TEST & MEASUREMENT FEATURE
ADVANCED TESTING FOR THE NEXT GENERATION OF AUTOMOTIVE
Kelvin Hagebeuk, marketing manager of test & measurement at Yokogawa Europeexplores the advanced capabilities of the latest mixed-signal oscilloscope, targeted at advanced automotive testing
P
rerequisites for the latest mixed Signal Oscilloscope (MSO) might
include the flexibility of a MSO with the capability for serial bus when it comes to testing in-vehicle buses, along with perhaps dedicated power supply analysis capabilities for testing inverters and other drive-train components of electric and hybrid vehicles. This is exactly what the new Yokogawa DLM3000 Series features. Staying with the familiar “look and feel” and small footprint of the company’s earlier MSO series, this latest range comes with a complete hardware redesign with higher measurement speed and precision plus an intuitive touchscreen display for enhanced ease of use and improved productivity. All these features help towards understanding the increasingly complex systems used in today’s automobiles and the development of next-generation road vehicles, as well as similar developments in other modes of transport. The DLM3000 is described as a holistic
instrument that can be used in the key areas of power electronics and hybrid electric vehicle drive trains; CAN (FD), LIN bus and SENT monitoring; and vehicle components and Intelligent Transport Systems (ITS).
MIXED-SIGNAL CAPABILITY In the multi-channel mixed-signal capability of this series, the fourth analogue input channel can be converted into 8-bit logic, so that the instrument functions as a 3-channel analogue oscilloscope combined with an 8-bit logic analyser. As a result, up to 11 input signals can be observed simultaneously as three channels of analogue signals and an 8-bit logic input. This means that the DLM3000 can be used not only for the observation of data and control signals, or as a trigger source, but also for the logic input analysis of I2
C,
SPI, UART and SENT buses. This is said to remove the limitations imposed by the four channels of a standard oscilloscope in applications where the functioning of multi-channel digital control circuits needs to be examined.
(/F01 to /F05) are available for embedded systems and in-vehicle bus signal analysis such as I2
C, SPI, CAN, CAN
FD, LIN, SENT and others. The logic input can also be used for some specific serial buses. Complicated trigger and decode settings such as bit rate and threshold level are automatically detected using the auto setup function. 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. The memory capacity of up to
This range combines a touchscreen
display with internal hardware that offers low residual noise, extensive voltage ranges and a variety of real-time lowpass filters to ensure the fidelity of signals. Channel count and memory depth options, combined with optional power maths and serial bus capabilities, are further features. The combination of a touchscreen with a
traditional panel of oscilloscope controls allows users to easily navigate between the conventional and mixed-signal modes of operation; while communication and storage options make it easy to access large data sets.
PRECISION WAVEFORM ANALYSIS This range has a bandwidth of up to 500MHz and a high sampling rate of 2.5GS/s, making it ideally suited for precision waveform analysis in measurements on fast switching signals in inverter drives. The high sample rate is combined with an onboard memory capacity of up to 500Mpoint, increased voltage range and lower voltage per division range, leading to lower residual noise and increased sensitivity. Dedicated serial
analysis function options / ELECTRONICS Figure 1 & 2:
Yokogawa DLM3000 MSO
500Mpoint allows the instrument to maintain its high sample rate in long- term measurements. A zoom and search function allows the user to select and display two zoomed waveforms, with different time axis scales, simultaneously. Searching captured waveforms in the long memory and displaying waveforms enable it to meet a wide of range of search criteria in the zoom area.
ENHANCED FUNCTIONALITY A history memory function automatically saves up to 100,000 previously captured waveforms in the acquisition memory and subsequently displays just one or all of them on screen. The user can then perform cursor measurement, computation, and other operations on history waveforms, allowing rarely occurring abnormal signals to be analysed. The DLM3000 Series comes with a
variety of easy-to-configure triggers combining analogue and logic inputs such as edge, enhanced, and B triggers. A digital trigger system is employed so that trigger error is small. Integrating the latest in touchscreen operation, solid-state storage, and high- speed signal processing, the DLM3000 provides clean signals, extensive processing, and ease of operation.
Yokogawa Europe
www.yokogawa.com/uk T: 01928 597200
ELECTRONICS | DECEMBER/JANUARY 2019 15
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