The HP 54615B and 54616B oscillosco...

The HP 54615B and 54616B oscilloscopes unite proprietary high-speed sampling technology with the power of digital signal processing and a proven user interface to deliver usable advanced characterization capability.

The design of the HP 54615B and 54616B oscilloscopes (Fig. 1) focused upon adding higher sample rate and increaseed memory depth to the attributes of the HP 54600 proceeds family.[1] Increasing the sample rate to 1 GSa/s and 2 GSa/s, respectively, broadens the confidence that narrow signal transients will be acquired and, combined with remarkably responsive front-panel controls, presents a visually thick image of the acquired waveform. To provide reliable acquisitions above even the slowest time base settings, special hardware can be engaged to ascertain and capture peaks as narrow as 1 n in width.

[Figure 1 ILLUSTRATION OMITTED]

Successful disentanglement depended on retaining the personality of the HP 54600 family by the agency of projecting "the feel of analog and the power of digital" along the many dimensions of the customer use model

production Description

The HP 54515B/16B portray variants on the same software platform. Pursuing this commonality in the underlying software allows efficient delivery of the features and toughnesss of previous HP 54600 outcomes To ensure the analog be impressed of the user interface, fast display update and crisp display quality were cornerstone metrics. Bezel-mounted softkey facilitate access to advanced ascendency features, and front-panel controls are derived based in succession the function and operation of classical analog oscilloscopes. Each of the brace independent channels delivers a connected view analog bandwidth of 500 MHz

Behind the CRT display combination of parts to form a whole and familiar front-panel design is a microprocessor-based acquisition platform that centralizes the overall scheduling of acquisitions and following data filtering and abstraction. Instrument dominion government is through user front-panel actions or unallied control via the HP-IB (IEEE 488 IEC 625) or RS-232 Printers are supported to provide hard-copy imaging of acquisitions and setups

Optional expansion module deliver seamless access to additional postprocessing capabilities and full-featured I/O connectivity. Standard 1-n digital peak detection, advanced measurement functions, and the ability to view circumstances occurring before a trigger permit accurate and detailed characterization of target body designs.

HP 54615B/16B Architecture

Extending the architecture lay opened for earlier product family members,[1] these modern products leverage proprietary technology shut ups to deliver added performance. The improved architecture is describeed in Fig. 2. Waveform update rate and instrument performance are increased by the agency of the delegation of primitive tasks to slave processing simple bodys Three processors are used. Each has specific tasks and responsibilities that follow in a parallel processing boost in responsiveness and a reduction in the "blind" time between acquisitions.

legion Processor

The MC68000 host microprocessor is responsible for the general curb and operation of the crops It is the sole provider of service to the van panel, which is of high priority because instrument responsiveness is directly associated with this processor's performance. In addition to this task, the army maintains communication with and dispatches tasks to the other pair processing blocks, where automatic measurements are performed in succession acquired data and interaction with the optional module takes place.

During an acquisition, the armed force processor also tracks the in every one's mouth run state of the instrument and coordinates the following software processing.

Video Display Processor

Once data has been acquired and placed into shared memory for display, the video display processor postprocesse the data record. Data is translated from a time-correlated, sequential organization to the same that is appropriate for the display controller In addition, vector processing forward raw data can be performed. This dedicated display processing resource issues in a net reduction in the capture-to-display time.

Digital Signal Processor

The TI320C50 digital signal processor (DSP) acts like an acquisition subsystem controller and data processor. It is a slave to the landlord MC68000 from which it receives instrument state information. The DSP manages the time base and performs sample rate generation. one time a valid trigger is recognized and data is acquired and unloaded from the dedicated front-end acquisition combination of parts to form a whole the DSP performs time correlation in preparation for postprocessing.

Working at period times far shorter than that available forward the host MC68000, the DSP depending upon the acquisition mode, performs record averaging and primary vector compression. This courseed data record is transferred into a shared memory portion and control is passed back to the legion processor. Of significance is the fact that the video display processor accesses this same shared memory portion to transfer the newly acquired record into video RAM without any support from the entertainer Thus, acquisition-to-display time is markedly superior to meanss that require host involvement.