Global Sources
EE Times-India
Stay in touch with EE Times India
EE Times-India > T&M

Pattern generators offer jitter injection

Posted: 22 Jan 2007     Print Version  Bookmark and Share

Keywords:pattern generator  jitter injection  oscilloscopes  Agilent  interface tester 

Providing options to enable accurate characterisation of high-speed interfaces, Agilent Technologies Inc. introduces its J-BERT N4903A pattern generators with jitter injection capabilities. These options are for the previously introduced generators.

Useful to 7Gbps and 12.5Gbps, these pattern generators let users accurately stimulate serial high-speed ports with all types of jitter. They can be used to perform characterisation and compliance tests. The J-BERT N4903A pattern generators can also be used in combination with oscilloscopes, built-in error detectors or other analysers.

Ideal, worst-case conditions
Users can inject clean, as well as worst-case jittered, pattern and clock signals into a DUT. Tools, such as oscilloscopes, built-in error ratios test or other analysers, can be used to monitor the behaviour of the DUT under ideal and worst-case conditions.

The J-BERT N4903A pattern generators simplify worst-case jitter tolerance testing with built-in and calibrated jitter sources for random jitter (RJ), periodic jitter (PJ) and bounded uncorrelated jitter (BUJ). The system supports eye closures of greater than 0.5 unit intervals (UI).

The options extend the usefulness of these instruments in a number of ways. Agilent's Option J20, for example, emulates inter-symbol interference (ISI). Users can use this to test for robustness against differential-mode or single-mode noise. They can also inject commonly used spread spectrum clocks.

Simplifies instrument setup
The options also simplify instrument setup for serial computer bus devices. Complex training sequences can be set up with a pattern sequencer and 32MB of pattern memory. All types of clock-rate and data-rate ratios can be generated with sub-rate clock outputs.

This system can also cover all popular data rates between 150Mbps and 7Gbps (using Option G07) or to 12.5Gbps (Option G13). Users can expect accurate results based on excellent signal performance with 20ps transition times (from 20 per cent to 80 per cent) and 9ps peak-peak jitter.

Agilent's instruments also ensure grow-as-you-go functions, which lets users add J-BERT functions over time, with error detector, clock data recovery (CDR) and jitter tolerance testing.

Agilent's J-BERT N4903A pattern generator options are expected to be available for ordering in March. The expected price for the 7Gbps option, including the jitter sources, will be Rs.55.29 lakh ($122,000). The 12.5Gbps option is expected to be priced at Rs.62.58 lakh ($138,000).

- Alex Mendelsohn

Comment on "Pattern generators offer jitter inje..."
*  You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.


Go to top             Connect on Facebook      Follow us on Twitter      Follow us on Orkut

Back to Top