<SUBMISSION>
<ACCESSION-NUMBER>0001209191-09-012007
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20090224
<FILING-DATE>20090226
<DATE-OF-FILING-DATE-CHANGE>20090226
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>HARMONIC INC
<CIK>0000851310
<ASSIGNED-SIC>3663
<IRS-NUMBER>770201147
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>549 BALTIC WAY
<CITY>SUNNYVALE
<STATE>CA
<ZIP>94089
<PHONE>4085422500
</BUSINESS-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>HARMONIC LIGHTWAVES INC
<DATE-CHANGED>19950404
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Ben-Natan Nimrod
<CIK>0001399157
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-25826
<FILM-NUMBER>09639545
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>408-542-2660
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>549 BALTIC WAY
<CITY>SUNNYVALE
<STATE>CA
<ZIP>94089
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c81803_4x1.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-02-24</periodOfReport>

    <issuer>
        <issuerCik>0000851310</issuerCik>
        <issuerName>HARMONIC INC</issuerName>
        <issuerTradingSymbol>HLIT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001399157</rptOwnerCik>
            <rptOwnerName>Ben-Natan Nimrod</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>549 BALTIC WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SUNNYVALE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94089</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, Solutions &amp; Strategy</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2009-02-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>35000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35000</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Right to buy</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.63</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2009-02-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>65000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2010-02-15</value>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-02-24</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>65000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>65000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each restricted stock unit represents a contingent right to receive one share of HLIT common stock.</footnote>
        <footnote id="F2">Twenty five percent of the restricted stock units vest on 02/15/2010 and twelve point five percent vest on 08/15/2010, 02/15/2011, 08/15/2011, 02/15/2012, 08/15/2012 and 02/15/2013.</footnote>
        <footnote id="F3">Twenty five percent of the Shares subject to the Option vest twelve months after the Vesting Commencement Date 02/15/2009, and 1/48 of the Shares subject to the Option vest each month thereafter</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Elisa Martinez By Attorney-in-Fact: Elisa Martinez</signatureName>
        <signatureDate>2009-02-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>c81803_24.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
<html>
<head><title>Filed by Bowne Pure Compliance</title></head>
<body><DIV
style="margin-left: 0.25in; width: 7.2in; font-family: 'Times New Roman',Times,serif">

<P style="font-size: 10pt" align="center"><B>POWER OF ATTORNEY</B>

<P style="font-size: 10pt; text-indent: 1%"
align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Know all by these presents, that the
undersigned hereby constitutes and appoints each of Robin N. Dickson and Laura
A. Donovan , and Elisa Martinez, signing singly, the undersigned&#8217;s true
and lawful attorney-in-fact to:
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" cellpadding="0" width="90%"
border="0">
<!-- Begin Table Head -->

 <TR valign="bottom">
  <TD width="8%">&nbsp;</TD>
  <TD width="5%">&nbsp;</TD>
  <TD width="87%">&nbsp;</TD>
 </TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
 <TR valign="bottom">
  <TD valign="top">
<DIV style="margin-left: 0px; text-indent: 0px">(1) </DIV>
</TD>
  <TD>&nbsp;</TD>
  <TD valign="top" align="left">execute for and on behalf of the undersigned,
in the undersigned&#8217;s capacity as an officer and/or director of Harmonic
Inc. (the &#8220;Company&#8221;), Forms 3, 4, and 5 in accordance with
Section&nbsp;16(a) of the Securities Exchange Act of 1934 and the rules
thereunder;<P></TD>
 </TR>
 <TR valign="bottom">
  <TD valign="top">
<DIV style="margin-left: 0px; text-indent: 0px">(2) </DIV>
</TD>
  <TD>&nbsp;</TD>
  <TD valign="top" align="left">do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to complete and
execute any such Form&nbsp;3, 4, or 5, complete and execute any amendment or
amendments thereto, and timely file such form with the United States Securities
and Exchange Commission and any stock exchange or similar authority; and<P></TD>
 </TR>
 <TR valign="bottom">
  <TD valign="top">
<DIV style="margin-left: 0px; text-indent: 0px">(3) </DIV>
</TD>
  <TD>&nbsp;</TD>
  <TD valign="top" align="left">take any other action of any type whatsoever in
connection with the foregoing which, in the opinion of such attorney-in-fact,
may be of benefit to, in the best interest of, or legally required by, the
undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power of
Attorney shall be in such form and shall contain such terms and conditions as
such attorney-in-fact may approve in such attorney-in-fact&#8217;s
discretion.</TD>
 </TR>
<!-- End Table Body -->

</TABLE>
</DIV>

<P style="font-size: 10pt; text-indent: 1%"
align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The undersigned hereby grants to
each such attorney-in-fact full power and authority to do and perform any and
every act and thing whatsoever requisite, necessary, or proper to be done in
the exercise of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do if personally
present, with full power of substitution or revocation, hereby ratifying and
confirming all that such attorney-in-fact, or such attorney-in-fact&#8217;s
substitute or substitutes, shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers herein granted. The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving in
such capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned&#8217;s responsibilities to comply
with Section&nbsp;16 of the Securities Exchange Act of 1934.

<P style="font-size: 10pt; text-indent: 1%"
align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Power of Attorney shall remain
in full force and effect until the undersigned is no longer required to file
Forms 3, 4, and 5 with respect to the undersigned&#8217;s holdings of and
transactions in securities issued by the Company, unless earlier revoked by the
undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

<P style="font-size: 10pt; text-indent: 1%"
align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN WITNESS WHEREOF, the undersigned
has caused this Power of Attorney to be executed as of this 26th day of
February, 2003.

<P style="font-size: 10pt; margin-left: 45%; text-indent: 1%"
align="left"><U>&nbsp;&nbsp;/s/ Nimrod
Ben-Natan&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U>

<DIV style="font-size: 10pt; margin-left: 45%; text-indent: 1%"
align="left">Signature</DIV>

<P style="font-size: 10pt; margin-left: 45%; text-indent: 1%"
align="left"><U>&nbsp;&nbsp;Nimrod
Ben-Natan&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U>

<DIV style="font-size: 10pt; margin-left: 45%; text-indent: 1%"
align="left">Print Name </DIV>

<P style="font-size: 10pt" align="center">&nbsp;

<P style="display: none; font-size: 10pt" align="center">&nbsp;
</DIV>

</body>
</html>
</TEXT>
</DOCUMENT>
</SUBMISSION>
