Harmonic Inc. Announces First Quarter Reporting Date

SUNNYVALE, Calif. - April 6, 2004 - Harmonic Inc. (Nasdaq: HLIT) today announced that it plans to report its first quarter 2004 results after market close on April 22, 2004.

Harmonic will also host a conference call to discuss its financial results at 2:00 P.M. Pacific (5:00 P.M. Eastern) on April 22, 2004. A listen-only broadcast of the conference call can be accessed on the Company’s website at www.harmonicinc.com or by calling +1–415–908–4707 (Reservation No. 21180558). The replay will be available after 5:00 P.M. on April 22, 2004 at the same website address or by calling +1–402–977–9140 (Reservation No. 21180558).

About Harmonic Inc.
Harmonic Inc. is a leading provider of digital video, broadband optical networking and IP delivery systems to cable, satellite, telecom and broadcast network operators. Harmonic's open standards-based solutions for the headend through the last mile enable customers to develop new revenue sources and a competitive advantage by offering powerful interactive video, voice and data services such as video-on-demand, high definition digital television, telephony and Internet access.

Harmonic (Nasdaq: HLIT) is headquartered in Sunnyvale, California with R&D, sales and system integration centers worldwide. The Company's customers, including many of the world's largest communications providers, deliver services in virtually every country. Visit www.harmonicinc.com for more information.