Tektronix 1755A, 1745A, 1741A, 1751A, 1750A User Manual

User Manual

1740A/1750A Series
Waveform/Vector Monitor

070-8470-06

This document supports firmware version 2.2 and
above.

www.tektronix.com

Copyright © Tektronix, Inc. All rights reserved.

Tektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.

Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY

Tektronix warrants that the products that it manufactures and sells will be free from defects
in materials and workmanship for a period of three (3) years from the date of shipment. If a
product proves defective during this warranty period, Tektronix, at its option, either will
repair the defective product without charge for parts and labor, or will provide a
replacement in exchange for the defective product.

In order to obtain service under this warranty, Customer must notify Tektronix of the
defect before the expiration of the warranty period and make suitable arrangements for the
performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by Tektronix, with shipping charges
prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to
a location within the country in which the Tektronix service center is located. Customer
shall be responsible for paying all shipping charges, duties, taxes, and any other charges for
products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or
improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish
service under this warranty a) to repair damage resulting from attempts by personnel other
than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a
product that has been modified or integrated with other products when the effect of such
modification or integration increases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS
DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY
TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF
THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR
HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

General Safety Summary

Review the following safety precautions to avoid injury and
prevent damage to this product or any products connected to
it. To avoid potential hazards, use this product only as
specified.

Only qualified personnel should perform service procedures.

To Avoid Fire or Personal Injury

Use Proper Power Cord

Use only the power cord specified for this product and
certified for the country of use.

Connect and Disconnect Properly

Do not connect or disconnect probes or test leads while they
are connected to a voltage source.

Ground the Product

This product is grounded through the grounding conductor of
the power cord. To avoid electric shock, the grounding
conductor must be connected to earth ground. Before making
connections to the input or output terminals of the product,
ensure that the product is properly grounded.

Observe All Terminal Ratings

To avoid fire or shock hazard, observe all ratings and mark­ings on the product. Consult the product manual for further
ratings information before making connections to the prod­uct.

1740A/1750A Series Waveform/Vector Monitor User Manual

i

General Safety Summary

The common terminal is at ground potential. Do not connect
the common terminal to elevated voltages.

Do Not Operate Without Covers. Do not operate this

product with covers or panels removed.

Use Proper Fuse. Use only the fuse type and rating speci-

fied for this product.

Avoid Exposed Circuitry. Do not touch e xposed connec-

tions and components when power is present.

Do Not Operate With Suspected Failures. If you suspect

there is damage to this product, have it inspected by qualified
service personnel.

Do Not Operate in Wet/Damp Conditions.

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

Provide Proper Ventilation.

tion instructions for details on installing the product so it has
proper ventilation.

Safety Terms and Symbols

Terms in This Manual. These terms may appear in this

manual:

WARNING. Warning statements identify conditions or practices
that could result in injury or loss of life.

Refer to the manual’s installa-

ii

1740A/1750A Series Waveform/Vector Monitor User Manual

General Safety Summary

CAUTION. Caution statements identify conditions or practices
that could result in damage to this product or other property.

Terms on the Product. These terms may appear on the

product:

DANGER indicates an injury hazard immediately accessible
as you read the marking.

WARNING indicates an injury hazard not immediately
accessible as you read the marking.

CAUTION indicates a hazard to property including the
product.

Symbols on the Product. These symbols may appear on

the product:

CAUTION

Refer to

Manual

Not suitable for

connection to

the public tele-

communica-

tions network

WARNING

High Volt-

age

Double

Insu­lated

Protective

Ground (Earth)

Te r mi nal

1740A/1750A Series Waveform/Vector Monitor User Manual

iii

General Safety Summary

iv

1740A/1750A Series Waveform/Vector Monitor User Manual

TABLE OF CONTENTS

Introduction

Product Description 1-1.............................

Features 1-2.................................

Options 1-5........................................

Power Cord Options 1-5.......................

CRT Options 1-6.............................

Accessories 1-7....................................

Standard Accessories 1-7.....................

Optional Accessories 1-7......................

Field Upgrade Kits 1-8........................

Installation 1-9.....................................

Repackaging for Shipment 1-9..............

Electrical Installation 1-10.......................

Mains Frequency and Voltage Range 1-11.....

Remote Connector 1-11.....................

RS232 Connector 1-11.......................

Mechanical Installation 1-12....................

Cabinets 1-12..............................

Custom Installation 1-12.....................

Rackmounting 1-13.........................

Instrument Configuration 1-15........................

At A Glance 2-1.....................................

Front-Panel Controls 2-1......................

Rear-Panel Connectors 2-8....................

Operator’s Checkout Procedure 2-12..................

Required Equipment 2-12....................

Initial Equipment Connections 2-12............

Procedure 2-13...............................

Operation Basics

Functional Overview 3-1.............................

1740A/1750A Series Waveform/Vector Monitor User Manual

v

Table of Contents

Using the Menus 3-5................................

Display Modes 3-1............................

Vector 3-1.................................

Waveform 3-1.............................

Audio 3-2.................................

SCH 3-2..................................

Picture 3-2................................

Time Code 3-3.............................

Multiple 3-3...............................

Displaying a Signal 3-3........................

Inputs 3-3.................................

General Menu Information 3-5.................

Multi-Use Bezel Controls and Buttons 3-5.....

Moving Between Menus 3-5.................

Clear Menu 3-6............................

Exiting a Menu Function 3-6.................

Filter Menu 3-7...............................

Cursor Menu 3-8.............................

Waveform Cursor Control 3-9................

Vector + Waveform (Multiple) 3-11............

Using the Cursors 3-11.........................

Line Select Menu 3-14.........................

Preset Menu 3-16.............................

Configure Menu 3-18..........................

INPUT 3-18.................................

VECTOR 3 -18..............................

FORMAT 3-19..............................

STANDARD 3-20............................

OFFSET 3-21...............................

CALIBRATE 3-21............................

REMOTE 3-23..............................

REFERENCE (Dual Standard Only) 3-23.......

vi

Gain Menu 3-24...............................

CRT Menu 3-24...............................

Remote Operation 3-25...............................

Using Presets through the Remote 3-25.......

1740A/1750A Series Waveform/Vector Monitor User Manual

Making Measurements

Basic Measurements 4-1............................

Waveform Graticule 4-1.......................

Horizontal Scale 4-1........................

NTSC Vertical Scales 4-2....................

PAL Vertical Scale 4-3......................

Dual-Standard Vertical Scale 4-4.............

Making Waveform Measurements 4-5...........

Horizontal Sync Amplitude 4-5...............

Peak White 4-5............................

K-Factor Measurements 4-5.................

Vector Graticule 4-7...........................

Making Vector Measurements 4-9..............

Chroma Bandwidth 4-9.....................

Table of Contents

Differential Phase and Gain 4-9..............

Making SC/H Phase Measurements 4-10........

NTSC 4-10.................................

PAL 4-1 2...................................

S C /H R --- Y 4 - 12.............................

Making Audio Measurements 4-15...............

Time Code Display 4-16........................

Calibration 4-17.....................................

Adjusting Instrument Gain 4-17.................

1740A/1750A Series Waveform/Vector Monitor User Manual

vii

Table of Contents

Appendices

Appendix A

Performance Specifications A-1......................

Appendix B

Remote Connectors B-1.............................

Appendix C

User Service C-1....................................

Reliability A-1..............................

Electrical Specifications A-2.................

Certifications and compliances A-13...........

Remote Connector Converter B-4...............

Cleaning or Replacing the Fan Filter C-1.........

Fuse Replacement C-1........................

Graticule Light Replacement C-2...............

Cleaning C-4.................................

Replacing the CRT Filter C-5...................

Appendix D

Software Version D-1................................

Glossary G-1.......................................

Index I-1...........................................

viii

1740A/1750A Series Waveform/Vector Monitor User Manual

LIST OF FIGURES

Figure 2-1. Multi-Use Bezel Controls and Buttons. 2-2........

Figure 2-2. 1740A Front Panel. 2-3......................

Figure 2-3. 1750A Front Panel. 2-4......................

Figure 2-4. 1740A/ 1750A--Series Rear Panel. 2-10...........

Figure 2-5. Equipment hook-up for Operator’s Checkout

Procedure. 2-12............................

Figure 2-6. Calibrator display. 2-14.......................

Figure 2-7. Two-Line LUM filter display of color bar signal. 2-17..
Figure 2-8. Two-Line CHROM filter display of color bar signal. 2-17

Figure 2-9. Two-Line DIFF filter display. 2-18................

Figure 2-10. Two-Line R--Y display of color bar signal. 2-19......

Figure 2-11. SC/H R--Y display (NTSC). 2-19................

Figure 2-12. SC/H R--Y display (PAL). 2-20..................

Figure 2-13. Line Select display in 2 FIELD sweep. 2-21........

Figure 2-14. Vectorscope color bar display. 2-22..............

Figure 2-15. Picture mode display of color bar signal. 2-22.......

Figure 2-16. Audio display with phase error. 2-23..............

Figure 2-17. NTSC SC/H display. 2-24.....................

Figure 2-18. PAL SC/H display. 2-24.......................

Table of Contents

Figure 3-1. The CRT menu. 3-6........................

Figure 3-2. The VECTOR CURSOR menu. 3-8.............

Figure 3-3. The WAVEFORM CURSOR menu. 3-10...........

Figure 3-4. The VECTOR+WFM CURSOR menu. 3-10........

Figure 3-5. The PRESET menu display. 3-16................

Figure 3-6. The CONFIGURE menu display. 3-19............

Figure 4-1. NTSC waveform/vector graticule. 4-2............

Figure 4-2. PAL waveform/vector graticule. 4-3.............

Figure 4-3. Dual Standard waveform/vector graticule. 4-4......

Figure 4-4. Vector targets. 4-8.........................

Figure 4-5. Differential Gain and Phase Measurements. 4-9....

Figure 4-6. NTSC dual-dot SC/H display. 4-11...............

Figure 4-7. NTSC single-dot SC/H displ ay. 4-11..............

Figure 4-8. PAL SC/H display. 4-12.......................

Figure 4-9. Two-Line SC/H R--Y display (NTSC). 4-13.........

Figure 4-10. Two-Field SC/H R--Y display (NTSC). 4-13.........

Figure 4-11. Two-Field SC/H R--Y display (NTSC), showi ng

approximate 10° phase error. 4-14...............

1740A/1750A Series Waveform/Vector Monitor User Manual

ix

Table of Contents

Figure 4-12. Two-Field SC/H R--Y display (PAL). 4-14..........

Figure 4-13. Audio displays. 4-15.........................

Figure B-1. Rear panel REMOTE connector. B-1............

Figure B-2. REMOTE adapter. B-4.......................

Figure B-3. Rear panel RS232 connector. B-5...............

Figure C-1. Graticule light replacement. C-3................

x

1740A/1750A Series Waveform/Vector Monitor User Manual

This user manual is one of a set of two manuals that document the
Tektronix 1740A/1750A-Series Waveform/Vector monitors. To
purchase a service manual, please refer to “Contacting Tektronix” on
Page xiv for address and phone number information.

User Manual

Instrument controls and readouts appear in ALL CAPITALS.
Topics covered in the user manual are as follows:

Introduction

Getting Started

Operation Basics

Preface

Making Measurements

Appendix A

electrical and mechanical.

Appendix B describes remote control interfaces.

Appendix C covers routine service procedures, such as

replacing fuses and graticule light bulbs.

The appendixes are followed by a glossary of specialized
terms and an index.

provides instrument specifications, both

1740A/1750A Series Waveform/Vector Monitor User Manual xi

Preface

Service Manual

Topics covered in the service manual are as follows:

Specifications

Operating Information

Theory of Operation

Performance Verification

Adjustment Procedures

Maintenance

Options

Electrical Parts List

Diagrams

Mechanical Parts List

xii

1740A/1750A Series Waveform/Vector Monitor User Manual

Preface

1750A Waveform / Vector Monitor.

1740A/1750A Series Waveform/Vector Monitor User Manual

xiii

Preface

Contacting Tektronix

Phone [phone]*

Address Tektronix, Inc.

Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA

Web site www.tektronix.com

Sales
support

Service
support

Technical
support

* This phone number is toll free in North America. After office

hours, please leave a voice mail message.
Outside North America, contact a Tektronix sales office or
distributor; see the Tektronix web site for a list of offices.

1-800-833-9200, select option 1*

1-800-833-9200, select option 2*

Email: [e-mail]

1-800-833-9200, select option 3*

6:00 a.m. -- 5:00 p.m. Pacific time

xiv

1740A/1750A Series Waveform/Vector Monitor User Manual

Introduction

The 1740A/1750A--Series are combination waveform/vector
monitors in half-rack size packages. The 1740A--Series
provides all basic waveform monitor and vectorscope func­tions; the 1750A--Series provides the same functions with

SCH measurement capabilities added. The following products

are available:

Applications

Product Description

1740A / 1750A NTSC

1741A / 1751A PAL

1745A / 1755A NTSC / PAL (dual-standard)

Typical applications for these monitors include video signal
monitoring in camera control units, VTR bridges, production
switcher consoles, mobile vans and field production systems.

The 1740A--Series is well-suited for port able applications
where a small, lightweight monitor is needed, and SCH
capability is not required. It is appropriate for many VTR
bridge applications, providing remote control and 90/100 Hz
sweeps for D-2 servo observation.

The 1750A--Series is useful in the composite edit suite,
providing all 1740A--Series features, plus the Tektronix polar
SCH display to match color subcarrier-to-horizontal sync
timing and color framing among edit sources.

1740A/1750A Series Waveform/Vector Monitor User Manual 1-1

Product Description

Features

H Composite or Component Waveform Monitoring

H Composite Vector Display

H Menu-Assisted Operation allows expanded feature set.

H Assignable cursors for time and voltage.

H Picture monitor mode for verifying signal source

H Stereo Audio Display

H Longitudinal time code display mode for editing applica-

tions

H SCH and Color Framing Display (1750A--Series only)

H External staircase from a camera control unit can be

selected remotely.

H Internal video filters provide specialized measurements,

with dual or triple filter modes available in

OVERLAY.

H Eight video inputs can be individually displayed or

selected in various combinations.

H Remote interface and serial RS232 interface.

Description of Features

Menu

A notable feature of these monitors is t he m enu-assisted
operation. An expanded feature set is possible through the
use of menus and multi-use controls and buttons. When the
operator selects a menu item, such as

CURSORS

label shows the current function of the controls.

, VARIABLE G AIN,orLINE SELECT, an on-screen

PARADE or

VOLTAGE/TIMING

1-2

Many instrument configurations that required moving inter­nal jumpers or wire straps in the 1740/1750--Series monitors
are made through an on-screen menu in the 1740A/ 1750A-­Series. The operator can also recal l up to 10 front-panel
setups through the

1740A/1750A Series Waveform/Vector Monitor User Manual

RECALL menu; 9 recalls are user-program-

Product Description

mable and 1 is factory-programmed. The FILTER menu also
provides a choice of four filters in addition to flat. Two
combination filtering modes can be displayed in

PARADE. Refer to “Using the Menus” on page 3-5 for more

OVERLAY or

menu information.

CRT

The monitors have a bright, post-accelerated CRT with
lighted internal graticule. The parallax-free internal graticule
structure contains targets and markings for both the vector
and waveform functions. A white phosphorus CRT is option­al; refer to page 1-6 for details.

The bright CRT allows use in high ambient light conditions,
such as those encountered in field production applications.

Calibrator

Vertical and horizontal instrument gain can be set using the
calibrator signal. The 1 Volt calibrator signal is available in
100 kHz and F

More Information

H Standard and optional accessories are listed in the

Accessories section, which follows this product de scrip­tion.

H Instrument options are listed on page 1-5.

H A complete listing of instrument specifications begi ns on

Appendix page A-1.

(color subcarrier) rates.

SC

1740A/1750A Series Waveform/Vector Monitor User Manual

1-3

Product Description

1-4

1740A/1750A Series Waveform/Vector Monitor User Manual

White phosphor CRT and power cord options are the only
options currently available for the 1740A/1750A--Series.
Field upgrade kits listed in this section can also be used with
these monitors.

Power Cord Options

Any of the following power cord options can be ordered for
the 1740A/1750A--Series. If no power cord option is speci­fied, instruments are shipped with a North American 125 V
power cord and one replacement fuse.

Unless otherwise specified, power cords for use in North
America are UL listed and CSA certified. Cords for use in
areas other than North America are approved by at least one
test house acceptable in the country to which the product is
shipped.

Options

Option A1. Power, Universal Europe, 220 V/16 A

(Locking Power Cord)

Option A2. Power, United Kingdom, 240 V/15 A

(Power Cord)

Option A3. Power, Australia, 240 V/10 A

(Power Cord)

Option A4. Power, North America, 250V/10 A

(Power Cord)

Option A5. Power, Swiss, 240 V/6 A

(Power Cord)

1740A/1750A Series Waveform/Vector Monitor User Manual 1-5

Options

CRT Options

The standard instrument is shipped with a P31 (green)
phosphor CRT installed. If Option 74 is ordered, the instru­ment is shipped with a P4 (white) phosphor CRT installed.
The Option 74 CRT part numbers are given in the service
manual, at the end of the Replaceable Electrical Parts List.

1-6

1740A/1750A Series Waveform/Vector Monitor User Manual

Standard Accessories

These accessories are included with the product:

1 Manual, user: 1740A/1750A--Series

(070--8470--XX)

1 Cable assembly, power: United States and Japan

only (161--0216--XX)

1 Cable assembly, power: all other countries

(161--0066--XX)

1 Fuse, cartridge: 3AG, 2A, 250V, fast-blow

(159--0021--00)

4 Light bulbs: graticule scale (150--0168--00). See

page C-1 for replacement instructions.

Accessories

4 Air filters: fan (378--0335--00). See page C-1 for

replacement instructions.

This accessory is installed on the product:

1 CRT filter: smoke gray (378--0258--00)

Optional Accessories

Manual, service: 1740A/1750A/1760-- Series

(070--8469--XX)

Camera, C9 Option 20

Viewing Hood (016--0475--00)

Front-Panel Cover (200--3897--01)

1740A/1750A Series Waveform/Vector Monitor User Manual 1-7

Accessories

Field Upgrade Kits

1700F00 Plain Cabinet — This plain metal half-rack

size cabinet is painted silver-gray. Ventilating holes in top,
bottom, and sides of the cabinet allow heat generated within
the instrument to dissipate.

1700F02 Carrying Case — This portable cabinet is

similar to the 1700F00, but has feet, carrying handle, flips­tand, and front cover.

1700F05 Side-by-Side Rack Adapter — The

1700F05 allows the user to mount two half-rack width
instruments in a standard 19--inch rack.

1700F06 Blank Panel — If only one section of a

1700F05 is used, the 1700F06 Blank Panel can be inserte d in
the unused section to improve appearance and air flow.

1700F07 Utility Drawer — When only one side of a

1700F05 is used, this utility drawer can be installed in the
unused section to provide storage. The drawer opens and
closes freely, unless latched for transport.

Ordering — These items can be ordered with the monitor,

or purchased through a Tektronix field office or distributor.
When ordering, include both the name and number of the
Field Upgrade Kits.

Installation — Cabinet installation instructions begin on

page 1-12. Dimensional drawings are also shipped with each
cabinet. For more information, contact a Tektronix field
office or distributor.

1-8

1740A/1750A Series Waveform/Vector Monitor User Manual

Installation

Unpacking

Save the shipping carton and packing materials (including
anti-static bag) in case it becomes necessary to ship the
instrument to a Tektronix Service Center for service or repair.

Accessories

Check that the following accessory items are included:

H User Manual

H Service Manual

Note: The Service Manual is an optional accessory
that must be ordered to be received.

H Power Cord

H Replacement Fuse Cartridge (1)

H Replacement Graticule Light Bulbs (4)

H Replacement Air Filters for Fan (4)

Repackaging for Shipment

If it becomes necessary to ship the instrument to a Tektronix
Service Center for service or repair, follow these instructions
for repackaging:

1. Attach a tag to the instrument showing: the owner,
complete address and phone number of someone at your
firm who can be contacted, the instrument serial number
and a description of the required service.

2. Package the instrument in the original packaging materi­als. If the original packaging materials are not available,
follow these directions:

1740A/1750A Series Waveform/Vector Monitor User Manual 1-9

Installation

a. Obtain a carton of corrugated cardboard having

inside dimensions six or more inches greater than
the dimensions of the instrument. Use a shipping
carton that has a test strength of at least 275 pounds.

b. Surround the instrument with a protective bag

(anti-static preferred). For instruments which are
not in a cabinet, wrap a cardboard piece around the
bagged instrument to protect components.

c. Pack dunnage or urethane foam between the instru-

ment and the carton. If using Styrofoam kernels,
overfill the box and compress by closing the lid.
There should be three inches of tightly packed
cushioning on all sides of the instrument.

3. Seal the carton with shipping tape, industrial stapler, or
both.

Electrical Installation

Power Source

These monitors are designed to operate from a single-phase
power source having one of its current-ca rrying conductors at
or near earth ground (the neutral conductor). Only the line
conductor is fused for over-current protection. Systems that
have both current-carrying conductors live with respect to
ground (such as phase-to-phase on multiphase systems) are
not recommended as power sources. A protective ground
connection by way of the grounding conductor in the power
cord is essential for safe operation.

When power is supplied, line voltage will be
present in the instrument, even if the
is set to

STANDBY.

NOTE

POWER switch

1-10

1740A/1750A Series Waveform/Vector Monitor User Manual