User manual TEKTRONIX SDX100 DATASHEET

[. . . ] You can also tweak the imported touchstone file data to adjust the ISI and see how the receiver responds to those variations. The effect of the channel can also be de-embedded by selecting the Inverse filtering option. Closed EYE can be opened up by adding the right amount of pre-emphasis or by varying the rise time. [. . . ] SerialXpress enables creation of exact waveforms required for thorough and repeatable design validation, margin/characterization, and conformance testing of high-speed serial data receivers. It considerably simplifies the signal creation and jitter simulations, thus reducing overall development and test time. SerialXpress, in addition to supporting generation of jitter (Random, Periodic (Sinusoidal), Inter Symbol Interference (ISI), and Duty Cycle Distortion (DCD)), also supports Spread Spectrum Clocking (SSC), pre-emphasis, and noise addition. This allows the user to create a combination of various impairments simultaneously to stress the receiver. SerialXpress also allows the waveforms to be captured from Tektronix oscilloscopes and to be replayed using arbitrary waveform generators. A programmatic interface enables easy integration of SerialXpress into test automation systems. Advanced Pre/De-emphasis and Noise Many standards such as PCIe require the output waveform to be pre/de-emphasized. SerialXpress allows easy addition of pre/de-emphasis, including preshoot, with all other jitter parameters. Vertical noise can also be added at both near and far end of the channel. Second, an S-parameter file generated from a Tektronix sampling oscilloscope or a vector network analyzer can be directly convolved with the base pattern to recreate the channel characteristics. By applying inverse filtering the effects of the channel can be de-embedded from the system. Also, ISI within the S-parameter can be scaled upwards or downwards, which will alter the characteristics of the channel. Delay SerialXpress allows users to introduce delay to the waveform, and this feature can also generate skew between channels or patterns. Base Pattern SerialXpress is bundled with several sample patterns for various standards like SATA, Display Port, SAS, PCIe, HDMI, USB, MIPI, and Fibre Channel. Patterns can also be directly entered in a Binary, Symbol, or Hex editor or loaded as a file. Idle State*1 Standards like SATA call for OOB signaling which requires idle state followed by a burst. Now the user can directly create this idle state without the need of using additional power dividers. Calibration SerialXpress has a built-in calibration routine which controls a Tektronix oscilloscope and calibrates the output of the AWG for periodic jitter and random jitter, reducing the need for time-consuming manual calibration. Bandwidth Expansion Filter Rise time of the AWG can be expanded further by applying the bandwidth expansion filter. [. . . ] *3 4-PAM and PWM are mutually exclusive. System Requirements The following PC configuration is required to install the offline version: Ordering Information SerialXpress® Jitter Generation Software Package for Tektronix AWG5000/7000 Series. If not accessible, call: +41 52 675 3777 Updated 25 May 2010 For Further Information. Tektronix maintains a comprehensive, constantly expanding collection of application notes, technical briefs and other resources to help engineers working on the cutting edge of technology. [. . . ]