Document:

Form of Note

 Exhibit 4.2 
 FORM OF NOTE DUE ______ 
 UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY
TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED
BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS A BENEFICIAL INTEREST HEREIN. 
 TRANSFERS OF THIS NOTE
ARE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL NOTE ARE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE TRANSFER PROVISIONS
OF THE INDENTURE. 
 IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER
INFORMATION AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS. 

 ROPER INDUSTRIES, INC. 
 ______ Notes due ______, ______ 
  

			
	 No.
	  	CUSIP No.:            
		  	ISIN No.:            

 $             
 ROPER INDUSTRIES, INC., a Delaware corporation (the “Issuer”), for value received promises to pay to CEDE & CO. or registered
assigns the principal sum of _____________ [UNITED STATES DOLLARS][OTHER CURRENCY] on ______, ______. 
 Interest Payment Dates: [_______][,
______, ______] and ______ (each, an “Interest Payment Date”), commencing on ______, ______. 
 Interest Record Dates: the
Business Day preceding each Interest Payment Date (each, an “Interest Record Date”). 
 Reference is made to the further
provisions of this Note contained herein, which will for all purposes have the same effect as if set forth at this place. 

 IN WITNESS WHEREOF, the Issuer has caused this Note to be signed manually or by facsimile by its duly
authorized officers. 
  

			
	ROPER INDUSTRIES, INC.
		
	BY:	 	  
		 	Name:
		 	Title:

 This is one of the Notes of the series designated herein and referred to in the within-mentioned
Indenture. 
 Dated: ______, ______ 
  

			
	 Wells Fargo Bank, National Association, as Trustee

		
	By	 	 
		 	Authorized Signatory

 (REVERSE OF NOTE) 
 ROPER INDUSTRIES, INC. 
 ______ Notes due ______, ______ 
  

	 	1.	Interest. 

 Roper Industries, Inc. (the
“Issuer”) promises to pay interest on the principal amount of this Note at the rate per annum described above. Cash interest on the Notes will accrue from the most recent date to which interest has been paid; or, if no interest has
been paid, from ________, ________. Interest on this Note will be paid to but excluding the relevant Interest Payment Date or on such earlier date as the principal amount shall become due in accordance with the provisions hereof. The Issuer
will pay interest [quarterly][semi-annually][annually] in arrears on each Interest Payment Date, commencing ______, ______. Interest will be computed on the basis of [day count convention]. 
 The Issuer shall pay interest on overdue principal from time to time on demand at the rate borne by the Notes and on overdue installments of interest
(without regard to any applicable grace periods) to the extent lawful. 
 [Insert floating interest rate provisions, if applicable.]

  

	 	2.	Paying Agent. 

 Initially, Wells Fargo Bank, National
Association (the “Trustee”) will act as paying agent. The Issuer may change any paying agent without notice to the Holders. 
  

	 	3.	Indenture; Defined Terms. 

 This Note is one of the ______
Notes due ______, ______ (the “Notes”) issued under an indenture dated as of ________, 2008 (the “Base Indenture”) by and between the Issuer and the Trustee, and established pursuant to an [officers’
certificate] [supplemental indenture] dated _____, _____, issued pursuant to Section 2.01 and Section 2.03 thereof (together, the “Indenture”). This Note is a “Security” and the Notes are “Securities”
under the Indenture. 
 For purposes of this Note, unless otherwise defined herein, capitalized terms herein are used as defined in the
Indenture. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939 (15 U.S.C. Sections 77aaa-77bbbb) (the “TIA”) as in effect on the date on
which the Indenture was qualified under the TIA. Notwithstanding anything to the contrary herein, the Notes are subject to all such terms, and holders of Notes are referred to the Indenture and the TIA for a 

 
statement of them. To the extent the terms of the Indenture and this Note are inconsistent, the terms of the Indenture shall govern. 
  

	 	4.	Denominations; Transfer; Exchange. 

 The Notes are in
registered form, without coupons, in denominations of $2,000 and multiples of $1,000 thereafter. A Holder shall register the transfer or exchange of Notes in accordance with the Indenture. The Issuer may require a Holder, among other things, to
furnish appropriate endorsements and transfer documents and to pay certain transfer taxes or similar governmental charges payable in connection therewith as permitted by the Indenture. The Issuer need not issue, authenticate, register the transfer
of or exchange any Notes or portions thereof for a period of fifteen (15) days before the mailing of a notice of redemption, nor need the Issuer register the transfer or exchange of any Note selected for redemption in whole or in part.

  

	 	5.	Amendment; Supplement; Waiver. 

 Subject to certain
exceptions, the Notes and the provisions of the Indenture relating to the Notes may be amended or supplemented and any existing default or Event of Default or compliance with certain provisions may be waived with the written consent of the Holders
of at least a majority in aggregate principal amount of all series of Outstanding Securities (including the Notes) under the Indenture that are affected by such amendment, supplement or waiver (voting together as a single class). Without notice to
or consent of any Holder, the parties thereto may amend or supplement the Indenture and the Notes to, among other things, cure any ambiguity, defect or inconsistency or comply with any requirements of the Commission in connection with the
qualification of the Indenture under the TIA, or make any other change that does not adversely affect the rights of any Holder of a Note. 
  

	 	6.	Defaults and Remedies. 

 If an Event of Default (other than
certain bankruptcy Events of Default with respect to the Issuer) under the Indenture occurs with respect to the Notes and is continuing, then the Trustee may and, at the direction of the Holders of at least 25% in principal amount of all series of
Outstanding Securities (including the Notes) under the Indenture that are affected by such Event of Default (voting together as a single class), shall by written notice, require the Issuer to repay immediately the entire principal amount of the
Outstanding Notes, together with all accrued and unpaid interest and premium, if any. If a bankruptcy Event of Default with respect to the Issuer occurs and is continuing, then the entire principal amount of the Outstanding Notes will automatically
become due immediately and payable without any declaration or other act on the part of the Trustee or any Holder. Holders of Notes may not enforce the Indenture or the Notes except as provided in the Indenture. The Trustee is not obligated to
enforce 

 
the Indenture or the Notes unless it has received indemnity as it reasonably requires. The Indenture permits, subject to certain limitations therein
provided, Holders of a majority in aggregate principal amount of Outstanding Securities (including the Notes) affected (voting together as a single class) to direct the Trustee in its exercise of any trust or power. The Trustee may withhold from
Holders of Notes notice of certain continuing defaults or Events of Default if it determines that withholding notice is in their interest. 
  

	 	7.	Authentication. 

 This Note shall not be valid until the
Trustee manually signs the certificate of authentication on this Note. 
  

	 	8.	Abbreviations and Defined Terms. 

 Customary abbreviations
may be used in the name of a Holder of a Note or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian),
and U/G/M/A (= Uniform Gifts to Minors Act). 
  

	 	9.	CUSIP Numbers. 

 Pursuant to a recommendation promulgated
by the Committee on Uniform Security Identification Procedures, the Issuer has caused CUSIP numbers to be printed on the Notes as a convenience to the Holders of the Notes. No representation is made as to the accuracy of such numbers as printed on
the Notes and reliance may be placed only on the other identification numbers printed hereon. 
  

	 	10.	Governing Law. 

 The laws of the State of New York shall
govern the Indenture and this Note thereof. 
  

  
 ASSIGNMENT FORM 
 To assign this Note, fill in the form below: 
 I or we assign and transfer this Note to 
  

	 	    	(Print or type assignee’s name, address and zip code) 

  

	 	    	(Insert assignee’s soc. sec. or tax I.D. No.) 

 and irrevocably
appoint                      agent to transfer this Note on the books of the Issuer. The agent may substitute another to act for him. 
  
  
 Date: ________________ Your Signature: _____________________ 
  
  
 Sign exactly as your name appears on the other side of this Note.

  

					
			
	 	 		 	  
		 		 	Signature
	 Signature Guarantee:
	 		 	
			
	  	 		 	  
	 Signature must be guaranteed
	 		 	Signature

 Signatures must be guaranteed by an “eligible guarantor institution” meeting the
requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the
Registrar in addition to, or in substitution for, STAMP, all in accordance with the United States Securities Exchange Act of 1934, as amended. 
  
  

 SCHEDULE OF EXCHANGES OF NOTES 
 The following exchanges of a part of this Global Note for Physical Notes or a part of another Global Note have been made: 
  

									
	 Date of Exchange
	 	 Amount of decrease
 in principal amount
 of this Global
Note
	 	 Amount of increase
 in principal amount
 of this Global
Note
	  	Principal amount of
this Global Note
following such
decrease (or
increase)	  	Signature of
authorized officer of
TrusteeRetention Agreement - Mark J. Gallenberger

 Exhibit 10.1 
 [LTX Corporation Letterhead] 
 July 29, 2008 
 Mark J. Gallenberger 
  

	 	Re:	Retention Agreement 

 Dear Mark: 
 In recognition of your continued employment with LTX Corporation (“LTX” or the “Company”) following the closing (the “Closing”) of the
merger contemplated by that certain Agreement and Plan of Merger, dated as of June 20, 2008, by and among LTX, Zoo Merger Corporation, and Credence Systems Corporation, and as an incentive for you to remain employed with the Company, LTX agrees
to the following terms of your employment, effective and contingent upon the Closing and your countersigning of this letter agreement (the “Retention Agreement”). 
 1. You shall continue to be employed by the Company to serve on a full-time basis as Chief Financial Officer. As Chief Financial Officer, you will be
responsible for the performance of those duties and responsibilities commensurate with holding that position and such other duties assigned to you by LTX from time-to-time. You will report to the Chief Executive Officer of the Company. 

2. Your base salary will be at the rate of $30,000 per monthly pay period (which if annualized equals $360,000), to be paid in installments in
accordance with the Company’s standard payroll practices. Such base salary may be adjusted from time to time in accordance with normal business practices and in the sole discretion of the Company. 
 3. Following the end of each fiscal year and subject to the approval of the Company’s Board of Directors or the Compensation Committee of the Board
of Directors, you will be eligible for a retention and performance cash bonus under the Company’s annual cash incentive plan applicable to executives, as such plan is in effect and amended from time to time, with a target bonus of 50% of your
annualized base salary (the “Target Bonus”). In any event, you must be an active employee of the Company on the date the bonus is distributed in order to be eligible for and to earn any bonus award, as it also serves as an incentive to
remain employed by the Company. Any bonus earned will be paid in accordance with the Company’s customary timing for such payments and, in any event, no later than end of the calendar year in which the bonus is determined. 
 4. You may participate in all benefit programs that the Company establishes and makes available to its employees, provided that you are eligible under
(and subject to all provisions of) the plan documents governing those programs. Benefits are subject to change at any time in the Company’s sole discretion. 
 5. You shall be eligible for paid vacation in accordance with the Company’s vacation policy. 

 6. As approved by the Compensation Committee of the Company’s Board of Directors on July 23,
2008, you will receive a one-time grant of 125,000 restricted stock units (“RSUs”) under the Company’s 2004 Stock Plan (the “Stock Plan”) on or shortly after the Closing. This grant will vest in equal annual installments
over a three-year period, beginning with the first anniversary of the date of grant and assuming you remain employed by the Company or as otherwise provided below, and will be governed in all respects by the terms of the Stock Plan and our customary
form of agreement. 
 7. You will receive under the Stock Plan an additional grant of 165,000 RSUs at the time of and in connection with the
Company’s routine fiscal 2008 annual equity grants to executive officers (which are currently expected to be made in September 2008). This grant will vest in equal annual installments over a four-year period, beginning with the first
anniversary of the date of grant and assuming you remain employed by the Company or as otherwise provided below, and will be governed in all respects by the terms of the Stock Plan and our customary form of agreement. 
 8. If your employment is terminated by the Company without “Cause,” as defined below, or
you resign your employment with the Company for “Good Reason,” as defined below, you shall be entitled to receive the following severance benefits, provided you execute and do not revoke a severance and release agreement provided by the
Company: (a) for a period of 12 months following your termination date, the Company shall continue to pay to you, in accordance with its regularly established payroll procedure, your then-current base salary, even though you will no longer
be employed; (b) the Company will pay to you, following your termination date, an amount equal to your Target Bonus for the fiscal year in which your employment terminated; (c) provided you are eligible for and elect to continue receiving
group medical insurance pursuant to the federal “COBRA” law, 29 U.S.C. § 1161 et. seq., and provided you continue to pay the share of the premium for such coverage that you paid as of your termination date, for a period of
12 months following your termination date (unless you cease being eligible such as through becoming covered by another employer), the Company will pay the remainder of the insurance premium for your coverage (and you will be able to continue
coverage for a longer period, if eligible, at your own full expense); and (d) all RSUs described in this Retention Agreement or otherwise granted to you prior to the Closing shall accelerate and become vested under the applicable agreements, to
the extent such grants of equity compensation are outstanding and unvested at the time of your termination of employment. Payments and benefits under clauses (a), (b), and (d) will occur or begin, as applicable, on the payroll date coinciding
with or next following the 60th day after your date of termination (or such later date required by Section 14 below) provided that you have
previously signed and not revoked the release agreement noted above by such 60th day. 
 i. As used herein, “Cause” shall mean a finding by the Company that you: 
 (a) failed to perform your assigned duties diligently or effectively or were negligent in the performance of such duties; 
 (b) breached this Retention Agreement or any other agreement or material company policy applicable to you; 
 (c) engaged in misconduct, fraud, or embezzlement; 
 (d) engaged in any conduct that is harmful to the business, interests or reputation of the Company; or 
  

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 (e) were convicted of, or pleaded guilty or nolo contendere to, any misdemeanor related
to your employment or to a felony. 
 ii. As used herein, “Good Reason” shall mean the Company’s requirement that you relocate
to or be based in California as a condition of your continued employment. To terminate your employment for “Good Reason,” you must (a) provide notice to the Company within 90 days following the occurrence of the event that you
consider provides you with grounds for such termination, (b) provide the Company with at least 30 days to cure the event, and, (c) if not then cured, actually terminate your employment for such reason within 30 days thereafter. 

9. You represent and warrant that you are not bound by any employment contracts, restrictive covenants or other restrictions that prevent you from
continuing your employment with, or carrying out you responsibilities for, the Company, or that are in any way inconsistent with any of the terms of this Retention Agreement. 
 10. This Retention Agreement shall not be construed as an agreement, either express or implied, to employ you for any stated term, and shall in no way
alter the Company’s policy of employment at-will, under which both the Company and you remain free to end the employment relationship for any reason, at any time, with or without notice, on the terms and subject to the conditions set forth in
this Retention Agreement. This Retention Agreement supersedes all prior understandings, whether written or oral, relating to the terms of your employment with the Company, other than the October 3, 2000 Change-Of-Control Employment Agreement
(the “2000 Agreement”), as modified by the June 20, 2008 Waiver Letter, which remains in full force and effect; provided, however, that if a future Change of Control (as defined in the 2000 Agreement) occurs, any compensation or
benefits due you under the 2000 Agreement will be offset by any comparable benefits due you under Section 8 of this Retention Agreement. 
 11. Any amendment to this Retention Agreement shall be made in writing and signed by the parties hereto. This Retention Agreement shall be governed by the laws of the Commonwealth of Massachusetts. You and the Company each hereby
irrevocably waive any right to a trial by jury in any action, suit or other legal proceeding arising under or relating to any provision of this Retention Agreement. 
 12. You state and represent that you have had an opportunity to fully discuss and review the terms of this Retention Agreement with an attorney and are not relying on any representation, promise, or inducement made by
the Company that is not set forth herein. You further state and represent that you have carefully read this Retention Agreement, understand the contents herein, freely and voluntarily assent to all of the terms and conditions hereof, and sign your
name of your own free act. 
 13. In case any provision of this Retention Agreement shall be invalid, illegal or otherwise unenforceable, the
validity, legality and enforceability of the remaining provisions shall in no way be affected or impaired thereby. 
 14. All payments
hereunder are subject to applicable tax and other required withholdings. You acknowledge that this Retention Agreement is intended to comply, to the extent applicable, with the provisions of Section 409A of the Internal Revenue Code of 1986
(“Section 409A”) and shall, to the extent practicable, be construed in accordance therewith. Terms defined in this Retention Agreement shall have the meanings given such terms under Section 409A if and to the extent required in order
to comply with Section 409A. If and to the 

  

 3 

 
extent any portion of any payment, compensation or other benefit provided to you in connection with your separation from service (as defined in
Section 409A) is determined to constitute “nonqualified deferred compensation” within the meaning of Section 409A and you are a “specified employee” as defined in Section 409A(a)(2)(B)(i), as determined by the
Company in accordance with its procedures and Treasury Regulation 1.409A-1(i), by which determination you hereby agree that you are bound, such portion of the payment, compensation or other benefit shall not be paid before the day that is six months
plus one day after the date of separation from service (as determined under Section 409A (the “New Payment Date”)), except as Section 409A may then permit. The aggregate of any payments that otherwise would have been paid to you
during the period between the date of separation from service and the New Payment Date shall be paid to you in a lump sum on such New Payment Date, and any remaining payments will be paid on their original schedule. For purposes of this Retention
Agreement, each amount to be paid or benefit to be provided shall be construed as a separate identified payment for purposes of Section 409A, and any payments that are due within the “short term deferral period” as defined in
Section 409A shall not be treated as deferred compensation unless applicable law requires otherwise. Neither the Company nor you shall have the right to accelerate or defer the delivery of any such payments or benefits except to the extent
specifically permitted or required by Section 409A. Notwithstanding the foregoing, to the extent that this Retention Agreement or any payment or benefit hereunder shall be deemed not to comply with Section 409A, then neither the Company,
its Boards of Directors, nor any of its designees, agents, or employees shall be liable to you or any other person for any actions, decisions or determinations made in good faith under this Retention Agreement, or for any resulting adverse tax
consequences. 
  

			
	 LTX CORPORATION
  

		
	By:	 	/s/ David G. Tacelli
		 	 Name: David G. Tacelli
 Title: President & CEO

  

	
	 AGREED TO AND ACCEPTED
  

	
	/s/ Mark J. Gallenberger
	Mark J. Gallenberger

  

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