Table of Contents
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Model 451iA
Sec tion
Title
1-l.
1-2.
II
2-1.
General . .
. . . . .
.
2-2.
Operating Ins tructions .
2-3 .
2-4.
2-5.
2-6.
Special Measuring Techniques
1II
THEORY OF OPERATION
3-1 .
Introduc tion
Probe Head
3- 2.
Amplifier
3-3.
Number
Title
L-l.
General A rrangement of Model 456A
Model 456A AC Current Probe . . . .
1 -2.
Typical Change in F requency Response
1-3.
with Load Capacitanc e . . .
�
2-1.
P robe used with
2-2.
•
.
.
.
.
Jaws . . . .
2-3.
2-4.
Illustra ting Development of
.
2-5.
Title
Numbe r
.
L - 1 .
Specifications .
�
L-2.
Ins truments for use with 456A
00395-1
TABLE O F
Pa ge
1 -1
L -
1 -2
2 - L
2-1
2-1
2-1
2- 1
2-4
3-1
3-1
3- 1
3- 1
LIST O F Ill U S T RATIO NS
Page
L- L
1-1
1-2
Mcxiel 302A
2 - L
2-2
.
.
.
.
•
2-3
2-3
. . .
.
.
. .
2-4
LIST O F T A BLES
Page
L-O
. .
1 - 1
CONTENTS
Section
I V
MAINTENA NCE .
L
4- L.
General . .
4-2.
Cabinet Removal
4-3.
O peration o n 230 Volt AC
4-4.
Chec king the Ba tteries . .
4-5.
Replacing the Ba tteries
4 -6.
Converting to AC-Opera ted Model .
4- 7.
Tes t Equ ipment Requ ired
4- 8.
Fron t Pan el Performance Check
4- 9.
Trouble Localiza tion .
4-10. Sem i-Conduc tor Replacement
4- U.
Calibration . .
4-12 .
Frequency Response
4-1 3 .
Replacing the P robe Cable
V
REPL ACEAB LE PARTS
5-1.
Introduc tion .
Table of Replaceable Part s
5-2.
5-3.
Orde ring Information
Numbe r
Bucking Out C a pac itive Component
2-6.
of Plate Current
3-1 .
3-2.
4- 1 .
4-2 .
Calibration and Frequency Response .
4-3.
Expl oded View of Probe Assembly
4-4.
Schematic Diagram
Number
4-1 .
Replacement
5-1.
Replaceable Pa rts
Ta ble of Contents
Lis t of Illustrations and Ta bles
Title
. .
. .
Title
.
.
.
.
.
.
. .
.
Model 456A
Title
Page
4- L
4-L
4-1
4-L
4- 1
4-1
4-3
4- 3
4-3
4- 3
4-4
4-4
4-4
4-4
5-1
5- L
5- 1
5-1
Page
2-5
3-L
3- 1
4-0
4-2
4- 5
4- 0
Page
4-4
5-2
iii
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