HP 4280A Operation manual

OPERATION AND SERVICE MANUAL
MODEL 4280A
IMHz C METER/C-V PLOTTER
(Including Option 001)
SERIAL NUMBERS
This manual applies directly to instruments with
serial numbers prefixed 2346J.
With changes described in Section VII, this manual
also applies to instruments with serial numbers
prefixed 23 I5J.
For additional important information about serial
numbers, see INSTRUMENTS COVERED BY
MANUAL in Section I.
0 COPYRIGHT: YOKOGAWA-HEWLETT-PACKARD, LTD., 1983
9-1, TAKAKURA-CHO, HACHIOJI-SHI, TOKYO, JAPAN
I
Manual Part No. 04280-90001
Microfiche Part No. 04280-90051
Printed: OCT. 1985

Model 4280A Table of Contents
TABLE OF CONTENTS
Section Title
I GENERAL INFORMATION
Page Section
3-38.
3-41.
;:;: Introduction . . . . . . . . . . . l-l
Description . . . . . . . . . . . . l-l
l-10. Specifications . . . . . . . . .
l-12. Safety Considerations . . . ;:;
1-15. Instruments Covered by
Manual . . . . . . . . . . . . . . l-3
l-20. Options . . . . . . . . . . . . . . . . 1-3
l-22. Option 001 . . . . . . . . . . . . . 1-3
1-23.
Other Options . . . . . . . . . . l-3
l-24. Accessories Supplied . . . l-28
l-26. Accessories Available . . . l-28
3-43.
3-46.
3-48.
3-52.
3-54.
3-56.
3-58.
3-60.
II INSTALLATION 3-62.
g::: Introduction . . . . . . . . . . . 2-l
Initial Inspection . . . . . 2-l
2-5. Preparation for Use . . . . 2-1
2-6. Power Requirements . . . . . 2-l
2-8. Line Voltage and Fuse
Selection . . . . . . . . . . . 2-l
Z-10. Power Cable . . . . . . . . . . . . 2-l
2-14. Interconnections . . . . . . . 2-2
2-16. Operating Environment . . . 2-2
2-19. Installation
Instructions . . . . . . . . 2-4
2-21. Installation of Options
907, 908 and 909 . . . . 2-4
2-23. Storage and Shipment . . . 2-4
2-24. Environment . . . . . . . . . . . . 2-4
2-26. Packaging . . . . . . . . . . . . . . 2-4
3-64.
3-66.
3-68.
3-70.
3-72.
3-74.
3-76.
3-78.
3-80.
3-82.
3-84.
III OPERATION
3-l.
Introduction . . . . . . . . . . . 3-l
3-3. Operating
3-5.
3-7.
3-9.
3-12.
3-17.
3-21.
3-23.
3-26.
3-29.
3-31.
3-33.
3-35.
Instructions . . . . . . . . 3-2
Panel Features . . . . . . . . . 3-2
Self Test . . . . . . . . . . . . . . 3-16
Measurement Functions
and Measurement
Modes . . . . . . . . . . . . . . . 3-16
Displays . . . . . . . . . . . . . . . 3-17
Initial Display and
Control Settings . . . . 3-22
Error Codes . . . . . . . . . . . . 3-22
Test Signal . . . . . . . . . . . . 3-30
Measurement Speed . . . . . . 3-30
Measurement Ranges . . . . . 3-30
Connection Mode . . . . . . . . 3-30
UNKNOWNTerminals . . . . . . 3-33
How to Connect a Test
Sample . . . . . . . . . . . . . . 3-33
3-86.
3-88.
3-90.
3-92.
3-94.
3-96.
3-98.
3-100.
3-102.
3-104.
3-106.
3-108.
Title Page
Equivalent Circuits . . . . 3-34
Internal Error
Correction . . . . . . . . . . 3-35
MATH Function . . . . . . . . . . 3-36
Digit Shift . . . . . . . . . . . . 3-37
Internal DC Bias Source
Safety Features . . . . . 3-37
Usable Accessories . . . . . 3-38
External Triggering . . . . 3-39
External Error
Correction . . . . . . . . . . 3-39
C Mode . . . . . . . . . . . . . . . . . 3-40
Internal DC Bias
Source . . . . . . . . . . . 3-40
Internal DC Bias
Operation . . . . . . . . 3-40
Internal DC Bias
Source Output
Limit and Range
Control . . . . . . . . . . 3-41
External DC Bias . . . . 3-41
Measurement
Example . . . . . . . . . . 3-41
C-V Mode . . . . . . . . . . . . . . . 3-52
Bias Sweep
Parameters . . . . . . . 3-52
START V . . . . . . . . . . . . . 3-52
STOP V . . . . . . . . . . . . . . 3-52
STEP V . . . . . . . . . . . . . . 3-52
HOLD TIME . . . . . . . . . . . 3-56
STEP DELAY TIME . . . . . 3-56
C-V Mode Measurement
Example . . . . . . . . . . 3-56
C-t Mode . . . . . . . . . . . . . . . 3-62
C-t Parameters . . . . . . 3-62
PULSE V . . . . . . . . . . . . . 3-62
MEAS V . . . . . . . . . . . . . . 3-63
NO OF READINGS . . . . . . 3-63
th . . . . . . . . . . . . . . . . . . 3-63
td . . . . . . . . . . . . . . . . . . 3-63
Pulse Bias Source . . . 3-63
Connection Mode
Selection . . . . . . . . 3-64
DC Offset for Pulsed
Biasing . . . . . . . . . . 3-64
C-t Mode Measurement
with Internally
Supplied Bias
Pulse . . . . . . . . . . . . 3-68
th (Pulse Bias Width)
Setting Range . . . . 3-68
i

Table of Contents Model 4280A
TABLE OF CONTENTS
Section
3-110.
3-112.
3-114.
3-116.
3-118.
3-120.
3-122.
3-124.
3-126.
3-128.
3-130.
3-132.
3-134.
3-136.
3-139.
3-141.
3-143.
Title Page
td (Measurement
Interval ) Setting
Range . . . . . . . . . . .
External DC Offset
of Internally
Supplied Pulse
Bias Voltage . . . .
Example of Internally
Biased C-t Mode
Measurement . . . . .
C-t Mode Measurement
Using Externally
Supplied Bias
Pulse . . . . . . . . . . .
Measurement
Integration
Mode . . . . . . . . . . . .
BURST Integration
Mode . . . . . . . . . . . .
SAMPLING Integration
Mode . . . . . . . . . . . .
Using an External
Pulse Generator for
Pulse Biasing . . .
SYNC OUTPUT . . . . . . . .
DC Offset of
Externally
Supplied Pulse
Bias Voltagee . . .
External Pulse Bias
Slow c-t
Measurement . . . . .
DC Bias Offset for
SLOWc-t
Measurements . . . .
Bias-Pulse Width (th)
Settable Range
(SLOW C-t) . . . . . .
Measurement Interval
(td) Settable Range
(SLOW C-t) . . . . . .
External Pulse Bias
SLOWc-t
Measurement
Example . . . . . . . . .
External Pulse Bias
FAST C-t
Measurement . . . . .
Connection Modes
and Internal Bias
Mode Selection
for FAST C-t
Measurement . . . . .
3-68
3-68 3-151.
3-68
3-72
3-72
3-72
3-72
3-73
3-73
3-73
3-76
3-76
3-76
3-164.
3-166.
3-168.
3-170.
3-172.
3-174.
3-176.
3-178.
3-180.
3-182.
3-184.
3-186.
3-188.
3-190.
3-192.
3-194.
3-196.
3-76 3-198.
3-76
3-80
3-80
Section
3-147.
3-149.
3-154.
3-156.
3-161.
3-200.
3-204.
3-206.
3-208.
Title Page
DC Bias Offset for
FAST C-t
Measurements . . . . 3-80
Bias Pulse Width (th)
Settable Range
(FAST c-t) . . . . . . 3-80
Measurement Interval
(td) Settable
Range (FAST
C-t) . . . . . . . . . . . . 3-81
External Pulse Bias
FAST C-t Measure-
ment Example . . . . 3-81
X-Y Recorder Outputs . . 3-84
C-High Resolution
(Option 001 Units
Only) . . . . . . . . . . . . . . 3-88
HP-IB Interface . . . . . . . 3-92
HP-IB Interface
Capabilities . . . . . . . 3-92
Connection to HP-IB . . . 3-92
HP-IB Status
Indicators . . . . . . . . . 3-92
LOCAL Key . . . . . . . . . . . . . 3-92
HP-IB Address
Switches . . . . . . . . . . . 3-92
TALK ONLY Mode . . . . . . . . 3-93
ADDRESSABLEMode . . . . . . 3-94
Remote Program Codes . . . 3-94
Setting Parameters
via the HP-IB . . . . . . 3-100
Data Output . . . . . . . . . . . 3-102
Output Data Format . . . . 3-102
ASCII Format . . . . . . . . . . 3-102
BINARY Format . . . . . . . . . 3-103
Data Transfer Mode . . . . 3-105
Block Data Transfer
Mode . . . . . . . . . . . . 3-106
How to Get into
Block Data
Transfer Mode . . . 3-106
How to Get out of
Block Data
Transfer Mode . . . 3-106
Number of Measure-
ment Points . . . . . 3-107
Outputting
Measurement Data
in Block Data
Transfer Mode . . . 3-107
Output Data Formats
in Block Data
Transfer Mode . . . 3-107
Standard Data
Transfer Mode . . . 3-108
ii

Model 4280A Table of Contents
TABLE OF CONTENTS
Section Title Page
3-210. Data Format in
Standard Data
Transfer Mode . . . 3-108
Output Data Formats
in Standard Data
Transfer Mode . . . 3-109
Isolate Function . . . . . . 3-111
Restrictions on Changing
Connection Modes . . . 3-111
LEARN Mode . . . . . . . . . . . . 3-111
Service Request Status
Byte . . . . . . . . . . . . . . . 3-116
4280A Programming
Guide . . . . . . . . . . . . . . 3-118
3-212.
3-214.
3-216.
3-218.
3-220.
3-222.
Appendix External Error
Correction . . . . . . . A-l
IV PERFORMANCETESTS
4-l.
4-3.
4-5.
4-7.
4-9.
4-l 1.
4-13.
4-19.
4-21.
4-23.
4-25.
Introduction . . . . . . . . . .
Equipment Required . . . .
Test Record . . . . . . . . . . .
Calibration Cycle . . . . .
Test Frequency Accuracy
Test . . . . . . . . . . . . . . .
Test Signal Level
Accuracy Test . . . . . .
Measurement Accuracy
Tests . . . . . . . . . . . . . .
Internal Bias Voltage
Accuracy Test . . . . . .
RECORDEROUTPUTS
Voltage Accuracy
Test . . . . . . . . . . . . . . .
HP-IB Interface Test . . .
Conductance Measurement
Accuracy
Confirmation
Check . . . . . . . . . . . . . .
4-l
4-l
4-l
4-l
4-7
4-8
4-9
4-15
4-17
4-18
Section
5-17.
5-19.
5-21.
5-23.
5-25.
5-27.
5-29.
5-31.
5-33.
5-35.
5-37.
5-39.
5-41.
5-43.
5-45.
5-47.
5-49.
5-51.
5-53.
Title Page
Al4 Switching
Frequency
Adjustment . . . . . . . . . . 5-6
All Reset Circuit
Adjustment . . . . . . . . . . 5-7
Al4 +5V Adjustment . . . . . 5-9
A5 +12OV Adjustment . . . . 5-10
A4 Oscillator Level
Adjustment . . . . . . . . . . 5-11
A8 Integrator Offset
Adjustment . . . . . . . . . . 5-12
A8 Auto Zero
Adjustment . . . . . . . . . . 5-14
A8/A7 Test Signal
Phase Adjustment . . . . 5-15
A7 Tracking
Adjustment . . . . . . . . . . 5-17
A8 90' Phase
Adjustment . . . . . . . . . . 5-19
A8 S/H Gate
Adjustment . . . . . . . . . . 5-21
A2 DC Offset
Adjustment . . . . . . . . . . 5-23
A6 Loop Phase
Adjustment . . . . . . . . . . 5-25
A6 Bandpass Filter
Adjustment . . . . . . . . . . 5-28
A6 I-V Offset
Adjustment . . . . . . . . . . 5-29
A2 Range Resistor
Adjustment . . . . . . . . . . 5-30
A3 26dB L-R Amplifier
Adjustment . . . . . . . . . . 5-31
A4 DC Bias Supply
Adjustment . . . . . . . . . . 5-33
A10 Analog Output
Adjustment . . . . . . . . . . 5-35
VI REPLACEABLEPARTS
4-27
V ADJUSTMENTS
5-l. Introduction . . . . . . . . . . 5-l
5-3. Safety Requirements . . . 5-l
5-7. Equipment Required . . . . 5-l
5-9. Factory Selected
Components . . . . . . . . . 5-l
5-11. Adjustment
Relationships . . . . . . 5-5
5-13. Adjustment Locations . . . 5-5
5-15. Initial Operating
Procedure . . . . . . . . . . 5-5
6-l. Introduction . . . . . . . . . . . 6-l
6-3. Abbreviations . . . . . . . . . . 6-l
6-5. Replaceable Parts
List . . . . . . . . . . . . . . . . 6-l
6-7. Ordering Information . . . . 6-2
6-10. Direct Mail Order
System . . . . . . . . . . . . . . 6-2
VII MANUAL CHANGES
:::: Introduction ........... 7-l
Manual Changes ......... 7-l
...
111

Table of Contents Model 4280A
TABLE OF CONTENTS
Section
VIII SERVICE
Title Page
8-l.
8-3.
8-5.
8-7.
8-9.
8-11.
8-13.
8-15.
8-17.
8-19.
8-25.
8-27.
8-28.
8-30.
8-33.
8-36.
8-40.
8-42.
8-45.
8-47.
8-49.
8-51.
8-53.
8-55.
8-57.
8-59.
Introduction ........... 8-l
Safety
Considerations ...... 8-1
Theory of Operation .... 8-l
Recommended Test
Equipment ........... 8-l
Troubleshooting ........ 8-l
Repair ................. 8-l
Basic Theory ........... 8-2
Connection Modes ....... 8-2
Vector-Voltage-Current
Measurement ......... 8-2
Vector Voltage Ratio
Detector ............ 8-4
Digital Control ........ 8-5
Block Diagram
Discussion .......... 8-6
Analog Measurement
Section ............. 8-6
Signal Source .......... 8-6
Connection Mode
Switching Circuit .... 8-6
I-V Converter .......... 8-7
Vector Ratio
Detector ............ 8-9
Process Amplifier ...... 8-9
Phase Detector ......... 8-10
A-D Converter .......... 8-10
Auto-Zero Circuit ...... 8-10
Integrator ............. 8-10
Auto-Phase Adjust
Circuit ............. 8-11
Zero Cross Detector .... 8-11
Internal Bias Source .... 8-11
Option 001 C Offset
(Al board) .......... 8-12
iv

Model 4280 A List of Tables
LIST OF TABLES
Number Title Page
l-l.
1-2.
l-3.
3-l.
3-2.
3-3.
3-4.
3-5.
3-6.
3-7.
;:;:
3-12.
3-13.
3-14.
3-15.
3-16.
3-17.
3-19.
3-20.
3-22.
3-23.
3-25.
3-26.
3-28.
3-29.
3-30.
3-31.
3-32.
3-33.
3-34.
3-35.
Specifications ............. l-4
Supplemental Performance
Characteristics ......... l-22
Accessories Available ...... l-29
Power on Self Test ......... 3-18
Standard Self Test ......... 3-18
Overflow Annunciations ..... 3-23
Operation Error Codes ...... 3-23
Dissipation Factor
Equations and Equivalent
Circuit Conversion
Formulas ................ 3-34
Usable Accessories ......... 3-38
Internal DC Bias Source
Ranges .................. 3-40
Auto-Ranging Mode .......... 3-40
Internal DC Bias Source
V LIMIT vs Range ........ 3-41
START V Resolution ......... 3-52
STEP V Resolution .......... 3-52
HOLD TIME Resolution ....... 3-56
PULSE V Resolution ......... 3-62
th Resolution .............. 3-63
Connection Mode
Selection ............... 3-64
td Setting Range ............ 3-68
Connection Modes for SLOW
and FAST C-t Mode
Measurements ............ 3-72
DC Offset of External
Pulse voltage ........... 3-73
Bias-Pulse Width (th)
Settable Range (SLOW
C-t) .................... 3-76
Measurement Interval (td)
Settable Range
(SLOW C-t) ............... 3-77
Bias-Pulse Width (th)
Settable Range (FAST
C-t) .................... 3-80
Measurement Interval (td)
Settable Range
(FAST C-t) .............. 3-81
Usable Ranges for C-HIGH
RESOLN .................. 3-88
HP-IB Interface
Capabilities ............ 3-92
HP-IB Mode Selection ....... 3-93
Output Data Delimiters -
TALK ONLY Mode (51) ..... 3-93
Output Data Format -
TALK ONLY Mode .......... 3-94
Remote Program Codes ....... 3-95
Remote Program Codes for
Measurement
Parameters .............. 3-99
Number
3-36.
3-37.
3-38.
3-39.
3-40.
3-41.
3-42.
4-l.
4-2.
4-3.
4-4.
4-5.
4-6.
4-7.
4-8.
4-9.
4-10.
4-11.
4-12.
5-l.
5-2.
5-3.
6-1.
6-2.
6-3.
7-l.
7-2.
Title Page
Output Data Transfer Modes
and Formats . . . . . . . . . . . . . 3-102
Number of Measurement
Points When Block Data
Transfer Mode Is
Used . . . . . . . . . . . . . . . . . . . . 3-107
Program Codes for
Outputting Block
Data . . . . . . . . . . . . . . . . . . . . 3-107
Data Format Program
Codes . . . . . . . . . . . . . . . . . . . 3-108
LEARN Mode . . . . . . . . . . . . . . . . . 3-112
Sample Programs . . . . . . . . . . . . 3-118
Data Transmission Times . . . . 3-118
Recommended Equipment . . . . . . 4-A
Test Frequency Accuracy
Test Limits . . . . . . . . . . . . . 4-7
Test Signal Level Accuracy
Test Limits . . . . . . . . . . . . . 4-8
Open Test Limits . . . . . . . . . . . 4-9
Capacitance Standard
Test Limits (CNlO) . . . . . . 4-11
Capacitance Standard Test
Limits (CN13) . . . . . . . . . . . 4-12
Capacitance Standard Test
Limits (CN15) . . . . . . . . . . . 4-14
Internal Bias Voltage
Accuracy Test Limits . . . . 4-16
RECORDEROUTPUTSVoltage
Accuracy Test Limits . . . . 4-17
Controller Instructions
and Operator Responses
for Test Program 1 . . . . . . 4-21
Controller Instructions
and Operator Responses
for Test Program 2 . . . . . . 4-23
Controller Instructions
and Operator Responses
for Test Program 3 . . . . . . 4-26
Adjustable Components . . . . . . 5-2
Factory Selected
Components . . . . . . . . . . . . . . 5-4
Adjustment Requirements . . . . 5-5
List of Reference
Designators and
Abbreviations . . . . . . . . . . . 6-1
Manufacturers Code Lists . . . . 6-2
Replaceable Parts . . . . . . . . . . 6-3
Manual Change by Serial
Number . . . . . . . . . . . . . . . . . . 7-l
Summary of Changes by
Assembly . . . . . . . . . . . . . . . . 7-2
V

List of Illustrations Model 4280A
LIST OF ILLUSTRATIONS
Number
l-l.
l-2.
2-l.
2-2.
2-3.
;:::
3-3.
3-4.
3-5.
3-6.
3-7.
3-8.
3-9.
3-10.
3-11.
3-12.
3-13.
3-15.
3-16.
Title Page
Model 4280A and
Accessories . . . . . . . . . . . . . . l-l
Serial Number Plate . . . . . . . . l-3
Voltage and Fuse
Selection . . . . . . . . . . . . . . . . 2-2
Power Cables Supplied . . . . . . 2-3
Rack Mount Kit . . . . . . . . . . . . . 2-5
Contents of Section III . . . . 3-l
Front Panel Features . . . . . . . 3-2
Rear Panel Features . . . . . . . . 3-14
Interchanging Measurement
Functions and
Measurement Modes . . . . . . . . 3-19
Maximum Display Value,
Display Digits, and
Resolution for the C
Display . . . . . . . . . . . . . . . . . . 3-20
Maximum Display Value,
Display Digits, and
Resolution for the G
Display . . . . . . . . . . . . . . . . . . 3-21
AUTO Ranging Operation . . . . . 3-31
Connection Modes . . . . . . . . . . . 3-32
Two-Terminal Pair
Configuration . . . . . . . . . . . . 3-33
Floating Test Sample
Connection . . . . . . . . . . . . . . . 3-33
Grounded Test Sample
Connection . . . . . . . . . . . . . . . 3-33
Connection Using a Wafer
Prober . . . . . . . . . . . . . . . . . . . 3-32
External Triggering
Signal . . . . . . . . . . . . . . . . . . . 3-39
Procedure for Setting
Interna 1 DC Bias
Voltage . . . . . . . . . . . . . . . . . . 3-42
Procedure for Setting V
LIMIT . . . . . . . . . . . . . . . . . . . . 3-42
3-17(a). External DC Bias
Application up to
+142V . . . . . . . . . . . . . . . . . . . . 3-43
3-17(b). External DC Bias
Application up to
?2OOV . . . . . . . . . . . . . . . ...*. 3-44
3-18. C Mode Measurement
Example . . . . . . . . . . . . . . . . . . 3-46
3-19. HP-19 Controlled C Mode
Measurement Example . . . . . . 3-48
3-20. Bias Sweep Set-up
Procedure . . . . . . . . . . . . . . . . 3-54
3-21. C-V Mode Measurement
Example . . . . . . . . . . . . . . . . . . 3-57
3-22. HP-19 Controlled C-V Mode
Measurement Example . . . . . . 3-59
vi
Number
3-23.
3-25.
3-26.
3-27.
3-28.
3-29.
3-30.
3-31.
3-32.
3-33.
3-34.
3-35.
3-36.
3-37.
3-38.
3-39.
3-40.
3-41.
3-42.
4-l.
4-2.
4-3.
4-4.
4-5.
4-6.
4-7.
Title Page
Procedure for Setting C-t
Mode Parameters . . . . . . . . .
Internal Pulse Bias C-t
Mode Measurement
Example . . . . . . . . . . :. . . . . .
HP-19 Controlled Internal
Pulse Bias C-t Mode
Measurement Example . . . . .
BURST Integration Mode . . . . .
SAMPLING Integration
Mode . . . . . . . . . . . . . . . . . . . .
External Pulse Generator
Connection . . . . . . . . . . . . . .
Pulse Generator Output
Controlled by SYNC
OUTPUT Signal . . . . . . . . . . .
External Pulse Bias SLOW
C-t Measurement
Example . . . . . . . . . . . . . . . . .
HP-19 Controlled External
Pulse Bias SLOWC-t
Measurement Example
External Pulse Bias FAST""'
C-t Measurement
Example . . . . . . . . . . . . . . . . .
HP-19 Controlled External
Pulse Bias FAST C-t
Measurement Example . . . . .
Procedure for Setting up
an X-Y Recorder to
Plot c-v
Characteristics . . . . . . . . .
C-HIGH RESOLN Function . . . . .
HP-19 Address Switches . . . . .
Block Data Transfer Mode . . . .
Standard Data Transfer
Mode . . . . . . . . . . . . . . . . . . . .
LEARN Mode Program
Example . . . . . . . . . . . . . . . . .
4280A Status Byte . . . . . . . . . .
Sample Programs . . . . . . . . . . . .
Test Frequency Accuracy
Test Setup . . . . . . . . . . . . . .
Test Signal Level Accuracy
Test Setup . . . . . . . . . . . . . .
Open Test Setup . . . . . . . . . . . .
Capacitance Standard Test
Setup (CNlO) . . . . . . . . . . . .
Capacitance Standard Test
Setup (CN15) . . . . . . . . . . . .
Internal Bias Voltage
Accuracy Test Setup . . . . .
RECORDEROUTPUTS Voltage
Accuracy Test Setup . . . . .
3-65
3-69
3-70
3-74
3-75
3-73
3-73
3-78
3-79
3-82
3-83
3-86
3-90
3-93
3-106
3-109
3-112
3-116
3-120
4-7
4-8
4-9
4-10
4-13
4-15
4-17

Model 4280A
LIST OF ILLUSTRATIONS
List of illustrations
Number
4-8.
4-9.
5-l.
5-2.
5-3.
5-4.
5-5.
5-6.
5-7.
5-8.
5-9.
5-10.
5-11.
5-12.
5-13.
5-14.
5-15.
5-16.
5-17.
5-18.
Title Page
HP-IB Interface Test
Setup . . . . . . . . . . . . . . . . . . . . 4-18
Conductance Measurement
Accuracy Confirmation
Check Setup . . . . . . . . . . . . . . 4-27
Al4 Switching Frequency
Adjustment Setup . . . . . . . . . 5-6
Reset Circuit Adjustment
Setup . . . . . . . . . . . . . . . . . . . . 5-7
Al4 +5V Adjustment Setup . . . . . 5-9
A5 +12OV Adjustment
Setup . . . . . . . . . . . . . . . . . . . . 5-10
A4 Oscillator Level
Adjustment Setup . . . . . . . . . 5-11
A8 Integrator Offset
Adjustment Setup . . . . . . . . . 5-12
Waveform at A8TP4 (SLOPE
AMP OUT) . . . . . . . . . . . . . . . . . 5-13
A8/A7 Test Signal Phase
Adjustment Setup . . . . . . . . . 5-15
A7 Tracking Adjustment
Setup . . . . . . . . . . . . . . . . . . . . 5-17
A8 90" Phase Adjustment
Setup . . . . . . . . . . . . . . . . . . . . 5-19
A8 S/H Gate Adjustment
Setup . . . . . . . . . . . . . . . . . . . . 5-21
A2 DC Offset Adjustment
Setup . . . . . . . . . . . . . . . . . . . . 5-23
A6 Loop Phase Adjustment
Setup . . . . . . . . . . . . . . . . . . . . 5-25
Waveform at A6TPll . . . . . . . . . . 5-27
A2 Range Resistor
Adjustment Setup . . . . . . . . . 5-30
A3 26dB L-R Amplifier
Adjustment Setup . . . . . . . . . 5-31
A4 DC Bias Supply
Adjustment Setup . . . . . . . . . 5-33
A10 Analog Output
Adjustment Setup . . . . . . . . . 5-35
Number
8-l.
8-2.
;I;:
8-5.
8-6.
8-7.
8-8.
8-9.
8-10.
8-11.
8-12.
Title Page
4280A Block Diagram . . . . . . . . . 8-2
Basic Connection Modes . . . . . . 8-3
I-V Converter . . . . . . . . . . . . . . . 8-3
Phase Detection Vector
Diagram . . . . . . . . . . . . . . . . . . 8-4
Vector Voltage Ratio
Detection Timing . . . . . . . . . 8-5
Signal Source Block
Diagram . . . . . . . . . . . . . . . . . . 8-6
Connection Mode Switching
Circuit Block Diagram . . . . . 8-7
I-V Converter Block
Diagram . . . . . . . . . . . . . . . . . . 8-8
Vector Representation of
the Vector Modulator
outputs . . . . . . . . . . . . . . . . . . 8-9
Vector Ratio Detector
Block Diagram . . . . . . . . . . . . 8-10
Internal Bias Source
Block Diagram . . . . . . . . . . . . 8-11
Al C Offset Block
Diagram . . . . . . . . . . . . . . . . . . 8-12
vii