Agilent Technologies has announced the availability of phase-noise measurement software and options for the digital communications analyzer (DCA-J). The software supports phase noise and jitter measurements of clock and data signals over a wide dynamic range of 50 Mb/s to 13.5 Gb/s. A new electro-optical module provides optical transmitter tests and 40-Gb/s optical compliance testing, and an advanced amplitude analysis option offers new methods for evaluating optical amplitude modulation and relative intensity noise. For more information on the DCA-J and its new options and software, visit the Agilent site at: