34A Manual.pdf

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Model 34A
3Hz to 2MHz
2-Channel Butterworth/Bessel
HP, LP, BP, BR
Plug-In Filter Card
for Model 3905/3916 Chassis
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 instrument fails to
provide satisfactory service and you are unable to locate the source of trouble, contact our Service
Department at (508) 580-1660, 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 return 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 warranty
applies for a period of one year from the date of delivery to the Original Purchaser. Any instrument 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 employee of
Krohn-Hite Corporation.
Model 34A Plug-In Filter Card
MODEL 34A
DUAL CHANNEL/BUTTERWORTH/BESSEL
LOW-PASS/HIGH-PASS/BAND-PASS/BAND-REJECT
PLUG-IN FILTER MODULE
OPERATING MANUAL
Serial No.
Serial No.
15 Jonahtan Drive, Brockton, MA 02301
Tel: (508) 580-1660; Fax: (508) 583-8989
E-mail: Info@krohnhite.com; www.krohn-hite.com
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Model 34A Plug-In Filter Card
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Model 34A Plug-In Filter Card
TABLE OF CONTENTS
1.0 GENERAL DESCRIPTION..................................................................... 5
1.1
1.2
INTRODUCTION........................................................................................................... 5
SPECIFICATIONS ........................................................................................................ 5
2.0 OPERATION .......................................................................................... 7
2.1
2.2
INTRODUCTION........................................................................................................... 7
OPERATING PROCEDURE ......................................................................................... 7
2.2.1 Channel Selection............................................................................................ 7
2.2.2 All Channel Key Procedure.............................................................................. 7
2.2.3 Cutoff Frequency ............................................................................................. 7
2.2.4 Input Gain (Pre-Filter) ...................................................................................... 7
2.2.5 Output Gain (Post Filter) .................................................................................. 7
2.2.6 Mode of Operation ........................................................................................... 8
2.2.7 Filter Type ........................................................................................................ 8
2.2.8 Input Coupling.................................................................................................. 8
2.2.9 Clear Entry Key Operation ............................................................................... 8
2.2.10 Storing Set-Ups................................................................................................ 8
2.2.11 Recalling Set-Ups ............................................................................................ 9
2.2.12 Second Function Key Operation ...................................................................... 9
FILTER CHARACTERISTICS ....................................................................................... 9
2.3.1 Introduction ...................................................................................................... 9
2.3.2 Variable Band-Pass and Band-Reject Operation............................................. 9
2.3.3 Amplitude Response........................................................................................ 10
2.3.4 Phase Response.............................................................................................. 11
2.3.5 Group Delay..................................................................................................... 11
2.3.6 Transient Response......................................................................................... 11
2.3
3.0 IEEE-488 STD (GPIB) PROGRAMMING ............................................... 13
3.1
3.2
3.3
3.4
INTRODUCTION........................................................................................................... 13
FILTER TYPE ............................................................................................................... 13
MODE OF OPERATION ............................................................................................... 13
DEVICE CLEAR............................................................................................................ 13
4.0 INCOMING ACCEPTANCE ................................................................... 15
4.1
4.2
4.3
INTRODUCTION........................................................................................................... 15
TEST EQUIPMENT REQUIRED................................................................................... 15
FILTER CHARACTERISTICS ....................................................................................... 15
4.3.1 Low Pass/High Pass Response....................................................................... 15
4.3.2 Cutoff Frequency Accuracy.............................................................................. 16
4.3.3 Band-Pass/Band-Reject Response ................................................................. 16
4.3.4 Stopband Attentuation* .................................................................................... 17
*(This
procedure requires a Fluke Model 8920A voltmeter)
4.3.5 Pre-Filter and Post-Filter Gain Accuracy ......................................................... 17
4.3.6 Noise Check
(This procedure requires a Fluke Model 8920A voltmeter)
........ 18
4.3.7 Distortion and Maximum Signal Checks .......................................................... 18
4.3.8 AC/DC Coupling Check ................................................................................... 19
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