Agilent N5461A Serial Data Equalization for Infiniium 90000 Series 5990-3330EN c20141008 [9] free download

File name N5461A Serial Data Equalization for Infiniium 90000 Series 5990-3330EN c20141008 [9].pdf

Keysight Technologies Serial Data Equalization Software for Infiniium Series Oscilloscopes Data Sheet 02 | Keysight | Serial Data Equalization Software for Infiniium Series Oscilloscopes - Data Sheet Significantly reduce receiver errors by opening even tightly shut eyes through equalization emulation Keysight Technologies, Inc. serial data equalization software for Infiniium Series oscilloscopes provides fast and accurate equalization simulating decision feedback equalization (DFE), feed-forward equalization (FFE), and continuous time linear equalization (CTLE) modeling in real time. Serial data equalization software allows users to input their own self-designated tap values or will find the optimal tap values for the designer for FFE and DFE. CTLE allows DC gain and up to three pole modeling. Used in conjunction with the Infiniium Series unique Infiniium data accelerator (IDA) chip, serial data equalization software provides fast update rates and rapid analysis of real-time eyes that have been partially or fully closed by the serial data link. The serial data equalization software package includes a wizard that provides an easy-to-follow step-by-step process to set up and emulate full equalization. Figure 1: Complete link 03 | Keysight | Serial Data Equalization Software for Infiniium Series Oscilloscopes - Data Sheet Equalization FAQ 1. Why do I need equalization? As data rates go up, the signal deteriorates from the transmitter to the receiver due to ISI, noise, etc. The more loss that occurs, the more difficult it is for a receiver comparator to distinguish a "1" from a "0". A high data rate coupled with a lossy channel will cause an open eye at a transmitter to be closed at the receiver. Receivers need to be able to evaluate 1's and 0's; As eyes get more and more closed, the receiver has a more difficult time interpreting the correct value as a 1 or a 0. This difficulty ultimately leads to significant data corruption and errors. Equalization uses advanced filtering techniques to correct the voltage level of the current bit. By removing much of the intersymbol interference through filtering, equalization can improve closed eyes into open eyes and significantly reduce the data corruption. The equalization software provides insight into designers' equalizer designs and key data into the viability of the channel link after equalization. 2. What is the difference between decision feedback equalization (DFE) and feed-forward equalization (FFE)? FFE typically looks only at the bits preceding the current bit to open the eye while DFE dynamically will change based on the current bit in addition to any previous bits. FFE uses the same filter for each receiver and every bit. DFE is adaptive and can vary by device. DFE can be used in addition to FFE; however FFE cannot be us