Krohn-Hite 38 User manual

Model 38
Plug-In Filter Card
0.03Hz to 1MHz Low-Pass
0.03Hz to 300kHz High-Pass
Operating Manual

Service and Warranty
Krohn-Hite Instruments are designed and manufactured in accordance with sound engineering
practices and should give long trouble-free service under normal operating conditions. If your in-
strument fails to provide satisfactory service and you are unable to locate the source of trouble, con-
tact our Service Department at [phone], giving all the information available concerning the
failure.
DO NOT return the instrument without our written or verbal authorization to do so. After contacting
us, we will issue a Return Authorization Number which should be referenced on the packing slip and
purchase order. In most cases, we will be able to supply you with the information necessary to repair
the instrument, avoiding any transportation problems and costs. When it becomes necessary to re-
turn the instrument to the factory, kindly pack it carefully and ship it to us prepaid.
All Krohn-Hite products are warranted against defective materials and workmanship. This war-
ranty applies for a period of one year from the date of delivery to the Original Purchaser. Any instru-
ment that is found within the one year warranty period not to meet these standards, will be repaired
or replaced. This warranty does not apply to electron tubes, fuses or batteries. No other warranty is
expressed or implied.
Krohn-Hite Corporation reserves the right to make design changes at any time without incurring
any obligation to incorporate these changes in instruments previously purchased.
Modifications to this instrument must not be made without the written consent of an authorized em-
ployee of Krohn-Hite Corporation.

MODEL 38
Plug-In Filter Card
0.03Hz to 1MHz Low-Pass
0.03Hz to 300kHz High-Pass
Serial No. __________
Operating Manual
Copyright©. 2005 Krohn-Hite Corporation. All rights reserved.
Contents of this publication may not be reproduced in any form
without the written permission of Krohn-Hite Corporation.
Printed in U.S.A. - 042505.
15 Jonathan Drive, Unit 4, Brockton, MA 02301-5566 U.S.A.
Tel: [phone]; Fax: [phone]
[email protected]; www.krohn-hite.com

TABLE OF CONTENTS
SECTION 1 - GENERAL DESCRIPTION
1.1 INTRODUCTION ················································1-1
1.2 FUNCTION ···················································1-1
1.3 FILTER MODE ·················································1-1
1.4 AMPLIFIER MODE ···············································1-1
1.5 GENERAL ····················································1-2
1.6 OPTIONS·····················································1-2
SECTION 2 - OPERATION
2.1 INTRODUCTION ················································2-1
2.2 OPERATING PROCEDURE ··········································2-1
2.2.1 Channel Selection ············································2-1
2.2.2 All Channel Key Procedure ·······································2-1
2.2.3 Cutoff Frequency ············································2-1
2.2.4 Input Gain (Pre-Filter) ·········································2-1
2.2.5 Output Gain (Post-Filter) ········································2-1
2.2.6 Mode of Operation ···········································2-1
2.2.7 Filter Type ···············································2-1
2.2.8 Clear Entry Operation ··········································2-2
2.2.9 Storing Set-Ups ·············································2-2
2.2.10 Recalling Set-Ups ············································2-2
2.2.11 Second Function Keys Operation ······························2-2
2.2.12 Input Connectors ······································2-2
2.2.13 DC Level Adjust (rear panel) ································2-3
2.3 FILTER OPERATION ··············································2-3
2.3.1 Introduction ···············································2-3
2.3.2 Variable Band-Pass ···········································2-3
2.3.3 Amplitude Response ··········································2-3
2.3.4 Phase Response ·············································2-3
2.3.5 Group Delay···············································2-4
2.3.6 Transient Response ···········································2-4
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Model 38 Table of Contents