120 VIAVI Solutions OC48 Data Sequence Generator

The Model 120A Data Sequence Generator is a very high speed, low jitter pseudorandom data source, designed for general laboratory use. The bench top or rack mounted instrument is AC line powered for any line source from 80 to 240 VAC.

The 120A generates clock and data at SONET/SDH data rates 2488, 1244, 622, and 155 Mb/s using the 120A's internal reference synthesizer.

The unit can also generate clock and data at user defined rates via an external reference port. The user may provide this reference by using a low cost, frequency synthesizer, taking advantage of the 120A's built-in clock multiplier. In this mode, the clock multiplier provides 1X, 4X, 8X, or 16X multiples of the external reference input frequency. The user may also provide a Data Gen Clock input directly at the bit rate, if desired.

The Trigger output (Clock÷16) is useful for digital sampling oscilloscopes, most of which cannot trigger at rates beyond a few hundred MHz.

The 120A meets SONET/SDH jitter generation standards from 155.52 Mb/s to 2.488 Gb/s (Reference Bellcore GR-253 and ITU G.957 specifications), making it ideal for production system compliance and proof-of-performance testing.

The unit will also find application in test equipment demonstration and evaluation with high speed digital sampling oscilloscopes, communication analyzers, optical sources, and production system testing. The 120A is compact, light-weight, and self contained, making it ideal for field, laboratory and production test and measurement applications.