34401A Service Guide
Notices
© Agilent Technologies, Inc. 1991 - 2012
No part of this manual may be reproduced in any 
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copyright laws.
Manual Part Number
34401-90013
Edition
Eighth Edition. May 2012
Printed in Malaysia
Agilent Technologies, Inc.
3501 Stevens Creek Blvd. Santa 
Clara, CA 95052 USA
Microsoft® and Windows® are U.S. registered 
trademarks of Microsoft Corporation.
Software Revision
This guide is valid for the firmware that was 
installed in the instrument at the time of 
manufacture. However, upgrading the firmware 
may add or change product features. 
Warranty
The material contained in this 
document is provided “as is,” and is 
subject to being changed, without 
notice, in future editions. Further, to 
the maximum extent permitted by 
applicable law, Agilent disclaims all 
warranties, either express or implied, 
with regard to this manual and any 
information contained herein, including 
but not limited to the implied 
warranties of merchantability and 
fitness for a particular purpose. Agilent 
shall not be liable for errors or for 
incidental or consequential damages in 
connection with the furnishing, use, or 
performance of this document or of 
any information contained herein. 
Should Agilent and the user have a 
separate written agreement with 
warranty terms covering the material in 
this document that conflict with these 
terms, the warranty terms in the 
separate agreement shall control.
Technology Licenses 
The hardware and/or software described in this 
document are furnished under a license and 
may be used or copied only in accordance with 
the terms of such license.
Restricted Rights Legend
U.S. Government Restricted Rights. Software 
and technical data rights granted to the federal 
government include only those rights 
customarily provided to end user customers.  
Agilent provides this customary commercial 
license in Software and technical data pursuant 
to FAR 12.211 (Technical Data) and 12.212 
(Computer Software) and, for the Department 
of Defense, DFARS 252.227-7015 (Technical 
Data - Commercial Items) and DFARS 
227.7202-3 (Rights in Commercial Computer 
Software or Computer Software 
Documentation).
Safety Notices
CAUTION
A CAUTION notice denotes a hazard. 
It calls attention to an operating 
procedure, practice, or the like that, if 
not correctly performed or adhered to, 
could result in damage to the product 
or loss of important data. Do not 
proceed beyond a CAUTION notice 
until the indicated conditions are fully 
understood and met. 
WARNING
A WARNING notice denotes a 
hazard. It calls attention to an 
operating procedure, practice, or 
the like that, if not correctly 
performed or adhered to, could 
result in personal injury or death. 
Do not proceed beyond a 
WARNING notice until the 
indicated conditions are fully 
understood and met.