Tektronix 1760 Manual

Tektronix 1760 Manual
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User Manual
1760 Series
Component Waveform/
Vector Monitor
070-8473-05
This document supports firmware version 2.2 and
above.
www.tektronix.com
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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.
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WARRANTY
Tektronix warrants that this product will be free from defects in materials and
workmanship for a period of three (3) years from the date of shipment. If any
such 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; or c) 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 WITH RESPECT TO THIS
PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED 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.
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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.
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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 specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections 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. Refer to the manual’s installation 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.
ii
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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
WARNING
High Voltage
Double
Insulated
Protective
Ground (Earth)
Terminal
Not suitable for
connection to
the public telecommunications network
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General Safety Summary
iv
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TABLE OF CONTENTS
Introduction
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
Option SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cord Options . . . . . . . . . . . . . . . . . . . . . . .
CRT Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
1-5
1-6
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-7
Standard Accessories . . . . . . . . . . . . . . . . . . . . .
Optional Accessories . . . . . . . . . . . . . . . . . . . . . .
Field Upgrade Kits . . . . . . . . . . . . . . . . . . . . . . . .
1-7
1-7
1-8
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packaging for Shipment . . . . . . . . . . . . . . . . .
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . .
Mains Frequency and Voltage Range . . . . .
Remote Connector . . . . . . . . . . . . . . . . . . . . .
RS232 Connector . . . . . . . . . . . . . . . . . . . . . . .
Mechanical Installation . . . . . . . . . . . . . . . . . . . .
Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Custom Installation . . . . . . . . . . . . . . . . . . . . .
Rackmounting . . . . . . . . . . . . . . . . . . . . . . . . .
1-9
1-9
1-10
1-11
1-11
1-11
1-12
1-12
1-12
1-13
Instrument Configuration . . . . . . . . . . . . . . . . . . . . . . .
1-15
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Table of Contents
Getting Started
At A Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
Front-Panel Controls . . . . . . . . . . . . . . . . . . . . . .
Rear-Panel Connectors . . . . . . . . . . . . . . . . . . . .
2-1
2-8
Operator’s Checkout Procedure . . . . . . . . . . . . . . . . .
Required Equipment . . . . . . . . . . . . . . . . . . . .
Initial Equipment Connections . . . . . . . . . . . .
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-11
2-11
2-12
2-13
Operation Basics
vi
Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
Display Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCH (Option SC Only) . . . . . . . . . . . . . . . . . .
Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lightning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diamond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bowtie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Picture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying a Signal . . . . . . . . . . . . . . . . . . . . . . . .
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A123 / B123 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3-1
3-2
3-2
3-2
3-3
3-3
3-4
3-4
3-4
3-4
3-5
3-5
3-5
3-5
3-6
3-6
Using the Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-7
General Menu Information . . . . . . . . . . . . . . . . .
Multi-Use Bezel Controls and Buttons . . . . .
Moving Between Menus . . . . . . . . . . . . . . . . .
Clear Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exiting a Menu Function . . . . . . . . . . . . . . . . .
3-7
3-7
3-7
3-8
3-8
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Table of Contents
Filter Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cursor Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Waveform Cursor Control . . . . . . . . . . . . . . . .
Vector + Waveform (Multiple) . . . . . . . . . . . .
Using the Cursors . . . . . . . . . . . . . . . . . . . . . . . . .
Line Select Menu . . . . . . . . . . . . . . . . . . . . . . . . .
Preset Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configure Menu . . . . . . . . . . . . . . . . . . . . . . . . . .
INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FORMAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STANDARD . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CALIBRATE . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REFERENCE (1765 Only) . . . . . . . . . . . . . . . .
Gain Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CRT Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-9
3-10
3-11
3-13
3-13
3-16
3-18
3-20
3-20
3-21
3-21
3-22
3-23
3-23
3-25
3-25
3-26
3-27
Remote Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Presets through the Remote . . . . . . .
3-29
3-29
Making Measurements
Basic Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
Waveform Graticule . . . . . . . . . . . . . . . . . . . . . . .
Horizontal Scale . . . . . . . . . . . . . . . . . . . . . . . .
NTSC Vertical Scales . . . . . . . . . . . . . . . . . . . .
PAL Vertical Scale . . . . . . . . . . . . . . . . . . . . . .
Dual-Standard Vertical Scale . . . . . . . . . . . . .
Making Waveform Measurements . . . . . . . . . . .
Horizontal Sync Amplitude . . . . . . . . . . . . . . .
Peak White . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K-Factor Measurements . . . . . . . . . . . . . . . . .
Vector Graticule . . . . . . . . . . . . . . . . . . . . . . . . . . .
Making Vector Measurements . . . . . . . . . . . . . .
4-1
4-1
4-2
4-3
4-3
4-4
4-4
4-5
4-5
4-6
4-8
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Table of Contents
Chroma Bandwidth . . . . . . . . . . . . . . . . . . . . .
Differential Phase and Gain . . . . . . . . . . . . . .
Making SCH Phase Measurements . . . . . . . . .
NTSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCH R---Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Making Audio Measurements . . . . . . . . . . . . . . .
Lightning Measurements . . . . . . . . . . . . . . . . . . .
Using the Diamond Display . . . . . . . . . . . . . . . .
Using the Bowtie Display . . . . . . . . . . . . . . . . . .
Time Code Display . . . . . . . . . . . . . . . . . . . . . . . .
4-8
4-8
4-9
4-9
4-11
4-11
4-14
4-15
4-17
4-19
4-21
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2
Adjusting Instrument Gain . . . . . . . . . . . . . . . . .
4-2
Appendices
viii
Appendix A
Performance Specifications . . . . . . . . . . . . . . . . . . . . .
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Specifications . . . . . . . . . . . . . . . . .
Certifications and compliances . . . . . . . . . . .
A-1
A-1
A-2
A-15
Appendix B
Remote Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-1
Remote Connector Converter . . . . . . . . . . . . . . .
B-4
Appendix C
User Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-1
Cleaning or Replacing the Fan Filter . . . . . . . . .
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . .
Graticule Light Replacement . . . . . . . . . . . . . . .
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the CRT Filter . . . . . . . . . . . . . . . . . . .
C-1
C-1
C-2
C-4
C-5
Appendix D
Software Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-1
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LIST OF FIGURES
Figure 2-1
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5
Figure 2-6
Figure 2-7
Figure 2-8
Figure 2-9
Figure 2-10
Figure 2-11
Figure 2-12
Figure 2-13
Figure 2-14
Figure 2-15
Figure 2-16
Figure 2-17
Figure 2-18
Figure 2-19
Figure 2-20
Figure 2-21
Figure 3-1
Figure 3-2
Figure 3-3
Figure 3-4
Figure 3-5
Figure 3-6
Multi-Use Bezel Controls and Buttons. . . . . . .
1760 Front Panel . . . . . . . . . . . . . . . . . . . . .
1760-- Series Rear Panel . . . . . . . . . . . . . . . .
Equipment hook-up for Operator’s Checkout
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . .
Component waveform display (A123) . . . . . . .
Calibrator display . . . . . . . . . . . . . . . . . . . . .
Two-Line LUM filter display of color bar signal .
Two-Line CHROM filter display of color bar
signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two-Line DIFF filter display of 5-step staircase
signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two-Line R-- Y display of color bar signal . . . . .
Two-Field SCH R-- Y display (NTSC), showing
proper SCH phase . . . . . . . . . . . . . . . . . . . .
Two-Field SCH R-- Y display (PAL), showing
proper SCH phase . . . . . . . . . . . . . . . . . . . .
Line Select display with 15H selected, in
2 FIELD sweep . . . . . . . . . . . . . . . . . . . . . . .
Vectorscope color bar display . . . . . . . . . . . . .
Picture mode display of color bar signal . . . . .
Audio display with phase error . . . . . . . . . . . .
NTSC SCH display with internal reference
selected . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAL SCH display . . . . . . . . . . . . . . . . . . . . .
Lightning Display in MII Format . . . . . . . . . . .
Diamond display, showing signal within
gamut limit . . . . . . . . . . . . . . . . . . . . . . . . . .
Bowtie display . . . . . . . . . . . . . . . . . . . . . . .
The CRT menu, showing bezel controls and
bezel buttons . . . . . . . . . . . . . . . . . . . . . . . .
The VECTOR CURSOR menu . . . . . . . . . . . .
The WAVEFORM CURSOR menu . . . . . . . . .
The VECTOR+WFM CURSOR menu with
V+T selected . . . . . . . . . . . . . . . . . . . . . . . .
The PRESET menu display . . . . . . . . . . . . . .
The CONFIGURE menu display with INPUT
selected . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1760 Series Component Waveform/Vector Monitor User Manual
2-2
2-3
2-10
.2-12
2-14
2-15
2-18
2-19
2-20
2-20
2-21
2-21
2-22
2-23
2-24
2-24
2-25
2-26
2-27
2-27
2-28
3-8
3-10
3-12
3-12
3-18
3-20
ix
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Figure 4-1
Figure 4-2
Figure 4-3
Figure 4-4
Figure 4-5
Figure 4-6
Figure 4-7
Figure 4-8
Figure 4-9
Figure 4-10
Figure 4-11
Figure 4-12
Figure 4-13
Figure 4-14
Figure 4-15
Figure 4-16
Figure 4-17
Figure B-1
Figure B-2
x
NTSC waveform/vector graticule . . . . . . . . . .
PAL waveform/vector graticule . . . . . . . . . . . .
Dual Standard waveform/vector graticule . . . .
Vector targets . . . . . . . . . . . . . . . . . . . . . . . .
Differential gain and phase measurements . . .
NTSC dual-dot SCH display . . . . . . . . . . . . .
NTSC single-dot SCH display . . . . . . . . . . . .
PAL SCH display . . . . . . . . . . . . . . . . . . . . .
Two-Line SCH R-- Y display (NTSC), with
proper SC/H phase . . . . . . . . . . . . . . . . . . . .
Two-Field SCH R-- Y display (NTSC), showing
proper SC/H phase . . . . . . . . . . . . . . . . . . . .
Two-Field SCH R-- Y display (NTSC), showing
approximate 10° phase error . . . . . . . . . . . . .
Two-Field SC/H R-- Y display (PAL), showing
proper SC/H phase . . . . . . . . . . . . . . . . . . . .
Audio displays . . . . . . . . . . . . . . . . . . . . . . .
Lightning display showing correct timing . . . . .
Lightning display showing delay . . . . . . . . . . .
Diamond display showing signal inside
gamut limits . . . . . . . . . . . . . . . . . . . . . . . . .
Bowtie display showing a sharp null . . . . . . . .
4-2
4-3
4-4
4-7
4-9
4-11
4-11
4-12
4-13
4-13
4-14
4-14
4-15
4-16
4-18
4-19
4-21
Figure B-3
Rear panel REMOTE connector . . . . . . . . . . .
Using the 1760-- Series as a 1740 / 1750-- Series
replacement . . . . . . . . . . . . . . . . . . . . . . . . .
Rear panel RS232 connector . . . . . . . . . . . . .
B-1
B-4
B-5
Figure C-1
Graticule light replacement . . . . . . . . . . . . . .
C-3
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Preface
This user manual is one of a set of two manuals that document the
Tektronix 1760-Series Component 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
Making Measurements
Appendix A provides instrument specifications, both
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.
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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
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Preface
1761 Component Waveform / Vector Monitor.
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Preface
Contacting Tektronix
Phone
1-800-833-9200*
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
1-800-833-9200, select option 1*
Service
support
1-800-833-9200, select option 2*
Technical
support
Email: [email protected]
1-800-833-9200, select option 3*
6:00 a.m. - 5:00 p.m. Pacific time
*
xiv
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.
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Introduction
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Product Description
The 1760-- Series Component Waveform/Vector monitors
display component signal channels two ways: in parade and
overlay modes and as component color vectors. A component picture monitor output is provided for display on an
RGB monitor.
The 1760-- Series monitors feature the Tektronix Lighting
display. This display indicates everything needed to adjust
setup, video gain, chroma gain, and interchannel timing for
standardized playback of component video recordings.
In addition to component monitoring, all the composite waveform and vector monitoring capabilities of the 1740A-- Series monitors are included in the 1760-- Series monitors.
The following products are available:
1760
1761
1765
NTSC
PAL
NTSC / PAL
(dual-standard)
The 1760-- Series monitors can also be ordered with an SCHphase option (see page 1-5).
Applications
Typical applications for these half-rack size monitors include
video signal monitoring in camera control units, VTR bridges,
production switcher consoles, mobile vans (“OB” vans in
Europe), and field production systems.
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Product Description
Features
H
Component and composite waveform monitoring.
H
Lightning display.
H
Composite vector display.
H
Menu-assisted operation allows more features.
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 applications.
H
SCH and color framing display (Option SC 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 PARADE or
OVERLAY.
H
Eight video inputs can be individually displayed or
selected in various combinations.
H
Nine front-panel setups can be stored for recall.
H
Universal power supply accommodates AC supplies
from 90-- 250 V, 50-- 60 Hz automatically.
Description of Features
Menu
A notable feature of these monitors is the menu-assisted operation. An expanded feature set is possible through the use
of menus and multi-use controls and buttons. When the op-
1-2
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Product Description
erator selects a menu item, such as VOLTAGE/TIMING CURSORS, VARIABLE GAIN, or LINE SELECT, an on-screen label
shows the current function of the controls.
Instrument configurations such as dc restorer speed and
clamp timing are made through an on-screen menu in the
1760-- Series. The FILTER menu also provides a choice of four
filters in addition to flat.
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 Fsc (color subcarrier) rates.
More Information
H
Standard and optional accessories are listed in the
Accessories section, which follows this product description.
H
Instrument options are listed on page 1-5.
H
A complete listing of instrument specifications begins on
Appendix page A-1.
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Product Description
1-4
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Options
Options available for the 1760-- Series include SCH phase
measurement, white phosphor CRT and power cord options.
Field upgrade kits listed in this section can also be used with
these monitors.
Option SC
The 1760-- Series can be ordered with Option SC. This provides a vector display of the subcarrier-to-horizontal-sync
phase relationship. It includes the same SCH capabilities as
the 1750A-- Series instruments.
Power Cord Options
Any of the following power cord options can be ordered for
the 1760-- 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.
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)
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Options
Option A4. Power, North America, 250V/10 A
(Power Cord)
Option A5. Power, Swiss, 240 V/6 A
(Power Cord)
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.
1-6
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Accessories
Standard Accessories
These accessories are included with the product:
1
Manual, user: 1760-- Series (070-- 8473-- 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.
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)
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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 inserted 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
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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)
Packaging for Shipment
If you ship an instrument to a Tektronix Service Center, follow these packaging instructions:
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.
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Installation
2.
3.
Package the instrument in the original packaging materials. If the original packaging materials are not available,
follow these directions:
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). If the instrument is not in a
cabinet, wrap a cardboard piece around the bagged
instrument to protect components.
c.
Pack dunnage or urethane foam between the instrument 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.
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-carrying 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.
1-10
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Installation
WARNING
When power is supplied, line voltage will be
present in the instrument, even if the POWER
switch is set to STANDBY.
Mains Frequency and Voltage Range
The 1760-- Series monitors operate at 50 and 60 Hz, over the
range of 90-- 250 Volts, without operator adjustment.
Remote Connector
The rear-panel REMOTE connector is a 25-pin, D-type connector. It provides the input for RGB/YRGB staircase, external
horizontal, and remote sync. For more information about the
remote connector, see page 2-8 and page B-1.
RS232 Connector
The rear-panel RS232 connector is a 9-pin subminiature Dtype connector that provides a serial interface for remote
control. The RS232 pin assignments are on page B-1.
Operational Changes
No operational modifications are made to these monitors
through internal jumper settings. Input coupling, DC RESTORER clamp time, RGB/YRGB selections and other similar
configurations are changed through the on-screen menu.
Instrument configuration is described on page 3-20.
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Installation
Mechanical Installation
All qualification testing was performed with a Tektronix
1700F00 cabinet installed. To guarantee compliance with
specifications, operate the instrument in a cabinet or rackmount adapter. The Tektronix 1700F00, 1700F02, and
1700F05 provide the proper electrical environment, supply
adequate shielding, minimize handling damage, and reduce
dust collection within the instrument.
Cabinets
The 1700F00 is a plain cabinet designed for permanent
installations, and the 1700F02 is a portable cabinet with handle, feet, flipstand, and front cover. Ordering information is
given on page 1-8.
WARNING
Do not lift a cabinetized instrument without installing the mounting screws. There is nothing to hold
the instrument in the cabinet if it is tipped forward.
Custom Installation
For applications such as consoles, the instrument can be
mounted with front molding flush or protruding from the
console. In both cases, allow approximately three inches of
rear clearance for BNC and power-cord connections. To
mount the instrument safely, attach it to a shelf strong
enough to hold its weight, using the four 0.156-inch diameter
holes in the bottom of the 1700F00 cabinet. Refer to the data
sheet included with the cabinet for hole locations.
1-12
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Installation
Rackmounting
The 1760-- Series monitors are half-rack width and three rack
units high. They require approximately three inches of rear
clearance for power cord and cable connections, and 20 inches in front of a rack for installation and removal of the
instrument.
The optional 1700F05 rack adapter allows two Tektronix
half-rack instruments to be mounted side-by-side in a rack.
If only one section of the rack adapter is used, a 1700F06
blank panel or 1700F07 utility drawer can be inserted in the
unused section. See page 1-8 for ordering information.
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Installation
1-14
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Instrument Configuration
Focus, scale illumination, signal intensity, readout intensity,
and trace rotation are set through the CRT menu.
Several instrument operating parameters can be set through
the CONFIG menu.
Instructions for using these menus begin on page 3-20.
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Instrument Configuration
1-16
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Getting Started
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At A Glance
Front-Panel Controls
This overview of front-panel controls refers to Figure 2-2.
Controls---Switches---LEDs
H
All front-panel controls are the continuous action
type, and all front-panel buttons are push and release
toggle switches.
H
Green LEDs light to indicate the current switch
selection.
POWER
H
ON/STANDBY turns the instrument on or to standby
status. An LED indicates when power is on.
WARNING
If an appropriate power source is supplied to this instrument, line voltage will be present, even when in STANDBY
mode. Do not operate the instrument without a cabinet or
rack adapter such as those described on page 1-8; serious
injury could result.
Instrument Reset
Certain conditions may cause the 1760-- Series instrument
front-panel controls to become locked. Reset as follows:
H
Turn off instrument power.
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At A Glance
H
Depress and hold the CLEAR MENU and WAVEFORM
buttons while you turn instrument power on again.
Hold both buttons in until the instrument returns to
its normal operating state.
H
If this reset does not unlock the controls, contact
your Tektronix field office or call Tektronix at the
phone number listed in the front of this manual.
Multi-use Controls
H
The center three controls located under the CRT have
functions assigned and labeled through the onscreen menus and readouts. These controls will be
referred to as Bezel Controls. See Figure 2-1.
H
Five small buttons along the right side of the CRT
enable users to make selections from on-screen
menus. These buttons will be referred to as Bezel
Buttons.
Five
Bezel
Buttons
VERTPOS
HORIZPOS
CLEAR
MENU
Three Bezel Controls
Figure 2-1. Multi-Use Bezel Controls and Buttons.
2-2
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VERT POS
HORIZ POS
CLEAR
MENU
OVERLAY
PARADE
A 123
B 123
CH-B3
CH-A3
CH-B2
CH-A2
CH-B1
CH-A1
EXT
REF
RESTORE
DC REST
MAG
FIELD
1760 Series Component Waveform/Vector Monitor User Manual
ON/
STANDBY
POWER
CRT
GAIN
CONFIG
PRESET
LIN SEL
CURSOR
FILTER
MENU
SWEEP
LINE
TIME CODE
PICTURE
LIGHTNING
INPUT
CH-A
CH-B
AUDIO
BOWTIE
WAVEFORM
SCH
MULTIPLE
DISPLAY
WAVEFORM /
VECTOR MONITOR
VECTOR
1760
At A Glance
Figure 2-2. 1760 Front Panel.
2-3
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At A Glance
POSITION
H
VERT POS allows the signal display to be moved
vertically. Offsets for channels A2/A3 and B2/B3
are enabled through the CONFIGURE menu.
H
HORIZ POS allows the signal display to be moved
horizontally.
DISPLAY
H
WAVEFORM provides voltage vs. time display of the
video signal.
H
VECTOR presents an XY plot of demodulated
chrominance phase and amplitude. When a component signal is viewed (input Y, PB, PR and select
COMPONENT through the CONFIG—INPUT menu),
VECTOR plots CH-2 versus CH-3.
H
AUDIO amplitude and phase is monitored using a
calibrated X/Y Lissajous display.
H
SCH (OPTION SC ONLY) provides a vector display of
the subcarrier-to-horizontal-sync phase relationship.
H
LIGHTNING provides a LIGHTNING or DIAMOND
component display, determined by the CONFIGURE—
FORMAT menu setting.
H
DIAMOND evaluates the GBR signal for gamut limit
violations and color errors due to gamma correctors.
H
LIGHTNING is used with color difference signals (Y,
PB and PR). The selection of GBR, SMPTE/ EBU,
BETA, or MII affects the presentation of the signal
and the electronic LIGHTNING graticule.
H
BOWTIE provides a two-line display of component
signals: line one (left half of graticule) shows CH-1
minus CH-2 and line two shows CH-1 minus CH-3.
H
2-4
PICTURE displays the input signal as a picture.
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At A Glance
H
TIME CODE provides monitoring of longitudinal
time code in a frame-rate display.
H
MULTIPLE allows simultaneous selection of WAVEFORM and VECTOR DISPLAY modes.
SWEEP
Sweep buttons are used to select the waveform sweep rate.
H
LINE/FIELD toggles through four sweep rate selec-
tions: one line, two line, one field, and two field.
Two line and two field selections not available with
PARADE or A123 or B123 display.
H
MAG turns on the sweep magnifier. See page 3-6.
DC REST
H
RESTORE turns the DC Restorer on or off. Set DC
restorer speed and clamp point through the CONFIGURE menu, shown on page 3-20.
REF
H
EXT toggles between external (EXT LED on) and
internal reference. Internal reference can be configured for component operation, and two external
reference inputs can be designated for dual-standard
instruments. See CONFIGURE menu on page 3-20.
INPUT
H
Selecting a front-panel input causes the signal that is
input to the corresponding rear-panel connector to
be displayed on screen.
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At A Glance
H
Without PARADE or OVERLAY selected, only one input
selection can be made at a time. Each input channel
button (including A123 / B123) toggles between A
and B, and is cancelled when another input button is
pressed.
H
With PARADE or OVERLAY selected, multiple input
selections can be made; input buttons select A, B,
both, or off, and do not cancel each other.
H
Selecting A123 provides a side-by-side display of the
CH-A1, CH-A2, and CH-A3 inputs (B123 displays the
CH-B1, CH-B2, and CH-B3 inputs). Selecting A123or
B123 turns off all other input channels. When
PARADE or OVERLAY is selected, A123 and B123 can
be displayed together and in combination with other
inputs.
H
PARADE displays up to four input channels side-by-
side, with any additional inputs overlaid. Selecting
PARADE displays the input channel(s) last selected
for PARADE, allowing a custom configuration of
inputs. In PARADE mode, the LINE/FIELD button
offers only two choices: one line and one field.
H
OVERLAY provides an overlaid display of all se-
lected inputs.
MENU
Push the desired menu button to enter that menu and enable
the associated functions. Push the button again to exit the
menu and disable the function. Refer to page 3-7 for more
information about using menus.
H
FILTER allows choice of flat or filtered display of the
waveform signal.
H
CURSOR enables timing cursors, voltage cursors,
vector cursors and markers.
H
LIN SEL allows the selection of a single line or group
of lines for display.
2-6
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At A Glance
H
PRESET allows the user to store and recall up to 9
front-panel setups. One additional recall is factory
pre-programmed. Presets one through eight can also
be accessed remotely.
H
CONFIG allows the user to configure several operat-
ing parameters, such as input coupling, dc restorer
speed, and internal reference designation.
H
GAIN provides selection of X1, X5, X10, and variable
gain.
H
CRT menu allows adjustment of CRT focus, signal
intensity, and trace rotation.
H
CLEAR MENU turns off the selection portions of the
menu readout. When CLEAR MENU has been used to
clear a menu readout, push the menu button once to
reinstate the readout, and once again to exit the
menu.
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At A Glance
Rear-Panel Connectors
The following is an overview of rear-panel connectors.
Figure 2-3 shows the 1760-- Series rear panel.
Loop-Through Inputs
H
H
INPUTS A, A1, A2, A3, B, B1, B2, and B3 are passive
loop-through video inputs, compensated for 75 Ω.
The front-panel INPUT switch settings determine
which channel(s) are displayed. Inputs 1, 2, and 3
are designed for component signals. All inputs can
be used with composite signals.
EXT REF is a 75 Ω compensated loop-through
synchronization input. Internal or external reference
is selected through the front-panel REF EXT switch;
the LED lights to show when external is selected.
The instrument will operate from external references
of composite video or black burst.
Outputs
H
PIX OUT is a 75 Ω compensated output of the video
signal selected by the front-panel INPUT switches.
This signal has bright-up in LINE SELECT mode, and
is used to drive a picture monitor. PIX OUT strobe is
not present below line 11.
H
GBR provides a GBR output for a picture monitor.
Multi-Pin Connectors
H
REMOTE is a 25-pin subminiature D-type connector
which uses TTL signal or ground closures to provide
remote control of many front-panel functions. For
more information about the remote connector, see
page 2-8 and page B-1.
H
2-8
RS232 is a 9-pin subminiature D-type connector that
provides a serial interface for remote control.
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At A Glance
Fuse
H
The instrument’s mains fuse should be replaced only
with a 250V, 2A, F-type cartridge fuse. A replacement fuse is included with the instrument.
AC Power
H
The AC POWER plug is a standard ac plug receptacle
for 120 or 240 Vac power mains. The plug is
compatible with any of the power cord options
available with the 1760-- Series. The monitors
operate at 50 and 60 Hz, over the range of 90-- 250
Volts, without operator adjustment.
Fan Filter
H
Four replacement air filters for the fan are included
with the instrument. Refer to page C-1 for replacement and cleaning instructions.
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2-10
110 VA MAX
90 --- 250V
50/60 HZ
REPLACE
FUSE
WITH
250V 2A
F TYPE
R
G
B
5
9
RS232
6
1
TO AVOID
ELECTRICAL SHOCK,
THE POWER CORD
PROTECTIVE
GROUNDING
CONDUCTOR MUST
BE CONNECTED TO
EARTH GROUND.
WARNING
EXT
REF
PIX
OUT
13
25
B3
A3
REMOTE
B2
A2
!
14
1
B1
A1

75 OHM LOOP--THROUGH COMPENSATED

B
A
DIE IN DIESEM GERAT ENTSTEHENDE ROHTGENSTRAHLUNG IST
AUSREICHEND ABGESCHIRMT.
BESCHLEUNIGUNGSPANNUNG KLEINER ALS 20KV.
At A Glance
Figure 2-3. 1760---Series Rear Panel.
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Operator’s Checkout
Procedure
Before proceeding, read At A Glance starting on page 2-1.
This procedure is designed for operator familiarization and
for checking basic instrument operation (not measurement
quantities or specifications). All illustrations are of the 1765
unless otherwise noted.
If performing this procedure reveals improper instrument
operation, first check the operation of the associated equipment. If the associated equipment is operating normally,
refer the 1760-- Series to qualified service personnel for
repair or adjustment.
Required Equipment
The following equipment is required to perform this procedure:
1. Television Signal Generator with:
Composite Color Bars
Component signal (Y, B-- Y, R-- Y)
Channel Timing (Bowtie)
Black Burst or comparable signal with burst and sync.
For example: TEKTRONIX TSG 130-- Series Multiformat Signal Generator
2. Coaxial Cable, 75Ω (5)
For example: 42-inch RG59U (Tektronix Part No.
012-0159-00)
3. 75Ω Terminators, End-line (4)
For example: (Tektronix Part No. 011-0102-00)
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Operator’s Checkout Procedure
Initial Equipment Connections
H
Connect the 1760-- Series to an appropriate AC power
source.
H
Connect the generator NTSC output (COMPOSITE for
TSG131) to the CH-A input. Connect the CH-A loopthrough to the EXT REF input and connect a 75Ω
terminator to the EXT REF loop-through. See
Figure 2-4.
H
Connect the generator Y output to the CH-A1 input.
Connect B-- Y to CH-A2 and R-- Y to CH-A3. Connect a
75Ω terminator to each loop-through.
H
Set the generator FORMAT to NTSC (COMPOSITE for
PAL).
TSG 130--- SERIES
R-Y
B-Y
NTSC
Y
Y
NTSC
A3
A2
A1
A
B3
B2
B1
B
EXT
REF
1760--- SERIES
Figure 2-4. Equipment hook-up for Operator’s Checkout Procedure.
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Operator’s Checkout Procedure
Procedure
1. Initialize the Front-Panel Controls
Enter the PRESET menu and select FACTORY. Press the bezel
button corresponding to RECALL. The front-panel controls
are now set to the factory preset (described on page 3-18),
and the PRESET menu is automatically exited. Notice that
the instrument is in the WAVEFORM display mode with the
CH-A INPUT displayed in two-line sweep.
2. Adjust the Display
Use the VERT POS and HORIZ POS controls to center the
display.
Enter the CRT menu. DISPLAY will be outlined. Adjust the
bezel controls for optimum focus, graticule scale illumination, and signal intensity. Select READOUT and adjust the
right bezel control for desired readout intensity. Select
TRACE and adjust the center bezel control for a level trace.
Exit the CRT menu. The changes made while in the menu
remain in effect.
3. Input Channel Selection
Press the CH-A/CH-B button to toggle from the CH-A input to
the CH-B input (no signal applied).
Press the CH-A1/CH-B1 button. This cancels the CH-B input
and displays the CH-A1 input. Press this button again to
toggle to the CH-B1 input.
Select the Y, B-- Y, R-- Y output format on the signal generator. Press the 1760-- Series A123/B123 button. This cancels
the CH-B1 input. The A123 indicator lights and a component
parade of CH-A1, CH-A2, and CH-A3 is displayed. See
Figure 2-5. Press the A123/B123 button again; this toggles to
B123 (a display of the CH-B1, CH-B2, and CH-B3 inputs).
Select any other input, which cancels the B123 selection.
Now press the A123/B123 button again, and note that the B123
selection is restored.
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Operator’s Checkout Procedure
Figure 2-5. Component waveform display (A123).
Press the PARADE/OVERLAY button. The PARADE indicator
lights, and the inputs previously selected for parade are
restored (in this case, CH-A1, CH-A2, and CH-A3 from the
factory preset). During PARADE (or OVERLAY) operation, all
input channel buttons (including A123/B123) sequence
through A, B, both, and off. Press the CH-A3/CH-B3 input
repeatedly until it sequences through B, both, off, and back
to A (CH-A3 selected).
Press the CH-A button. Note that this now adds to the display
rather than cancelling the previous input selection. Up to
four inputs can be shown in parade, and any additional
signals are overlaid.
Press the PARADE/OVERLAY button again. The CH-A1 and
CH-A2 signals are superimposed. Exit PARADE/OVERLAY
mode. Note that the inputs selected before entering parade or
overlay mode (B123) are restored.
2-14
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Operator’s Checkout Procedure
4. Check Gain
The 1760-- Series internal calibrator can be used to check
instrument calibration. Select CH-A input and set the generator for NTSC Color Bars output (COMPOSITE for PAL).
Enter the configuration menu and select CALIBRATE. Turn on
the calibrator signal and note that the amplitude is 140 IRE
(1.0 V PAL), with one cycle per division. See Figure 2-6.
Select VECTOR display mode. Note that the calibrator signal
overlays the compass rose. Return to WAVEFORM display
mode.
Exit the configuration menu. Note that the calibrator signal
is automatically turned off. (For more information on using
the calibrator signal, see page 4-25.)
10S/DIV
Figure 2-6. Calibrator display.
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Operator’s Checkout Procedure
5. Gain Control
There are three calibrated vertical gain settings available (X1,
X5, and X10), as well as an independent variable gain control.
Enter the GAIN menu and select X5. Note that X5 is outlined
and the display is amplified. Select X10. Note that X10 is
outlined and the display is amplified again.
Select variable gain and use the right bezel control to adjust
the gain to the minimum and maximum settings.
Exit the GAIN menu, then enter it again. Note that the variable and X10 gain settings are restored. Exit the GAIN menu.
Adjust the VERT POS control to place the signal on baseline.
6. Select Timing Reference
The factory preset selects a two-line sweep. Note that
pressing the LINE/BUTTON button will cycle through four
selections: one-line, two-line, one-field, and two-field
sweeps. Return to the two-field sweep.
Press the MAG button. The MAG indicator lights and a
1 S/Div sweep is displayed. Use the HORIZ POS control to
view the magnified display, then turn off the MAG. (See page
3-6 for a list of sweep rates.)
7. Voltage and Timing Cursors
The 1760-- Series voltage, timing, and vector cursors can be
used to measure any portion of the displayed signal.
Enter the CURSOR menu (factory preset selects voltage
cursors; VOLT is outlined on screen). The voltage cursors
appear as two dashed horizontal lines: cursor 1 has single
dashes and cursor 2 has double dashes. Use the left and
center bezel controls to adjust the cursors individually, or the
right control to move both cursors by the same amount
(TRACK). The voltage difference between the cursors is
displayed as ∆V. Align a voltage cursor with a signal reference point and press MAG. The cursor is still at the same
point on the signal (use the HORIZ POS control if needed to
view the cursor).
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Operator’s Checkout Procedure
Select timing cursors (TIME). The timing cursors appear as
two vertical dashed lines: cursor 1 has single dashes and
cursor 2 has double dashes. The time difference between
them is displayed as ∆T. Select voltage and timing cursors
together (V+T). Note that when CONTROL is set to TIME, the
three bezel controls adjust timing cursors; when set to VOLT,
they adjust voltage cursors.
Select markers (MARK). The markers appear as three dashed
lines; marker 1 has long single dashes, marker 2 has double
dashes, and marker 3 has short dashes. Use the three bezel
controls to position the markers to a reference point on the
etched graticule (such as peak white, baseline, and sync tip).
Select X5 gain and notice that the markers do not move.
These markers can be used to highlight desired features of
the waveform graticule.
Select VECTOR display mode. The vector cursor menu is
displayed (POLAR has been selected by the factory preset).
The polar cursor appears as cross hairs. Use the left bezel
control to move the cursor away from graticule center, and
the center bezel control to move the cursor around the
graticule center point. Note that the amplitude and phase of
the cursor are displayed on screen.
Select MARK and set QUANTITY to 2. Note that the two
graticule markers appear as small numbered boxes. Set
CONTROL to 1 and use the left bezel control to move marker
1 away from the graticule center. Use the center control to
move the marker around the graticule center point. Change
CONTROL to 2. Use the bezel controls as for marker 1.
Select X5 gain and note that the markers do not move. These
markers can be used to highlight desired features of the
vector graticule. Return to WAVEFORM display mode.
Exit the cursor menu, then enter the menu again. Note that
MARK is still selected and marker positions are unchanged.
Exit the menu. (For more information about using the
cursors, see page 3-10.)
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Operator’s Checkout Procedure
8. Filter Selection
The 1760-- Series offers several filter selections for the
waveform display.
Ensure that the instrument is operating in waveform mode.
Enter the FILTER menu (FLAT is selected by the factory
preset). Select LUM filter. This provides a low-pass-filtered
display of the luminance portion of the signal. See
Figure 2-7.
10S/DIV
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
Figure 2-7. Two-Line LUM filter display of color bar signal.
Select CHROM. This provides a bandpass-filtered display of
the chrominance portion of the signal. See Figure 2-8.
Select F+L (FLAT plus LUM). The flat display is superimposed on the luminance-filtered display (overlay is selected
by the factory preset). Press the appropriate bezel button
(not the front-panel PARADE button) to select parade. The
flat display is now on the left, followed by the luminance-filtered display.
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Operator’s Checkout Procedure
10S/DIV
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
Figure 2-8. Two-Line CHROM filter display of color bar signal.
Select F+L+C (FLAT plus LUM plus CHROM). The display is
similar to the F+L display, with the chrominance-filtered
signal added on the right.
Select DIFF. Select the generator 5-step staircase signal. The
differentiated-step filtered display appears similar to
Figure 2-9.
Select R---Y. This provides a demodulated chrominance-vs.time display. Use the right bezel control to adjust vector
phase. See Figure 2-10.
Select SCH R---Y (Option SC only). This provides a demodulated SCH sync-locked oscillator display, useful for viewing
SCH variations versus time. A sample NTSC display is
shown in Figure 2-11. NTSC signals can be viewed in either
line or field sweeps. For PAL applications, view the signal in
two-field sweep (see Figure 2-12). Use the right bezel control
to adjust vector phase.
Exit the filter menu. Enter the menu again and note that the
filter selections are unchanged. Select FLAT. Exit the menu.
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Operator’s Checkout Procedure
10S/DIV
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
Figure 2-9. Two-Line DIFF filter display of 5-step staircase signal.
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
VECTOR PHASE
Figure 2-10. Two-Line R ---Y display of color bar signal.
2-20
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Operator’s Checkout Procedure
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
VECTOR PHASE
Figure 2-11. Two-Field SCH R ---Y display (NTSC), showing proper SCH phase.
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
VECTOR PHASE
Figure 2-12. Two-Field SCH R ---Y display (PAL), showing proper SCH phase.
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Operator’s Checkout Procedure
9. Line Selection
Line select is available in WAVEFORM, VECTOR, SCH, and
PICTURE display modes. Enter the LINE SELECT menu and
turn the center bezel control until the readout displays ALL
131. In a two line display, line 131 appears on the left,
followed by line 132.
Select 2 FIELD sweep and note the intensified line in each
field. Select 15H and note that 15 lines are now intensified
in each field (intensified portion appears wider). The
readout is now ALL 131-- -- 145. See Figure 2-13.
Select 1 of2. Now only the first field has intensified lines,
and a NEXT FIELD selection appears. Select NEXT FIELD and
note that the intensified lines now appear only in the second
field and the readout is F2 131 F2 145.
Select MULTIPLE with WAVEFORM, VECTOR, and SCH. Note
that the displays appear in the following order: WAVEFORM,
VECTOR, SCH.
Exit the line select menu. Enter the menu again and note
that the user settings are unchanged. Exit the menu.
ALL131
- - 145
FIELD
ALL 1OF2
1OF4 1OF8
1H
15H
LINE SEL
Figure 2-13. Line Select display with 15H selected, in 2 FIELD sweep.
2-22
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Operator’s Checkout Procedure
10. Vectorscope Display
Select VECTOR display mode. Adjust the right bezel control
to place the burst vector on the 180° graticule line. The
display should appear similar to Figure 2-14.
11. Picture Monitor Display
Select PICTURE display mode. A picture monitor display of
the selected input signal appears. This can be used to visually identify the signal source. See Figure 2-15.
12. Audio Display
To obtain an audio display, connect the left and right audio
signals to the rear-panel REMOTE connector as follows: +Y
to pin 8, - Y to pin 9, +X to pin 10, and - X to pin 11. Select
AUDIO display mode.
An audio signal with no phase error appears as a straight line
extending from the audio box in the upper right corner of the
graticule to the box in the lower left. A signal with phase
error appears as an opening in a lissajous waveform. See
Figure 2-16.
VECTOR PHASE
Figure 2-14. Vectorscope color bar display.
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Operator’s Checkout Procedure
Figure 2-15. Picture mode display of color bar signal.
Figure 2-16. Audio display with phase error.
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Operator’s Checkout Procedure
13. SCH Display (Option SC Only)
The SCH display mode provides a vector display of the
subcarrier-to-horizontal-sync phase relationship. (SCH
measurements appear on page 4-10.)
For NTSC operation, verify that REF is set to internal, then
select SCH display mode. This provides a dual-dot display,
as shown in Figure 2-17. Select EXT REF. This provides the
single-dot display, shown in Figure 2-18.
For PAL operation, the REF selection does not affect the
display. A sample PAL display is shown in Figure 2-18.
VECTOR PHASE
Figure 2-17. NTSC SCH display with internal reference selected.
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Operator’s Checkout Procedure
VECTOR PHASE
Figure 2-18. PAL SCH display.
14. Lightning Display
For a Lightning display, select the Y, B-- Y, R-- Y format on
the signal generator. Enter the CONFIG menu and select
FORMAT. Select the proper format for your signal source
(GBR, SMPTE/EBU, BETA or MII). Under DISPLAY, select
LIGHTNING. Leave the configuration menu selected.
Select LIGHTNING display mode. The display should be
similar to Figure 2-19.
Under DISPLAY, select DIAMOND. Select 100% Bars on the
signal generator. Figure 2-20 shows a sample display. Exit
the configuration menu. Information on using the Lightning
and Diamond displays appears on page 4-16.
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Operator’s Checkout Procedure
Y
L
DISPLAY
LIGHTNING
DIAMOND
C
G
M
R
INPUT
VECTOR
B
525/60
GBR
SMPTE/EBU
R
BETA
MII
M
B
FORMAT
G
STANDARD
C
OFFSET
CALIBRATE
Y
L
625/50
GBR
SMPTE/EBU
BETA
MII
REMOTE
REFERENCE
Figure 2-19. Lightning Display in MII Format.
DISPLAY
LIGHTNING
DIAMOND
G
B
INPUT
VECTOR
G
FORMAT
STANDARD
OFFSET
CALIBRATE
REMOTE
REFERENCE
525/60
GBR
SMPTE/EBU
BETA
MII
R
625/50
GBR
SMPTE/EBU
BETA
MII
Figure 2-20. Diamond display, showing signal within gamut limit.
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Operator’s Checkout Procedure
15. Bowtie Display
For a Bowtie display, select the Channel Timing signal from
the generator. Select BOWTIE display mode on the 1760-- Series. The display should appear similar to Figure 2-21.
Information on making measurements with the Bowtie
display appears on page 4-21.
Figure 2-21. Bowtie display.
This concludes the Operator’s Checkout Procedure.
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Operation Basics
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Functional Overview
The Functional Overview describes instrument functions in
greater detail than At A Glance. For menu operation, refer to
page 3-7. Detailed Measurement procedures are given in
Basic Measurements, beginning on page 4-1.
Display Modes
H
VECTOR
H
SCH (Option SC only)
H
WAVEFORM
H
AUDIO
H
LIGHTNING and DIAMOND
H
BOWTIE
H
PICTURE
H
TIME CODE
H
MULTIPLE displays
Composite Component
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Vector
The vector mode presents an XY plot of demodulated chrominance phase and amplitude. The angle represents chrominance phase and the distance from the center represents
chrominance amplitude. A bezel control is assigned to adjust
VECTOR PHASE.
With a component input (A123 or B123), VECTOR displays
CH-3 (typically R-- Y or PR) versus CH-2 (typically B-- Y or
PB).
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Functional Overview
SCH (Option SC Only)
SCH
provides a vector display of the subcarrier-to-horizontalsync phase relationship. The burst vector and the phase of
the 50% point of the leading edge of sync are displayed.
Subcarrier-to-horizontal phase and color framing are displayed graphically in the polar SCH display. Sync jitter over
the field is displayed as a moving sync vector dot. Correct
color framing can be verified by the position of the single
sync vector dot, relative to the color subcarrier vector when
the monitor is externally referenced.
The SCH phase of the reference signal is separately sensed to
allow reliable color framing comparison. Using this method
of determining relative color framing eliminates the requirement for a precise horizontal timing match between the reference and measured signals.
Waveform
The waveform monitor portion of the instrument provides a
voltage-versus-time display of the video signal. The selected
input can be displayed in one or two line, or one or two field
sweeps. In LINE SELECT mode, identified lines of any field
can be selected and displayed. Multiple inputs can be displayed at the same time, or multiple filters can be applied to
one input for signal analysis. TIME and VOLTAGE cursors can
be activated and positioned for reference or measurement.
LINE SELECT is discussed on page 3-16 and CURSORS are
discussed on page 3-10.
Audio
Audio amplitude and phase is monitored using a calibrated
X/Y Lissajous display. The operator can verify that the program audio will be properly reproduced on both monaural
and stereo receivers. Correct phasing between two audio
channels is quickly verified by the direction of the display.
3-2
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Functional Overview
Lightning
The front-panel LIGHTNING button is used for both the Lightning display and the Diamond display. For Lightning display, use the CONFIG—FORMAT menu (page 3-21) to set the
DISPLAY to LIGHTNING and select the appropriate format for
your system. Push CLEAR MENU to clear the menu readout.
Selecting Lightning mode forces the instrument to A123 input display; it can be changed to B123. Apply component
signals Y, PB and PR to the rear panel connectors for CH-A1,
A2, and A3 or CH-B1, B2, and B3. Procedures for using the
Lightning display can be found in the Operator’s Checkout
and on page 4-16.
NOTE
A123 (or B123) must be configured as a component input. See CONFIGURE menu, page 3-20.
Diamond
For a Diamond display, push the LIGHTNING button and use
the CONFIG—FORMAT menu to set DISPLAY to DIAMOND.
Apply a component signal to the rear panel connectors for
CH-A1, A2, and A3 or CH-B1, B2, and B3. The Diamond
display evaluates the GBR signal for gamut limit violations
and color errors due to gamma correctors. Signals which are
inside the electronic diamond graticule are within gamut limit. For signals outside the diamond, the graticule is labeled
with G, B, and R to determine the color problem area.
NOTE
A123 (or B123) must be configured as a component input. See CONFIGURE menu, page 3-20.
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Functional Overview
Bowtie
In BOWTIE mode, the display is forced to a two line or field
sweep and A123 input is selected. The left half of the display shows CH-1 minus CH-2 and the right half shows CH-1
minus CH-3. If the timing between channels is matched, the
centers of the bowties will be centered and not skewed. If
CH-2 is delayed with respect to CH-1, the skew moves to the
right. If CH-2 is advanced with respect to CH-1, the skew
moves to the left.
NOTE
A123 (or B123) must be configured as a component input. See CONFIGURE menu, page 3-20.
Picture
The PICTURE mode allows the operator to verify the signal
source. In PICTURE mode with LINE SELECT on, a bright-up
marker identifies the selected line in the picture.
Time Code
Longitudinal time code is monitored in a frame-rate display
to allow observation of amplitude, synchronization, and
phase with respect to reference vertical sync. Synchronization is confirmed by the stationary display and time code
phase is determined by horizontal position of the time code
sync word on the CRT.
Multiple
When MULTIPLE is pushed, WAVEFORM, VECTOR, and SCH
(Option SC only) can be selected at the same time.
When exiting MULTIPLE, the instrument will return to the
previous (non-MULTIPLE) DISPLAY settings. When entering
MULTIPLE again, the previous MULTIPLE display settings will
be restored.
3-4
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Functional Overview
Displaying a Signal
Inputs
There are eight rear-panel loop-through inputs, which may
eliminate the need for an external routing switcher. The inputs can be displayed singly or in combination.
Without PARADE or OVERLAY selected, only one input selection can be made at a time. Each input channel button (including A123 / B123) toggles between A and B, and is
cancelled when another input button is pressed.
With PARADE or OVERLAY selected, the input channels can be
displayed in combination. Pushing an input channel button
sequences through the labeled channels, both, then off. Pushing another input button does not cancel the current selection, but adds to it. To return to “single input” operation,
push the PARADE/OVERLAY button until it is off (LED is no
longer lighted).
A123 / B123
Selecting A123 provides a side-by-side display of the CH-A1,
CH-A2, and CH-A3 inputs (B123 displays the CH-B1, CH-B2, and
CH-B3 inputs). This is designed for monitoring component
signals.
Parade
Selecting PARADE displays the input channels last selected
for PARADE, allowing a custom configuration of inputs. In
PARADE mode, the LINE/FIELD button offers only two choices:
one line and one field.
PARADE allows up to four channels to be displayed side-by-
side. Additional channels will be overlaid.
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Functional Overview
Overlay
OVERLAY superimposes the selected input signals. In OVERLAY mode, the LINE/FIELD button remains a four-way toggle,
providing one line, two line, one field, and two field displays.
Sweep
Sweep buttons are used to select the waveform sweep rate.
LINE/FIELD toggles through four sweep rate selections: one
line, two line, one field, and two field. In PARADE mode, the
LINE/FIELD button becomes a two-way switch, toggling between line and field.
The sweep rate is displayed in the upper right corner of the
CRT (for field-rate sweeps, 1 F or 2 F is displayed).
The MAG button is used with LINE/FIELD to provide horizontal
magnification of each rate as follows:
3-6
H
One line magnified = 200 ns/division
H
Two line magnified = 1 µs/division
H
One field or two field magnified = approximately
X20 magnification.
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Using the Menus
General menu information here is followed by detailed
information about each menu: FILTER, CURSOR, LIN SEL,
PRESET, CONFIG, GAIN and CRT. To set instrument operating
parameters, see CONFIG and CRT menu information.
General Menu Information
Push the desired menu button to obtain an on-screen menu
readout.
Multi-Use Bezel Controls and Buttons
Menu selections appear along the right side of the screen.
Descriptive labels, when present, appear in ITALIC text. Actual selections appear in STANDARD text, with the present
selection outlined. Use the five buttons along the right side
of the CRT (referred to as bezel buttons) to change the selections.
The center three controls under the CRT are referred to as
Left, Center, and Right bezel controls. Control functions
vary with menu choice; a readout just above each active control shows its present function. These controls are used as
variable analog controls to set values such as phase, amplitude, and intensity. The left control is also used to select
categories within the CONFIG menu.
Figure 3-1 shows the bezel controls and buttons.
Moving Between Menus
Selecting a second menu removes the present menu display,
but the functions typically remain active (with the menu LED
remaining lighted to show this state). To reinstate a menu
display, push that menu button again.
CRT, PRESET, and CONFIG menus will be exited completely
when another menu button is pushed.
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Using the Menus
Clear Menu
Push CLEAR MENU to clear part of the menu display, but leave
essential readout elements such as control assignments and
measurement readouts. (The menu LED remains lighted to
show this state.) Push the menu button to bring back the full
display.
CRT, PRESET, and CONFIG menus will be exited completely
when CLEAR MENU is pushed.
Exiting a Menu Function
To exit a menu function while its display is present, push that
menu button. (The menu button is functioning as an on-off
toggle switch). If the menu display is not present, but the
menu function is still in effect (LED is lighted), push the
menu button to bring back the full display, then push it again
to exit the menu.
DISPLAY
READOUT
TRACE
Bezel
Buttons
TEST
ON OFF
FOCUS
SCALE
INTENSITY
VERTPOS
HORIZPOS
CLEAR
MENU
Left
Center
Right
Bezel Controls
Figure 3-1. The CRT menu, showing bezel controls and bezel buttons.
3-8
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Using the Menus
Filter Menu
The FILTER menu is available for WAVEFORM mode only.
Note that the instrument must be in WAVEFORM mode to access the R-- Y displays. When the FILTER button is pushed in
WAVEFORM mode, an on-screen menu allows the following
selections. The bezel buttons are self-cancelling.
H
FLAT — provides flat (normal) response.
H
LUM — provides a low-pass response to display the
luminance portion of the composite video signal.
H
CHROM — provides bandpass response centered on
the chrominance subcarrier frequency, and displays
frequencies around the subcarrier frequency.
H
DIFF — is a differentiated step filter (linearity steps
are translated into impulses for amplitude comparison).
H
R-- Y — selects demodulated chrominance-versus-
time display. The chrominance is demodulated on
the R--Y (V) axis when burst is lined up on the
normal axis. The VECTOR PHASE control can adjust
the demodulator phase to any axis.
H
SCH R-- Y (Option SC Only) — demodulates the SCH
sync-locked oscillator. This display is useful for
viewing SCH variations versus time.
H
F + L — displays the video signal both flat and
luminance filtered. The display is in parade or
overlay mode, as selected through the on-screen
menu. When PARADE is selected, the flat display is
on the left.
H
F + L + C — displays the video signal flat, lumi-
nance filtered, and chrominance filtered. The signal
is displayed in parade or overlay mode, as selected
through the on-screen menu. When PARADE is
selected, the flat display is on the left, with the
chrominance-filtered display on the right.
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Using the Menus
Cursor Menu
Press the CURSOR menu button to enter the cursor menu.
Cursors are available in composite and component operation
for VECTOR, WAVEFORM, and VECT+WFM DISPLAY modes.
Vector Cursor Control
In VECTOR display mode, a bezel button is used to select polar cursors (POLAR) or markers (MARK). The polar cursor appears as crosshairs, as shown in Figure 3-2. The left bezel
control is used to adjust cursor amplitude, and the center control adjusts cursor phase. The right bezel control adjusts the
phase of the vector signal.
When Vector markers are selected, additional readouts appear, allowing the user to select the quantity of markers that
will be present (1 through 8), and which of these markers is
currently controlled by the bezel controls. The left bezel
control adjusts the amplitude of the selected marker, and the
center bezel control adjusts its phase. The right bezel control
adjusts the phase of the vector signal.
AMPL
75.0IRE
PHASE
145.0°
VEC CURSOR
POLAR
MARK
AMPLITUDE
PHASE
VECTOR PHASE
VERTPOS
HORIZPOS
CLEAR
MENU
Left
Center
Right
Figure 3-2. The VECTOR CURSOR menu.
3-10
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Using the Menus
Waveform Cursor Control
In WAVEFORM display mode, the bezel buttons are used to
select timing cursors (TIME), voltage cursors (VOLT), both
voltage and timing (V+T), or markers (MARK). The Waveform cursor menu is shown in Figure 3-3.
H
When voltage cursors are selected (VOLT), the left
bezel control is used to adjust the vertical position
of the first voltage cursor, and the center bezel
control adjusts the second voltage cursor. The right
bezel control is used to move the vertical position of
both cursors vertically, in tandem. The readout ∆V
shows the voltage difference (positive or negative)
between the two cursor positions, up to four significant digits.
H
When timing cursors are selected (TIME), the left
bezel control is used to adjust the horizontal position
of the first timing cursor, and the center control
adjusts the horizontal position of the second timing
cursor. The right bezel control moves both cursors
horizontally, in tandem. The readout ∆T shows the
time difference (positive or negative) between the
two cursor positions, up to four significant digits.
H
When markers are selected (MARK), the left bezel
control is used to adjust the horizontal position of
the first marker line, the center bezel control adjusts
the second marker, and right bezel control adjusts
the third marker.
H
When both voltage and timing cursors are selected
(V+T), a control assignment appears on the screen.
The bezel button is used to assign the control to
voltage or timing cursors. The bezel controls work
the same as for the individual timing and voltage
cursor modes. Both voltage and timing readouts are
present.
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Using the Menus
∆V
700 mV
WFM CURSOR
VOLT
TIME
MARK
V+T
VOLT1
VOLT2
TRACK
VERTPOS
HORIZPOS
CLEAR
MENU
Left
Center
Right
Figure 3-3. The WAVEFORM CURSOR menu.
Voltage Cursor 1
∆V
700 mV
WFM CURSOR
VOLT
TIME
MARK
Voltage Cursor 2
V+T
VEC CURSOR
POLAR
MARK
Timing Cursor 1
Timing Cursor 2
VOLT1
VERTPOS
VOLT2
TRACK
CONTROL
VOLT
TIME
HORIZPOS
CLEAR
MENU
Figure 3-4. The VECTOR+WFM CURSOR menu with V+T selected.
3-12
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Using the Menus
Vector + Waveform (Multiple)
If MULTIPLE is pressed and both VECTOR and WAVEFORM displays are selected, menus for all cursor types will be displayed. See Figure 3-4. All cursor functions are available in
this mode (the top three bezel buttons are self-cancelling).
Bezel control assignments are the same as for the individual
modes.
Using the Cursors
With Vector Display
To use vector cursors, operate in VECTOR or VECTOR+WAVEFORM mode and press the CURSOR MENU button. There are
two vector cursor displays: POLAR and MARK. (The VECTOR
PHASE bezel control continues to adjust the phase of the signal.)
Polar Cursors can be used to measure the amplitude and
phase of the chrominance signal. When POLAR is selected,
position the cursor (cross hairs) with the AMPLITUDE and
PHASE bezel controls, and view the amplitude and phase
readouts at the top of the screen. See Figure 3-2. When a
component signal is displayed (A 1-2-3 or B 1-2-3), it will be
encoded so that the readout phase and amplitude matches
that of a composite signal. This feature allows the operator
to set component equipment to a specific color phase if the
composite phase value is known.
The cursor zero amplitude point is the center point of the
graticule. Using the amplitude control to move the cursor
out from the center increases the amplitude. Adjusting the
cursor phase will rotate the cursor around the center point,
with the zero phase point being the B-- Y (U) axis. The amplitude readout can be set for mV or IRE values through the
CONFIG menu, described on page 3-20.
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Using the Menus
When the gain or position of the signal is changed, the polar
cursors maintain their relationship with the signal.
When CLEAR MENU is pressed, the POLAR / MARK choice on
the right side of the screen will be removed, but the bezel
controls will still be active and cursor measurements can still
be made. When another menu is selected, the bezel controls
may be reassigned to the new menu, but will return to cursor
control when the new menu is deselected.
Markers can be used to highlight graticule points. They
function the same for composite or component signals.
When MARK is selected, two additional menu readouts appear. These allow selection of from one to eight markers,
and assign the AMPLITUDE and PHASE bezel controls to one
of these markers. Markers are designed to be used for reference points; there is no quantitative readout. Markers are
positioned with respect to the graticule and are not moved or
resized with the signal.
When CLEAR MENU is pressed, all of the marker readout except the boxes will be removed. The readout will be restored
when CURSOR menu is selected again. When CURSOR menu
is exited and re-entered, the selected cursor quantity and
position will be retained. One use of markers is to position
them on the vector target boxes. Adjust the signal source
until the color bar signal appears in the marker boxes.
If it becomes necessary to compensate for minor shifting of
markers due to drift or external magnetic fields (particularly
if the instrument is moved after the markers are set), enter
the CRT menu and select READOUT. Use the bezel controls to
adjust vertical position (VPOS) and horizontal position
(HPOS) until the center of the displayed test pattern is at the
center of the graticule.
3-14
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Using the Menus
With Waveform Display
Voltage Cursors can be used to make accurate signal amplitude measurements. With VOLT selected, use the left bezel
control to position the VOLT1 cursor at the upper excursion of
signal to be measured, and the center bezel control to position the VOLT2 cursor at the lower excursion. The on-screen
readout gives the voltage difference between the two levels.
When GAIN is changed, the voltage cursors maintain their
relationship with the signal. For example, if the VOLT2 cursor
were set to the signal sync tip in X1 GAIN, it would also be at
sync tip in X5 gain, X10 gain, or with VAR gain on.
Timing Cursors can be used to make accurate time measurements. When TIME is selected, position the TIME1 cursor at
the left excursion of the signal to be measured, and the TIME2
cursor on the right. The on-screen readout gives the time
difference between the two points.
When MAG is selected, the timing cursors maintain their relationship with the signal. For example, if the VOLT1 cursor
were set to the rising edge of sync, it would also be set there
with MAG selected.
Markers. When MARK is selected, use the bezel controls to
vertically position the markers where desired with respect to
the graticule markings. These markers are designed to be
used for reference points; there is no amplitude readout. The
markers are not affected by GAIN changes; if a marker were
set to 100 IRE in X1 GAIN, it would still be set to 100 IRE with
the MAG on.
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Using the Menus
Line Select Menu
Pushing the LIN SEL menu button enables the line select mode
and provides a menu display. The center bezel control is
assigned to select the line number. The following choices
can be made using the bezel buttons that correspond to the
on-screen labels:
1760-- Series
H
1H or 15H (one line or 15 lines)
H
FIELD
H
NEXT FIELD
— ALL or 1of 2
— (Appears only when 1of 2 FIELD is
selected.) Push the corresponding bezel button to
sequence through the fields designated by the FIELD
selection. A box flashes momentarily around the
on-screen label to verify that the selection has been
made.
1760-- Series Option SC
— ALL or 1of2 or 1of 4 or 1of8
H
FIELD
H
1H or 15H (one line or 15 lines)
H
NEXT FIELD
— (Appears only when 1of 2, 1of4, or
1of 8 FIELD is selected.) Push the corresponding
bezel button to sequence through the fields designated by the FIELD selection.
H
ALT 2 FIELD
— (Appears only when 1of 4 FIELD is
selected.) Push the corresponding bezel button to
toggle between the current field and the second next
field; for example, FIELD1 and FIELD3.
H
ALT 4 FIELD
— (Appears only when 1of 8 FIELD is
selected.) Push the corresponding bezel button to
toggle between the current field and the fourth next
field; for example, FIELD1 and FIELD5.
3-16
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Using the Menus
When bezel buttons corresponding to NEXT FIELD,
ALT 2 FIELD, or ALT 4 FIELD are pushed, a box
flashes momentarily around the on-screen label to
verify that the selection has been made.
Readout
The line select readout (in the upper left of the CRT) consists
of field followed by line number. When 15H is selected, the
readout also displays the range of line numbers. For example, select FIELD 1 and 15H, then rotate the LINE SEL control
to 34. The readout is field 1, lines 34to 48:
F1 34
F1 48
Line Select Functions
All menus are functional during line select operation. The
line select menu display disappears when another menu is
selected, but the selected line and field are displayed until the
line select menu is exited. (The field and line readout remains in the upper left of the screen, and the line select LED
remains lighted to indicate this state.)
Line select can also be used with MULTIPLE displays of WAVEFORM, VECTOR, and SCH. Selected displays appear on the
screen in the following order: WAVEFORM, VECTOR, SCH.
The readout indicates the line number of the highest priority
display. For example: with waveform and vector displays
both selected, a readout of F1:20 would indicate that field 1,
line 20 is displayed in waveform mode, and field 1, line 21 is
displayed in vector mode.
In a waveform display, the selected line is displayed first in a
two-line sweep, and brightened in a field sweep.
When line select is enabled, the rear-panel PIX MON output
highlights the selected line on the picture monitor display.
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Using the Menus
Preset Menu
The 1760-- Series has 10 presets capable of storing front-panel
setups. Nine of the presets are user-programmable and one is
factory pre-programmed.
Factory-programmed setup: WAVEFORM DISPLAY, CH-A
INPUT, DC REST ON, 10 µs SWEEP, REF internal, and menus
off.
Push the PRESET menu button to access the on-screen menu,
illustrated in Figure 3-5. Turn the left bezel control to select
the PRESET location to be acted on (presets 1-- 9 are available
through the menu). Next, use the bezel button corresponding
to the desired action (RECALL, STORE, RENAME, OR RECOVER). When a bezel button is pushed, a box flashes momentarily around the on-screen label to verify that the selection
has been made.
RECALL
STORE
PRESET 1
PRESET 2
PRESET 3
PRESET 4
PRESET 5
PRESET 6
PRESET 7
PRESET 8
PRESET 9
FACTORY
Bezel
Buttons
RENAME
RECOVER
VERTPOS
HORIZPOS
CLEAR
MENU
Left
Center
Right
Figure 3-5. The PRESET menu display.
3-18
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Using the Menus
Recall
Use the left bezel control to select (outline) a preset for recall. Push RECALL to recall the stored instrument configuration.
Recover
Push RECOVER to restore the front-panel setup that was in
effect before RECALL was pushed.
Store
To begin storing a setup, push STORE. Make sure the frontpanel controls are set as desired, and use the left bezel control to select the storage location (shown outlined).
Push STORE IT to store the current front-panel settings at the
outlined PRESET location. (Push the bezel button corresponding to RETURN if storing is not desired. This will cancel and exit the STORE operation.)
Rename
Selecting RENAME will provide an on-screen display, assigning the center and right bezel controls to LOCATION and LETTER. Turn the center control to select the letter that will be
changed (move the box to the desired location within the
preset name). Turn the right control until the selected letter
changes to the desired new letter.
Push RETURN if renaming is not desired. All changes to the
name will be cancelled.
When the change has been made satisfactorily, select ACCEPT to store the new name.
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Using the Menus
Configure Menu
Push the CONFIG button to display the configure menu,
shown in Figure 3-6. Turn the left bezel control to select
INPUT, VECTOR, FORMAT, STANDARD, OFFSET, CALIBRATE,
REMOTE, or REFERENCE (a box appears around the selec-
tion). Following are descriptions of each selection.
INPUT
H
COUPLING
— Selects AC or DC coupling for
rear-panel inputs.
H
DC RESTORER
—Selects the clamp speed. Slow
will clamp while displaying any hum.
H
CLAMP—Selects
the point of the video signal that is
clamped to 0. Can be set for ST (sync tip) or BP
(back porch).
COUPLING
AC
DC
DCRESTORER
SLOW
FAST
Bezel
Buttons
CLAMP
ST
BP
INPUT
VECTOR
FORMAT
STANDARD
OFFSET
CALIBRATE
REMOTE
REFERENCE
A123
COMPOSITE
COMPONENT
B123
COMPOSITE
COMPONENT
VERTPOS
HORIZPOS
CLEAR
MENU
Left
Center
Right
Figure 3-6. The CONFIGURE menu display with INPUT selected.
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Using the Menus
H
A123
— and B123 — When COMPOSITE is se-
lected, the instrument’s internal reference is the
input channel currently selected for display. For
COMPONENT, the internal reference is A1 when A123
is selected, and B1 when B123 is selected (sync is
present only on the first channel).
VECTOR
H
BARS — The instrument can be configured to accept
75% or 100% amplitude color bar signals. DualStandard instruments allow color bar signal amplitudes to be set for NTSC and for PAL operation.
H
SETUP — (NTSC operation only) Configures the
instrument to accept signals with or without setup.
H
PAL — (PAL operation only) When +V is chosen,
the phase reference of the - V lines is inverted, then
shown as an overlay on the +V lines to provide a
comparison display. +V shows +V and - V on
alternate lines.
H
TEST — Used by service personnel; refer to the
service manual.
FORMAT
H
CONFIG—FORMAT is used to to select the configura-
tion of signals used for interconnection of equipment. Available signal formats are: GBR, SMPTE/
EBU, BETA, and MII. When viewed as a waveform
parade display, GBR signals may be displayed in
either GBR sequence or RGB sequence, as selected
through the GBR PARADE GBR/RGB menu.
Table 3-1 shows valid format selections.
H
CONFIG—FORMAT is also used to select which
display (LIGHTNING or DIAMOND) is present when
the front-panel LIGHTNING button is pressed.
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Using the Menus
Table 3-1.
FORMAT
525/60
GBR
SMPTE / EBU
BETA
MII
625/50
GBR
SMPTE / EBU
BETA
MII
[1]
[2]
[3]
[3]
Valid FORMAT selections.
BARS [1]
SETUP [2]
75% 100%
Y
75% 100%
Y
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
N
•
•
• •
•
N
•
•
•
•
75% or 100% Bars selected through CONFIG—VECTOR menu.
Setup Yes or No is selected through the CONFIG—VECTOR
menu. The setup selection is only relevant with 525/60 BETA,
and is ignored in all other formats.
MII is identical to SMPTE/EBU in 625/50.
STANDARD
H
CONFIG—STANDARD allows the user to set the cursor
unit of measure to MV, IRE, or AUTO. When AUTO is
selected, cursor units are automatically changed to
IRE when operating in the NTSC standard, and MV
when operating in the PAL standard.
H
3-22
For dual-standard instruments, a menu selection of
NTSC, PAL, or AUTO standard is also available.
When AUTO is selected, the operating standard is
changes automatically to match the standard of the
displayed input signal. A circled “A” precedes
NTSC or PAL on the readout.
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Using the Menus
OFFSET
H
The VERTICAL POSITION control normally positions
all channels together. When OFFSET is enabled, the
bezel controls can be used to offset input channels 2
(A or B) and 3 (A or B) with respect to channel 1 (A or
B) .
H
While the offsets are enabled, the VERTICAL POSITION control will still position all channels together,
with the offset amount remaining constant. When
OFFSET is turned off, the input channels will be
re-aligned. The selected offset amount will be
recalled the next time OFFSET is enabled.
H
When A2A3 OFFSET is on, the center and right bezel
controls are assigned to CH A2 and CH A3 offsets.
On-screen labels appear just above each control.
Turning these controls will offset the CH A2 and CH
A3 signals with respect to CH A1. When B2B3 offset
is on, the same two controls are assigned to CH B2
and CH B3.
H
When both A2A3 and B2B3 offsets are on, the user
assigns the controls to either A or B offsets. The
CONTROL selection only appears when both A and B
OFFSETS are selected.
H
An offset will remain in effect until the user turns
the offset OFF. (Exiting the CONFIG menu will not
affect the OFFSET ON / OFF setting.)
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Using the Menus
CALIBRATE
These choices are offered when CALIBRATE is selected:
H
CAL SIG
— Turns the 1 V internal calibrator signal
on/off.
H
GAIN CAL
— Turns on the gain calibration adjust-
ment on/off.
Additional choices appear when CAL SIG or GAIN CAL is
turned on:
CAL SIG ON
H
In waveform mode, the user can set the calibrator
frequency to 100 KHZ or to FSC OSC (FSC OSC =
3.58 MHz for NTSC/4.43 MHz for PAL). Dual-standard monitors also have the option of choosing
NTSC FSC (3.58 MHz) or PAL FSC (4.43 MHz).
H
In vector mode, the user can set the calibrator
frequency, for dual-standard instruments only, to
NTSC FSC (3.58 MHz) or PAL FSC (4.43 MHz).
H
In both waveform and vector modes, selecting NTSC
FSC or PAL FSC temporarily switches the instrument
to the appropriate video standard. The standard is
restored when changing the selection or when
exiting the CALIBRATE menu.
GAIN CAL ON
H
In waveform mode, the left bezel control adjusts
instrument vertical gain (V CAL) and the center bezel
control adjusts instrument horizontal gain (H CAL).
Once gain has been adjusted, two reset options
appear on screen. If either of these resets is selected, a box flashes momentarily around the onscreen label to acknowledge that reset has occurred.
RESET VCAL cancels any vertical gain adjustments
3-24
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Using the Menus
and RESET VCAL cancels any vertical gain adjustments; the instrument returns to the factory calibrated gain settings.
H
In vector mode, the center bezel control adjusts the
vector signal gain. Once gain has been adjusted,
RESET VCAL appears on screen. Selecting RESET
VCAL cancels any vector gain adjustments and
returns the instrument to the factory calibrated gain
settings.
REMOTE
H
The currently operating software version is displayed in the lower right corner of the screen.
H
Three menu choices are available. REM INPUT
configures rear-panel REMOTE connector pin 3 to
accept External Horizontal or Staircase input.
STAIRCASE configures the staircase input for 3-step
(RGB) or 4-step (YRGB) signal. BAUD configures the
data transmission rate for the rear-panel RS232
connector for 1200, 4800, or 9600 baud.
H
The remote input is enabled by a TTL low or switch
to ground. See page 3-29.
REFERENCE (1765 Only)
H
NTSC external reference and PAL external reference can be set to EXT, A, A1, A2, A3, B, B1, B2,
or B3.
H
When The front-panel REF EXT is selected (LED
lights) the instrument uses the rear-panel EXT REF
input. Dual-standard monitors can be configured for
two external references; one for NTSC and one for
PAL. Any of the input channels can be designated
as a second external reference by selecting that input
channel as the NTSC EXT REF or PAL EXT REF
through this menu.
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Using the Menus
H
If NTSC and PAL external references are configured
the same, the monitor automatically operates in the
same television standard as the EXT REF input.
When NTSC and PAL external references are
configured differently, the monitor’s operating
standard is determined by the standard of the displayed video instead of the EXT REF input. Once the
operating standard is determined, the monitor
immediately switches to the appropriate input for
reference timing.
Gain Menu
3-26
H
Any one of three calibrated gain ratios can be selected:
X1, X5, or X10. Variable gain is also available, independent of the other gain settings. When variable gain is on,
the left bezel control adjusts signal gain.
H
In Lightning mode, the three calibrated gain ratios are
available, as well as two independent variable gain
settings. VAR V GAIN adjusts the gain of the vertical
portion of the signal and VAR H GAIN adjusts the gain of
the horizontal portion.
H
Audio or Time Code gain is set when AUDIO or TIME
CODE display is selected. Gain choices are 0 dBu, 4
dBu, 8 dBu, or 12 dBu.
H
When variable gain is turned off, the instrument returns
to the calibrated gain setting. Operator adjustments
made with variable gain will be restored when variable
gain is selected again.
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Using the Menus
CRT Menu
The following choices are available:
H
DISPLAY is used for signal and etched graticule adjustments. When DISPLAY is selected, the left bezel control
adjusts the signal focus (FOCUS), the center bezel
control adjusts the etched graticule illumination (SCALE)
and the right bezel control adjusts the signal intensity
(INTENSITY).
H
READOUT refers to electronic graticules, markers, menu
and measurement readouts. When READOUT is selected,
a test pattern containing a vertical line and a horizontal
line is displayed. Use the left bezel control (VPOS) and
the center bezel control (HPOS) until the lines cross at
the center of the etched graticule. This will compensate
for minor shifting of markers due to drift or external
magnetic fields (particularly if the instrument is moved
after the markers are set).
The right bezel control adjusts readout intensity (INTENSITY). Readout intensity will not go below the calibrated
minimum value when menus are displayed.
H
TRACE adjusts trace rotation
Exiting the menu will return the instrument to normal operation, with the new settings in effect.
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Using the Menus
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Remote Operation
The 25-pin rear-panel REMOTE connector is a subminiature
D-type connector. It accepts the input for RGB/YRGB staircase, external horizontal, remote sync external blanking, time
code, and Left and Right audio. TTL signal or ground closure to designated pins will enable Staircase, External Horizontal, or Remote Sync displays.
When Remote Sync is enabled, the on-screen TIME/DIV. readout is not present. When Remote Sync or External Horizontal is enabled with timing cursors, “UNCAL” is displayed in
place of a quantitative readout.
The REMOTE connector is configured for Staircase (RGB or
YRGB) or External Horizontal input through the CONFIGURE
menu, shown on page 3-20.
The user can store and recall up to eight front-panel setups
through the remote. Remote connector pin assignments and
an operational description begin on page B-1.
Using Presets through the Remote
The 1760-- Series has 10 presets capable of storing front-panel
setups. Presets one through eight are accessible through the
rear-panel REMOTE connector. A TTL low or ground closure
on one of the PRESET pins selects the front-panel setup stored
at that preset location.
When STORE (pin 25) is grounded along with one of the preset pins, the current front-panel setup is stored at the selected
preset location.
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Remote Operation
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Making
Measurements
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Basic Measurements
Basic Measurements contains 1760-- Series graticule descriptions, followed by specific measurement procedures.
This monitor uses an internal graticule, which combines waveform and vector markings. The internal graticule scales
are on the same plane as the CRT phosphor, eliminating parallax errors. Graticule illumination can be adjusted through
the CRT menu (page 3-27) to provide optimum brightness for
viewing or photographing displays.
Waveform Graticule
There are three versions of the waveform graticule, illustrated in Figure 4-1, Figure 4-2, and Figure 4-3:
H
NTSC composite video graticule (1760).
H
CCIR composite graticule (1761).
H
Dual standard graticule (1765).
Horizontal Scale
The 0 IRE (0.3V) graticule line is divided into 12 major divisions. Each division represents a unit of time determined by
the SWEEP and MAG settings. Line sweep rates are as follows:
MAG ON
SWEEP
TIME/DIV
1 LINE SWEEP
5 µS/Div
200 nS/Div
2 LINE SWEEP
10 µS/Div
1 µS/Div
In 2 FIELD SWEEP with MAG ON, the entire vertical interval
can be viewed.
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Basic Measurements
NTSC Vertical Scales
The NTSC graticule is shown in Figure 4-1. The left side of
the graticule is scaled in IRE units and extends from - 50 to
+120 IRE in 10 IRE increments. A mV scale has been added
to the right side of the NTSC graticule to facilitate component measurements.
Black level setup is denoted by a dashed line at 7.5 IRE.
There are ± 2 IRE and ± 4 IRE markings at the center of the
- 40 IRE line to assist in measuring sync amplitude. This
scale is designed for use with two line or two field sweep
rates.
The graticules are also marked for K-- Factor tolerances and
linear-distortion measurements. These measurements will be
described later in this section.
Audio
K Factor
100% White
Level
75% White
Level
Baseline
Setup
Figure 4-1.
4-2
Sync Tip
NTSC waveform/vector graticule.
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Basic Measurements
PAL Vertical Scale
The PAL graticule is shown in Figure 4-2. On the left side of
the PAL graticule is a voltage scale that extends from 0 to
1.2 V. The graticules are also marked for K-- Factor tolerances and linear-distortion measurements. These measurements will be described later in this section.
Component signals can be centered on the .35 V line.
Audio
K Factor
100% White
Level
Baseline
Sync Tip
Figure 4-2.
PAL waveform/vector graticule.
Dual-Standard Vertical Scale
The dual-standard graticule, shown in Figure 4-3, combines
the two previous scales. The 525/60 scale (NTSC) is on the
left side, and the 625/50 scale (PAL) is on the right. The
divisions represent 10 IRE in amplitude (70 mV for PAL).
The instrument gain is automatically adjusted for the partic-
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Basic Measurements
ular standard used. On-screen arrows point to the graticule
scale (left side or right side) that is calibrated for the present
operating mode, as defined in Table 4-- 1.
Table 4 ---1. Dual-Standard Graticule Scales
APPLICABLE GRATICULE SCALE
COMPONENT
FORMAT
525/60
STANDARD
625/50
STANDARD
GBR
Left
Right
SMPTE
Right
Right
BETA
Left
Right
MII
Right
Right
Audio
K Factor
100% White
Level
75% White
Level
Baseline
Setup
Sync Tip
IRE Scale
Figure 4-3.
4-4
Volt Scale
Dual Standard waveform/vector graticule.
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Basic Measurements
Making Waveform Measurements
Horizontal Sync Amplitude
The vertical scale at sync tip (40 IRE NTSC or - 0.3 V PAL)
provides ±2 and ±4 IRE (± 2 and ±4 mV) for measuring sync
amplitude. Align the blanking level of a centered two-line
waveform display on the graticule baseline to place the sync
pulse directly over this structure. Measure sync amplitude
directly from the graticule, or use the voltage cursors.
Peak White
With the blanking signal level on the graticule baseline, the
amplitude of the 100% white reference of a color bar should
be on the 100 IRE (1 V) graticule line. With a 2 LINE sweep
rate, use the HORIZ POS control to place the white reference
directly over the amplitude scale at graticule center. The
vertical markings there correspond to 2 IRE/division (10 mV/
division for PAL). Measure peak white directly from the
graticule or use the voltage cursors.
K-Factor Measurements
The boxed area in the upper left corner of the graticule is
scaled for 2% and 4% K-- Factor ratings for precise tilt measurements. This structure is designed to work with an 8 µs
half-amplitude duration (HAD) bar. The bar tilt measurement structure can also be used to measure pulse-to-bar ratio.
Calibrated X5 GAIN can be used while making these measurements; it increases resolution to 0.4% and 0.8%.
To use the NTSC vertical scale to make line-time distortion
and pulse-to-bar ratio measurements, position the signal
blanking level to the graticule baseline. Next, position the
center of the composite test signal bar to the center of the 2T
bar measurement box and check to see if insertion gain is
unity. If it is not, adjust the VARIABLE GAIN (enabled from the
GAIN MENU) for exactly 100 IRE (700 mV PAL) of signal
amplitude from baseline to the middle of the white bar.
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Basic Measurements
To measure the K-- Factor line-time distortion, measure the
largest deviation of the bar top (tilt or rounding) within the
structure. The solid outer box equals a 4% K-- Factor, while
the dashed line inner box equals a 2% K-- Factor. For signals
with a bar half-amplitude duration that exceeds 18 s (8 s
PAL), measure the bar top in increments by positioning the
bar to the left or right of the leading or trailing edge. The
first and last 1 s of the bar should be disregarded.
Pulse-to-bar K-- Factor measurements are made by normalizing bar amplitude (100 IRE or 1V) and adjusting the HORIZ
POS control to position the pulse on the line-time distortion
structure. Use the VAR GAIN (see CONFIG—GAIN menu, page
3-26) to adjust signal amplitude.
Make sure that the center of the bar is at 100 IRE (1 Volt
PAL) when blanking level is at 0 IRE (use VARIABLE GAIN to
adjust gain, if necessary). Use the HORIZ POS control to
place the 2T pulse over the center of the boxed measurement
area and measure its amplitude. When the top of the pulse
falls within the dashed lines, the K-- Factor equals 2% or less.
Vector Graticule
The VECTOR display permits measurements of hue in terms
of the relative phase of the chrominance signal with respect
to the color burst. Relative amplitude of chrominance to
burst is expressed in terms of the displacement from center
(radial dimension of amplitude).
The vector graticule is combined with the waveform graticule.
The NTSC and PAL vector graticules contain burst and vector targets; the dual-standard graticules contain burst and
vector targets for both NTSC and PAL standards. The vector
targets can be used with either 75% or 100% amplitude color
bar signals. The selection is made through the CONFIG—VECTOR menu, described on page 3-21.
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Basic Measurements
NTSC
The chrominance vectors terminate in a system of graticule
targets consisting of two boxes (a small box inside a large
box). A sample target is shown in Figure 4-4. The dimensions of the large boxes represent ±10° centered on the exact chrominance phase, and ±20% of chrominance
amplitude centered around standard amplitude. The dimensions of the smaller boxes represent ±2.5° and ±2.5 IRE.
R
°
°
°
°
°
°
°
°
Figure 4-4.
Vector targets --- NTSC values (PAL values in parentheses).
PAL
For the 1761 graticule, each PAL chrominance vector related
to the +V burst terminates in targets consisting of two boxes
(a small box inside a large box). See Figure 4-2. The large
box represents ±10° centered on the exact chrominance
phase and ±20% of chrominance amplitude centered around
standard amplitude. The dimensions of the inner target represent ±3° and ±5% of chrominance amplitude; the vectors
associated with the - V burst terminate in the smaller targets.
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Basic Measurements
Dual-Standard
The 1765 graticule is a composite of the PAL and NTSC
graticules. There are two inner targets within the larger target; the PAL target, and the NTSC target. The NTSC target
is inside the PAL target.
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Basic Measurements
Making Vector Measurements
Chroma Bandwidth
The horizontal and vertical axes of the vector graticule contain markings for checking chroma bandwidth. A subcarrier
frequency sine wave (whose amplitude places it on the outer
compass rose) is used as a reference. When the frequency is
changed, the diameter of the circle should reduce. At a point
equal to 70.7% of full amplitude (-- 3 dB), there are gaps in
the horizontal and vertical axes. This calibration aid makes
it possible to check the - 3 dB points of the demodulator output amplifiers.
Differential Phase and Gain
Differential gain (dG) and differential phase (d∅) measurements use the graticule markings located at the outer edge of
the B-- Y or U axis. See Figure 4-5.
10 o dφ
2°dφ
Figure 4-5.
Differential gain and phase measurements.
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Basic Measurements
Making SC/H Phase Measurements
(Option SC Only)
The SC/H display provides a vector display of the subcarrierto-horizontal-sync phase relationship. The burst vector and
the phase of the 50% point of the leading edge of sync are
displayed.
NTSC
Dual-Dot Display
When REF is set to internal, the 1760 has a dual-dot SC/H
display (Figure 4-6). The dots represent the 50% points of
horizontal sync.
To make a measurement, align the burst vector as shown in
Figure 4-6. The location of the horizontal sync dot is the
SC/H phase of the signal. With the dual dots, SC/H phase
range is limited to 180°, because the SC/H phase of a single
signal referenced to itself can only vary ±90°. At 180°, the
video signal again has a + field subcarrier phase sequence,
making it “SC/H phased.”
Single-Dot Display
When REF is set to EXT, the 1760 has a single-dot display
(Figure 4-7). This relative mode allows the comparison of
two signals, the selected INPUT and EXT REF. The phase shift
between the two subcarriers can extend from 0° to 360°
A dot near 0° (relative to burst) indicates the input is perfectly SC/H-phased with the EXT REF input, and that the color
frames are properly matched. A phase reading of 180° indicates that the INPUT and EXT REF color frames are not properly matched.
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Basic Measurements
Sync Dot
Burst Vector
0° Axis
Sync Dot
Relative angle indicates
degree of SC/H phase.
VECTOR PHASE
Figure 4-6.
NTSC dual-dot SC/H display.
Burst Vector
0° Axis
Sync Dot
VECTOR PHASE
Figure 4-7.
NTSC single-dot SC/H display.
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Basic Measurements
PAL
The 1761 uses a series of dots around the compass rose with
a single dot in a blanked area to denote sync (see Figure 4-8).
Place the burst vector at 0°, align the burst vectors with the
graticule markings, and read the SC/H phase error as the
amount of sync dot offset from the the horizontal axis. The
input signal and the the EXT REF signal are properly color
framed when the sync dot is within 90° of the burst vector.
VECTOR PHASE
Figure 4-8.
PAL SC/H display.
SC/H R ---Y
SC/H phase can be viewed over a frame of video. Select
WAVEFORM display and FIELD sweep. Enter the FILTER menu
and select SC/H R---Y. For NTSC, stable SC/H is a horizontal
line as shown in Figure 4-10. (Figure 4-9 shows the same
display with a LINE sweep selected.) A sample SC/H phase
error is shown in Figure 4-11. The flat lines indicate that
SC/H phase is stable over the entire frame. For PAL, SC/H is
a sine wave resulting from the 25 Hz offset (Figure 4-12).
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Basic Measurements
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
Burst
Horizontal Sync
VECTOR PHASE
Figure 4-9.
Two-Line SC/H R ---Y display (NTSC), with proper SC/H phase.
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
VECTOR PHASE
Figure 4-10. Two-Field SC/H R ---Y display (NTSC), showing proper SC/H phase.
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Basic Measurements
VECTOR PHASE
Figure 4-11. Two-Field SC/H R ---Y display (NTSC), showing approximate 10°
phase error.
FLAT
LUM
CHROM
DIFF
R-- Y
SCH R-- Y
F+L
F+L+C
VECTOR PHASE
Figure 4-12. Two-Field SC/H R ---Y display (PAL), showing proper SC/H phase.
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Basic Measurements
Making Audio Measurements
An audio signal with no phase error appears as a straight line
extending from the audio box in the upper right corner of the
graticule to the box in the lower left. A signal with phase
error appears as an opening in a Lissajous waveform.
Figure 4-13 shows three audio input signals that are equal in
amplitude, but have different phase relationships.
Audio gain is set from the GAIN MENU when AUDIO display is
selected. Gain choices are 0 dBu, 4 dBu, 8 dBu, or 12 dBu.
Select gain relative to the system under test.
a. Correct Phase
b. Phase Error of 180°
c. Phase Error of approximately 30°
Figure 4-13. Audio displays.
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Basic Measurements
Lightning Measurements
The Lightning display gives indication of absolute and relative amplitudes and relative timing of the three components.
For a Lightning display, apply color-difference signals (Y, PB
and PR) to the rear panel CH-A1, A2, and A3 (or CH-B1, B2,
and B3) connectors. Push the front-panel LIGHTNING button.
The instrument is forced to A123 input display (it can be
changed to B123).
Use the CONFIG—FORMAT menu (page 3-21) to set DISPLAY
to LIGHTNING, and select the appropriate format for your
system. Lightning is most useful in the color difference formats: SMPTE, EBU, BETA, and MII. (Selecting GBR will provide a square display.) Use the CONFIG—VECTOR menu to
select 75% or 100% bars. This will change the size of the
electronic graticule to accommodate the input signal. Push
CLEAR MENU to clear the menu readout.
Channel 2 is compared to Channel 1 in the top half of the
display; Channel 3 is compared to Channel 1 in the lower
half. (See Figure 4-14.)
525/60
White
Y
L
C
G
M
R
B
Setup
Black
B
C
R
G
M
Y
L
White
Figure 4-14. Lightning display showing correct timing.
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Basic Measurements
For better viewing of Lightning displays, the GAIN menu and
X5 can be selected. Press CLEAR MENU to clear the GAIN
menu readout. Since the graticule is electronically generated, the calibration is not altered by X5 gain. Use the Vertical Position control to view the entire display. When X5 gain
is no longer desired, select the GAIN menu again, and set gain
to X1. To exit, push GAIN menu again, or push CLEAR MENU.
Amplitude Measurements
With color-difference formats, luminance increases from the
bright dot in the center of the graticule; it plots upward in the
upper half of the screen, and downward in the lower half.
The color-difference or chroma amplitude is the horizontal
deflection away from the luminance axis. A purely monochrome signal is indicated by a vertical line along the luminance axis. Check that the signal appears within the targets
of the electronic graticule. If it is too close to the center dot,
it is too small; too far away, it is too large.
Encoder Accuracy
The Lightning display allows the operator to check encoder
accuracy by viewing the relative amplitudes of luminance
and color difference signals in one display.
Timing
Lightning can also be used for evaluating interchannel timing. One input signal used for this display is a color bar that
is compatible with the Lightning graticule. Note the row of
graticule dots between the Green and Magenta boxes in both
the upper and lower halves of the Lightning display. If the
signal trace passes through the center dot of this row in each
half of the display, the interchannel timing is correct.
The modulated sin2 pulse can also be used to check for timing errors using the Lightning display. When inter-channel
timing is correct, a straight line is seen. An ellipse indicates
a timing error. Due to lower bandwidth amplifiers this signal
has less noise obstructing the display than the Bowtie method
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Basic Measurements
of checking timing. The signal source can be adjusted until
the ellipse disappears, providing a very accurate method of
correcting timing errors.
Timing errors are indicated by the trace moving away from
the center timing dot. See Figure 4-15. For wide-band (≥1.5
MHz) component formats, the smaller spacings of dots represent approximately 40 ns of error; the larger spacing represents 80 ns. The timing dots represent proportionally larger
errors for lower bandwidth signals.
For signals decoded from composite (bandwidth of approximately 500 kHz), the timing dots represent approximately
120 and 240 ns, respectively. The transitions will be “S”
shaped due to the narrow-band color difference signals. Note
that correct timing is always indicated by a transition through
the center dot, regardless of the signal bandwidth.
If a trace appears “bent” toward the center of the display,
delay of the color difference signal is indicated. “Bending”
away from center indicates an advance of the color difference signal relative to luminance.
Y
L
C
G
M
R
Approximate 80 ns
delay of Channel 2.
C
B
B
R
G
M
Y
L
Figure 4-15. Lightning display showing delay.
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Basic Measurements
Using the Diamond Display
The 1760-- Series internally transcodes the color-difference
formats to GBR for the Diamond display. This display allows easy evaluation of the GBR signal for gamut limit
violations.
To obtain a DIAMOND display, input a GBR signal through
the rear panel CH-A1, A2, and A3 (or CH-B1, B2, and B3)
connectors. Push the LIGHTNING button. The instrument is
forced to a component display (A123 or B123 input). Use
the CONFIG—FORMAT menu to select the DIAMOND display.
(See Figure 4-16.) Push CLEAR MENU to clear the menu
readout.
DISPLAY
LIGHTNING
DIAMOND
G
B
G
R
Figure 4-16. Diamond display showing signal inside gamut limits.
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Basic Measurements
NOTE
A valid GBR signal is guaranteed if the signal is
within the Diamond graticule. However, this does
not guarantee that the signal will be within appropriate composite limits if encoded into composite NTSC.
Signals outside the diamonds are subject to reproductive errors in any format.
The graticule is labeled with G, B, and R to determine the
color problem in a GBR sense. A bright excursion outside
the graticule indicates an invalid signal, subject to clipping or
inconsistent reproductions. An already clipped or limited
signal is indicated by a bright line along or parallel to the
Diamond graticule.
All colored areas (the bigger the area, the brighter the dot)
are represented by data in both top and bottom diamonds. A
perfectly monochrome signal would produce a vertical line
with luminance proportional to the vertical deflection increasing upwards in the top diamond and downwards in the
bottom diamond. Increasing color saturation is indicated by
increasing horizontal deflection around the appropriate luminance value (vertical deflection) in the top, bottom, or both
diamonds.
In computer graphics and film-to-tape applications, the Diamond display can be used to check for gamut limit errors
anywhere the signal might be adjusted to create improper
GBR signals. The Diamond display monitors the actual electrical signal, indicating faults in the transcoding hardware as
well as operator artistic violations.
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Basic Measurements
Using the Bowtie Display
When used with the Bowtie signal, the Bowtie display is a
high-resolution timing indicator.
Route a Bowtie test signal from the generator, through the
equipment under test, and connect to the 1760-- Series rearpanel CH-A1, A2, and A3 connectors. Use caution when
deciding where the Bowtie signal is routed; when transcoded
to GBR or encoded to composite, it produces and illegal signal with potential unwanted side effects.
For a Bowtie display, push the 1760-- Series front-panel BOWTIE button. A two-line display of component signals will be
present: line one (left half of display) shows CH-1 minus
CH-2 and line two shows CH-1 minus CH-3. See
Figure 4-17.
If the bowtie patterns have a sharp null, and the null is located in the center of each line, both timing and relative amplitudes are correct. Relative amplitude errors will decrease
the depth of the null. Interchannel timing errors will move
the position of the null.
Figure 4-17. Bowtie display showing a sharp null.
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Basic Measurements
The Bowtie test signal consists of a 500 kHz sine wave on
Channel 1 and 502 kHz sine waves of the same amplitude on
Channels 2 and 3. The Channel 2 and 3 waveforms are generated to be exactly in phase with the Channel 1 signal in the
center of the line. The 1760-- Series subtracts Channel 2 from
Channel 1 to make the left half of the display, and Channel 3
from Channel 1 for the right half. The 2kHz frequency offset
between luminance and the difference channels causes the
relative phase to change constantly. The subtraction process
is complete (resulting in zero) only when the two components are exactly in phase.
Changes of relative timing change the point at which the null
occurs by changing relative phase between the two channels.
If the amplitudes are not equal, the subtraction never yields
zero and the null is broadened.
The Lightning and Diamond displays provide a high resolution indicator of proper timing when used with the Bowtie
signal. A spiral ellipse is displayed and the width of the ellipse reaches its minimum as timing is adjusted to the optimum setting. It is not necessary to adjust the relative
amplitudes to see the minimum ellipse.
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Basic Measurements
Time Code Display
Linear Time Code, also known as Longitudinal Time Code
(LTC), is an 80-bit signal with information which makes it
possible to accurately identify an individual frame of recorded video. LTC is typically recorded on an unused audio
track. The 1760-- Series monitor provides a voltage-versustime display of the Time Code waveform, which can be used
to check for the following problems:
H
No signal.
H
Sync word in the wrong position (improper
Time Code-to-Video sync).
H
Low amplitude or noisy time code signal.
To display the Time Code signal on the monitor, connect the
video signal containing LTC to the rear-panel REMOTE
connector as follows: pin 12 (+ input), pin 13 (-- input), and
pin 14 (ground). Push the front-panel TIME CODE button.
The display should be a stable square wave.
Sync Word
The trigger point is FIELD 1 of the applied video waveform—either internal or external reference. When synchronized to video, the display is stable. The sync word should
appear on the right. If it is missing, drifting, or in another
position, there is a problem with the Time Code-to-Video
synchronization.
Amplitude
Time code gain is set from the GAIN MENU when TIME CODE
display is selected. Gain choices are 0 dBu, 4 dBu, 8 dBu, or
12 dBu. Select gain relative to the system under test. If the
waveform monitor display amplitude is much less than would
be expected for the given input, a problem may exist with the
Time Code level.
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Basic Measurements
4-24
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Calibration
Instrument gain may require readjustment for special monitoring applications. To prevent erroneous measurements,
gain should be adjusted only by qualified personnel. Normal
instrument calibration, performance verification, and service
maintenance are covered in the service manual, which will
be published as a separate volume.
Adjusting Instrument Gain
Instrument gain can be adjusted through the CONFIG—CALIBRATE menu. CONFIG menu is described on page 3-20.
Set Vertical Gain
1.
To adjust vertical gain, select WAVEFORM display mode
and push the CONFIG menu button. Select CALIBRATE,
then CAL SIG ON and GAIN CAL ON.
a.
Turn the V CAL control until the signal amplitude is
140.0 IRE (1000 mV for PAL), as read on the
graticule. This adjustment may be made with the
internal calibrator (CAL SIG) or an applied reference
signal.
b.
Pushing RESET V CAL will cancel any gain adjustment and reinstate the factory gain setting.
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Calibration
Set Horizontal Gain
1.
To set horizontal gain, push the CONFIG menu button.
Select CALIBRATE, then CAL SIG ON and 100 KHZ. Select
GAIN CAL ON.
a.
In 1 LINE SWEEP (5 µs/div), adjust the HORIZ CAL
control for one-half cycle per major graticule
division; in 2 LINE SWEEP (10 µs/div), adjust for one
full cycle per major division.
b.
Pushing RESET H CAL will cancel any gain adjustment and reinstate the factory gain setting.
Set Vector Gain
1.
4-26
To adjust vector gain, select VECTOR display mode and
push the CONFIG menu button. Select CALIBRATE, then
CAL SIG ON and GAIN CAL ON.
a.
Adjust VECTOR CAL so that the calibration signal
circle falls on the compass rose (outer ring).
b.
Pushing RESET V CAL will cancel any gain adjustment and reinstate the factory gain setting.
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Appendices
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Appendix A
Performance Specification
The specification tables use the following abbreviations.
Performance Requirement (Req). All performance requirements in the specification tables are identified with Req, and can be
assured by completing the Performance Check Procedure (1740A/
1750A/1760-- Series Service Manual.) Allow a warm-up time of 20
minutes.
Performance requirements in the electrical specifications are valid over an
ambient temperature range of +20° C to +30° C. The Performance Requirement tolerances listed in the Electrical Specification are doubled over
the temperature range of 0° C to +50° C, unless otherwise specified. Test
equipment used to verify Performance Requirements must be calibrated
and working within the limits specified in the Service Manual Equipment
Required List.
Reference Information. Information that amplifies a performance
requirement or is of special importance is indicated by RI. There is no
need to check these items to a specific tolerance.
Reliability
Mean Time Between Failure (MTBF)
The demonstrated MTBF goal is 40637 hours MTBF at 25° C ambient,
which will be monitored from field failure reports.
Mean Time to Repair (MTTR)
The projected MTTR is 1 hour.
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Appendix A: Performance Specification
Electrical Specifications
Table A- 1: Waveform Vertical Deflection
CATEGORY
DESCRIPTION
Deflection Factor
Req: 1 V full scale (X1): 1 volt input displayed with-
in 1% of 140 IRE (1.00 V PAL)
X5 Gain: 0.2 volt input displayed within
1% of 140 IRE (1.00 V PAL)
X10 Gain: 0.1 volt input displayed within 1%
of 140 IRE (1.00 V PAL)
RI:
Any one of the 8 inputs
Variable Gain Range
Req: 0.2X to 1.4X
Overscan
Req: ≤1% variation in baseline of chroma when
positioned anywhere between sync tip and
100% white
RI:
X1, X5, or X10 with any variable gain
setting
Video Maximum Operating
Input Voltage
RI:
--1.8 V to +2.2 V, (all inputs, A -- B3) dc
+ peak ac
Absolute Video Input Voltage
RI:
--8.5 V to +8.5 V (dc + peak ac)
Video Input DC Impedance
RI:
≥20kΩ
Video Input Return Loss
RI:
Typically ≥40 dB to 6 MHz
Video Input DC Offset
Between Channels
Req: ≤1 IRE (7 mV PAL)
RI:
Typically ≤1 mV
Video Input Offset Range
RI:
CHA2, A3, B2, & B3 can be offset from
CHA1 or CHB1 by ±350 mV.
Video Input Loop-Through
Isolation
RI:
Typically ≥70 dB
A-2
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Appendix A: Performance Specification
Table A- 1: Waveform Vertical Deflection (Cont.)
CATEGORY
DESCRIPTION
Video Input Crosstalk Between
Channels
Frequency Response (Flat)
RI:
Typically ≥60 dB
Req: ±2% to 10 MHz (X1 Gain) ±4% to 10 MHz
(X5 and X10 Gain), on screen signal (0.2 V or
0.1 V)
RI:
Luminance Filter Gain
All inputs ac or dc coupling
Req: 1 ±1%
RI:
Reference is FLAT at 50 kHz.
Luminance Filter Response
Req: ≤3 dB attenuation at 1 MHz
Luminance Filter Chrominance
Rejection (1765 only)
Req: ≥34 dB
Chrominance Filter Gain
Req: 1 ±1%
≥40 dB attenuation at FSC
RI:
Chrominance Filter Bandwidth
Ref. is flat at FSC (3.58 or 4.43 MHz).
Req: 1.5 MHz ±0.3 MHz
RI:
Centered at FSC. Passband is typically
FSC + and -- 750 kHz.
Chrominance Filter
Attenuation at 2X FSC
RI:
≥25 dB
Differentiated Step Filter
Attenuation at 2X FSC
RI:
≥40 dB
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Appendix A: Performance Specification
Table A- 1: Waveform Vertical Deflection (Cont.)
CATEGORY
DESCRIPTION
Transient Response
Req: Pulse-to-Bar Ratio 0.99:1 to 1.01:1
RI:
Preshoot ≤1%
RI:
Overshoot ≤1%
RI:
Ringing ≤1%
Req: Field-Rate Tilt ≤1%
Req: Line-Rate Tilt ≤1%
RI:
Differential Gain ≤1%
Pix Out Gain
Req: 1±3%
Pix Out Frequency Response
Req: ±3% to 6 MHz
Pix Out Differential Gain
RI:
≤1%
Pix Out Differential Phase
RI:
≤1°
Pix Out Output Impedance
RI:
75Ω
Req: ≥ 30 dB to 6 MHz
Pix Out Return Loss
Pix Out Line Select Strobe
DC Restorer 60 Hz (50 Hz)
Attenuation
RI:
Req: Slow Mode ≤10%
Fast Mode ≥95%
RI:
DC Restorer Offset Error
Fast Settling Time
Blanking Shift with 10 to 90%
APL Change
A-4
A dc offset is added to output in line select to bright up the selected line or lines.
Back porch or sync tip clamp point is
selected through menu.
Req: ≤1 IRE (7 mV PAL)
RI:
Typically 3 mV
RI:
≤6 video lines
Req: ≤1 IRE (7 mV PAL)
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Appendix A: Performance Specification
Table A- 1: Waveform Vertical Deflection (Cont.)
CATEGORY
DESCRIPTION
Blanking Shift with Presence
and Absence of Burst
Req: ≤1 IRE (7 mV PAL)
RI:
Typically 3 mV
Table A- 2: External Reference
CATEGORY
DESCRIPTION
Input
RI:
Composite video or black burst
Maximum Operating Input
Voltage
RI:
--1.8 V to +2.2 V, dc + peak ac
Absolute Maximum Input
Voltage
RI:
--8.5 V to +8.5 V, dc + peak ac
DC Input Impedance
RI:
≥20 kΩ
Return Loss
RI:
Typically ≥40 dB to 6 MHz
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Appendix A: Performance Specification
Table A- 3: Waveform Horizontal Deflection
CATEGORY
DESCRIPTION
Sweep
Req: Synchronization: Sweep triggered by horizon-
tal and vertical sync pulses
Sweep Timing Accuracy
RI:
Sweep Length: ≈12 divisions
RI:
Sweep freeruns without input
Req: 1 Line: 5 s/division ±1%
2 Line: 10 s/division ±1%
RI:
1 Field displays one full field,
including field rate sync.
2 Field displays two full fields and
the field rate sync between them.
Sweep Linearity
Req: 1 Line: ±1%
Magnified Sweep Accuracy
Req: 1 Line: 0.2 s/division ±1%
Magnified Sweep Linearity
Req: 1 Line: ±1%
Horizontal Position Range
Req: Any portion of the synchronized sweep can be
2 Line: ±1%
2 Line: 1.0 s/division ±1%
2 Line: ±1%
positioned on screen in all sweep modes.
External Horizontal Input
Remote Sync
A-6
Req: 2 divisions/volt, ±2%
RI:
Menu is selected and enabled by REMOTE connector ground closure.
RI:
Input Amplitude: TTL level
RI:
Frequency: 25 Hz to 100 Hz positive
edge-triggered sweep
RI:
Enabling Signal: TTL low or ground
closure
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Appendix A: Performance Specification
Table A- 4: Measurement Cursors
CATEGORY
DESCRIPTION
Waveform Accuracy
Req: Voltage: 0.5%
Timing: 0.5%, for line-rate sweeps
RI:
Vector Accuracy
Typically 0.5% for field-rate sweeps
Req: Gain: ±1.5%
Phase: ±1°
RI:
Measured with respect to the Color
Bar signal
Table A- 5: RGB/YRGB
CATEGORY
DESCRIPTION
RGB/YRGB
Req: Staircase input gain: 0.8 V/division ±10%
RI:
RGB Sweep Length:
1 Field ≈ 30% of normal
1 Line ≈ 30% of normal
RI:
YRGB Sweep Length:
1 Field ≈ 25% of normal
1 Line ≈ 25% of normal
RI:
Maximum staircase operating signal: DC
signal plus peakacnotto exceed --12 V to
+12 V. Line- or field-rate sweep.
RI:
Peak-to-peak acsignal not to exceed
12 V.
RI:
Sweep Repetition Rate: Field- or linerate of displayed video or external
sync signal as selected by the frontpanel sweep selection
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Appendix A: Performance Specification
Table A- 6: Calibrator
CATEGORY
DESCRIPTION
Waveform Square Wave
Req: Amplitude: 1.0 V ±0.5%
Req: Frequency: 100 kHz ±0.1%
RI:
Crystal controlled 10 s square wave
Req: Amplitude: 1.0 Vp-p, ±1%
Waveform Sine Wave
RI:
Vector Circle
Circle that approximates the graticule
compass rose
Table A- 7: Vector Mode
CATEGORY
DESCRIPTION
Input Requirements
Req: 1 V p-- p ±6 dB
Nominal Subcarrier Frequency
(FSC)
Chrominance Processing Bandwidth (--3 dB)
RI:
Instrument freeruns with no input.
RI:
External Reference: Black burst or composite video
RI:
NTSC 3.579545 MHz
PAL 4.43361875 MHz
Req: 1 MHz ±200 kHz
RI:
PAL +V
V Axis is inverted at 1/2 video line
rate.
Display Phase Accuracy Error
Req: ≤1.25°
Display Gain Accuracy Error
Req: ≤2.5% with 75% amplitude color bars
Quadrature Phasing Error
Req: ≤0.5° (bursts set to targets)
Subcarrier Regenerator Pull-in
Range
Req: NTSC:
A-8
PAL:
±50 Hz
±10 Hz
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Appendix A: Performance Specification
Table A- 7: Vector Mode (Cont.)
CATEGORY
DESCRIPTION
Subcarrier Regenerator Pull-in
Time
RI:
≤2 seconds
Phase Shift with FSC Change
Req: NTSC:
Phase Shift with Burst
Amplitude Change of ±6 dB
Req: ≤ 2°
Phase Shift With Video Input
Channel Change
Req: ≤1°
Phase Shift With Variable Gain
Control +3 dB to --6 dB
Req: ≤0.5°
PAL:
RI:
RI:
Burst Jitter
Clamp Stability
≤2° (FSC to FSC ±50 Hz)
≤2° (FSC to FSC ±10 Hz)
With external reference selected.
Typically ≤0.5°.
≤0.5° rms
Req: ≤1/64 inch (0.4 mm)
RI:
Center spot movement with rotation of
the phase control
Phase Control Range
RI:
360° continuous rotation
Phase Control Quantization
RI:
≤0.2°
Position Control Range
Req: ≥0.236 inch (6 mm) from center
Differential Phase
Req: ≤1°
Differential Gain
Req: ≤1%
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Appendix A: Performance Specification
Table A- 8: Audio Mode
CATEGORY
DESCRIPTION
Input
RI:
DC coupled, differential input
Input Impedance
RI:
20 kΩ
Full Scale Selection
RI:
0, 4, 8, & 12 dBm full scale. Menu selected.
Full Scale Accuracy
Req: ±0.5 dB
Maximum Input Voltage
RI:
Measured at 1 kHz
RI:
±8 V peak
RI:
Measured to chassis ground
Bandwidth (--3 dB)
Req: --3 dB ≥200.0 kHz
X & Y Input Phase Matching
Req: ≤1°
RI:
Measured at 20 kHz
Table A- 9: Time Code
CATEGORY
DESCRIPTION
Input
RI:
Longitudinal Time Code. DC
coupled, differential input.
Input Impedance
RI:
20 kΩ
Input Amplitude
RI:
0, 4, 8, & 12 dBm full scale. Menu
selectable for 140 IRE (1.0 V) deflection.
Maximum Input Voltage
RI:
--10 V to +10 V peak
Bandwidth (--3 dB)
A-10
Req: ≥200.0 kHz
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Appendix A: Performance Specification
Table A- 10: SCH Phase Mode (OPT SC Only)
CATEGORY
DESCRIPTION
Absolute Accuracy
Req: ≤5°
RI:
Applies over a temperature range of
0 -- 50° C
RI:
Calibrated at 25° C. ±3 dB input
amplitude. Typically ≤5° with
±6 dB input amplitude.
Relative Accuracy
RI:
2°
Acquisition Time
RI:
≤1 Second
Displayed Phase Error Caused
by CRT Geometry Variations
RI:
±1.25°
Input Timing
RI:
Stable display with Video to External
Reference timing
Color Frame Range
RI:
±70° (Color frame correctly
identified when applied external reference signal is ≤70° of 0° SCH.)
Table A- 11: Component Vector Mode
CATEGORY
DESCRIPTION
Vertical Bandwidth
Req: --3 dB at ≥1.0 MHz
Horizontal to Vertical
Bandwidth Matching
Req: No eye opening at 500 kHz or 2 MHz
Vertical Gain Accuracy
Req: ±2.5%
RI:
Horizontal Gain Accuracy
With respect to graticule
Req: ±2.5%
RI:
With respect to graticule
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Appendix A: Performance Specification
Table A- 11: Component Vector Mode (Cont.)
CATEGORY
DESCRIPTION
Display to Graticule
Registration
Req: ≤0.25 box with the color bar black display dot
centered in target
RI:
Vector Display
Ch A2 or B2 is displayed on the horizontal axis and Ch A3 or B3 is displayed on
the vertical axis.
Table A- 12: Lightning Mode
CATEGORY
DESCRIPTION
Vertical Gain Accuracy
Req: ±2%
RI:
Horizontal Gain Accuracy
Electronic Graticule Display
With respect to electronic graticule
Req: ±2%
RI:
With respect to electronic graticule
RI:
Ch A1 or B1 is displayed vertically.
Ch A2 or B2 is displayed horizontally on
top half of display.
Ch A3 or B3 is displayed horizontally on
bottom half of display.
Table A- 13: Bowtie Mode
CATEGORY
DESCRIPTION
Common Mode Rejection
Ratio
Req: ≥34 dB at 3 MHz
Electronic Graticule Display
A-12
RI:
Timing error contributed by the
specification limit will be less than
0.6 ns.
RI:
Y minus PB (CH1-- CH2) is displayed on
the left half of the display.
Y minus PR (CH1-- CH3) is displayed on
the right half of the display.
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Appendix A: Performance Specification
Table A- 14: Transcoded GBR Outputs
CATEGORY
DESCRIPTION
Input Format
RI:
GBR, SMPTE, MII, or Betacam format;
selectable from a menu
Req: 1 ±3%
Accuracy
GBR Output Impedance
RI:
Typically <1%
RI:
No line select strobe on GBR outputs
RI:
Nominally 75Ω; back porch clamped to
0V
Table A- 15: CRT Display (PAL Values in Parentheses)
CATEGORY
DESCRIPTION
CRT Viewing Area
RI:
80 X 100 mm
Horizontal: 12.5 divisions
Vertical: 170 IRE (1.19 V)
Accelerating Potential
RI:
Nominally 13.75 kV
Trace Rotation Range
Graticule
Req: < + and --1° from horizontal
RI:
Total adjustment range is typically ≥8°.
RI:
Internal with variable illumination
Table A- 16: Power Source
CATEGORY
DESCRIPTION
Mains Voltage Range
Req: 90--250 V
RI:
Continuous range from 90 to 250 Vac
Mains Frequency
RI:
50 or 60 Hz
Power Consumption
RI:
110 VA (67 watts) maximum; 102 VA
(60 watts) typical
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Appendix A: Performance Specification
Table A- 17: Environmental Characteristics
CATEGORY
DESCRIPTION
Operating Temperature
Req: 0° to 50° C (+32° to 122° F)
Storage Temperature
Req: --40° to 75° C (--40° to 158° F)
Operating Altitude
Req: To 15,000 feet (4572 meters)
Storage Altitude
Req: To 50,000 feet (15,240 meters)
Vibration
Req: 5 minutes at 5 -- 15 Hz with 0.060 inch dis-
placement
5 minutes at 15 -- 25 Hz with 0.040 inch displacement
5 minutes at 25 -- 55 Hz with 0.020 inch displacement
Military Specification: Mil--T--28800D,
Paragraph 1.2.2, Class 3
Mechanical Shock
Req: Non Operating: 50 g’s 1/2 sine, 11 ms duration
3 shocks per surface (18 total)
Transportation
Req: Qualified under NSTA Test Procedure 1A,
Category II (24 inch drop)
Humidity
Req: Will operate at 95% relative humidity for up to
five days. Do not operate with visible moisture
on the circuit boards.
Table A- 18: Physical Characteristics
CATEGORY
DESCRIPTION
Dimensions
Req: Height:
Width:
Depth:
Weight
5 1/4 inches (133.4 millimeters)
8 1/2 inches (215.9 millimeters)
18 1/8 inches (460.4 millimeters)
Req: Net: 8 pounds (3.8 kilograms)
Shipping: Approximately 15.7 pounds (7.2
kilograms)
A-14
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Appendix A: Performance Specification
Certifications and Compliances
Table A- 19: Certifications and compliances
CATEGORY
STANDARDS OR DESCRIPTION
EC Declaration of
Conformity -- EMC 1
Meets intent of Directive 89/336/EEC for Electromagnetic
Compatibility. Compliance was demonstrated to the following
specifications as listed in the Official Journal of the European
Union:
EN 50081-1 Emissions:
EN 55022
Class B Radiated and Conducted Emissions
EN 50082-1 Immunity:
IEC 801-2
Electrostatic Discharge Immunity
IEC 801-3
RF Electromagnetic Field Immunity
IEC 801-4
Electrical Fast Transient/Burst Immunity
1
High-quality shielded cables must be used to ensure
compliance to the above listed standards. This product
complies when installed into any of the following Tektronix
instrument enclosures:
1700F00 Standard Cabinet
1700F02 Portable Cabinet
1700F05 Rack Adaptor
Australia/New Zealand Complies with EMC provision of Radiocommunications Act
Declaration of
per the following standard(s):
Conformity -- EMC
AS/NZS 2064.1/2 Industrial, Scientific, and Medical
Equipment:1992
AS/NZS 3548
Information Technology Equipment: 1995
FCC Compliance
Emissions comply with FCC Code of Federal Regulations 47, Part
15, Subpart B, Class A Limits.
Installation
(Overvoltage)
Category
Terminals on this product may have different installation
(overvoltage) category designations. The installation categories
are:
CAT III
Distribution-level mains (usually permanently
connected). Equipment at this level is typically in a fixed
industrial location.
CAT II
Local-level mains (wall sockets). Equipment at this level
includes appliances, portable tools, and similar
products. Equipment is usually cord-connected.
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Appendix A: Performance Specification
Table A- 19: Certifications and compliances (cont.)
CATEGORY
STANDARDS OR DESCRIPTION
CAT I
Pollution Degree
Secondary (signal level) or battery operated circuits of
electronic equipment.
A measure of the contaminates that could occur in the
environment around and within a product. Typically the internal
environment inside a product is considered to be the same as the
external. Products should be used only in the environment for
which they are rated.
Pollution Degree 1
No pollution or only dry, nonconductive pollution occurs.
Products in this category are generally encapsulated,
hermetically sealed, or located in clean rooms.
Pollution Degree 2
Normally only dry, nonconductive pollution occurs.
Occasionally a temporary conductivity that is caused by
condensation must be expected. This location is a typical
office/home environment. Temporary condensation occurs
only when the product is out of service.
Pollution Degree 3
Conductive pollution, or dry, nonconductive pollution that
becomes conductive due to condensation. These are
sheltered locations where neither temperature nor humidity is
controlled. The area is protected from direct sunshine, rain, or
direct wind.
Pollution Degree 4
Pollution that generates persistent conductivity through
conductive dust, rain, or snow. Typical outdoor locations.
Safety Standards
U.S. Nationally
Recognized Testing
Laboratory Listing
UL1244
Standard for electrical and electronic measuring and test
equipment.
Canadian Certification
CAN/CSA C22.2 No. 231
CSA safety requirements for electrical and electronic
measuring and test equipment.
European Union
Compliance
Low Voltage Directive 73/23/EEC, amended by 93/69/EEC
EN 61010-1 Safety requirements for electrical equipment for
measurement, control, and laboratory use.
A-16
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Appendix A: Performance Specification
Table A- 19: Certifications and compliances (cont.)
CATEGORY
STANDARDS OR DESCRIPTION
Additional Compliance IEC61010-1
Safety requirements for electrical equipment for
measurement, control, and laboratory use.
Safety Certification Compliance
Temperature,
operating
+5 to +40_ C
Altitude (maximum
operating)
2000 meters
Equipment Type
Test and measuring
Safety Class
Class 1 (as defined in IEC 1010-1, Annex H) -- grounded product
Overvoltage Category
Overvoltage Category II (as defined in IEC 1010-1, Annex J)
Pollution Degree
Pollution Degree 2 (as defined in IEC 1010-1). Note: Rated for
indoor use only.
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Appendix A: Performance Specification
A-18
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Appendix B
Remote Connectors
The rear-panel remote connector is a 25-pin sub miniature
D-type with female contacts. Table B-1 shows pin assignments and Figure B-1 shows the connector.
Remote Connector
13
25
1
REMOTE
!
14
Figure B-1. Rear panel REMOTE connector.
Table B-1.
Remote Pin Functions and Signal Requirements.
Pin No.
Function
Signal Requirement
1
RGB/YRGB
Staircase Input
+10 V for RGB/YRGB
Miscellaneous Information
≈9 div of sweep.
(Staircase/external horizontal
and RGB/YRGB selections are
made through the menu.)
External Horizontal Input
0 - +5V Sawtooth
10 div. of horiz. deflection.
2
Ground
3
Staircase / Ext. Ground
Horizontal En- (TTL low)
able
Grounding this pin enables the
function. (Staircase or external
horizontal selected by menu.)
4
External Blank- Negative-going signal
ing Input
Enabled by menu selection.
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Appendix B: Remote Connectors
Table B-1.
Pin No.
Remote Pin Functions and Signal Requirements. (Cont.)
Function
Signal Requirement
Miscellaneous Information
5
Remote Sync
Input
TTL level square wave 30/90 Hz for NTSC
triggers a 2-field rate
25/100 Hz for PAL
sweep.
6
Remote Sync
Enable
Ground
(TTL low)
7
Ground
8
+Y Audio Input Max. Input ±8 V peak Measured to Chassis Ground.
9
- Y Audio Input
10
+X Audio Input Max. Input ±8 V peak Measured to Chassis Ground.
11
- X Audio Input
Max. Input ±8 V peak Measured to Chassis Ground.
12
+ Time Code
Input
- 10 - +10V peak
Longitudinal Time Code, differential.
13
- Time Code
Input
- 10 - +10V peak
Longitudinal Time Code, differential.
14
Ground
15
Not used
16
Not used
17
Preset 1
Ground
(TTL low)
Grounding pin 17 recalls frontpanel setup from preset 1.
Grounding pins 17 and 25 stores
current front-panel setup at preset 1.
18
Preset 2
Ground
(TTL low)
Grounding pin 18 recalls frontpanel setup from preset 2.
Grounding pins 18 and 25 stores
current front-panel setup at preset 2.
19
Preset 3
Ground
(TTL low)
Grounding pin 19 recalls setup
from preset 3. Grounding pins
19 and 25 stores current setup
at preset 3.
B-2
Grounding this pin enables the
function.
Max. Input ±8 V peak Measured to Chassis Ground.
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Appendix B: Remote Connectors
Table B-1.
Pin No.
Remote Pin Functions and Signal Requirements. (Cont.)
Function
Signal Requirement
Miscellaneous Information
20
Preset 4
Ground
(TTL low)
Grounding pin 20 recalls setup
from preset 4. Grounding pins
20 and 25 stores current setup
at preset 4.
21
Preset 5
Ground
(TTL low)
Grounding pin 21 recalls setup
from preset 5. Grounding pins
21 and 25 stores current setup
at preset 5.
22
Preset 6
Ground
(TTL low)
23
Preset 7
Ground
(TTL low)
24
Preset 8
Ground
(TTL low)
25
Store
Ground
(TTL low)
Grounding this pin along with
one of the Preset pins stores the
current front-panel setup at the
selected Preset location.
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Appendix B: Remote Connectors
Remote Connector Converter
If the 1760-- Series is used as a direct replacement for a
1740-- Series or 1750-- Series instrument, construct an adapter
or rewire the remote cable according to Figure B-2. If the
1760-- Series replaces an Option 16 instrument, construct the
adapter in the same manner, omitting the pin 3-to-pin-25
connection.
1760-- Series
Rear-Panel
REMOTE Connector
14
Remote Plug
1
RGB INPUT
3
RGB ENABLE*
5
6
7
REMOTE SYNC IN
14
GROUND
REMOTE SYNC ENABLE
25
1
8
9
10
19
25
13
13
* (Do not connect when replacing Option 16 instruments.)
Figure B-2. Using the 1760---Series as a 1740/1750---Series replacement.
B-4
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Appendix B: Remote Connectors
RS232 Connector
The serial interface has a driver built in for RS232 serial
binary data interchange. The operational mode is full duplex. The data rate is selectable through the Configure menu
for either 1200, 4800, or 9600 baud; data type is asynchronous. Figure B-3 shows the pin assignments.
PIN
NUMBER
5
9
1
RS232
6
1.
2.
3.
4.
5.
6.
7.
8.
9.
DATA
CONNECTION
DCD
RXD (RECEIVED DATA)
TXD (TRANSMITTED DATA)
DTR (DTE READY)
SIGNAL GROUND
DCR (DCE READY)
RTS (REQUEST TO SEND)
CTS (CLEAR TO SEND)
NOT CONNECTED
Figure B-3. Rear panel RS232 connector.
NOTE
The function of the RS232 connector may not be
supported at the time of this printing. The RS232
interface is used during an upgrade of the instrument software. Contact Tektronix for information
on availability of software upgrades and RS232
remote control commands.
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Appendix B: Remote Connectors
B-6
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Appendix C
User Service
This section contains instructions for user and preventive
maintenance. If the instrument does not function properly, it
should be referred to qualified service personnel or returned
to Tektronix for service. Packaging directions for shipment
are on page 1-9.
Cleaning or Replacing the Fan Filter
To ensure adequate air flow, it is essential to clean or replace
the rear-panel fan filter regularly. The interval between filter
cleaning or replacement is determined by the operating environment.
To remove the filter, take out the two screws that fasten the
housing to the rear panel.
Remove the filter and wash it in a mild detergent and water
solution. Place cleaned and dried filter (or new filter) in the
housing and replace housing over the fan. Replace and tighten the two screws (8 in lbs).
The filter part number is shown on page 1-7.
Fuse Replacement
Remove the fuse cap from the rear panel and replace the fuse
cartridge with a 250V, 2A, F-type fuse as specified on the
rear panel.
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Appendix C: User Service
Graticule Light Replacement
Replacement Bulbs
Replacement bulbs are supplied with this instrument as Standard Accessories. Additional bulbs
can be purchased from Tektronix or from local
electronics distribution sources. The Tektronix
part number and ordering information is given on
page 1-7.
Required Equipment
NOTE
For graticule light removal and replacement,
tweezers with curved, serrated tips are recommended. For example, Miltex PL312,6-100
(equivalent to PL312) or PL317 (longer than
PL312).
CAUTION
Needle-nosed pliers are not recommended.
Procedure
C-2
1.
Remove the five knobs below the CRT.
2.
Insert a small, straight-blade screwdriver into the recessed area on either the right or left side of the panel.
Pry gently until the panel snaps out of the front-panel
frame. See Figure C-1 for panel and recess location.
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Appendix C: User Service
3.
To remove a bulb, position the tweezer tips on the thin,
flat portion of the bulb (close to the plastic socket).
Carefully pull the bulb straight out.
4.
To install a new bulb, hold it with the tweezers as described in step 3, position it in front of the socket, and
push the bulb until it snaps in place.
5.
Replace the panel below the CRT, and press on both the
right and left sides of the panel until it snaps into place.
6.
Replace the five knobs below the CRT and tighten the
set screws.
Recess
Recess
Remove this panel
(shaded portion)
Remove these five knobs
Figure C-1. Graticule light replacement.
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Appendix C: User Service
Cleaning
The instrument should be cleaned often enough to prevent
dust and dirt from accumulating. Dirt acts as a thermal insulator, preventing effective heat dissipation, and can also provide high-resistance electrical leakage paths between conductors or components in a humid environment.
CAUTION
Do not allow water to get inside any enclosed
assembly or component. Do not clean any plastic
materials with benzene, toluene, xylene, acetone,
or similar compounds, because they may damage
the plastic.
Exterior
Clean the dust from the outside of the instrument with a soft,
clean cloth or small brush. A brush is especially useful for
removing dust from around the selector buttons, knobs, and
connectors. Hardened dirt can be removed using a soft cloth
dampened with a mild detergent and water solution. Abrasive cleaners should not be used.
CRT
Clean the light filter and CRT face with a soft, lint-free cloth
dampened in denatured alcohol. Abrasive cleaners should
not be used.
Interior
Interior cleaning and maintenance should be performed by
qualified service personnel only. Instructions for interior
maintenance are provided in the service manual.
C-4
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Appendix C: User Service
CAUTION
A 2% RMA flux content solder is recommended for
making repairs in this instrument. Cleaning of
rosin residue is not recommended. Most cleaning
solvents tend to reactivate the rosin and spread it
under components where it may cause corrosion
under humid conditions. The rosin residue, if left
alone, does not exhibit these corrosive properties.
Replacing the CRT Filter
A smoke-gray filter is installed over the face of the CRT.
The filter part number is given on page 1-7. If the filter becomes damaged, it can be replaced in the following manner:
1.
Remove the five knobs below the CRT.
2.
Insert a small, straight-blade screwdriver into the recessed area on either the right or left side of the panel.
Pry gently until the panel snaps out of the front-panel
frame. See Figure C-1 for panel and recess location.
3.
Remove the two Torx screws that fasten the bezel to
the instrument.
4.
Grasping the bottom of the bezel, pull out and upward to
remove the bezel from the instrument. (There are two
hinges at the top of the bezel that hold it in place; once
the bezel is at an approximate 45° angle with the front
panel, they will disengage.)
5.
Remove the damaged filter and snap the new filter into
place on the back side of the bezel. Position the ridged
side of the filter towards the CRT to eliminate unwanted
visual effects on the CRT face.
6.
Replace the bezel and bezel screws. Tighten screws (8
in lbs).
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Appendix C: User Service
C-6
7.
Replace the panel below the CRT, and press on both the
right and left sides of the panel until it snaps into place.
8.
Replace the five knobs below the CRT and tighten the
set screws.
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Appendix D
Software Version
Table D-1. Software Releases
Version
Date
2.1
APR
1993
2.2
OCT
1993
Serial No.
B010100
Mod
No.
Comments
Original software
New features: On-screen field sweep
indication. Configure menu selection
for RGB Parade display. Audio &
Time Code unit of measure changed to
dBu. On-screen pointer to left or right
side graticule for dual standard. Limited the 1of4 and 1of8 line select menu
entries to insturments with SC/H function only.
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Appendix D: Software Version
D-2
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Glossary
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Glossary
AC Coupled A connection which removes the constant
voltage (DC component) on which the signal (AC component) is riding. Usually implemented by passing the signal
through a capacitor.
Analog Components Video signals in which a continuously variable voltage or current (rather than a set of numbers) represents the value of a pixel.
APL (Average Picture Level.) The average signal level
(with respect to blanking) during active picture time, expressed as a percentage of the difference between the blanking and reference white levels.
Back Porch The portion of the video signal which lies
between the trailing edge of the horizontal sync pulse and the
start of the active picture time. Burst is located on back
porch.
Bandwidth The range of frequencies over which signal
amplitude remains constant (within some limit) as it is
passed through a system.
Baseband Refers to the composite video signal as it exists
before modulating the picture carrier. Composite video distributed throughout a studio and used for recording is at baseband.
Betacam, Betacam Format Portable camera/recorder
system and related equipment originally developed by Sony;
the name may also be used for just the recorder or for the
interconnect format. Betacam uses a version of the Y, R-- Y,
B-- Y component set.
Black Burst (NTSC) Also called “color black,” black
burst is a composite video signal consisting of all horizontal
and vertical synchronization information, burst, and usually
setup. Typically used as the house reference synchronization
signal in television facilities.
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Glossary
Black Burst (PAL) Also called “color black,” black
burst is a composite video signal consisting of all horizontal
and vertical synchronization information and burst. Typically used as the house reference synchronization signal in television facilities.
Blanking Level Refers to the 0 IRE level for NTSC systems (0.3 volt level, with respect to sync tip, for PAL systems) which exists before and after horizontal sync and
during the vertical interval.
Breezeway The portion of the video signal which lies
between the trailing edge of the horizontal sync pulse and
the start of burst. Breezeway is part of back porch.
Broad Pulses Another name for the vertical synchronizing pulses in the center of the vertical interval. These pulses
are long enough to be distinguished from all others, and are
the part of the signal actually detected by vertical sync separators.
Bruch Blanking (PAL) A 4-field burst blanking sequence employed in PAL signals to ensure that burst phase is
the same at the end of each vertical interval.
Burst (NTSC) A small reference packet of the subcarrier
sine wave, typically 8 or 9 cycles, which is sent on every line
of video. Since the carrier is suppressed, this phase and frequency reference is required for synchronous demodulation
of the color information in the receiver.
Burst (PAL) A small reference packet of the subcarrier
sine wave sent during the horizontal blanking interval on
every line of video. Since the carrier is suppressed, this
phase and frequency reference is required for synchronous
demodulation of the color difference signals in the receiver.
B--Y (NTSC) One of the color difference signals used in
the NTSC system, obtained by subtracting luminance from
the blue camera signal. This is the signal which drives the
horizontal axis of a vectorscope.
G-2
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Glossary
B--Y (PAL) One of the color difference signals used in the
PAL system, obtained by subtracting luminance (Y) from the
blue camera signal (B).
CAV Component Analog Video; component video signals in
which an analog voltage or current (rather than a set of numbers) represents the value of the pixel; the same as “analog
components.”
Chrominance Chrominance refers to the color information in a television picture. Chrominance can be further broken down into two properties of color: hue and saturation.
Chrominance Signal The high-frequency portion of the
video signal which is obtained by quadrature amplitude modulation of a 3.58 MHz (NTSC) or 4.43 MHz (PAL) subcarrier
with R-- Y and B-- Y information.
Color Black See Black Burst.
Color Correction A process in which the coloring in a
television image is altered or corrected by electronic means.
Care must be taken to insure that the modified video does not
exceed the limits of subsequent processing or transmission
systems.
Color Difference Signals Signals used by color television systems to convey color information in such a way that
the signals go to zero when there is no color in the picture.
R-- Y, B-- Y, I, and Q are all color difference signals for the
NTSC system; U and V are color difference signals for the
PAL system.
Component Video Video which exists in the form of
three separate signals, all of which are required in order to
completely specify the color picture. For example, R, G, and
B; or Y, R-- Y, and B-- Y.
Composite Video A single video signal containing all of
the necessary information to reproduce a color picture.
Created by adding quadrature amplitude modulated R-- Y and
B-- Y to the luminance signal for NTSC systems or U and V
to the luminance signal for PAL systems.
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Glossary
CW Continuous Wave. Refers to a separate subcarrier sine
wave used for synchronization of chrominance information.
dB (Decibel) A decibel is a logarithmic unit used to describe signal ratios. For voltages, dB = 20 Log10 (V1/V2).
DC-Coupled A connection configured so that both the
signal (AC component) and the constant voltage on which it
is riding (DC component) are passed through.
DC Restorer A circuit used in picture monitors and waveform monitors to clamp one point of the waveform to a
fixed DC level.
Demodulator In general, this term refers to any device
which recovers the original signal after it has modulated a
high-frequency carrier. In television it may refer to:
(1) An instrument, such as a TEKTRONIX 1450, which
takes video in its transmitted form (modulated onto the picture carrier) and converts it to baseband.
(2) The circuits which recover R-- Y and B-- Y for NTSC systems or U and V for PAL systems from the composite signal.
Digital Components Component signals in which the
values for each pixel are represented by a set of numbers.
Distortion If a sine wave of a single frequency is put into
a system, and harmonic content at multiples of that frequency appears at the output, there is harmonic distortion present
in the system. Harmonic distortion is caused by nonlinearities in the system.
Equalizer The pulses which occur before and after the
broad pulses in the vertical interval.
Envelope Detection A demodulation process in which
the shape of the RF envelope is sensed. This is the process
used by a diode detector.
Field In interlaced scan systems, the information for one
picture is divided up into two fields. Each field contains one
half of the lines required to produce the entire picture. Adjacent lines in the picture are in alternate fields.
G-4
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Glossary
Frequency Modulation (FM) is the process by which
the frequency of a carrier signal is varied in proportion to the
signal of interest. In both the NTSC and PAL television systems, audio information is transmitted using FM.
Frame A frame (sometimes called a “picture”) contains all
the information required for a complete picture. For interlaced scan systems, there are two fields in a frame.
Front Porch The portion of the video signal between the
end of active picture time and the leading edge of horizontal
sync.
Gamma (NTSC) Since picture monitors have a nonlinear
relationship between the input voltage and brightness, the
signal must be correspondingly predistorted. Gamma correction is always done at the source (camera) in television systems: the R, G, and B signals are converted to R1/V, G1/V,
and B1/V. Values of about 2.2 are typically used for gamma.
Gamma (PAL) Since picture monitors have a nonlinear
relationship between the input voltage and brightness, the
signal must be correspondingly predistorted. Gamma correction is always done at the source (camera) in television systems: the R, G, and B signals are converted to R1/V, G1/V,
and B1/V. Values for gamma range from 2.2 to 2.8.
Gen Lock The process of locking both sync and burst of
one signal to sync and burst of another, making the two signals completely synchronous.
Graticule The scale which is used to quantify the information on a waveform monitor or vectorscope display. Graticules may either be screened onto the faceplate of the CRT
itself (internal graticule), or onto a piece of glass or plastic
which fits in front of the CRT (external graticule). They can
also be electronically generated.
Horizontal Blanking Horizontal blanking is the entire
time between the end of the active picture time of one line
and the beginning of active picture time of the next line. It
extends from the start of front porch to the end of back
porch.
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Glossary
Horizontal Sync Horizontal sync is the - 40 IRE pulse in
NTSC systems (-- 300 mV pulse for PAL systems) occurring
at the beginning of each line. This pulse signals the picture
monitor to go back to the left side of the screen and trace
another horizontal line of picture information.
Hue Hue is the property of color which allows us to distinguish between colors such as red, yellow, purple, etc.
Hum Hum refers to the undesirable coupling of the 60 Hz
power sine wave for NTSC systems (50 Hz power sine wave
in PAL systems) into other electrical signals.
ITS (PAL) Insertion Test Signal. A test signal which is
inserted in one line of the vertical interval to facilitate in-service testing.
IRE (NTSC) A unit equal to 1/140 of the peak-to-peak
amplitude of the video signal, which is typically 1 volt. The
0 IRE point is at blanking level, with sync tip at - 40 IRE and
white extending to +100 IRE. IRE stands for Institute of
Radio Engineers, the organization which defined the unit.
Linear Distortion Refers to distortions which are independent of signal amplitude.
Luminance (Y) The signal which represents brightness,
or the amount of light in the picture. This is the only signal
required for black and white pictures, and for color systems it
is obtained as a weighted sum (Y = 0.3R + 0.59G + 0.11B) of
the R, G, and B signals.
MII (M2) Format Second generation camera/recorder
system developed by Panasonic; also used for just the recorder or the interconnect format. MII uses a version of the (Y,
R-- Y, B-- Y) component set.
Modulated (NTSC) When referring to television test
signals, this term implies that chrominance information is
present. (For example, a modulated staircase has subcarrier
on each step.)
G-6
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Glossary
Modulated (PAL) When referring to television test signals, this term implies that chrominance information is present. (For example, a modulated staircase has subcarrier on
each step.)
Modulation A process which allows signal information to
be moved to other frequencies in order to facilitate transmission or frequency-domain multiplexing. See FM for details.
Nonlinear Distortion Refers to distortions which are
amplitude-dependent.
NTSC National Television System Committee. The organization which developed the television standard currently in
use in the United States, Canada, and Japan. Now generally
used to refer to that standard.
PAL Phase Alternate Line. Refers to one of the television
systems used in Europe and many other parts of the world.
The phase of one of the color difference signals alternates
from line to line to help cancel out phase errors.
Quadrature AM A process which allows two different
signals to modulate a single carrier frequency. The two signals of interest Amplitude Modulate carrier signals which are
the same frequency but differ in phase by 90 degrees (hence
the Quadrature notation). The two resultant signals can be
added together, and both signals recovered at the other end, if
they are also demodulated 90 degrees apart.
Quadrature Distortion Distortion resulting from the
asymmetry of sidebands used in vestigial sideband television
transmission. Quadrature distortion appears when envelope
detection is used, but can be eliminated by using a synchronous demodulator.
RF Radio Frequency. In television applications, RF generally refers to the television signal after the picture carrier
modulation process.
RGB Red, Green, and Blue. Also referred to as GBR. The
three primary colors used in color television’s additive color
reproduction system. These are the three color signals gener-
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Glossary
ated by the camera and used by the picture monitor to produce a picture. The same signals may also be called “GBR”
as a reminder of the mechanical sequence of connections in
the SMPTE interconnect standard.
R--Y One of the color difference signals is obtained by subtracting luminance (Y) from the red camera signal.
Saturation The property of color which relates to the
amount of white light in the color. Highly saturated colors
are vivid, while less saturated colors have more white mixed
in and, therefore, appear pastel. For example, red is highly
saturated, while pink is the same hue, but much less saturated.
In signal terms, saturation is determined by the ratio between
luminance level and chrominance amplitude. It should be
noted that a vectorscope does not display saturation; the
length of the vectors represents chrominance amplitude. In
order to verify that the saturation of the colors in a color bar
signal is correct, you must check luminance amplitudes with
a waveform monitor in addition to observing the vectors.
SCH The timing relationship between the horizontal sync
pulses and the zero crossings of the reference subcarrier
(burst).
Setup In NTSC systems, video black is typically 7.5 IRE
above the blanking level. This 7.5 IRE level is referred to as
the black setup level, or simply as setup.
SMPTE Society of Motion Picture and Television Engineers.
SMPTE Format In component television, this refers to
the SMPTE standards for parallel analog component video
interconnection. The SMPTE has standardized both RGB
and Y, PB, PR color difference systems.
Subcarrier The modulation sidebands of the color subcarrier contain the R-- Y (V) and B-- Y (U) information. For
NTSC, subcarrier frequency is 3.579545 MHz. For PAL,
subcarrier frequency is 4,433,619.75 Hz.
G-8
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Glossary
Synchronous Detection A demodulation process in
which the original signal is recovered by multiplying the
modulated signal with the output of a synchronous oscillator
locked to the carrier.
Termination In order to accurately send a signal through
a transmission line, there must be an impedance at the end
which matches the impedance of the source and of the line
itself. Amplitude errors and reflections will otherwise result.
Video is a 75 Ω system, so a 75 Ω terminator must be put at
the end of the signal path.
Time Code, Longitudinal (LTC) LTC is an 80-bit
signal with information which makes it possible to accurately
identify an individual frame. The LTC signal is typically
recorded on an audio channel.
Time Code, Vertical (VITC) VITC is a signal in the
vertical interval of video, which makes it possible to accurately identify an individual field.
U The B-- Y signal after a weighting factor of 0.493 has been
applied. The weighting is necessary to reduce peak modulation in the composite signal.
Unmodulated When used to describe television test signals, this term refers to pulses and pedestals which do not
have high-frequency chrominance information added to
them.
V The R-- Y signal after a weighting factor of 0.877 has been
applied. The weighting is necessary to reduce peak modulation in the composite signal.
Vectorscope A specialized oscilloscope which demodulates the video signal and presents a display of R-- Y versus
B-- Y in NTSC systems (or V versus U in PAL systems). The
angle and magnitude of the displayed vectors are respectively
related to hue and saturation.
Vertical Interval The synchronizing information which
appears between fields and signals the picture monitor to go
back to the top of the screen to begin another vertical scan.
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Glossary
Waveform Monitor A specialized oscilloscope that plots
voltage versus time to evaluate television signals.
Y Abbreviation for luminance.
Y, I, Q The set of CAV signals specified for the NTSC system; Y is the luminance signal, I is the first color difference
signal and Q is the second color difference signal.
Y, PB, PR A version of Y, R-- Y, B-- Y specified for the
SMPTE analog component standard.
Y, R--Y, B--Y The general set of CAV signals used in the
PAL system; Y is the luminance signal, R-- Y is the first color
difference signal and B-- Y is the second color difference signal.
Zero Carrier Reference A pulse in the vertical interval
which is produced by the demodulator to provide a reference
for evaluating depth of modulation.
G-10
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Index
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Index
A
Camera, 1-7
A123/B123, 2-6, 3-5
Certifications, A-15
Accessories, 1-7
field upgrade kits, 1-8
Chroma bandwidth measurements, 3-9,
4-8
Carrying case, 1-8
incoming inspection list, 1-9
Clamp point, 3-20
optional, 1-7
Cleaning
standard (included), 1-7
Air filters, replacement, 1-7
Audio
air filter (fan filter), C-1
the CRT, C-4
the instrument, C-4
Display, 2-4, 3-2
Clear menu, 2-7
Measurements, 4-14
Color framing, 3-2
Audio Mode, Specification, A-10
Auto
cursor units, 3-22
television standard, 3-22
Compliances, A-15
Component signals, 4-3
Component Vector Mode, Specification,
A-11
Configure menu, 3-20
calibrate, 3-24
B
reference, 3-25
Back porch, 3-20
standard (NTSC/PAL), 3-22
remote, 3-25
Bezel buttons, 2-2
Bezel controls, 2-2
vector, 3-21
Connectors, rear-panel, 2-8
Blank panel (optional accessory), 1-8
BNC inputs, 2-8
Controls, front-panel, 2-1
BOWTIE display, 2-5
CRT
Coupling, AC/DC, 3-20
Bowtie Mode, Specification, A-12
filter part number, 1-7
Bowtie Display, 4-20
filter replacement, C-5
menu, 3-27
options, 1-6
C
CRT Display, Specification, A-13
Cabinets (optional accessories)
installation, 1-12
Cursor menu, 3-10
part numbers, 1-8
Calibrator
Signal frequency, 3-24
Specification, A-8
1760 Series Component Waveform/Vector Monitor User Manual
I ---1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Index
D
G
DC restorer, 2-5
Gain
slow or fast, 3-20
Diamond Display, 4-18
adjustment, 4-23
menu, 3-26
Differential gain measurements, 4-8
reset, 3-24, 3-25
Differential phase measurements, 4-8
X1, X5, X10, 3-26
Differentiated step filter, 3-9
Graticule
Dimensions, A-14
Display modes, 2-4, 3-1
illumination, 3-27
vector, 4-6
Dual-standard graticule, 4-7
waveform, 4-1
Graticule lights
part number, 1-7
E
replacement, C-2
Electrical installation, 1-10
Electrical specification, A-2
Environmental Characteristics, Specification, A-14
External horizontal, 3-25
H
HAD bar, 4-5
Horizontal Deflection, Specification, A-5
External reference, 2-5, 2-8
configure, 3-25
Specification, A-5
for dual-standard monitors, 3-25
I
Input channels, 2-6, 3-5
Input connectors, 2-8
F
Input coupling, 3-20
Installation, 1-9
electrical, 1-10
Factory preset, 3-18
Fan filter
mechanical, 1-12
cleaning or replacing, C-1
part number, 1-7
remote connector, 1-11
Intensity adjustment, 1-15, 3-27
Field sweeps, 2-5
Field upgrade kits, 1-8
Filter, air, see fan filter, 1-7
Focus, 3-27
Front-panel controls, 2-1
Front-panel cover , 1-7
K
K-factor measurements, 4-5
Fuse
part number, 1-7
replacing, C-1
I ---2
1760 Series Component Waveform/Vector Monitor User Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Index
L
Multiple display, 2-5, 3-4
Multi-use controls, 2-2
Light bulbs, part number, 1-7
LIGHTNING display, 2-4
Lightning Measurements, 4-15
Lightning Mode, Specification, A-12
O
Line select menu, 3-16
Offsets, enable, 3-23
Line/Field selection, 2-5
Operating standard, 1-1, 3-22
Operating voltage, 1-11
Lissajous waveform, 4-14
Luminance filter, 3-9
Option SC, 1-5
Optional accessories, 1-7
Options, 1-5
M
Ordering accessories, 1-8
Overlay mode, 2-6, 3-6
Magnifier, 2-5, 3-6
Mains frequency, 1-11
Manual, part numbers, 1-7
Markers, 3-11
Measurements, 4-1
P
Parade mode, 2-6, 3-5
audio, 4-14
Performance specification, A-2
chroma bandwidth, 4-8
Physical Characteristics, Specification,
A-14
differential phase and gain, 4-8
horizontal sync amplitude, 4-4
k-factor, 4-5
peak white, 4-5
pulse-to-bar, 4-5
SCH phase, 4-9
vector, 4-8
Measurement Cursors, Specification, A-7
Mechanical installation, 1-12
Picture display, 2-5, 3-4
Pix out (signal for picture monitor), 2-8
Polar cursors, 3-10
Position controls, 2-4
Power cord, 1-5
Power source, 1-10
Specification, A-13
Preset menu, 3-18
Menu
clear menu, 2-7, 3-8
configure, 2-7, 3-20
CRT, 2-7, 3-27
cursor, 2-7, 3-10
filter, 2-7
gain, 2-7, 3-26
R
R-Y filter, 3-9
Rack adapter
installation, 1-13
optional accessory, 1-8
line select, 2-7, 3-16
Readout intensity, 1-15, 3-27
multiple menu displays, 3-7
Rear-panel connectors, 2-8
preset, 2-7, 3-18
using the menus, 3-7
Recall preset, 3-19
1760 Series Component Waveform/Vector Monitor User Manual
I ---3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Index
Reference (internal/external), 3-25
Measurement Cursors, A-7
Reliability, A-2
Physical Characteristics, A-14
Remote connector
Power source, A-13
configuration, 3-25
description, 2-8, B-1
RGB/YRGB, A-7
SCH Phase Mode, A-11
pin assignments, B-1
Time code, A-10
wiring converter, B-4
Transcoder GBR Outputs, A-13
Remote sync, B-2
Vector Mode, A-8
Rename presets, 3-19
Reset, locked instrument controls, 2-1
Waveform Horizontal Deflection, A-5
Waveform Vertical Deflection, A-2
Reset gain, 3-24, 3-25
Staircase, 3-25, B-1
RGB/YRGB
Standard (NTSC/PAL), 1-1, 3-22
Specification, A-7
Standard accessories, 1-7
Staircase input, 3-25
Standby mode, 1-11, 2-1
RS232 connector, 2-9, B-5
Stereo audio measurements, 4-14
Store presets, 3-19
Subcarrier-to-horizontal phase, 3-2
S
Sweep rates, 4-1
Scale illumination, 3-27
SCH display, 1-5, 2-4, 3-2
selecting, 2-5, 3-6
Sync jitter, 3-2
Sync tip, 3-20
SCH phase measurements, 4-9
SCH Phase Mode, Specification, A-11
SCH R-Y, 3-9
Serial interface, B-5
T
Servicing, 1-9
Television standard (NTSC/PAL), 1-1, 3-22
Set, instrument gain, 3-24, 3-25
Test mode, 3-21
Setup, graticule, 4-2
Time code display, 2-5, 3-4, 4-22
Signal intensity, 1-15, 3-27
Software version, 3-25
Time code specification, A-10
Timing cursors, 3-11
Specification
Trace rotation, 3-27
Audio Mode, A-10
Bowtie Mode, A-12
Tanscoder GBR Outputs, Specification,
A-13
Calibrator, A-8
Component Vector Mode, A-11
Certifications and compliances, A-15
CRT Display, A-13
U
Utility drawer, 1-8
Electrical, A-2
Environmental Characteristics, A-14
External Reference, A-5
Lightning Mode, A-12
I ---4
1760 Series Component Waveform/Vector Monitor User Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Index
V
W
Variable gain, 3-26
Waveform cursors, 3-11
Vector display, 2-4, 3-1
Vector graticule, 4-6
Waveform display, 2-4, 3-2
Waveform graticule, 4-1
Vector markers, 3-10
Waveform markers, 3-11
Vector Mode, Specification, A-8
Waveform Horizontal Deflection,
Specification, A-5
Vertical Deflection, Specification, A-2
Vertical position control, 2-4
Viewing hood (optional accessory), 1-7
Voltage cursors, 3-11
Waveform Vertical Deflection,
Specification, A-2
White phosphor, 1-6
Weight, A-14
1760 Series Component Waveform/Vector Monitor User Manual
I ---5
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Index
I ---6
1760 Series Component Waveform/Vector Monitor User Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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