Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you have problem concincing your costumer power of multimedia technology with music & graphic allowing you to reap maximum out of your business. This book provides a comprehensive review of precoding techniques for digital communications systems from a signal processing perspective. In the first part of the book the authors provide an overview of the principles of precoding for channels with intersymbol interference (ISI) such as Tomlinson-Harashima precoding and Trellis precoding. The second part of the book introduces the state-of-the-art precoding techniques originating from several projects and research activities involving multiuser OFDM transmissions and ultra-wideband (UWB) radio systems. You can use this feature to calibrate traces on a load board, perform rise time and fall time measurements, or even account for setup and hold times. As you can see, you can not only control different waveforms but also make onboard decisions based on triggers and events.
The NI PXIe-6547 and PXIe-6548 make it possible to expand your digital applications, whether you need higher speed, higher data throughput, or more advanced capabilities.
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The NI PXIe-6547 and PXIe-6548 are PXI Express-based instruments featuring clock rates up to 100 and 200 MHz, respectively.
Onboard hardware compare: These modules feature onboard, real-time hardware compare, which is ideal for a stimulus-response application. Multiple banks of data delay: Many digital interfaces or PCBs have multiple traces with different lengths running on them.
Moreover, you can programmatically select the synchronization offset between the two modules using the NI-TCLK API. Double data rate: You can clock data at both the rising and falling edges of the sample clock to achieve double data rate (DDR).
With the high clock rates on the NI PXIe-6547 and PXIe-6548, you can interface with faster semiconductor chips and components.
You can use the NI PXIe-6548 with an NI 2515 high-speed digital signal insertion switch to perform dynamic, linear, or parametric tests on a digital-to analog converter (DAC). At 200 MHz on 32 channels, with advanced features such as hardware compare, multiple banks of data delay, and an onboard DDS clock, these devices are ideal for a large variety of digital applications.
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You can send a stimulus waveform to a device under test (DUT) and compare response data, either on the same channel or on other input channels.

At hundreds of megahertz, small differences in trace lengths can cause skew between channels, where parallel data might not arrive at the DUT at the same time because of the skew caused by the different trace lengths. Using the per-pin, per-cycle direction control, you can communicate with protocols such as SPI and I2C or custom digital protocols. You can also synchronize multiple devices to increase channel count or synchronize multiple analog and digital devices to create a highly synchronized mixed-signal system.
There is also a complete chapter on the issue of precoding for multiple input multiple output (MIMO) channels. You can also use the onboard high-resolution direct digital synthesis (DDS) clock to achieve arbitrary clock rates for your unique applications.
The device also generates an error event, which you can use with the advanced scripting engine for real-time decision making.
These devices are mostly used as master devices on these buses, but you also can use them as slaves in certain scenarios.

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