HP 1707B Service manual
m
r-
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b
F
P
OPERATING AND
SERVICE
MANUAL
OSCILLOSCOPE
1707B
HEWLETT
~-
-
_-
-
PACKARD
.
OPERATING AND SERVICE MANUAL
MODEL
1707B
OSCILLOSCOPE
4
SERIALS
Refer to Section
standard options:
and
631.
PREFIXED:
VI1
for instruments with the following
002,007,011,012,015,602,607,611
1410A
H
1900
Manual
Microfiche Number 01 707-908 16
Part
Number 01707-90916
EWLETT-PAC KA R D
GARDEN
OF
THE GODS ROAD, COLORADO SPRINGS, COLORADO, U.S.A.
COMPANY/COLO RA DO SPRINGS DIV
IS1
ON
PRINTED: APRIL
1974
SAFETY
SUMMARY
The following general safety precautions must be observed during all phases of operation, service, and repair
of this instrument. Failure to comply with these precautions
or
with specific warnings elsewhere
in
this
manual violates safety standards of design, manufacture, and intended use of the instrument. HewlettPackard Company assumes no liability for the customer's failure to comply with these requirements.
GROUND THE INSTRUMENT.
To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical
ground. The instrument is equipped with a three-conductor ac power cable. The power cable
must either be plugged into an approved three-contact electrical outlet
or
used with a three-
contact to two-contact adapter with the grounding wire (green) firmly connected to an elmtrical
ground (safety ground) at the power outlet. The power jack and mating plug of the-power cable
meet International Electrotechnical Commission
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.
Do
not operate the instrument
in
the presence of flammable gases
(IEC)
safety standards.
or
fumes. Operation of any
electrical instrument in such an environment constitutes a definite safety hazard.
KEEP
AWAY
FROM LIVE CIRCUITS.
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified maintenance personnel.
Do
not replace components with
power ca ble connected. Under certain conditions, dangerous voltages may exist even with the
power cable removed.
To
avoid injuries, always disconnect power and discharge circuits before touching them.
DO NOT SERVICE
Do
not attempt internal service
OR
ADJUST ALONE.
or
adjustment unless another person, capable of rendering first
aid and resuscitation, is present.
USE CAUTION WHEN EXPOSING
Breakage of
the
cathode-ray tube (CRT) causes a high-velocity scattering of glass fragments
(implosion). To prevent
Handling of the
CRT
shall be done only by qualified maintenance personnel using approved
OR
HANDLING THE CRT.
CRT
implosion, avoid rough handling or jarring of the instrument.
safety mask and gloves.
DO NOT SUBSTITUTE PARTS
Because of
the
danger of introducing additional hazards,
OR
MODIFY INSTRUMENT.
do
not install substitute parts
or
perform any
un-
authorized modification to the instrument. Return the instrument to a Hewlett-Packard Sales and Service
Office for service and repair to ensure that safety features are maintained.
DANGEROUS PROCEDURE WARNINGS.
Warnings, such as the example below, precede potentially dangerous procedures throughout this
manual. Instructions contained in the warnings must be followed.
I
Dangerous voltages, capable of causing death, are present in this instrumezt.
Use
extreme
caution when handling, testing, and adjusting.
Model
1707H
TABLE
Section Page
I
GENERAL INFORMATION
1.1
1.4
1.5
1.7
1-1
1.17
1.20 .
1.22 .
1.24 .
1.26 .
1.30 .
I1 INSTALLATION .........................
2.1
2.3 .
2.6 .
2.7
2-1
2.13
2- 15 .
2.17 .
2.19 .
I11 OPERATION
3.1
3.3
3.5
3.7
3.9
3.11
3.13
3.15
3.17
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
J
I
I
3.42 .
3.44
3.46 .
Introduction
.
.
Description
.
.
1
.
.
.
.
1
.
.
.
.
.
.
.
.
.
.
.
.
. B
.
.
.
.
.
.
.
.
Introduction
Vertical Circuits
Horizontal Circuits
Cathode-ray Tube
Warranty
Accessories Furnished
Accessories Available
Instrument and Manual
Identification
Inquiries
Introduction
Initial Inspection
Preparation for Use
Power Requirements
Three-conductor AC Power
Cable
DC
Battery Installation
Claims
Repacking for Shipment
Introduction
Controls and Connectors
Beam Finder
Scale Illumination
Trace Align
Calibrator
Focus and Astigmatism
Coupling
Display
Trig
Polarity
Sweep Display
Ext
Main Sweep
Mixed Sweep
Delayed Sweep
Time/Div
Vernier
Trigger Level
Trigger Holdoff
Slope
......................
.......................
......................... 1-5
..........................
...................... 2-1
.......................
Plug
......................
............................
.............................
......................
...................... 3-1
........................
.........................
............................
...................... 3-4
Horiz Input
....................... 3-4
.........................
............................ 3.4
..............
..................
..............
............
.................
............ 1-5
.............
................... 1-5
.................
............... 2-1
..........
...........
.......... 2-2
..........
....................
.............. 3-1
.....................
.........
..................
................. 3-4
.................... 3-4
...................
.................. 3-4
...................
.................
1-1
1-1
1 . 1
1-1
1-1
1-1
1-5
1-5
1-5
2-1
2-1
2-1
2-1
2-2
2-2
2-2
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-4
3-4
3-4
3-4
3-4
3-4
3-4
OF
CONTENTS
Section Page
IV PRINC11’1,ES OF OPERATION
3.48 .
3.51 .
3.54 .
3.56 .
3.58
.
3.59
.
3.61
.
3.63
.
3.65 .
3.67
.
3.69 .
3.71 .
3.73
.
3.75 .
3.77 .
3.80 .
4.1
.
4.3
.
4.6 .
4.8
.
4-
10
.
4-12
4.14
.
4-
16
.
4.21 .
4.24 .
4.27
.
4..31
.
‘1
-;
35
.
4.41
.
4.44
.
4.46
.
4.48
.
4.53 .
4.79
.
4.81
.
4.86
.
4.104 .
4-1 19 .
4.124
4- 130
4.148 .
4.156 .
4.158 .
4.162
4.165 .
4.174 .
Sweep Mode
Trigger Selection
Magnetic Interference
Battery Recharge Operation
Preoperational Adjustments
Initial Turn.on
Focus and Astigmatism Adjust
Operating Procedures
Operators Performance Check
Operating Information
Auto Versus
Auto Versus
AC Versus DC
Mixed Sweep
Delayed Sweep
Line Sync
Introduction ......................
Block Diagram Discussion
Input Attenuator
Vertical I’rcamplifier
1)cllay
Vertical Output Amplifier
Trigger Circuits
M
ai n In t egr a t o r
Holdoff and Comparator
I
)el ay ed Integra tor
‘l’iming Sequence
Horizontal Mode Assembly
I.
ow
Voltage Power
High Voltage Power Supply
Gate Amplifitr
Detailed Circuit Theory
Input Attenuators
Vertical Preamplifier
Delay Line
Vertical Output Amplifier
Trigger Circuits
Main Integrator
Holdoff and Comparator
.
Delayed Integrator
.
Horizontal Mode
Gate Assembly
Calibrator
Horizontal Preamplifier and
Output Assemblies
Indicator Drivers
.
Low Voltage Power
Supply
High Voltage Power
Supply
....................
................
............. 3-5
..................
.............
............
Norm
..............
Trig
...............
.................. 3-7
....................
..................
....................... 3-7
...........
..............
I.ine
....................
...............
...............
............
..............
Supply
................
..........
.............. 4-4
...........
.....................
................
................
............ 4-10
..............
.................
.....................
...........
..............
.......................
.......................
....... 3-5
.......
.. 3-6
..... 3-6
.......
..........
.....
......
....
....
...
...... 4-6
......
3-5
3-5
3-5
3-5
3-6
3-7
3-7
3-7
3-7
3-7
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4-1
4
.
4-2
4-2
4-;3
4-:3
4-;j
4-3
4-4
4-4
4-4
4-6
4-6
4-8
4-10
4-11
4-13
4-14
4-14
4-14
4-14
4-16
1
111
Table of Contents
Model 1707B
TABLE
Section Page
V
PERFORMANCE: CHECK AND
A1)JUS’I’ME:NTS
5.1
5.3
5.5
5.8
5.10
5-
5.13
5.18
5.23
5.28
5.33
5.38
5.43
5.48
5.53
5.58
5.63
5.68
5.73
5-78
5.83
5.88
5.93
5.98
5.103
5.108
5-113
5.118
5.123
5.128
5-133
5.138
5.142
5.143
5.148
5.153
5.157
5.162
5.167
5.172
5.177
5.181
5-
Introduction
.
Test Equipment
.
Performance Check
.
Front-panel Adjustments
.
Front-panel Settings
.
Performance Tests
12
.
Deflection Factor
Rise time
Handwidth
A+B Mode
Alt Mode
Chop Mode
Single Sweep
Auto
Z
Axis
Beam Finder
Coupling Switch
Input Resistance
Common Rejection Ratio
(CMRR)
Main
Delayed Sweep Time
Delay Time Accuracy
Delay Time Linearity
Delay Jitter
Main Triggering
Delayed Triggering
Main Trigger Level Range and
Polarity
Delayed Trigger Level Range
and Polarity
Ext Horizontal Bandwidth
Ext Horizontal Deflection
Factor
Calibrator
Adjustments
Adjust Procedures
Low
Adjustment
High
Adjustment
Intensity Limit Adjustment
Y-Axis
Gate Amplifier Response
Adjustment
Trigger Amplifier Balance and
DC
Trigger Sensitivity
Position Centering Adjustment . 5-22
Sweep Length Adjustment
Main Sweep Timing
Adjustment
185
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.......................
......................
...................
...............
..........
..............
................
.............
.....................
....................
......................
.......................
.....................
...................
Trig
Recovery Time
Sensitivity
...............
....................
................
................
......................
Sweep Time
...............
............
..........
..........
....................
...............
............
......................
.................
......................
.....................
.....................
................
Voltage Power Supply
..................
Voltage Power Supply
..................
Alignment
..............
..................
Adjustment
.............
.............
..................
OF
........
....
....
.....
CONTENTS
5-1
5-1
5-1
5-1
5-
5-1
5-1
5-1
5-2
5-3
5-3
5-4
5-4
55
5-5
56
5-6
5-6
5-7
5-8
5-8
5-9
5-10
511
5-12
5-13
5-14
5-15
5-16
5-16
5-17
5-17
5-19
5-19
5-19
5-19
5-20
520
5-20
5-21
5-21
5-22
523
(Cont’d)
Section Page
5.190
5.195
5.200
5.205
5.210
5-2
1
VI REPI.ACEAH1. E PARTS
VI1
VI11 SCHEMATICS ANI) TROUH1.E:
15
5.220
5.225
5.230
6.1
.
6.3
.
MAZNUAI. CHANGES AN!)
7.1
.
7.3
.
7.5
.
7.9
.
SHOOTING
8.1
.
8.3
.
8.8
.
8-
12
8-
1.5
8-
17
8.22
8.27
8.29
8-:3
1
8..n
8..35 .
8437
8.42
8.44
.
8.46
.
8.48
.
Delayed Sweep Time
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Adjustment
X10 Gain Adjustment
Mag Centering Adjustment
Calibrator Adjustment
Ext Horiz Input Compensation . 5-25
Ext
Horiz
Low-frequency Pulse Response
Adj
............................
Input Capacitance and Attenuator
Compensation Adjustment
High-frequency Pulse
Response Adj
Introduction
Ordering Information
Introduction
Manual Changes
Special Options
Standard Options
............................
Introduction
Schematics
Reference Designations
Component
Preventive Maintenance
Mechanical Inspection
Switch Maintenance
Repair and Replacement
CRT Removal and Replace-
ment
Vertical Amplifier Module
Removal and Replacement
Delay line Removal and
Replacement
Attenuator Removal
Replacement
Removal and Replacement
Assemblies in Horizontal
Amplifier Module
Power
Removal and Replacement
Power
assembly and Reassembly
Semiconductor Removal and
Replacement
At
t
e
n
u
..................
Gain Adjust
...............
.................
......................
.............
OP‘I’IONS
......................
..................
...................
.................
......................
.......................
...........
I.
ocations
........................
S
u
p p
1
Supply
a
t o r Ser vi c i n
.............
................ 8-3
................
...........
y
Mod
u
1
e
Module
................
g
..........
....
.........
.........
. .
....
.
..........
........
..........
..........
. . 8-3
and
of
IXs-
. .
..........
5-23
524
524
5-25
5-26
5.26
5-26
5-27
6-1
6-1
6-1
7-1
7-1
7-1
7-1
7-1
8-1
8-1
8-1
8-1
8-1
8-1
8-1
8-2
8-2
8-2
8-3
8-5
8-5
8-5
8-6
8-6
iv
Model 1707B
Table of Contents
List of Illustrations
TABLE
)
Section Page Section Page
8.50 . Circuit Hoards
8.52
.
8.54
.
8.56
.
8.60
.
Figure Title Page Figure Title Page
.
1.1 Model 1707R Oscilloscope 1-0 5.12
1.2
.
Instrument Serial Number
1.3
2.1
2.2 Battery Pack Installation 2-2 5-16 . EXT Horizontal Bandwidth
3.1
3.2
1
3.3
3.4
3.5
3.6
3.7
4.1
4.2
4.3
4.4
5.1
5-2
5.3
5-4
55
5-6
5-7
58
59
5-10
5-11
Service Kit for HP 1700-series
.
Oscilloscopes
.
Rear Panel Power Module
.
.
Controls and Connectors 3-2
Sweep Combinations
.
.
DC BAL Adjust
.
CALAdjust
Algebraic Addition and Differential
.
Operation
Delayed Sweep
.
Mixed Sweep
.
Timing Sequence
.
Step-by-step operation of the
.
.
.
.
.
.
.
.
.
.
.
.
Gate Schmitt Trigger
Step-by-step operation of the Set-
reset Multivibrator 4-9
Blanking Sequence
Deflection Factor Test Setup
Rise time Test Setup
Bandwidth Test Setup
A+B
Input Resistance Test Setup
CMRR Test Setup
Main Sweep Time Test Setup
Delayed Sweep Time Test Setup
Delay Time Accuracy Test Setup
.
Delay Time Linearity Test Setup
Delay Jitter Test Setup
.
Hoard Connect ions
Servicing Etched Circuit
Hoards
Integrated Circuit Replace- 8-7 1
ment 8.6 8.73
Service Kit
.............................
............................
...........................
Mode Test Setup
.....................
.............
.......................
.........................
.....................
...............
............
.......................
...............
...............
................
....................
.........................
.........................
........................
...............
..................
...................
............
....................
.................
..................
.............
.......................
............
.................
OF
LIST
OF
........
.......
.......
CONTENTS (Cont'd)
8-6
8-6
8.6
8.7
8.62
.
8.64
.
8.66 . Troubleshooting
8.69
.
.
.
8.75
.
Soldering
Aids
.........................
Heat Sink Removal
DC Voltages
Waveforms
Test Points
Circuit Checking
ILLUSTRATIONS
.
Main Triggering
5.13
.
1-5
1-6
2-1 Polarity Test Setup
3-5
3-8 Test Setup
3-9
3-10
3-11
3-12
4-2
4-7
4-12
5-2
5-3
33
5-4
5-7
5-8
5-8
5.10
5.10
5.11
5.12
5.14
5.15
517
518
5-19
6-1
6-2
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8-8
8-9
8-10
8.11
8.12
8.13
8-14
8-15
Delayed Triggering Test Setup
Main Trigger Level Range and Polarity
.
Test Setup
.
Delayed Trigger Level Range and
Test Setup
EXT
.
Horizontal Deflection Factor
...........................
...........................
...........................
.
Calibrator Test Setup
Adjustment
.
Knob Locator
.
Mechanical
.
Vertical Module Mechanical Parts
.
.
.
.
.
.
.
.
.
Removal
Attenuator Removal
Semiconductor Terminal Identification
Component Identification. Interior Front
and rear Panel
Component and Assembly Locations . 8-23
Vertical Module A5 Component
Identification
Horizontal Module A6 Component
Identification
Main Block Diagram
Power Supply Block Diagram
Attenuator Component Identification . 8-28
.
Attenuator Schematic
.
Vertical Preamplifier Assembly A5A4
.
Component Identification
Vertical Preamplifier Assembly
.
A5A4
Vertical Preamplifier Assembly
.
A5A4
.
Vertical Preamplifier Assembly A5A4
Component Identification
..........................
...........................
Parts
..............................
......................
......................
..............................
................................
Tool.
Solder. and
............
...................
...................
....................
....................
...............
Test
Setup
............
.........
................
..................
Locator
.....................
...............
....................
.................
........
................
..........
............
8-7
8.8
8.8
8.8
8.8
8.8
8.9
5.13
5.14
5.15
5-16
5.17
5.17
5.18
529
6-2
6-3
8-4
8-4
. .
8-7
8-23
8-24
8-24
8-25
8-27
8-29
830
8-31
8.33
8.34
V
List of Illustrations
List
of
Tables
LIST
OF
ILLUSTRATIONS
(Cont‘d)
Model
1707B
Figure Title Page
8.16
8.17
8.18
8.19
8.20
8-21
8.22
8.23
8.24
8.25
8.26
8.27
8-28
8.29
8.30
8.31
Vertical Preamplifier A5A4 and Vertical
.
Output Amplifier A5A5
Vertical Preamplifier A5A4
.
Trigger Assembly A6A2 Com-
.
ponent Identification
Trigger Assembly A6A2
.
Trigger Assembly A6A2
.
.
Horizontal Mother Board A6A1
Component Identification
.
Main Integrator A6A3
Component Identification
Main Integrator A6A3
.
.
Main Sweep Time Assembly A6A5
Component Identification
Main Sweep Time Assembly A6A5
.
Delayed Integrator A6A4 Component
.
Identification
Delayed Integrator A6A4
.
Delayed Sweep Time Assembly A6A6
.
Component Identification
Delayed Sweep Time Assembly
.
A6A6
................................
Holdoff and Comparator A6A7
.
Component Identification
.
Holdoff and Comparator A6A7
........................
..............
............
.................
................
................
............
............
.................
............
...............
............
............
.....
.........
8.35
8.37
8.38
8.39
8.41
8-42
8.42
8.43
8.44
8.45
8.46
8.47
8.48
8-49
8.50
8-51
Figure Title Page
8.32
8.33
8-34
8.35
8-36
8.37
8.38
8.39
8.40
8.41
8.42
8.43
8.44
8.45
8.46
8.47
8.48
8.49
8.50
Horizontal Mode Assembly A6A8
.
Component Identification
EXT Horizontal Amplifier Assembly A8.
.
Component Identification
Horizontal Mode Assembly A6A8
.
Horizontal Preamplifier Assembly A6A9
.
Component Identification
Horizontal Output Amplifier Assembly
.
A6A10 Component Identification
Horizontal Preamplifier and Output
.
Assemblies A6A9 and A6A10
Gate Assembly A4 Component
.
Identification
Gate Assembly A4
.
High Voltage Oscillator A3A4
.
Component Identification
High Voltage Oscillator A3A4
.
.
Line Rectifier A2 Component
Identification
Low Voltage Mother Board A3A1
.
Component Identification
.
Power Input and Line Filters
.
Low Voltage Converter Assembly
A3A2 Component Identification
.
Low Voltage Converter Assembly
A3A2
..............................
.
Line Rectifier and Filter A3A3
Component Identification
Line Rectifier and Filter A3A3
.
.
Horizontal Mother Board A6A1
Horizontal Preamplifier A6A9
.
Voltage Distribution
........................
...................
......................
............
............
............
..........
..........
.........
..........
...............
......
.....
........
........
....
.......
......
8.52
8.52
8.53
8.54
8.54
8.55
8.56
a57
8-58
8-59
a60
8-60
8-61
a62
8-63
864
a65
8-67
868
Table
1.1
.
1.2
.
5.1
.
5.2
.
5.3
.
5.4
.
5.5
.
5.6
.
5.7
.
5.8
.
5.9
.
6.1
.
vi
LIST
OF
TABLES
Title Page Table
Specifications
Model 1707H Accessories Available
Recommended Test Equipment
Ileflection Factor Accuracy
Main Sweep Performance Check
Delayed Sweep Performance Check
Performance Check Record
Power Supply Voltage Limits
Main Sweep Time Adjustments 5-23 8.4
Ilelayed Sweep Time Adjustments
Square-wave Adjustment
Capacitance Adjustment
Abbreviations for Replaceable Parts
List
...................................
...........................
. .
1-5/14? 6.3
..........
..............
........
....
.........
..........
.........
......
.............
.............
1-2
5-0
5-2
5-9
5-11
5.18a
‘5-19
5-24
5-27
5-27
6-1
6.2
8.1
8.3
8.5
7.1
8.2
8.6
Title Page
Replaceable Parts
.
List of Manufacturers’ Code
.
Model 1707H Standard Options
.
Etched Circuit Soldering Equipment
.
Model 1707H Assembly Locations
.
Schematic Notes
.
.
Troubleshooting Low Voltage
Power Supply
.
Troubleshooting High Voltage Power
Supply.
Troubleshooting Vertical
.
Deflection
CRT.
.......................
.......................
......................
Gate
.................
..........................
..........
..........
.....
.......
6-5
6-25
7-2
8-8
8-9
8-10
8-11
8-13
8-16
Model
1707B
LIST
OF
TABLES
List of Tables
(Cont’d)
Table
8-7.
8-8.
8-9.
8-
10.
8-1 1.
8-
12.
8-13.
8-14.
8-15.
8-16.
8-17.
Title Page Table Title Page
Troubles hooting Horizontal
Troubleshooting Time Base
Block Diagram Measurement
Conditions
Schematic 4 Measurement Con-
ditions and Waveforms..
Schematic 5 Measurement Con-
ditions and Waveforms..
Schematic 6 Measurement Con-
ditions and Waveforms..
Schematic 7 Measurement Con-
ditions and Waveforms.. 8-36
Schematic 8 Measurement Con-
ditions and Waveforms..
Schematic 9 Measurement Con-
ditions and Waveforms..
Schematic 10 Measurement Con- 8-25. Schematic 19 Measurement Con-
ditions and Waveforms..
Schematic
ditions..
..........................
11
Measurement Con- 8-26. Schematic 20 Measurement Con-
...........................
..........
..........
...........
...........
...........
...........
...........
...........
...........
8-
19
8-20
.8-24
8-31
8-32
83-34
8-38
8-40
843 ditions..
8-44 ditions and Waveforms..
8-18.
8-19. Schematic
8-20. Schematic
8-21. Schematic
8-22. Schematic 16 Measurement Con-
8-23. Schematic 17 Measurement Con-
8-24. Schematic
Schematic 12 Measurement Con-
ditions and Waveforms..
13
Measurement Con-
ditions..
ditions and Waveforms..
ditions and Waveforms.
ditions and Waveforms..
ditions and Waveforms.
ditions and Waveforms.
...........................
14
Measurement Con-
15
Measurement Con-
18
Measurement Con-
...........
...........
............
...........
............
............
...........................
...........
8-46
8-48
8-50
8-52
8-54
8-56
8-58
8-60
8-62
vii
i
Gcncral Information
Model 1707B
1-0
<.*
-"
Figure
1-1.
Model 1707B Oscilloscope
1707-PO01
Model 1707B
1
I
h
General Information
SECTION
I
GENERAL INFORMATION
1-1.
INTRODUCTION.
1-2.
This
manual provides operating and service
information for the Hewlett-Packard Model 1707B
i
Oscilloscope (figure
1-1).
This manual
is
divided into
eight sections, each covering a specific topic or
aspect of the instrument. All schematics are located
at
the rear of the manual.
the manual are instruction cards located
Also
located
at
the rear of
in
an
envelope attached to the inside back cover. These
cards explain the function of each instrument control.
The card
is
designed to fit the inside lid of the front
panel storage cover.
1-3. This section contains a description of Model
1707B. Instrument specifications are listed in table
1-1.
Table 7-2 lists the options available for Model
1707B.
1-4.
DESCRl PTION.
1-10. With the dual-trace feature, displays can be
obtained on either channel A or B, channels A
and B together, channels A + B, and channels A
-
B. Simultaneous display of two signals
is
possible
in either chop or alternate mode of operation. During
chop operation, channels are switched
at
an approximate rate of 400-kHz during each sweep. In the
alternate mode of operation, the signal applied to
each channel
Triggering
is
displayed on alternate sweeps.
is
selectable from either A ONLY TRIG
or NORM TRIG position. In the NORM TRIG position,
the instrument triggers on the displayed signal.
In the A ONLY TRIG position, the instrument
triggers on the signal applied to channel A.
1-11.
HORIZONTAL CIRCUITS.
1-12. The horizontal circuits provide four types of
sweep displays. The displays are main sweep, mixed
sweep, delayed sweep and external horizontal input.
1-5.
INTRODUCTION.
1-13.
Operation of the delayed sweep while in the
main sweep mode provides trace intensification.
1-6. The Model 1707B
is
a
general-purpose, wideband oscilloscope designed for bench or field service.
The Model 1707B operates from an ac line, dc line
or optional battery pack. The optional ,rechargable
nickel cadmium batteries provide up
to
4% hours of
operation and require a recharge time of approximately
of transportation and
14
hours. A carrying handle provides ease
is
adjustable, allowing the
Model 1707B to be placed at an angle for viewing
the CRT.
i
1-7.
VERTICAL CIRCUITS.
The amount of intensification width depends on the
delayed front panel settings. In the delayed mode,
the intensified portion is displayed across the entire
CRT.
1-14.
Sweep speed settings from 0.1 usec/div to
2 sec/div (main sweep) and 0.1 usec/div to
0.2 sec/div (delayed sweep) are available in
a
1,
2,
sequence. Vernier controls allow continuous adjustment between steps and extend the slowest sweep
to 5 sec/div (main sweep) and
0.5
sec/div (delaved
>I
sweep). Using the magnifier function, the fastest
sweep speed can be expanded to 10 ns/div. The
5
mixed sweep function provides for simultaneous
1-8.
Vertical bandwidth
is
75
MHz with a rise time
less than 4.7 ns. Maximum vertical deflection factor
is
10 mV/div. The Model 1707B contains two identical
vertical amplifiers for single or dual channel
display of an input waveform and an expanded
portion of the waveform.
The delayed circuits are
calibrated, permitting accurate time difference meas-
urements to be made.
operation. Each channel offers a choice of ac or
1-15.
dc coupling. Common mode rejection
dB
at 10 mV/div, and
20
dB
for the rest of the
deflection ranges.
is
at
least .40
The main and delayed trigger circuits have
provisions for either internal or external operation.
Choice of trigger coupling
is
provided; ac/dc,
high
frequency reject, and low frequency reject. The
1-9. Nine calibrated switch settings provide
a
deflection factor range from 10 mV/div to 5 V/div in
a
1, 2, 5 sequence. The vertical verniers permit
continuous adjustment between calibrated steps and
extend the least sensitive deflection factor
div) to
at
least 12.5 V/div.
(5
V/
delayed trigger circuit does not have low frequency
reject trigger coupling.
1-16.
An external horizontal input allows the use of
an external signal to drive the horizontal deflection
plates of the CRT.
1-1
General Information Model 1707B
Table
1-1.
Specifications
IERTICAL AMPLIFIERS
MODES OF OPERATION:
channels A and B displayed alternately on
successive sweeps (alt); channels
displayed by switching between channels
at approximately 400-kHz rate with blanking
during switching (chop); channel A + channel
B
(algebraic addition).
EACH CHANNEL
Bandwidth:
(2)
(Direct or with Model 10006B
probe, 3-dB down from 50-kHz, 6-div reference signal from terminated 5@ohm
source.)
DC-COUPLED: dc
AC-COUPLED: lower limit
tely
10
Hz.
Risetime:
probe, 10%
<4.7
ns
to
90%
step from terminated 50-ohm source.
DEFLECTION FACTOR
Ranges:
from 10 mV/div to 5 V/div
in 1,
2,
5
sequence;
vernier in calibrated position.
Vernier:
continuously variable between all
ranges, extends maximum deflection factor
to
at
least 12.5 V/div.
channel A; channel B;
A
to
75 MHz.
is
approxima-
direct or
with
Model 10006B
points with 6 div input
*3%
accuracy with
(9
and B
ranges)
Common Mode (A
-
B)
FREQUENCY: dc to 1 MHz.
REJECTION RATIO:
mV/div;
at
least
at
least
40
20
dB on all other ranges
with verniers set for optimum rejection.
Common-mode signal amplitude equivalent
to 30 div.
TR
I
G GE
RI
N
G
Normal Trigger:
A only trigger:
on displayed signal.
on signal from channel A.
MAIN TIME BASE
SWEEP
Ranges:
ranges) in 1,
with vernier
Vernier:
ranges, extends slowest sweep to
5
dicates when vernier
Magnifier:
and extends fastest sweep to 10 ns/div;
accuracy *5% (including
time base).
from 0.1 usec/div to 2 sec/div (23
2,
5
sequence; *3% accuracy
in
calibrated position.
continuously variable between all
sec/div; vernier uncalibrated light
is
not in
CAL
expands all sweep by factor of 10
3%
accuracy of
dB
on 10
at
least
position.
in-
Polarity:
NORM or INVT selectable on chan-
nel B.
Signal Delay:
ficiently
input signals are delayed
to
view leading edge of input
signals without advanced external trigger.
Input
RC
1
megohm
mately
Input Coupling:
24
pF.
*2%,
shunted by approxi-
AC, DC or GND selectable.
GND position disconnects signal input and
grounds amplifier input.
MAXIMUM INPUT
AC-coupled:
5
V/div
*600V (dc + pk ac);
to
20 mV/div; <150V
rms
ac <350V,
at
10 mV/div
(10 kHz or less).
DC-coupled:
<150V
A + B OPERATION
Amplifier:
<350V (rms) 5 V/div to
at
10 mV/div (10 kHz or less).
20
bandwidth and deflection factors
are unchanged; channel B may be inverted
for A - B operation.
suf-
mV/div;
SWEEP MODE
Normal:
sweep
is
triggered by internal or
external signal.
Automatic:
of input signal; triggering
bright baseline displayed in absence
is
same
as
above 40 Hz.
Single:
in
normal mode, sweep occurs once
with same triggering
button
arms sweep and lights indicator; in
as
normal; reset push-
auto mode, sweep occurs once each time
RESET pushbutton
TRIGGER1 NG
Internal:
dc to
is
pressed.
35
MHz on signals causing 0.5
div or more vertical deflection, increasing to
1
div
at
75 MHz in all display modes except
chop; dc
External:
to
400 kHz in chop mode.
dc
to
35
MHz on signals 50 mV p-p
or more, increasing to 100 mV p-p at 75 MHz.
External Input RC:
approximately 1 megohm
shunted by approximately 27 pF.
normal
1-2
Model
1707B
Table
1-1.
Specifications (Cont’d)
General Information
Level and Slope
INTERNAL
at
any point on vertical wave-
form displayed.
EXTERNAL continuously variable from
+12V
to
-1.2V on either slope of trigger
signal. Maximum input, *lOOV.
Coupling:
AC, DC, LF REJ, or HF REJ.
AC: attenuates signals below approximately
20 Hz.
LF REJ: attenuates signals below approxi-
mately 15 kHz.
HF REJ: attenuates signals above approxi-
mately 30 kHz.
TRIGGER HOLDOFF:
time between sweeps
continuously variable.
DELAYED TIME BASE
TRACE INTENSIFICATION:
of main time base to be expanded to full
screen in delayed time base mode. Rotating
time base switch from OFF position activates
intensified mode.
SWEEP
Ranges:
in 1,
0.1 usec/div to
2,
5
sequence;
brated position.
Vernier:
continuously variable between all
ranges, extends slowest sweep to 0.5 sec/div.
Magnifier:
expands all sweeps by a factor of
10 and extends fastest sweep to 10 ns/div;
accuracy *5% (including
time base).
SWEEP MODE
Trigger:
delayed sweep
delay period.
Auto:
delayed sweep
at end of delay period.
TRIGGERING
same
as
Internal:
External:
is
same
approximately
approximately
Level and Slope
INTERNAL
main time base.
as
main time base. Input RC
27
pF.
at
any point on vertical wave
form displayed.
EXTERNAL continuously variable from
+1.2V
to
-1.2V on either slope of trigger
signal.
intensifies
0.2
sec/div
*3%
with vernier
3%
is
armed
is
automatically triggered
1
megohm shunted by
that
(20
accuracy of
at
part
ranges)
in
cali-
end of
Coupling:
selectable, AC, DC, or HF REJ. AC
attenuates signals below approximately
Hz. HF REJ attenuates signals above approxi-
mately 30 kHz.
DELAY (Before start of delayed sweep.)
Time:
continuously variable from
2
sec.
Time Jitter:
maximum delay
Calibrated delay Accuracy:
MIXED SWEEP
<0.005%
in
each sweep.
(1
part
fl%;
0.1
in
20,000)
linearity,
usec to
Combines main and delayed sweeps into
one display. Sweep
base and
is
is
started by main time
completed by faster delayed
time base.
EXTERNAL HORIZONTAL INPUT
BANDWIDTH:
COUPLl NG:
DEFLECTION FACTOR:
X10;
0.1
VERNIER:
adjustment between ranges.
DYNAMIC RANGE:
left edge of CRT with 0 to -5V input.
MAXIMUM INPUT
INPUT RC:
30
pF.
dc
to
1
MHz.
dc.
X1; 1 V/div.
V/div.
1O:l
vernier provides continuous
beam may be positioned to
*lOOV.
1
megohm shunted by approximately
CATHODE-RAY TUBE AND CONTROLS
TYPE:
potential; aluminized
phosphors available, refer to options).
GRATICULE:
major division consists of 5 subdivisions on
major axes; 1 div
TRACE ALIGN:
cule line.
BEAM FINDER:
of settings of vertical, horizontal, or intensity
controls.
INTENSITY MODULATION:
blanks trace of any intensity. Input R equals
1000 ohms
Maximum Input: lOV (dc plus pk ac).
post-accelerator, 22.2-kV accelerating
P31
phosphor (other
6
X 10 div internal graticule; each
=
1
cm.
aligns
trace with horizontal
returns trace to CRT regardless
+4V, dc to 1 MHz,
*lo%.
GENERAL
CALI B RAT0
Type:
Voltage:
1
kHz
1V
R
*lo%
pp
square wave.
*l%.
20
of
*O.Wo.
grati-
1-3
General Information
Table
1-1.
Specifications (Cont'd)
Model 1707B
c
3
1/8
(79.4)
1
7
TOP
1-
14 3/8(365.1)
MAX PROJECTION (1701A)
15 5/16(388.9)
MAX PROJECTION (1701A)
15 9/16(395.31
20 7/8 (530.2)
15
3/4 (400.1)
-1
-
NOTE:
DIMENSIONS IN INCHES
c
c
7 21/64
(1 86.1)
7
53/64
(198.0)
a-
b--11 15/64(286.1)
I
13 3/8(339.7)
AND
(MILLIMETERS)
-4
POWER REQUIREMENTS
AC Line:
DC Line:
Battery (optional)
OPERATING TIME: up
RECHARGE TIME: 14
LOW BATTERY INDICATOR: power light
RECHARGING: batteries are recharging
115V or 230V *20%, 48 to 440 Hz.
11.5V
to
36V.
to
4.5 hours.
hr
minimum charging
time for a fully discharged battery.
flashes
charged and further operation may damage battery.
whenever POWER MODE switch
switch
POWER switch ON, trickle charge
applied.
to
indicate that batteries are dis-
off,
full charge
is
applied; with
is
set to
is
ID
WEIGHT
Without Panel Cover:
ping, 35 lb (15.9 kg).
With Panel Cover and Accessories:
(12.3 kg); shipping,
With Panel Cover, Accessories, and Battery
net, 35 lb (16 kg); shipping, 46 lb
Pack:
(20.9 kg).
DI MENS1 ONS:
ENVIRONMENT (Oscilloscope operates within
specifications over following ranges):
temperature 0°C to +55"C; humidity, to 95%
relative humidity
ft;
vibration, in three planes for 15 min each
with 0.010-inch excursion,
ACCESSORIES FURNISHED:
Model 10115A; front panel storage cover,
Model 10101B; two Model 10006B probes;
and one ac power cord with right angle plug.
refer to outline drawing.
net, 24 lb
38
lb (17.2 kg).
to
40°C; altitude, to 15,000
(11
kg); ship-
net, 27 lb
10
to 55 Hz.
blue contrast filter,
1-4
Model 1707B
1-17. CATHODE-RAY TUBE.
1-18. The Model 1707B uses a post-accelerator CRT
with a nonglare, rectangular faceplate. An internal
graticule
to eliminate parallax errors. The CRT
mately 22 -kV accelerating potential, and 6 vertical
by 10 horizontal divisions. Each division
centimeter.
1-19. A type
CRT. Other types of phosphors are available by
special order. Refer to Section VI1 for further information about optional and special-order modifications.
is
located on the same plane
P31
phosphor
is
used in the standard
as
the display
has
approxi-
is
a
square
General Information
SERIAL PREFIX NUMBER SERIAL SUFFIX NUMBER
rZBirn*h
SERIAL
rJG
0000
A
00000
-\
COMPLETE SERIAL NUMBER
7000-A-22
Figure 1-2. Instrument Serial Number
I
NOTE
Due to phosphor burn sensitivity,
instruments with
not have the intensified function of
the beam finder.
a
P-11
phosphor do
1-20. WARRANTY.
1
CAUTION
The warranty may be void for instruments having a mutilated serial number
tag.
1-21. The instrument is certified and warranted
stated in the front of this manual. The CRT
covered by a separate warranty. The CRT warranty
and warranty claim form
this manual. Should the CRT fail
specified on the CRT warranty page, complete the
warranty claim form and return
CRT. The procedure for returning a defective CRT
is
described on CRT warranty page.
is
3
located
at
the rear of
within
it
with the defective
as
is
the time
1-28. Check the serial prefix number of the instrument. If the serial prefix number
that listed on the title page of this manual, refer
to Section VI1 for instructions
for proper instrument coverage.
1-29. Technical corrections to the manual are listed
under errata on an enclosed MANUAL CHANGES
sheet (if any).
is
different from
to
adapt this manual
1-30. INQUIRIES.
1-31.
Refer any questions regarding the manual,
the change sheet or the instrument to the nearest
HP Sales/Service Office. Always identify the
instrument by model number, complete name and
complete serial number in all correspondence. Refer
to the rear of the manual for a world-wide listing
of HP SaledService Offices.
Table 1-2. Model 1707B Accessories Available
1
Accessory No.
HP Model 10102A
I
Description
RFI Contrast Screen
I
1-22. ACCESSORIES FURNISHED.
I
1-23. Accessories furnished are listed in table
1-1.
HP Model 10103B
HP Model 10104A
Battery Pack
Viewing Hood (collapsible)
1-24. ACCESSORIES AVAILABLE.
Testmobile Adapter
Camera Adapter
Service Kit; contains three
extender boards and one
board puller.
1-25. Table 1-2 lists accessories available for the
Model 1707B. The service kit (figure
mended to maintain the Model 1707B.
1-3)
is
recom-
1-26. INSTRUMENT AND MANUAL IDEN-
FI
CAT1 ON.
TI
HP Model 10105A
HP Model 10106A
HP
01701-68701
1-27. This manual applies directly to Model 1707B
instruments with a serial prefix number
on the manual title page. The serial prefix number
is
the first group of digits in the instrument serial
number (figure 1-2). The instrument serial number
is
on a tag located on the rear panel.
as
listed
HP Model 10036A
Probe Adapter Kit: probe
tips contained in kit
are designed for use with
probes supplied with
1700-series oscilloscopes.
1-5
Gen era1
In
form ation
Model
1707B
Figure
1-3.
Service
Kit
for
HP
1700-series Oscilloscopes
1701A-R-1
I
1-6
Model 1707B
Installation
SECTION
I
NSTALLATI 0 N
2-1. INTRODUCTION.
2-2. This section contains instructions for performing an initial inspection of the Model 1707B. Installation procedures and precautions are presented
in step-by-step order. The procedures for making
a
claim for warranty repairs and for repacking the
instrument for shipment are also described
section.
2-3.
INITIAL INSPECTION.
2-4. The instrument was inspected mechanically and
electrically before shipment. Upon receipt, inspect
it
for damage that may have occurred in transit.
Check for broken knobs, bent or broken connectors,
and dents or scratches. If damage
is
to the claims paragraph in this section. Retain the
packing material for possible future use.
in
this
found, refer
II
c. Pull out lever under fuse. This removes fuse
(0.5 AT for 115V operation) from instrument.
d. Check to see
is
to right for 115V operation.
e.
For 230V operation, move slide switch to left
and install 0.25 AT fuse.
PLASTIC COVER A1
that
slide switch (figure 2-1)
F1
~
SLIDE
SWITCH
LEVER
1707A-R-16
)
1
Voltages are present inside instrument
when power switch
is
off and ac power
cord connected.
2-5. Check the electrical performance of the instrument immediately after receipt. Refer to Section V
for the performance check procedure. The performance check will determine whether or not the instrument
is
operating within the specifications listed in
table
1-1.
Initial performance and accuracy of the
instrument are certified
this manual. If the instrument does not operate
specified, refer to the claims paragraph
as
stated
in
the front of
in
as
this
section.
2-6.
PREPARATION FOR USE.
2-7.
POWER REQUIREMENTS.
2-8.
The Model
1707B
can operate from either
an
ac or dc power source. For ac operation, the Model
1707B requires
48- to 440-Hz source that can deliver
115-
or 230-volt *20%, single phase,
50
volt-amperes.
2-9. A sliae switch inside the rear panel power
module (figure 2-1), on the rear panel, determines
115- or 230-volt operation. To check or change the
position of this slide switch, proceed
a.
Turn instrument off and remove power cord
as
follows:
from rear panel.
b. Move plastic cover to left (figure 2-1).
Figure 2-1. Rear Pan61 Power Module
2-10. For dc operation, the Model 1707B requires
from
11.5
to 36 volts, 25 watts maximum. The
2 amp dc line fuse
3
amp fuse for DC LINE operation. The instrument
(Fl)
must be replaced with
a
can also be operated from a battery pack. Depending
on the power mode of operation, the POWER MODE
switch (on rear panel) should be set to one of three
positions: DC LINE, INTERNAL BATTERY, or
AC LINE.
Do not change the POWER MODE
switch setting with the instrument on
or
with
ac or dc power applied
to
the
rear panel.
a.
Turn instrument power
b.
Disconnect ac or dc power cord from rear
off.
panel.
c. Set POWER
MODE
switch to desired
position.
d.
Connect ac or dc powei cord if desired.
e. Turn instrument power on.
2-11.
THREE-CONDUCTOR AC POWER CABLE.
2-12. For the protection of operating personnel,
Hewlett-Packard Company recommends that the
strument panel and cabinet be grounded. This
in-
in-
2-1
Installation
Model 1707B
strument
is
equipped with a three-conductor ac power
cable that, when connected to an appropriate receptacle, grounds the instrument through the
offset pin. The power jack and mating plug of the
power cord meet International Electro-technical
Commission (IEC) safety standards. To preserve
this
protection feature when operating from a twocontact outlet, use a three-conductor to two-conductor
adapter, and connect the adapter wire to ground
at
the power outlet.
2-13.
2-14. A dc jack
DC
PLUG.
is
provided for operating from a dc
line. The cable used for the dc power cord should
be 2 wire (grounded) and must be able to carry
2.5A of current with a voltage loss of less than
1
volt.
2-15.
BATTERY INSl’ALLATION.
2-16. To install the battery pack in the Model 1707B,
proceed
as
follows:
Read operating note on battery pack
before inst all ation.
a.
Turn instrument off and remove power cord
from rear of instrument.
Move POWER MODE switch
b.
to
INTERNAL
BATTERY position.
Turn instrument on
c.
its
top and loosen fasten-
ers holding bottom cover.
d. Remove bottom cover.
Place battery pack in instrument
e.
as
shown
in
figure 2-2.
NOTE
Use only HP Model 10103B Battery Pack
with the Model 1707B.
SCREWS
f. Instal! two battery screws (figure 2-2).
g.
Connect
P1
to
Jl
(figure 2-2).
h. Replace bottom cover and tighten fasteners.
i.
Turn instrument right side up.
If power light
is
flashing, battery
is
discharged. Damage to the:battery may
occur if operated in this condition.
Refer to Section
I11
for battery recharging
operation.
Turn instrument on and observe power light.
j.
If power light
2-17.
2-18. The warranty statement applicable to
instrument
Refer to the front of
warranty statement also. If physical damage
or if operation
ment
is
is
on, resume normal operation.
CLAIMS
this
is
printed
is
received, notify the carrier and the nearest
not
in
the front
this
as
specified when the instru-
of
this
manual.
manual for the CRT
is
found
Hewlett-Packard Sales/Service Office immediately
(refer to the list in back of this manual for addresses).
The
HP
Sales/Service Office will arrange for repair
or replacement without waiting for settlement of
the claim with the carrier.
2-19.
2-20. If the Model 1707B
REPACKING
FOR
SHIPMENT,
is
to be shipped to
Hewlett-Packard Sales/Service Office for service or
repair, attach a tag showing owner
(with
address),
complete instrument serial number, and a description
of the service required.
2-21. Use the original shipping carton and packing
material. If the original packing material
is
not
available, the HP Sales/Service Office will provide
information and recommendations on materials to be
used. Materials used for shipping
an
instrument
normally include the following:
a
2-2
JI
PI
10103B-R-IA
Figure 2-2. Battery Pack Installation
a.
A double-walled carton with a test strength of
about
300
lb.
Heavy paper or sheets of cardboard to pro-
b.
tect all instrument surfaces; use a nonabrasive
material such
such
as
Kimpak around projecting parts.
as
polyurethane or cushioned paper
c. At least 4 inches of tightly-packed, industry-
approved, shock-absorbing material such
as
extra-
firm polyurethane foam.
d.
Heavy-duty shipping tape for securing outside
of carton.
Model 1707B
Operation
SECTION
OPERATION
3-1. I NTR 0 D U CTI ON.
3-2. This section provides general operating instructions and applications information for the Model
1707B. Front-and rear-panel controls and connectors
are identified and briefly described in
figure
Operational adjustments are shown in figures
and 3-4 and general operating instructions are shown
in figures
3-3.
3-5
through 3-7.
CONTROLS AND CONNECTORS.
3-4. The following paragraphs explain some of the
controls and connectors in detail.
3-5. BEAM FINDER.
3-6. Pressing this pushbutton increases intensity
and reduces amplifier gain enough to return beam
to viewing area. This enables the operator to locate
beam and determine the action necessary to center
a
display (examples: reduce input signal amplitude,
change coupling, adjust deflection factor, trigger
level, dc balance, position controls, or intensity).
When centered properly, the beam remains on the
CRT when the pushbutton
is
NOTE
released.
3-1.
3-3
111
3-1 1. CALIBRATOR.
3-12. The 1-volt, l-kHz square wave output of the
calibrator can be used for vertical sensitivity calibration and for divider probe compensation. The amplitude accuracy
*
10'70.
3-13. FOCUS AND ASTIGMATISM.
3-14. Both of these controls are used to obtain
a
sharp display. Normally, the ASTIGMATISM con-
trol need not be readjusted once
3-15. COUPLING.
3-16. This lever switch selects either capacitive
(AC) or direct (DC) coupling of the input signal to
the amplifier, or it grounds (GND) the amplifier
input stage while disconnecting the input signal.
The switch should be positioned to
long duration pulses
should be selected when viewing ac waveforms
having large dc levels. GND position
disconnect the signal source from the input of the
amplifier and at the same time grounds the input
of
the amplifier.
to establish a zero volt reference.
is
*l%
and the frequency accuracy
it
is
set.
DC
when viewing
or
dc levels of waveforms. AC
It
is
useful to use GND position
is
used
is
to
Due to phosphor burn sensitivity, instruments with
a P11
phosphor do not have
the intensified function of the beam
finder.
3-7. SCALE ILLUMINATION.
3-8.
This control adjusts the overall brightness of
the CRT graticule.
It
should be adjusted for good
contrast between the background and graticule. The
SCALE ILLUM control
is
especially useful when
using a hood to view the display or when photographing waveforms. Rotate the control to OFF
when scale illumination
3-9. TRACE ALIGN.
is
not needed.
3-10. The TRACE ALIGN adjustment compensates
for external magnetic fields that may affect the
alignment of the horizontal trace with the graticule.
The alignment should be checked when the instrument is moved to a new location and adjustment
made whenever necessary.
3-17. DISPLAY.
3-18. This switch selects the type of display. Input
signals may be displayed either singly or simultaneously
as
explained below.
Position A displays channel A input signals.
3-19.
3-20. Position B displays channel B input signals.
3-21.
Position A+B displays the algebraic sum of
the channel A and channel B input signals.
3-22. CHOP position presents a separate display
of
each input. Both inputs are displayed during the
same sweep by switching between each channel
rate of
400
kHz, This mode should be used to display
at
a
low frequency signals. A ONLY TRIG should be
used in the CHOP mode for stable triggering.
3-23. ALT position presents each channel on
alternate sweeps. This mode should be used to display high frequency signals. If the channel A and B
signals are time related, A ONLY TRIG will provide
3-
1
Operation Model
4-8 9-1 1 12 13 14
15
16
1707B
1-3
46
45
44
43
42 41 40 39 38 37 36 35 34 33 32
\\
El
\\.
'ORIZ INPUT
/
17
18
19
2025-
49
-24
-31
3-2
1.
SET FRONT PANEL POWER SWITCH TO OFF.
2.
SET
3. APPLY AC POWER
POWER
MODE
INTERNALBATTERY
@
c
53 52 51 50
Figure
31.
Controls and Connectors
FRONT
PANEL
POWER
MODE
SWITCH
TO
TO
INSTRUMENT.
c-3
[~y,lnrj
AC LINE
5/230
0'0
AC.
~
48-440
e'
a
I
Model
1707B
INTENSITY. Controls brightness of display.
1.
BEAM FINDER. Returns display to viewing
2.
area.
POWER-ON. Toggle switch for turning oscillo-
3.
scope on and off. Light illuminates when power
is
on. Light flashes when optional battery
discharged.
FOCUS. Adjusts writing beam for sharpest
4.
trace.
SCALE ILLUM. Controls brightness of scale
5.
illumination.
TRACE ALIGN. Adjust to align trace with hori-
6.
zontal graticule line.
CAL
1
7.
at 1 volt
ASTIGMATISM. Adjusts roundness of writing
8.
VOLT. provides
*I%.
1-kHz
square wave
spot.
DELAY TIME.
9.
start
of main sweep and
Selects time delay between
start
of delayed
sweep.
delayed VERNIER. Provides continuous con-
10.
trol of sweep time between calibrated positions
of delayed TIME/DIV switch.
delayed TRIGGER LEVEL. Selects amplitude
11.
point on trigger signal that
starts
sweep.
delayed TIME/DIV. Controls sweep time
12.
DELAYED mode. Controls intensified portion
of sweep in MAIN mode.
sweep display. Selects MAIN, DELAYED or
13.
MIXED SWEEP, or EXT HORIZ INPUT.
HORIZONTAL POSITION. Controls coarse
14.
and fine horizontal position of display.
is
delayed
in
VERNIER UNCAL. Lights when either main
16.
or delayed VERNIER
main VERNIER. Provides continuous control
17.
is
not in CAL position.
of sweep between calibrated positions of main
TIME/DIV switch.
18.
TRIGGER HOLDOFF. Provides continuous
control of time between sweeps. NORM holdoff
time
is
minimum.
main TRIGGER LEVEL. Selects amplitude
19.
point on trigger signal that
AUTO/TRIG.
20.
a.
AUTO. Delayed sweep
at
end of delay time.
b. TRIG. Delayed sweep arms
time and
is
ready to be triggered either
starts
starts
automatically
at
main sweep.
end of delay
internally or externally.
SINGLE. Selects single or normal sweep
21.
operation.
RESET. Resets sweep
22.
in
SINGLE sweep mode;
reset light indicates when sweep
AUTO/NORM.
23.
AUTO. Automatic sweep in absence of trig-
a.
ger signal or triggered sweep by
plying trigger signal above
b. NORM. Main sweep
is
40
triggered only by
applying trigger signal.
SWP
24.
MAG. In XI0 position, sweep
is
ten times.
HF REJ. Attenuates delayed sweep trigger
25.
signals above 30 kHz.
is
armed.
ap-
Hz rate.
magnified
main TIME/DIV. Controls sweep time in
15.
MAIN SWEEP mode.
26. AC/DC. Selects delayed sweep trigger signal
coupling.
INT/EXT. Selects internal or external sweep
27.
triggering for delayed sweeps.
INT/EXT. Selects internal or external sweep
28.
triggering for main sweep.
AC/DC. Selects main sweep trigger signal
29.
coupling.
30.
HF RE
J.
Attenuates main sweep trigger
signals above 30 kHz.
LF REJ. Attenuates main sweep trigger signals
31.
below
15
kHz.
NOTE
Depressing both HF REJ and LF REJ
selects a LINE SYNC mode of triggering.
main slope. Selects slope of main trigger
32.
signal that
EXT TRIG INPUTS. Main sweep external trig
33.
starts
sweep.
ger input.
EXT TRIG INPUTS. Delayed sweep external
34.
trigger input.
delayed slope. Selects slope of delayed sweep
35.
trigger signal.
VERNIER UNCAL. Lights when either ver-
36.
nier control
is
out of full clockwise CAL
detent position.
i
Operation
b. NORM TRIG. Instrument triggers on dis-
played signal except in ALT mode.
ALT mode
is
triggered on composite sync (LF REJ must be used to
maintain pro per triggering)
40.
INPUT. Input signal connects to BNC con-
.
nector.
41.
coupling. Selects capacitive (AC) or direct
(DC) coupling of input signal, or grounds
(GND) amplifier stage.
DC BAL. Adjust to minimize vertical shift of
42.
trace when vernier
43.
POSITION. Varies vertical position of display.
44.
CAL. Adjust to calibrate amplifier with setting
is
rotated.
of VOLTS/DIV switch.
45.
vernier. Provides continuous adjustments
of
volts/div between calibrated positions of
VOLTS/DIV switch.
46.
VOLTS/DIV. Selects vertical deflection
factor necessary for calibrated measurements
47.
ext horiz VERNIER. Permits
zont
a1
amplifier gain.
48.
EXT HORIZ INPUT. Input to external
1O:l
hori-
amplifier.
49.
Z AXIS INPUT. Z-axis input connector.
B
37.
38.
POLARITY. Controls channel B polarity.
DISPLAY. Selects display mode of channel A,
B,
A+B, CHOP or ALT.
trig.
39.
A ONLY TRIG. Internal trigger signal
a.
derived from channel A.
is
50.
AC LINE. Power input from ac line. Power
module contains ac line fuse (0.50 amp slowblow for 125V, 0.25 amp slow-blow for 230V)
and line selector switch.
51.
POWER MODE. Selects dc line, ac line or intern
a1
battery operati on.
52.
DC LINE. Power input for dc line operation.
53.
FUSE. 2 amp slow-blow fuse for all modes of
operation except DC LINE
(3
amp used in DC
LINE).
Controls and Connectors (Cont’d)
Figure
3-1.
3-3
Operation
Model
1707B
the most stable triggering. If the two signals are
not time related, then NORM TRIG should be used.
3-24. TRIG.
3-25. This switch selects the signal to be used
as
the internal trigger signal. In A ONLY TRIG position,
the signal on channel A is used
as
the internal
trig-
ger signal. In NORM TRIG position, the instrument
triggers on the signal being displayed, except in ALT
mode. In ALT mode, the instrument triggers on the
composite sync signal and LF REJ trigger coupling
should be used to maintain stable triggering.
3-26. B POLARITY.
3-27. This switch inverts the channel B display
180 degrees. This switch can also be used to present
an A-B display. Set DISPLAY to A+B mode. Put
R
POLARITY switch in INVT position. Display
observed is A-B.
3-28. SWEEP DISPLAY.
3-29. This switch, mounted concentric to the main
and delayed TIME/DIV controls, determines the hori-
zontal sweep display modes. Modes are EXT HORIZ
INPUT, MAIN SWEEP, MIXED SWEEP and DE-
LAYED SWEEP. The function of each mode is
as
fol-
lows:
3-36. DELAYED SWEEP.
3-37. Main sweep is not displayed in this mode.
The sweep speed
is
controlled by delayed TIME/
DIV.
3-38. TIME/DIV.
3-39. Main and delayed TIMEIDIV switches
determine the amount of time to sweep horizontally
one graticule division. Both switches are concentric
and interlocked
so
the delayed sweep
is
always
faster than the main sweep, Mairi sweep speeds are
selectable by main TIME/DIV in 23 ranges from 0.1
usecldiv to 2 sec/div. Twenty ranges of delayed
sweep speeds from 0.1 usec/div to 0.2 sec/div are
provided by delayed TIME/DIV. By using the
SWP
MAG switch, a display can be expanded 10
times, increasing the fastest sweep to 10 ns/div.
3-40. VERNIER.
3-41.
Sweep speeds are calibrated to the TIME/DIV
switch when both the main and delayed VERNIER
controls are set fully clockwise to the CAL detent
position. As the VERNIER controls are turned
counterclockwise, the VERNIER UNCAL indicator
lights and sweep speeds decrease. The main VER-
NIER control extends the slowest sweep to
5
sec/div. The vernier controls are useful for making
at
least
continuous adjustments of sweep speed, however,
TIME/DIV readings are uncalibrated.
3-42. TRIGGER LEVEL.
3-30. EXT
3-31.
HORIZ
INPUT.
In this mode, the CRT horizontal plates are
driven by an external source.
3-32. MAIN SWEEP.
3-33. In this mode, the main sweep sets a time
base reference €or the vertical signal. Main sweep
controls are mounted on the right side of the front
panel, and sweep speed
is
selected by main TIME/
DIV. If delayed TIME/DIV is set to OFF, sweep
intensity is uniform. However, any other setting
of delayed ’I’IME/DIV causes the sweep to intensify
during the time that the delayed sweep is generated.
This
feature makes it possible to select a point of
interest on the main sweep time base before viewing
in the delayed sweep mode.
3-34. MIXED SWEEP.
3-35. In this mode, the first portion of signal
referenced to the main time base and the expanded
portion is referenced to the delayed time base.
Turning the
DELAY
TIME control varies the amount
of display controlled by the delayed time base.
is
3-43. These controls select the point on the sync
signal that starts the sweep. Triggering point is
adjustable
INT position.
at
any level on the displayed signal in
In the EXT position, the triggering
point is adjustable from +1.2V to -1.2V along the
sync signal. Delayed TRIGGER LEVEL has no
function when AUTO/TRIG
3-44. TRIGGER HOLDOFF.
3-45. This adjustment
is
set to AUTO.
is
a
dual purpose control.
When the control is rotated out of detent position,
the first portion of the control acts
frequency stability control.
gering on
is
rotated further out of detent position,
as
a
high
frequency waveforms.
trigger holdoff and allows the instrument
This
prevents double
as
As
the control
it
functions
a
high
trig-
to
synchronize on complex waveforms.
3-46. SLOPE.
3-47. These switches determine whether the sweep
triggers on the positivegoing
(-1
portion of the sync signal. When the AUTO/
(+)
or negative-going
TRIG is set to AUTO, the delayed slope control
has no function.
3
-4
Model 1707B Operation
17070-R-11
Figure 3-2. Sweep Combinations
3-48.
SWEEP MODE.
The HF REJ switch attenuates signals above approximately 30 kHz and can be used to prevent high
3-49. This group of switches selects the type of main
frequency noise from triggering the sweep.
and delayed sweep triggering. Main sweep free runs
in AUTO, giving a bright base line in the absence
of
a
sync signal. However, if a sync signal of 40 Hz
or greater
and triggers the sweep. Due to the presence of
is
applied, it overrides free-run operation
a
base line, the auto sweep mode can be used for most
applications. Use NORM if the sync signal is erratic
or is less than 40 Hz. The sync input signal is always
i
needed in NORM to generate a sweep. When the
SINGLE pushbutton is engaged, the sweep
is
3-54. MAGNETIC INTERFERENCE.
3-55. The CRT is provided with a mu-metal shield
for protection against magnetic fields. Due to the
sensitivity
netic fields from nearby motors, ac line transformers,
etc., may still result in noticeable beam deflection.
In this event, reorient or relocate the instrument with
respect to the interfering device.
of
the CRT,
it
is possible that strong mag-
generated only once. To sweep again, push RESET
pushbutton and release. This arms the sweep circuit.
3-56. BATTERY RECHARGE OPERATION.
This feature is particularly useful for viewing or
photographing single transient waveforms.
3-50. When AUTOA'RIG is set to AUTO, the delayed sweep
When AUTO/TRIG
starts
at
the end of the delay time.
is
set to TRIG, the delayed sweep
is started by the first sync signal after the delay time.
Use only the HP Model 10103B Battery
Pack with the Model 1707B.
To recharge Model 10103B Battery Pack, pro-
3-57.
NOTE
ceed as follows:
3-51.
TRIGGER SELECTION.
a. Set front panel POWER switch to off.
3-52. Main and delayed trigger source
by this group of switches. In the INT position, sweep
is synchronized to the vertical deflection signal.
When EXT is selected, the sweep
is
signals applied to the EXT TRIG INPUTS connector.
is
selected
triggered by sync
b. Set rear panel POWER MODE switch to AC
LINE.
Connect ac power to the instrument. This
c.
sends 400 milliamperes of charge current to the battery. Recharge time is approximately 14 hours. (With
3-53. The trigger coupling switches determine the
type of main and delayed sync coupling. Direct
coupling (DC)
dc to less than
is
normally used for sync signals from
20
Hz. Capacitive coupling (AC) blocks
the ac POWER switch set to ON, a trickle charge
of
approximately
40
mA is applied to the battery.)
3-58. PREOPERATIONAL ADJUSTMENTS.
the dc component of a sync signal and passes only
the ac component. AC coupling does, however,
tenuate signals below
tenuates signals below approximately
)
used, for example, to prevent power line or other
20
Hz. The LF REJ switch
15
kHz and is
atat-
3-59.
INITIAL TURN-ON.
3-60.
To
place the Model 1707B into operation, per-
form the following steps:
low frequency signals from triggering the sweep. The
delayed trigger circuits do not have
a
LF
REJ switch.
Set INTENSITY to full counterclockwise.
a.
3-5
Operation
b. Set vertical POSITION A and B to midrange.
Set DISPLAY to desired mode of operation.
c.
d. Set VOLTS/DIV to 5V
Set channel A and B verniers to CAL detent.
e.
Place B POLARITY to NORM.
f.
Set vertical coupling channel A and B to
g.
GND.
Set HORIZONTAL POSITION to midrange.
h.
Set main TIME/DIV to 1 mSEC.
i.
Set delayed TIME/DIV to OFF.
j.
k.
Set main and delayed VERNIER to CAL
detent.
Set main AUTO/NORM to AUTO.
1.
Set main INT/EXT to INT
m.
Set sweep display to MAIN sweep.
n.
Verify
MODE
0.
Apply operating power and allow 15 minutes
warm i'up time.
Set INTENSITY
p.
Connect signal(s) and proceed with meas-
q.
urements.
3-61.
FOCUS
To adjust FOCUS and ASTIGMATISM pro-
3-62.
ceed as follows:
a. Set all pushbuttons out.
b. Set Model 1707B channel A controls as
follows:
proper position of POWER
switch located on rear panel.
so
that trace
AND ASTIGMATISM ADJUST.
is
just visible.
Model 1707B
0
3-63.
3-64. Figure 3-5 through 3-7 are operating plates
containing step-by-step operating procedures indexed
to photographs.
PE RAT1
N
G
PRO C
E
D
U
RES.
3-65. OPERATORS PERFORMANCE
CHECK.
3-66. The operation of the Model 1707B may be
checked without use of additional test equipment by
using the CAL 1 VOLT output
These operating tests will functionally check each of
the display modes and the front-panel controls. To
check specifications listed in table
V for performance checks. The operation check must
be performed in the sequence given. Do not attempt
to
start a procedure in mid-sequence,
steps depend on control settings and results of previous steps. If any of the results are unobtainable,
refer to Section V, Performance Checks and Adjustment Procedure, or Section VIII, Schematics and
Troubleshooting.
Set Model 1707B controls as follows:
a.
channel A VOLTS/I)IV
channel A coupling
channel A vernier..
DISPLAY.
trig..
B POLARITY..
main VERNIER
delayed VERNIER.
sweep display.
main TIMWDIV.
delayed TIME/DI
DELAY TIME
AUTO/NORM
main INTiEXT
delayed INT/EXT..
delayed slope
........
.....................
...................
...
............
...................
......................
......................
.........................
main TRIGGER LEVEL
TRIGGER HOLDOFF
SWP
MAG
.......................
as
a
signal source.
1-1,
refer to Section
as
succeeding
...............
.......
.......
................
A ONLY TRIG
NORM
..............
.........
........
..............
.5 mSEC
AUTO
..................
......
for stable triggering
............
as
required
NORM
.02
A
CAL
INT
INT
+
t
VOLTS/DIV
DISPLAY..
POSITION
c. Set main TIME/DIV to
d. Turn main vernier full ccw.
e. Set INTENSITY to observe dot.
f. Adjust FOCUS and ASTIGMATISM controls
for best defined dot,
3-6
..........................
............................
..........
as
dot moves slowly across CRT.
center trace on CRT
.2
SEC.
.01
A
b. Set INTENSITY, FOCUS and POSITION con-
trols for desired display in center of screen.
C.
Connect CAL 1 VOLT output to channel A
INPUT using the
d. Adjust main TRIGGER LEVEL for stable
display. Observe approximately 5 positive-going
pulses with an amplitude of 5 div.
e. Set delayed TIME/DIV to
intensified portion of sweep.
XI0
probe.
.2
mSEC. Observe
Model 1707B Operation
‘j
Intensified portion should cover 4
to 5 divisions.
Adjust DELAY TIME until intensified portion
f.
is centered on CRT.
g. Set sweep display switch to DELAYED
SWEEP. Observe that intensified portion
to full
10
divisions.
Set sweep display switch to MAIN SWEEP.
h.
Vary DELAY TIME control. Observe that in-
i.
tensified portion moves smoothly along display.
j.
Set delayed AUTO/TRIG control to TRIG.
k.
Adjust delayed TRIGGER LEVEL for stable
intensified portion of the trace.
1.
Vary DELAY TIME control. Observe that
leading edge of intensified portion jumps from one
positive slope leading edge to next.
Set delayed TIME/DIV to OFF.
m.
\
l
n. Rotate main VERNIER counterclockwise to
stop. Observe
and eleventh graticule lines.
Disconnect calibrator signal from vertical am-
0.
plifier.
NOTE
is
15
or more pulses between first
expanded
3-69. AUTO VERSUS NORM.
3-70.
In AUTO operation, there will always be a base
line. A trigger signal of
AUTO operation and produces
40
Hz
or
higher overrides
a
stable presentation. Adjustment of main TRIGGER LEVEL may
be necessary for a stable display. If the trigger
less than 40
tion should be used. A trigger signal
Hz,
or if
it
is
unstable, NORM opera-
is
always
needed in NORM operation to generate a sweep.
3-71. AUTO VERSUS
TRIG.
3-72. Auto delayed sweep operation is achieved
when
AUTO/TRIG pushbutton
the delayed sweep to start
time
as
set by the DELAY TIME control.
3-73. AC VERSUS DC.
3-74.
Ac coupling removes the dc level of trigger
is
out. This causes
at
the end of delayed
signals operations. Use of the LF RE J control prevents
low frequency noise from triggering the sweep.
3-75. MIXED SWEEP.
3-76. In this mode, the first part of the present-
ation is displayed on a time base set by the main
TIME/DIV switch. The last part of the presentation
is displayed on a time base set by the delayed TIME/
DIV switch. The delay between the
main sweep and the start of the delayed sweep
start
of the
is
determined in part by the DELAY TIME control.
3-77. DELAYED SWEEP.
is
Set main TIME/DIV to
p.
Set main TRIGGER LEVEL to full clockwise
q.
position.
Set main AUTO/NORM to NORM.
r.
s.
Select SINGLE operation.
t. Press RESET pushbutton. Reset indicator
should go on. Observe no sweep.
Rotate main TRIGGER LEVEL to full counter-
u.
clockwise position. Observe one sweep and reset
indicator goes off after sweep.
v. Set AUTO/NORM to AUTO.
Press RESET pushbutton. Observe one sweep.
w.
3-67.
)
3-68. The following paragraphs provide additional
OPERATING INFORMATION.
information concerning the use of some specific
functions.
.1
SEC.
3-78. Signals can be displayed
at
100
ns/div with
3% accuracy. Displays can also be expanded up to
10
ns/div
(XI0
magnification) with
5%
accuracy.
This expansion permits viewing critical rise time or
signal shapes with increased resolution. The portion
to be expanded
control in main sweep operation.
is
selectable by the DELAY TIME
It
is
then expanded
to the sweep speed selected by the delayed TIME/
DIV switch after delayed sweep operation
is
selected.
Because the sweeps are independent, the main
VERNIER may be out of CAL position while the
delayed sweep is still calibrated.
3-79. Sweep jitter can be reduced by use of the
delayed operation. By using TRIG mode instead of
AUTO in delayed sweep operation, the delayed sweep
starts on a new trigger. This reduces the jitter
that has accumulated since start of the main sweep.
3-80. LINE SYNC.
3-81. Line sync
is
selected by depressing both
main HF REJ and LF REJ pushbutton. This method
of time base synchronization
is
useful when observing
waveforms that are timerelated to the line frequency.
3-7
Operation
Model 1707B
2
i,i
1.
Set DISPLAY to A.
Set channel A coupling to GND.
2.
Set trig to NORM TRIG.
3.
4.
Set sweep display to MAIN SWEEP.
5.
Set AUTO/NORM
Adjust channel A DC BAL for minumum ver-
6.
3
to
AUTO.
tical shift while rotating channel vernier
between CAL, and maximum attenuation.
attenuation.
7.
Set DISPLAY to
Repeat steps 2 through 6 for channel
8.
B.
B.
3-8
NOTE
If trace
is
not on CRT, press
BEAM FINDER and adjust DC BAL
until trace remains on screen
Figure
3-3.
DC BAL Adjust
17070-R-1A
Model 1707B Operation
17078
OSCILLOSCOPE
1
,'7
Set DISPLAY to A.
1.
2.
Connect CAL 1 VOLT output to channel A
INPUT, using the Model 10006B 1O:l probe.
Set channel A coupling to DC.
3.
4.
Set channel A VOLTS/DIV to
!
to CAL (detent).
Set main TIME/DIV to
5.
6.
Adjust channel A CAL for exactly 5 div of
.5
mSEC.
.02
and vernier
vertical deflection.
7.
Set DISPLAY to B.
8.
Repeat steps 2 through 6 for channel
B.
Figure
3-4.
CAL Adjust
3-9
Operation Model 1707B
32
1
1.
Set DISPLAY to A
2.
Connect signals
and B INPUT connectors.
Set both VOLTS/DIV and verniers to similiar
3.
settings.
4.
Set time base controls
desired display.
Set B POLARITY to NORM.
5.
The resultant display represents the algebraic
6.
sum of channel A and B signals.
DIFFERENTIAL OPERATION
Perform steps 1 through 4 of algebraic addition
A.
operation.
5;B
ALGEBRAIC ADDITION
2
+
to
be added to the channel A
3
B.
as
required to obtain
3-10
B.
C.
Figure
Set B POLARITY to INVT.
The resultant display represents the difference
between channel A and B signals.
Algebraic Addition and Differential Operation
3-5.
17078-R-3A
Model
1707B
\-rrr--
1
10
5,9
Operation
7
9
Apply signal to channel A INPUT.
1.
2.
Set main TIME/DIV
Select INT
3.
connect trigger to main EXT TRIG INPUTS.
Adjust main TRIGGER LEVEL for stable trig-
4.
gering.
5.
Set AUTO/TRIG to AUTO.
Set delayed TIME/DIV to desired sweep speed.
6.
7.
Adjust DELAY TIME
trace is over area
or
EXT as desired. If EXT is selected,
to
desired sweep speed.
so
intensified portion
of
trace to be investigated.
of
8.
Set sweep display switch to DELAYED
SWEEP. Intensified portion of main sweep is
now displayed across entire CRT.
9.
If jitter is observed
AUTO/TRIG
strument
and reduces jitter.
If EXT triggering is selected,
then trigger must be applied to delayed
EXT TRIG INPUTS.
10. Adjust delayed TRIGGER LEVEL for a stable
display.
to
to
trigger on the signal of interest
on
delayed sweep, set
TRIG. This allows the in-
NOTE
Figure
3-6.
Delayed Sweep
17076-R-4A
3-11
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