The company has developed a "Data Stream Engine", developing two original ICs as dedicated components of the DL7100s Data Stream Engine architecture. The Data Stream Engine executes high-speed processing of the large amounts of data acquired by the DL7100's large memory.
General purpose digital signal processors (DSPs) used in most digital storage oscilloscopes slow down drastically when using long memory to acquire large amounts of data. Both the screen update rate and key operation response are affected and can become very slow. Critical data is missed and scope operation becomes frustrating.
The Data Stream Engine has three data buffers to split the processing into sorting, computing and data-view phases for pipeline processing. A 32-bit wide data bus is used for communication with the acquisition memory and data processing memory. This architecture enables the DL7100 to maintain a high-speed screen update rate with long memory and multi-channel waveform display. The DL7100 can maintain a display rate of 30 displays/sec even with 1 Mword of memory.
High bandwith and fast sampling are important specifications, but long memory is critical when users need to see high-speed events which occur over a long time window. With 8 MW of memory users can sample at GS/s even with a time window of 10msec. Users can use the Envelope mode of the DL7100 and peak detect high frequency signal components at very slow time/div ranges. The new Serial Pattern Search function makes it easy to locate specified signal anomalies in the long memory.
The unit also has History Memory with a new Search mode. This unique DL feature, which lets the user look back in time at previous acquisitions, has proven extremely useful when trying to understand random behavior in complex circuits. The search function makes it easy to find the record which contains the problem waveform.
Logic inputs allow you to trigger on and view mixed analog and logic signal combinations. Users can have four analog inputs and 16 logic inputs. Users can get correlation between control signals and the analog performance of a circuit all with one instrument and on one display.
Users can use the roll mode at very slow sweep speeds in conjunction with the zoom function to locate problem areas and see just where the problem are in the total waveform. The DL7100 has an easy-to-use zoom function with one or two independent zoom windows which can be quickly set up and displayed.
Yokogawa Corporation of America, 2 Dart Rd., Newnan, GA 30265-1040. Tel: 770-253-700 or 800-258-2552. Fax: 770-251-2088.