Tektronix 475 User manual

TM 11-6625-2735-14-1
TECHNICAL MANUAL
OPERATOR’S, ORGANIZATIONAL,
DIRECT SUPPORT AND GENERAL
SUPPORT MAINTENANCE MANUAL
FOR
OSCILLOSCOPE OS-261B(V)1/U
(NSN 6625-01-101-1318)
(TEKTRONIX MODEL 475 WITH OPTION 04)
This copy is a reprint which includes
pages from Change 1. current
H E A D Q U A R T E R S, D E P A R T M E N T O F T H E A R M Y
JUNE 1982

CHANGE
No. 1
TM 11-6625-2735-14-1
C 1
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC, 10 September 1984
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND
GENERAL SUPPORT MAINTENANCE MANUAL
OSCILLOSCOPE OS-261B(V)1/U
(TEKTRONIX MODEL 475 WITH OPTION 04)
(NSN 6625-01-101-1318)
AND
OSCILLOSCOPE OS-261C(V)1/U
(TEKTRONIX MODEL 475 WITH OPTION 04
AND OPTION 07)
(NSN 6625-01-119-7314)
TM 11-6625-2735-14-1, 17 June 1982, is changed as follows:
1. Title of manual is changed as shown above.
2. New or changed material is indicated by a vertical bar in the margin of the page. Added or revised illustrations are
indicated by a vertical bar in front of the figure caption.
3. Remove old pages and insert new pages as indicated below:
Remove pages
i through iv
1-0
0-1
1-9 and 1-10
1-13/(1-14 blank)
2-1 and 2-2
6-1 and 6-2
None
7-3 and 7-4
7-15, 7-16 and 7-17/(7-18 blank)
A-1/(A-2 blank)
B-1 through B-5
D-1 through D-6
4. File this change sheet in the front of the publication.
Insert pages
C, D and E/F blank)
i through iv
0-0
0-1
1-9 and 1-10
1-13/(1-14 blank)
2-1 and 2-2
6-1 and 6-2
6-2.1 through 6-2.8
7-3 and 7-4
7-15, 7-16 and 7-17/(7-18 blank)
A-1/(A-2 blank)
B-1 through B-6
D-1 through D-6

By Order of the Secretary of the Army:
Official:
JOHN A. WICKHAM JR.
General, United States Army
Chief of Staff
ROBERT M. JOYCE
Major General, United States Army
The Adjutant General
To be distributed in accordance with DA Form 12-36B requirements for 0S-261.

TM 11-6625-2735-14-1
SAFETY SUMMARY
WARNING
WARNING
WARNING
This manual contains safety information which the user must follow to ensure safe operation of this
instrument. WARNING information is intended to protect the operator; CAUTION information is
intended to protect the instrument. 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.
Warning statements precede potentially dangerous procedures throughout this manual. The instruc-
tions contained in the warnings must be followed. The following warning statements are found in this
manual:
Use a proper power source. This instrument is intended to be operated from a single-phase power
source. A suitable power source is one where both current-carrying conductors are ungrounded, since
over-current protection (fuse) is provided in both conductors. Operation from a grounded power source
is not recommended. If the fuse in the grounded conductor opens, the power-source voltage appears on
the internal primary wiring causing a possible shock hazard during troubleshooting.
Ground the instrument. This instrument has a three-wire power cord with a three-terminal polarized
plug for connection to the power source and safety-earth. The safety-earth terminal of the plug is directly
connected to the instrument frame. For electric-shock protection, insert this plug only in a mating outlet
with a safety-earth contact or otherwise connect the frame to a safety-earth system. Failure to complete
the ground system may allow the chassis of this instrument to be elevated above ground potential and
pose a shock hazard.
WARNING
Avoid live circuits. Dangerous voltages exist at several points throughout this instrument. When the
instrument is operated with the covers removed, do not touch exposed connections or components.
Some transistors have voltages present on their cases. Disconnect power before cleaning the instrument
or replacing parts.
Avoid contact with chemicals. Handle silicone grease with care. Avoid getting silicone grease in eyes.
Wash hands thoroughly after use.
WARNING
Use care when handling the crt. Protective clothing and safety glasses should be worn when handling
a crt. Avoid striking it on any object which might cause it to crack or implode. When storing a crt, place it
in a protective carton or set it facedown in a protected location on a smooth surface with a soft mat under
the faceplate to protect it from scratches.
a

TM 11-6625-2735-14-1
SAFETY SUMMARY (CONT.)
WARNING
Adequate ventilation should be provided while using TRICHLOROTRIFLUOROETHANE. Prolonged
breathing of vapor should be avoided. The solvent should not be used near heat or open flames; the
products of decomposition are toxic and irritating. Since TRICHLOROTRIFLUOROETHANE dissolves
natural oils, prolongted contact with skin should be avoided. When necessary, use gloves which the
solvent cannot penetrate. If the solvent is taken internally, consult a physician immediately.
WARNING
Compressed air shall not be used for cleaing purposes except where reduced to less than 29
pounds per square inch (psi) and then only with effective chip guarding and personnel protective
equipment. Do not use compressed air to dry parts when TRICHLOROTRIFLUOROETHANE has
been used. Compressed air is dangerous and can cause serious bodily harm if protective means
or methods are not observed to prevent chip or particle (of whatever size) from being blown into
the eyes or unbroken skin of the operator or other personnel.
CAUTION
Avoid crl phosphor damage. Crt phosphor damage can occur under adverse conditions. Avoid any
condition where an extremely bright, sharply focused spot exists on the crt.

TM 11-6625-2735-14-1
SAFETY STEPS TO FOLLOW IF SOMEONE IS THE VICTIM OF
ELECTRICAL SHOCK
DO NOT TRY TO PULL OR GRAB THE INDIVIDUAL
IF POSSIBLE, TURN OFF THE ELECTRICAL
IF YOU CANNOT TURN OFF THE ELECTRICAL POWER, PULL,
PUSH, OR LIFT THE PERSON TO SAFETY USING A WOODEN POLE
OR A ROPE OR SOME OTHER INSULATING MATERIAL
SEND FOR HELP AS SOON AS POSSIBLE
AFTER THE INJURED PERSON IS FREE OF CONTACT WITH THE
SOURCE OF ELECTRICAL SHOCK, MOVE THE PERSONA SHORT
DISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL
RESUSCITATION
Change 1 C

TM 11-6625-2735-14-1
WARNING
HIGH VOLTAGE
is used in the operation of this equipment
DEATH ON CONTACT
may result if personnel fail to observe safety precautions
Never work on electronic equipment unless there is another person nearby who is familiar with the
operation and hazards of the equipment and who is competent in administering first aid. When the
technician is aided by operators. They must be warned about dangerous areas.
Be careful not to contact high-voltage connections or 115 volt ac input connections when
installing or operating this equipment.
Whenever the nature of the operation permits, keep one hand away from the equipment to reduce
the hazard of current flowing through the body.
WARNING Do not be misled by the term “low voltage”. Potentials as low as
50 volts may cause death under adverse conditions.
For Artificial Respiration, refer to FM 21-11.
D Change 1

TM 11-6625-2735-14-1
SAFETY PRECAUTION
A periodic review of safety precautions in TB 385-4, Safety Precautions for Maintenance of
Electrical/Electronic Equipment, is recommended. When the equipment is operated with covers
removed, DO NOT TOUCH exposed connections or components. MAKE CERTAIN you are not
grounded when making connections or adjusting components inside the test instrument.
Change 1 E/(F blank)

This manual contains copyright material reproduced by permission of Tektronix, Inc.
TM 11-6625-2735-14-1
T ECHNICAL M ANUAL
HEADQUARTERS
DEPARTMENT OF THE ARMY
No. 11-6625-2735-14-1 Washington, DC, 17 June 1982
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND
GENERAL SUPPORT MAINTENANCE MANUAL
OSCILLOSCOPE OS-261B(V)1/U
(TEKTRONIX MODEL 475 WITH OPTION 04)
(NSN 6625-01-101-1318)
AND
OSCILLOSCOPE OS-261C(V)1/U
(TEKTRONIX MODEL 475 WITH OPTION 04
AND OPTION 07)
(NSN 6625-01-119-7314)
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this manual. If you find any mistakes or if you know of a way to improve
the procedures, please let us know. Mail your letter, DA Form 2028 (Recommended Changes to
Publications and Blank Forms), or DA Form 2028-2 located in the back of this manual direct to:
Commander, US Army Communications-Electronics Command and Fort Monmouth, ATTN:
DRSEL-ME-MP, Fort Monmouth, New Jersey 07703-5007. In either case, a reply will be furnished
direct to you.
This manual is an authentication of the manufacturer’s commercial literature which, through usage, has been found
to cover the data required to operate and maintain this equipment. Since the manual was not prepared in accordance
with military specifications, the format has not been structured to consider levels of maintenance.
Change 1 i

TM 11-6625-2735-14-1
TABLE OF CONTENTS
Page
SECTION 0
SECTION 1
2
3
4
INTRODUCTION
GENERAL INFORMATION AND
INSTALLATION
Introduction
Characteristics
Installation
OPERATING INFORMATION
PRELIMINARY INSTRUCTIONS
Introduction
Safety Information
Operating Power Sources
Line Voltage and Regulating Range
Options
CONTROLS AND CONNECTORS
General
Cathode-Ray Tube (CRT) and Display
Vertical Deflection System (Channel 18
Channel 2)
A and B Triggering
A and B Sweep
Calibrator and Power
Rear Panel
OBTAINING BASIC DISPLAYS
Introduction
Normal Sweep Display
Magnified Sweep Display
Delayed Sweep Displays
Mixed Sweep Display
X-Y Display
CIRCUIT DESCRIPTION
Introduction
Digital Logic
OUTLINE FOR CIRCUIT DESCRIPTION
BLOCK DIAGRAM
CHANNEL 1 PREAMP
CHANNEL 2 PREAMP
VERTICAL CHANNEL SWITCHING
VERTICAL OUTPUT AMPLIFIER
A TRIGGER GENERATOR
B TRIGGER GENERATOR
SWEEP AND Z-AXIS LOGIC
SWEEP GENERATORS (AND) TIMING
AND HORIZONTAL DISPLAY
SWITCHING
HORIZONTAL AMPLIFIER
LOW-VOLTAGE POWER SUPPLY
CRT CIRCUIT
CALIBRATOR
FAN MOTOR CIRCUIT
MAINTENANCE
Maintenance Section Outline
ii Change 1
4 MAINTENANCE (cont)
Page
0-1
CABINET AND RACK ADAPTER REMOVAL
2-1
2-1
2-1
2-1
2-2
2-2
2-2
2-2
2-5
2-6
2-7
2-8
2-6
2-6
2-9
2-9
2-9
2-9
3-1
3-1
3-1
3-2
3-4
3-6
3-7
3-9
3-10
3-12
3-12
3-16
3-20
3-21
3-24
3-27
3-27
4-1
Standard Cabinet Removal
Standard Cabinet Installation
- Rack Adapter Removal
1-1
Rack Adapter Installation
1-1
PREVENTIVE MAINTENANCE
1-13
Introduction
Cleaning
Visual Inspection
Lubrication
Semiconductor Checks
Recalibration
TROUBLESHOOTING
Introduction
Troubleshooting Aids
Troubleshooting Equipment
Troubleshooting Techniques
Special Troubleshooting Information
CORRECTIVE MAINTENANCE
Introduction
Obtaining Replacement Parts
Soldering Techniques
Small Component Replacement
Circuit Board Replacement
Power Transformer Removal
Cathode-Ray Tube Removal
Cathode-Ray Tube Installation
High-Voltage Multiplier Removal
Delay Line Removal
Recalibration After Repair
Instrument Repackaging
5 PERFORMANCE CHECK
Introduction
Using This Procedure
TEST EQUIPMENT REQUIRED
General
Special Calibration Fixtures
Performance Check Equipment
Alternatives
OUTLINE FOR PERFORMANCE CHECK
PRELIMINARY PROCEDURE FOR
PERFORMANCE CHECK
Operating Voltage
Power Source
Warm Up
Operating Temperature
DISPLAY AND VERTICAL SYSTEM
CHECK
TRIGGER SYSTEM CHECK
HORIZONTAL SYSTEM CHECK
GATE OUTPUTS, EXTERNAL Z-AXIS
AND CALIBRATOR CHECKS
4-2
4-3
4-3
4-4
4-4
4-4
4-6
4-6
4-6
44
4-6
4-6
4-7
4-10
4-14
4-18
4-19
4-19
4-20
4-22
4-29
4-30
4-31
4-31
4-32
4-32
4-32
5-1
5-1
5-1
5-1
5-1
5-3
5-4
5-4
5-4
5-4
5-4
5-5
5-9
5-15
5-19
6 SCHEMATIC DIAGRAMS &
6-1
OPTIONS 04 AND 07
7 REPLACEABLE MECHANICAL PARTS 7-1

TM 11-6625-2735-14-1
TABLE OF CONTENTS (CONT.)
APPENDIX A REFERENCES
B COMPONENTS OF END ITEM LIST
Section I.
INTRODUCTION
SCOPE
GENERAL
EXPLANATION OF COLUMNS
Il. INTEGRAL COMPONENTS OF END ITEM
Ill. BASIC ISSUE ITEMS
APPENDIX C ADDITIONAL AUTHORIZATION LIST
D
Section I.
Fig.
No.
1-1
1-2
2-1
2-2
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
4-1
4-2
4-3
4-4
(Not Applicable)
MAINTENANCE ALLOCATION
INTRODUCTION
General
Maintenance Function
Page
B-1
B-1
B-1
Section Il.
B-1
Ill.
B-5
B-8
IV.
APPENDIX E
D-1
D-1
Section I.
Il.
Column Entries
Tool and Test Equipment Requirement
Remarks
MAINTENANCE ALLOCATION CHART
TOOL AND TEST EQUIPMENT
REQUIREMENTS FOR OSCILLOSCOPE
OS-261B(V)1/U
REMARKS
EXPENDABLE SUPPLIES AND
MATERIALS LIST
INTRODUCTION
Scope
Explanation of Columns
EXPENDABLE SUPPLIES AND
MATERIALS
LIST OF ILLUSTRATIONS
Oscilloscope OS-261B(V)1/U and OS-261C(V)1/U
Delay Time and Differential Time Measurement
Accuracy (Detailed)
Regulating Range Selector and Line Fuse.
Front panel and rear panel controls and connectors.
Basic block diagram of the 475.
Detailed block diagram of the Channel 1 Vertical
Preamplifier circuit.
Detailed block diagram of the Channel 2 Vertical
Preamplifier circuit.
Detailed block diagram of the Vertical Channel
Switching circuit
Detailed block diagram of the A Trigger Generator
circuit.
Detailed block diagram of the Sweep and Z-Axis
Logic circuits.
Detailed block diagram of the Sweep Generator
circuits.
Detailed block diagram of the Horizontal Amplifier
circuit
Detailed block diagram of the Power Supply circuit
Detailed block diagram of the CRT circuit.
Detailed block diagram of the Calibrator circuit.
Removing the standard cabinet.
Color codes for resistors and capacitors.
Lead configurations of semiconductors used in this
instrument.
Troubleshooting chart for the 475 Oscilloscope.
Page
No.
0-0
1-7
2-2
2-3
3-3
3-5
3-7
3-8
3-10
3-13
3-17
3-20
3-22
3-25
3-27
4-2
4-8
4-9
4-12
Fig.
No.
4-5
4-6
6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
7-1
7-2
7-3
7-4
7-5
7-6
7-7
7-8
7-9
B-1
Locations of circuit boards in the 475
Oscilloscope.
Locations of power transformer secondary
wires.
Option 04 Schematic Diagram
Option 07 Simplified Block Diagram
Option 07 DC Inverter
Option 07 Primary Winding
Typical Battery Pack Discharge Curves
Circuit Board Layout with Test Voltages
Typical Idealized Waveforms
Inverter Balance
Option 07 Exploded View
A1 and A2 Boards Component Locations
A3 Board Component Locations
A4 Board Component Locations
A5 Board Component Locations
A6 Board Component Locations
A7 Board Component Locations
A8 Board Component Locations
A9 Board Component Locations
Cabinet Exploded View
Oscilloscope OS-261B(V)1/U and
OS-261C(V)1/U
Page
D-2
D-2
D-2
D-5
D-7
E-1
E-1
E-2
Page
No.
4-23
4-29
6-2
6-2.2
6-2.3
6-2.4
6-2.5
6-2.6
6.2.6
6.2.7
6.2.8
7-2
7-3
7-5
7-6
7-7
7-8
7-9
7-12
7-40
B-1
Change 1 iii

TM 11-6625-2735-14-1
Fig.
No.
FO-1
FO-2
FO-3
FO-4
FO-5
FO-6
FO-7
FO-8
FO-9
Table
No.
1-1
1-2
1-3
2-1
3-1
3-2
4-1
4-2
LIST OF ILLUSTRATIONS (CONT.)
Page
No.
Page
Block Diagram Located
back of
Manual
Located
back of
Manual
Channel 1 Vertical Preamplifier Schematic
Diagram
Channel 2 Vertical Preamplifier Schematic
Diagram
Vertical Channel Switching Schematic
Diagram
Vertical Output Amplifier Schematic Diagram
A Trigger Generator Schematic Diagram
B Trigger Generator Schematic Diagram
Sweep and Z-Axis Logic Schematic Diagram
Sweep Generators Schematic Diagram
Page
No.
ELECTRICAL
ENVIRONMENTAL
PHYSICAL
Regulating Ranges
Input/Output Logic for U370
Page
No.
1-2
1-11
1-12
2-1
3-8
Horizontal Display Sweep Generator Terminology 3-16
Circuit Number-to-Diagram Locator 4-7
Power Supply Tolerance and Ripple 4-15
iv Change 1
Fig.
No.
FO-10
FO-11
FO-12
FO-13
FO-14
FO-15
FO-16
FO-17
Timing and Horizontal Display Switching
Schematic Diagram
Horizontal Amplifier Schematic Diagram
Low Voltage Power Supply Schematic
Diagram
CRT Circuit and Z-Axis Amplifier Schematic
Calibrator and Fan Circuit Schematic
Diagram
Front Panel and Chassis Exploded View
Right Side Exploded View
Left Side and Bottom Exploded View
LIST OF TABLES
Table
No.
4-3
4-4
4-5
5-1
5-2
5-3
5-4
No.
Power Supply Resistance Check 4-15
Fuse Rating, Location and Functions 4-22
Calibration Interaction After Repair or Adjustment 4-33
Test Equipment Required for Performance Check 5-2
Vertical Deflection Accuracy 5-7
Differential Delay Time Accuracy 5-17
Delay Time Settings 5-18

I
TM 11-6625-2735-14-1
Fig. 1-1. Oscilloscope OS-261B(V)1/U and OS-261C(V)1/U.
Fig. 1-1.1. Oscilloscope, OS-261B and OS-261C(V)1/U, Power Supply -1106 Battery Pack.
0-0

TM 11-6625-2735-14-1
SECTION 0
INTRODUCTION
Scope
This manual describes Oscilloscope OS-261B(V)1/U
and OS-261C(V)1/U and provides instructions for opera-
tion and maintenance. Throughout this manual, the
OS-261B(V)1/U is referred to as Tektronix Model 475 with
option 04, and the OS-261C(V)1/U is referred to as Tek-
tronix Model 475 with option 07.
Consolidated Index of Army Publications and Blank
Forms
Refer to the latest issue of DA Pam 310-1 to determine
whether there are new additions, changes, or additional
publications pertaining to the equipment.
Maintenance Forms, Records, l nd Reports
a. Reports of Malntenance and Unsatisfactory
Equipment. Department of the Army forms and pro-
cedures used for equipment maintenance will be those
prescribed by DA Pam 738-750 as contained in
Maintenance Management Update.
b. Report of Packaging and Handling Deficiencies.
Fill out and forward SF 364 (Report of Discrepancy
(ROD)) as prescribed in AR 735-11-2/DLAR
4140.55/NAVMATlNST 4355.73A/AFR 400-54/MCO
4430.3F.
c. Discrepancy in Shipment Report (DISREP) (SF
361). Fill out and forward Discrepancy in Shipment
Report (DISREP) (SF 361) as prescribed in AR
55-38/NAVSUPlNST 4610.33C/AFR 75-18/MCO
P4610.19D/DLAR 4500.15.
Reporting Equipment Improvement Recommendations
(EIR)
If your OS-261B(V)1/U and OS-261C(V)1/U needs
improvement, let us know. Send us an EIR. You, the
user, are the only one who can tell us what you don’t
like about your equipment. Let us know why you don’t
like the design. Put it on an SF 368 (Quality Deficiency
Report). Mail it to Commander, US Army
Communications-Electronics Command and Fort
Monmouth, ATTN: DRSEL-ME-MP, Fort Monmouth, New
Jersey 07703-5007. We’ll send you a reply.
Administrative Storage
To prepare the equipment for administrative storage,
ascertain its operability and reliability. In addition, use the
proper packing materials.
Destruction of Army Electronics Materiel
Destruction of Army electronics materiel to prevent
enemy use shall be in accordance with TM 750-244-2.
Change 1 0-1

TM 11-6625-2795-14-1
Section 1—475 Service
GENERAL INFORMATION
AND INSTALLATION
Introduction
The 475 Oscilloscope is a 200 megahertz bandwidth
portable instrument designed to operate in a wide range of
environmental conditions. The lightweight, compact
design combines accurate high-frequency measurement
capability and ease of transportation.
The dual-channel, DC-to-200 megahertz vertical
deflection system provides calibrated deflection factors
from 2 millivolts to 5 volts/division. A BW/TRIG VIEW
switch permits limiting the bandwidth of the vertical
system to reduce interference from high-frequency
signals when viewing lower-frequency, low-level signals.
The switch also permits displaying of the signal applied to
the ‘A’ Trigger Generator on the CRT.
sweep to trigger in a stable manner on aperiodic signals or
complex digital words. The horizontal deflection system
has calibrated sweep rates from 0.5 second to 0.01
microsecond/division. A X10 magnifier increases each
sweep rate by a factor of 10 to provide a maximum sweep
rate of one nanosecond per division in the .01 position.
The delayed and mixed sweep features allow the start of B
sweep to be delayed a selected amount from the start of A
sweep to provide accurate relative-time measurements.
Calibrated X-Y measurements can be made with Channel
2 providing the vertical deflection and Channel 1 providing
the horizontal deflection (TIME/DIV switch fully
counterclockwise and VERT MODE switch to CH 2).
Regulated DC power supplies provide stable instrument
performance over a wide range of line voltages and
frequencies. Maximum power consumption of the instru-
ment is approximately 100 watts.
Characteristics
The trigger circuits provide stable sweep triggering to The following instrument specifications apply over an
beyond the 200 megahertz bandwidth of the vertical ambient temperature range of –15°C to +55°C unless
deflection system. Separate controls are provided to otherwise specified. Warmup time for specified ac-
select the desired mode of triggering for the A and B curacies is 20 minutes. The calibration procedure given in
sweeps. The A sweep can be operated in one of three Section 6, if performed completely, will ensure the instru-
modes; automatic triggering, normal triggering, or single ment meets the electrical characteristics listed in this
sweep. A variable trigger holdoff control permits the A section.
1-1

TM 11-6625-2735-14-1
TABLE 1-1
ELECTRICAL
Characteristics
Performance Requirements Supplemental Information
VERTICAL DEFLECTION SYSTEM (CH 1 and CH 2)
Deflection Factor Calibrated 2 mV to 5 V/DIV in 11 steps; 1-2-5
Range
sequence.
Cascaded Operation (CH 2 VERT Deflection Factor to Approximately
SIGNAL OUT Connected to CH 1) 400 div. Bandwidth: DC to
50 MHz.
Uncalibrated (VAR VOLTS/DIV)
Provides continuously variable de-
Range
flection factors between the cali-
brated steps. Extends maximum un-
calibrated deflection factor to at
least 12.5 volts per division in
the 5 V/DIV position.
CH 2 VERT SIGNAL OUT into CH 1
input. DC coupled using a 50 42”
RG58A/U cable terminated in 50 at CH
1 input.
At least 2.51
Low Frequency Linearity
Wlthln 3% of indicated deflection.
Deflection Factor Accuracy
Bandwidth
–15° C to +40°C
DC to 200 MHz.
+40°C to +55°C
DC to 175 MHz.
Risetime
–15°C to +40°C 1.75 ns or less (Calculated)1.
+40°C to +55°C 2.0 ns or less (Calculated)1.
AC Coupled Lower 3 dB point 10 Hz or less with 1X probe
Bandwidth with 100 or 20 MHz Approximately 20 MHz
BW Switch in 20 MHz Position
Bandwidth with 100 or 20 MHz Approximately 100 MHz
BW Switch in 100 MHz Position
Input Resistance and Capaci- 1 M within 2% paralleled by ap-
tance
proximately 20 PF
0.1 division or less compression or
expansion of 2 division signal at center
screen positioned to the upper and
lower extremes of the graticule area.
With GAIN set at 5 mV/DIV.
CH 1 and CH 2 at all deflection
factors, from a 50 terminated
source.
1 Hz or less with 10X probe.
–3 dB point between 15 MHz
and 20 MHz.
3 dB point between 75 MHz
and 125 MHz.
1
Risetime is calculated from the formula:
0.35
BW (in megahertz)
1-2