Tektronix ECO422D User manual

Instruction Manual
ECO422D
SD/HD Changeover Unit
S/N C050000 and above
077-0354-00
*P077035400*
077035400

Instruction Manual
ECO422D
SD/HD Changeover Unit
S/N C050000 and above
077-0354-00
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com

Copyright ©Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or
suppliers, and are protected by national copyright laws and international treaty provisions.
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 and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
HIn North America, call 1-800-833-9200.
HWorldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1)
year 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. Parts, modules and replacement products used by Tektronix for warranty work
may be new or reconditioned to like new performance. All replaced parts, modules and products become the
property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defective product to the service center designated by Tektronix, with
shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a
location within the country in which the Tektronix service center is located. Customer shall be responsible for
paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been
modified or integrated with other products when the effect of such modification or integration increases the time
or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

ECO422D SD/HD Changeover Unit Instruction Manual i
Table of Contents
General Safety Summary v...................................
Service Safety Summary vii....................................
Preface ix...................................................
Operating Basics
Controls and Indicators 1--1............................................
Connectors 1--5.....................................................
Operating Basics 1--8.................................................
State Machine Description 1--8.........................................
Specifications
Introduction 2--1....................................................
Theory of Operation
Logic Conventions 3--1...............................................
ECO422D Block Level Description 3--2..................................
ECO422D Option ELSW Block Level Description 3--3......................
Performance Verification
Calibration Data Report 4--1...........................................
Equipment Required 4--7..............................................
Performance Verification Procedure 4--8.................................
Adjustment Procedure
Adjusting the User-Defined Threshold Levels 5--1..........................
Maintenance
Service Options 6--1..................................................
Service Preparation 6--1...............................................
Preventive Maintenance 6--1...........................................
Corrective Maintenance 6--4...........................................
Tektronix Service Offerings 6--6........................................
Removal/Replacement Procedures 6--8...................................
Repackaging Instructions 6--22..........................................
Replaceable Electrical Parts
Replaceable Electrical Parts 7--1........................................

Table of Contents
ii ECO422D SD/HD Changeover Unit Instruction Manual
Replaceable Mechanical Parts
Parts Ordering Information 8--1.........................................
Using the Replaceable Mechanical Parts List 8--1..........................
Column Descriptions 8--2.............................................
Replaceable Mechanical Parts 8--3......................................
Appendices
Option ELSW A--1...................................................
Index

Table of Contents
ECO422D SD/HD Changeover Unit Instruction Manual iii
List of Figures
Figure 1--1: Front-panel controls 1--1.............................
Figure 1--2: Default position of the user configuration and
mode switches 1--2.........................................
Figure 1--3: Rear panel of the ECO422D 1--5.......................
Figure 1--4: Remote connector pins 1--6...........................
Figure 1--5: Wiring required to conform with SMPTE
fault reporting 1--7.........................................
Figure 1--6: Setup for adjusting R265 (the user level for SX-7) 1--10....
Figure 1--7: Selection switches and user level control locations 1--11....
Figure 2--1: Typical eye-pattern of 20 m of Belden 1694A cable 2--4....
Figure 2--2: Typical eye-pattern of Channels 1--6 HD output
(Channels 1--3 with Opt. ELSW) 2--4..........................
Figure 3--1: ECO422D Block diagram 3--2.........................
Figure 3--2: ECO422D Option ELSW Block diagram 3--3............
Figure 4--1: Setup to check Black Burst levels 4--9..................
Figure 4--2: Setup to check the component serial digital video levels 4--13
Figure 4--3: Setup to check the serial digital video composite levels 4--15
Figure 4--4: Setup to check the serial audio levels 4--18...............
Figure 4--5: Setup to check the component serial digital video levels 4--20

Table of Contents
iv ECO422D SD/HD Changeover Unit Instruction Manual
List of Tables
Table i: Product documentation x.............................
Table 1--1: Factory settings of channel configuration
switches (S1 -- S11) 1--3.....................................
Table 1--2: Remote connector pin-out 1--6.........................
Table 1--3: Truth table for ECO422D switching 1--9................
Table 2--1: General characteristics 2--2...........................
Table 2--2: Signal loss detection 2--5..............................
Table 2--3: Power supply 2--6...................................
Table 2--4: Mechanical (physical) characteristics 2--6...............
Table 2--5: Environmental characteristics 2--7.....................
Table 6--1: Static-sensitive components 6--3.......................
Table 6--2: Chassis replacement tools list 6--8......................
Table 6--3: Tightening specifications for chassis components 6--11.....

ECO422D SD/HD Changeover Unit Instruction Manual v
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.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
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.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Power Disconnect The power cord disconnects the product from the power
source. Do not block the power cord; it must remain accessible to the user at all
times.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
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.
To Avoid Fire or
Personal Injury

General Safety Summary
vi ECO422D SD/HD Changeover Unit Instruction Manual
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.
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. The following symbols may appear on the product:
CAUTION
Refer to Manual
WARNING
High Voltage
Protective Ground
(Earth) Terminal
Symbols and Terms

ECO422D SD/HD Changeover Unit Instruction Manual vii
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.

Service Safety Summary
viii ECO422D SD/HD Changeover Unit Instruction Manual

ECO422D SD/HD Changeover Unit Instruction Manual ix
Preface
This manual contains operating and servicing information for the ECO422D.
The information included in this manual explains how to operate, verify, and
service the system:
HOperating Basics explains the controls, indicators, connectors, and how to
operate the instrument.
HSpecifications describes functional characteristics and performance require-
ments for the ECO422D.
HTheory of Operation explains how the ECO422D operates.
HPerformance Verification describes how to verify the functional performance
of the ECO422D.
HAdjustment Procedures gives the field adjustment procedures.
HMaintenance contains the following information:
HHow to safely handle static sensitive modules and components
HHow to remove and replace replaceable parts
HCorrective maintenance information
HReplaceable Electrical Parts lists all replaceable parts in the ECO422D.
HReplaceable Mechanical Parts lists all replaceable parts in the ECO422D to
a module level. Parts are identified on an indexed illustration to make them
easier to identify.
HAppendices
HOptions lists the available options for the ECO422D.
HIndex

Preface
xECO422D SD/HD Changeover Unit Instruction Manual
Product Documentation
The following table lists the documentation that is available for the product and
shows where you can find it: in a printed manual, on the product documentation
CD--ROM, or on the Tektronix Web site at www.tektronix.com.
Table i: Product documentation
Item / Tektronix part number Purpose Location
ECO422D SD/HD Changeover Unit
Installation and Safety Instructions
071--2683--XX
Provides safety and compliance information
with hardware installation instructions to
present the associated safety warnings.
Printed manual and also available in electronic
form on the Product Documentation CD and at
www.tektronix.com/manuals
ECO422D SD/HD Changeover Unit
Instruction Manual (this manual)
077--0354--XX
Provides operation and application informa-
tion.
Electronic format on the Product Documenta-
tion CD and at www.tektronix.com/manuals
ECO422D SD/HD Changeover Unit
Reference Card
061--4234--XX
Provides a summary of factory default and
user switch settings.
Printed format and also available in electronic
form on the Product Documentation CD and at
www.tektronix.com/manuals

Operating Basics

ECO422D SD/HD Changeover Unit Instruction Manual 1-1
Operating Basics
Controls and Indicators
Figure 1--1 shows the layout of the ECO422D front-panel controls and indica-
tors.
Figure 1- 1: Front-panel controls
Sync Source - Primary/Backup. The LED indicates the current Output (whether it
is from the Primary or Backup input). It can be manually changed using the Sync
Source button. (If the ECO422D is in Normal mode, this is only true when the
other input is good or both inputs are bad. Refer to User Configuration Switch
(S14--8) on page 1--4.) Only one of these LEDs can be on. Primary is the default
at power-on.
Auto Switching - Switch on Fault/Disabled. This selects whether the ECO422D
will automatically switch to the other input source whenever it detects a fault
(Switch on Fault) or not switch (Disabled). Only one of these LEDs can be on
after the power-on delay. Switch on Fault is the default setting. During power-on,
the DISABLED LED slowly blinks to indicate disabled front panel and error
detection during the power--on delay.
Fault Indicator (Reset) - Primary/Backup. Either one or both of these LEDs could
be on. They indicate that a fault has occurred on the input. Press the Reset button
to clear the fault indicators (turn off the LEDs) after the fault has been corrected.
The fault indicator does not automatically reset after an error condition improves.
At power-on, the LEDs are reset.
Front Panel - Enabled/Locked Out. This control determines whether or not the
operator has access to the other front-panel controls. If it is Enabled, then the
user can control the instrument from the front panel. If it is Locked Out, then the
user can only toggle back to Enabled and no other front-panel controls are
available. The ECO422D will automatically lock out after about 1 minute of
inactivity to prevent accidental switching. The front panel is automatically
locked out at power-on (during power on, both LEDs are lit).

Operating Basics
1-2 ECO422D SD/HD Changeover Unit Instruction Manual
Channel Configuration Switch (11 dip switches S1 - S11; see Figure 1- 2). These
switches select the signal type checked on a channel by setting the amplitude
comparison level. Only one switch from each DIP package should be enabled
(closed) for each channel, except for attenuation (DIP 8 on switches S7 through
S11), which is allowed to be combined with either of the user-defined levels.
S6 S5 S4 S3 S2 S1
S11 S10 S9 S8 S7 S14
BACK
FRONT (SWITCHES SHOWN IN DEFAULT POSITION)
S13
Figure 1- 2: Default position of the user configuration and mode switches
Internal Controls