1 / 9

Receiver Circuit Testing: Eye Diagrams, BER Measurement, and Signal Monitoring

This guide provides an overview of receiver circuit testing, including test setup, eye diagrams, and Bit Error Rate (BER) measurement. Key components discussed include pattern generators, attenuators, and oscilloscopes for effective signal monitoring. The importance of using a 50 Ω coaxial cable for signals above 1 Mbps, and methods to ensure signal integrity through techniques like grounding and impedance matching are emphasized. Understanding the eye-BER relationship is crucial for assessing receiver sensitivity and performance under varying data rates. PRBS sources are used for rigorous error measurements, crucial for identifying receiver performance issues.

danyl
Télécharger la présentation

Receiver Circuit Testing: Eye Diagrams, BER Measurement, and Signal Monitoring

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Receiver Circuit Testing • Test setup • Eye diagrams • BER measurement • Eye - BER relationship

  2. Circuit Test Setup • Pattern Generator • Attenuator • Oscilloscope

  3. Signal Monitoring • Terminated 50 coax for > 1 Mbps • capacitance (NRZ data, 50 ohms): • 1/2piRC > data rate

  4. RF Oscillation Prevention • Grounded coax for all inputs • Single ground point for bias

  5. RF Circuit Test • 50  transmission line to chip: • Stripline printed circuit boards • or short lines • 50  output drivers

  6. BER Measurement • PRBS source • Attenuation • Error measurement

  7. PRBS source • Pseudo random data is severe test of receiver • Length of zero or one string is critical (ISI) • Eye diagram is “open” for low ISI

  8. Attenuation • Sensitivity of receiver: • BER at fixed pin and data rate • Noise floor due to dynamic range limits • Need to vary pin

  9. Error Measurement • Correlate PRBS and output data • BER = number of errors / data bits sent • BER = 10-9or 10-11 typical • i.e., 1 error per Gbit of data = 10-9

More Related