Mixed signal oscilloscope enhances memory and firmware
15 July 2014
Yokogawa's DLM2000 mixed-signal oscilloscope has been enhanced with longer memory capabilities and firmware improvements.
In the new version, the length of the acquisition memory has been increased up to 62.5Mpoints in the standard unit and up to 250Mpoints with the extended memory option. This means that, with the maximum memory installed (/M3 option), in single-shot mode, a 10kHz signal lasting for more than one hour can be captured. The same memory can capture a 200ms signal at a sample rate of 1.25Gsample/s.
The built-in flash memory capacity has also been increased from 0.1Gbyte to 0.33Gbyte, while a new extended memory option has a capacity of 7.2Gbyte.
Enhancements to the history memory function are also included. This capability can capture and replay many individual acquisitions that can be displayed one at a time or as an accumulation. Using search and measurement functions, abnormal signals can be isolated, analysed and categorised without the need to carefully configure triggers to capture rare events.
The maximum number of history waveforms is increased from 20,000 to 50,000 and the default setting allows all stored waveforms are displayed by a single click of the "history" key. The zone search function now includes an intuitive search function covering the whole of the history waveform and is 20 times faster than the original version, says the company.
Together with a maximum continuous acquisition rate of 20,000 waveform/s, which increases to approximately 450,000 in N single mode, the history memory enables abnormal signals to be captured without needing to know what makes them different
Firmware packages are available as separate items which customers can purchase and install rather than as factory-fitted options. Firmware packages include dedicated software for power-supply analysis as well as analysis of popular serial buses including automotive CAN/LIN and FlexRay trigger and analysis.
There are two or four channel models, with up to 500MHz bandwidth and 2.5Gsample/s sampling speed as well as the longest memory and fastest update rate (up to 450,000 waveform/s) in this class of instrument. As well as a combination of analogue and digital inputs, there is a large-screen display in a compact ergonomically styled body.
Search and cursor/parameter measurement capabilities enable users to see the waveform detail of two parts of the acquisition which can be separated by a long time period. It is possible to find, measure and analyse the details of the cause and effect of an abnormality which could be on the same or different input channels. They also make it possible to view and compare the details and timings of different serial buses which are running at different speeds.
Users can automatically or manually split the display to separate individual channel waveforms while maintaining full resolution and dynamic range, to see the details of all signals regardless of the number of channels in use.
The user can choose to capture a mix of analogue and more digital signals, at the push of a button. Digital channels can also be used to analyse I²C, SPI and UART serial buses while keeping the analogue channels available for other signals.
The hardware optimised architecture and dedicated ScopeCORE IC enable measurements and signal processing to be carried out in real time.
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