Press Release

Harmonic Announces Webcast Presentations at Investor Events in September 2008

September 2, 2008

SUNNYVALE, Calif.--(BUSINESS WIRE)--Sept. 2, 2008--Harmonic Inc. (Nasdaq:HLIT) today announced that it will make presentations in September at the following investor conferences:

-- Kaufman Brothers 11th Annual Investor Conference -
   Robin Dickson, Chief Financial Officer; September 4 at 1:30 P.M.
    (Eastern Time);

-- Deutsche Bank 2008 Technology Conference -
   Robin Dickson, Chief Financial Officer; September 9 at 2:30 p.m.
    (Pacific Time);

-- Jefferies 2nd Annual Technology Conference -
   Patrick Harshman, President & CEO; September 10 at 8:30 A.M.
    (Eastern Time); and

-- C.L. King's Best Ideas Conference -
   Robin Dickson, Chief Financial Officer; September 17 at 8:30 A.M.
    (Eastern Time)

The live webcasts of Harmonic's presentations will be available from Harmonic's website, www.harmonicinc.com, under the Investor Relations Events section. The replays will be available after 5:00 P.M. (Pacific Time) on the date of the presentation at the same Web address.

About Harmonic Inc.

Harmonic Inc. is a leading provider of versatile and high performance video solutions that enable service providers to efficiently deliver the next generation of broadcast and on-demand services including high definition, video-on-demand, network personal video recording and time-shifted TV. Cable, satellite, broadcast and telecom service providers can utilize Harmonic's digital video, broadband optical access and software solutions to offer consumers a compelling and personalized viewing experience.

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.


    CONTACT: Harmonic Inc.
             Chief Financial Officer
             Robin N. Dickson, 408-542-2500
             or
             StreetConnect
             Investor Relations
             Michael Newman, 408-542-2760

    SOURCE: Harmonic Inc.