Krohn Hite 31A User Manual
Model 31A
1Hz to 99kHz
Elliptical High-Pass
Plug-In Filter Card
for Model 3905B/3916B 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
31 SERI
ES
HIGH-PASS ELLIPTICAL
PLUG-IN FI
LTER
MODULES
MODEL 31-1 : 1Hz to 99kHz
MODEL 31
MODEL 31-3 : O.O
-2:
a.1Hz to 9.9kHz
lHz
to 990Hz
OPERATING AND MAINTENANCE
MODEL
MODEL
MODEL
MODEL
MODEL
MODEL
MODEL
MODEL
FILT
SIN
SIN
SIN
SIN
SIN
SIN
S
IN
SIN
MAl\
ER
TUAL
MO
DUL
MODEL
MODEL
MODEL
MODEL
MODEL
MODEL
MODEL
MODEL
ES
SIN
SIN
SIN
SIN
SIN
SIN
SIN
SIN
MAIN
MODEL
--
FR
AME
SIN
KRO H
255 Bo d
Tel: (50
--
N-RI
well
TE
Street, Avon,
8)580-166
MI
MODEL
CORP ORAT
MA
02322-9987
0; Fax:
(508)583-89
CROPRO
__
ION
89
CES SOR
SIN
__
Pr int e d 11/90 US A
Model 31
Table of Contents
Table of Conte ts
1.0 GENERAL
INTRODUCTION 1-1
1.1
1.2
SPECIFICATIONS 1-1
2.0 OPERATION 2-1
2.1
INTRODUCTION 2-1
2.2 TURN-ON
2.3
SELF-TEST FEATURE 2-1
2.4 FRONT PANEL CONTROLS and DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.5 F1LTER CHARACfERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.5
2.5
2.6 VARIABLE BANDPASSand BAND
2.7
PHASE RESPONSE 2-4
3.0 IEEE-488
INTRODUCTION 3-1
3.1
3.2
FILTER TYPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.3
MODE
3.4
DEVICE CLEAR 3-1
4.0 INCOMING ACCEPTANCE
INTRODUCTION 4-1
4.1
4.2
TESTEQUIPMENT REQUIRED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.3
PRE-FILTER AND POST-FILTER GAIN ACCURACY . . . . . . . . . . . . . . . . . . . . . 4-1
4.4 PASSBANDGAIN AND DISTORTION TESTS 4-1
4.4
4.4.2
4.4
4.4.4
4.5 STOPBAND ATTENUATION 4-3
4.5 .1
4.5.2
4.5 .3
4.5.4
4.6 CUTOFF FREQUENCY ACCURACY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.7 NOISE MEASUREMENTS 4-4
DESCRIP110N
PROCEDURE
.1
INTRODUCTIO
.2
1
kHz
AMPLIT
N
UDE R
ESPONS
srn (GPID) PROGRAMMING . . .
OF
OPERATION 3-1
...
•...
.1
LOW
HIGH
.3
HIGH
HIGH
BAND
BAND
BAND
BAND
BANDS
BAND
BAND
BAND
RIPPL
RIPPL
RIPP
RIPPL
E R
ESPO
E R ESPONSE (Mod
LE R ESPON
E RESP O NSE
1 4-3
2 4-3
3 4-3
4 4-3
E
REJE
CT OPERATION 2-3
... . ....
.
...............
.
..
....
. . . . . . .
.................
..
NSE 4-2
el
31
-1)
SE
(Mode l 31 -2 ) 4-2
(Model
31-
3)
.•..
1-1
2-1
2-2
2-2
. 3-1
4-1
4-2
4-3
Table of Contents
Model
31
ii
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