultaneously. With the /L32 option, up to 32 logic signals can be measured. Also included are a bus/state display and an optional DA calculation function, useful for evaluating AD/DA converters.

The DLM5000 features low residual noise, extensive voltage ranges and a variety of real-time low-pass filters to ensure signal fidelity.

Ease of use was another design objective for the DLM5000. It combines a large, highly responsive 12.1" touchscreen, allowing easy monitoring of waveforms, not only when inputting eight channels but also when the number of waveforms is increased by calculation or zooming. In addition to the touchscreen, the DLM5000 also provides a traditional oscilloscope panel, allowing users to easily navigate through the unit’s wealth of analysis features.

Managing and accessing data is made easy through the DLM5000’s large memory, which can save up to 100,000 captured waveforms. With the history function, the user can display one or all of the captured waveforms on screen and perform cursor measurement, computation and other operations. The history function allows for analysis of rarely-occurring abnormal signals, even when an appropriate trigger condition is hard to find because its waveform shapes are not constant. Numerous methods can be used to search for waveforms meeting characteristics defined by the user, while users can also automatically play back, pause, fast forward and rewind the waveform history record.

The DLM5000 offers dedicated serial analysis function options (/F01 to /F05) for embedded systems and in-vehicle bus signals, along with decode display analysis. The logic input can also be used for specific serial buses, including I2C, SPI, UART and SENT. Complicated trigger and decode settings such as bit rate and threshold level are automatically detected.

Simultaneous analyses of four different buses can be carried out, with waveforms and analysis results from buses with different speeds being displayed using dual zoom windows.