Tektronix SPG8000A User manual

SPG8000A
Master Sync / Clock Reference Generator
ZZZ
Service Manual
xx
Revision A
www.tek.com
*P077122000*
077-1220-00

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
supersedes 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:
In North America, call 1-800-833-9200.
Worldwide, visit www.tek.com to find contacts in your area.

Warranty
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.
[W2 – 15AUG04]

Table of Contents
Important safety information...................................................................................... v
General safety summary ...................................................................................... v
Service safety summary..................................................................................... vii
Terms in this manual ........................................................................................ viii
Symbols and terms on the product......................................................................... viii
Preface.............................................................................................................. ix
Manual structure .............................................................................................. ix
Manual conventions ........................................................................................... x
Product documentation....................................................................................... xi
Theory of operation ................................................................................................ 1
Base instrument theory of operation......................................................................... 1
Optional modules theory of operation....................................................................... 4
Adjustment procedures............................................................................................ 15
Adjust master clock using a frequency signal generator ................................................. 15
Adjust master clock while locked to GPS or GLONASS ................................................ 18
Adjust master clock while locked to PTP.................................................................. 20
Adjust Option BG............................................................................................. 23
Adjust Genlock/Black board ................................................................................ 29
Adjust Option SDI............................................................................................ 31
Maintenance........................................................................................................ 39
General service information ................................................................................. 39
Inspection and cleaning ...................................................................................... 42
Remove and replace procedures ............................................................................ 45
Troubleshooting............................................................................................... 75
Repackaging instructions .................................................................................. 117
Replaceable parts................................................................................................ 119
Parts ordering information................................................................................. 119
Replaceable parts lists...................................................................................... 121
SPG8000A Master Sync / Clock Reference Generator Service Manual i

Table of Contents
List of Figures
Figure 1: SPG8000A block diagram ............................................................................. 2
Figure 2: Simplified block diagram of the Option AG ........................................................ 4
Figure 3: Simplified block diagram of the Option BG ........................................................ 5
Figure 4: Simplified block diagram of the Genlock/Black, Option GPS, and PTP board circuitry ....... 7
Figure 5: Simplified block diagram of PTP board............................................................. 11
Figure 6: Simplified block diagram of Option SDI ........................................................... 12
Figure 7: Adjusting the master clock frequency using a frequency standard............................... 16
Figure 8: Variable resistors on the Option BG board.......................................................... 24
Figure 9: Adjusting the Option BG output offset and gain ................................................... 24
Figure 10: Adjusting chroma gain............................................................................... 27
Figure 11: Triggered display for adjusting the Option BG chroma gain .................................... 28
Figure 12: Equipment connections for Genlock/Black adjustments......................................... 29
Figure 13: Instrument orientation................................................................................ 47
Figure 14: Module locator diagram ............................................................................. 48
Figure 15: Cable connections 1 of 3............................................................................. 49
Figure 16: Cable connections 2 of 3............................................................................. 50
Figure 17: Cable connections 3 of 3............................................................................. 51
Figure 18: Removing the top cover ............................................................................. 53
Figure 19: Removing the front panel assembly................................................................ 56
Figure 20: Disassembling the front panel assembly........................................................... 57
Figure 21: Removing the power supply......................................................................... 60
Figure 22: Removing the Power Combiner board ............................................................. 62
Figure 23: Remove the two nuts................................................................................. 70
Figure 24: Remove the bracket from the fan ................................................................... 71
Figure 25: Main board (view from top)......................................................................... 82
Figure 26: Option AG troubleshooting procedure............................................................. 84
Figure 27: Option BG troubleshooting procedure ............................................................. 86
Figure 28: Genlock/Black generator module power supply test ............................................. 91
Figure 29: Genlock/Black generator board voltage test point and fuse locations.......................... 93
Figure 30: SDI power supply test points...................................................................... 114
Figure 31: Main instrument exploded view .................................................................. 121
Figure 32: Chassis assembly exploded view ................................................................. 123
Figure 33: Front panel assembly exploded view............................................................. 125
Figure 34: Option AG exploded view......................................................................... 127
Figure 35: Option BG exploded view......................................................................... 128
Figure 36: Genlock/Black board and Option GPS Receiver board exploded view ...................... 130
Figure 37: Option SDI board and Option SDI Output board exploded view ............................. 132
ii SPG8000A Master Sync / Clock Reference Generator Service Manual

Table of Contents
List of Tables
Table i: Product documentation.................................................................................. xi
Table 1: Equipment required to adjust the master clock using a signal generator.......................... 16
Table 2: Equipment required to adjust the master clock while locked to GPS or GLONASS............ 18
Table 3: Equipment required to adjust the master clock while locked to PTP.............................. 20
Table 4: Adjusting Option BG ................................................................................... 23
Table 5: Equipment required for the Genlock/Black board adjustment procedures........................ 29
Table 6: Equipment required for the Option SDI adjustment procedures................................... 31
Table 7: SDI output amplitude ....................... ................................ ............................ 32
Table 8: External inspection checklist........................................................................... 43
Table 9: Internal inspection checklist ........................................................................... 43
Table 10: Required tools for removal and replacement of modules ......................................... 46
Table 11: Cable connections table 1 of 3 ....................................................................... 49
Table 12: Cable connections table 2 of 3 ....................................................................... 50
Table 13: Cable connections table 3 of 3 ....................................................................... 51
Table 14: Slot I/O test error codes............................................................................... 78
Table 15: SPG8000A system diagnostics....................................................................... 79
Table 16: SPG8000A troubleshooting procedures............................................................. 81
Table 17: Equipment required to troubleshoot the Option AG............................................... 83
Table 18: Equipment required for Option BG troubleshooting............................................... 85
Table 19: Equipment required for troubleshooting the Genlock/Black generator module ................ 87
Table 20: General problems – Genlock/Black board.......................................................... 88
Table 21: POST error codes for the Genlock/Black module.................................................. 89
Table 22: Power supply test points .............................................................................. 92
Table 23: Equipment required for troubleshooting the Option GPS module ............................... 97
Table 24: General problems – Option GPS..................................................................... 98
Table 25: POST error code for Option GPS.................................................................... 99
Table 26: Equipment required to troubleshoot the Option PTP ............................................ 103
Table 27: Equipment required to troubleshoot the Option SDI ............................................ 105
Table 28: Option SDI troubleshooting ........................................................................ 106
Table 29: POST error codes for Option SDI ................................................................. 107
Table 30: Option SDI module factory default settings ...................................................... 110
Table 31: Parts list column descriptions ...................................................................... 120
Table 32: Main instrument replaceable parts................................................................. 121
Table 33: Chassis assembly replaceable parts................................................................ 122
Table 34: Front panel assembly replaceable parts ........................................................... 124
Table 35: Option AG – replaceable parts ..................................................................... 126
Table 36: Option BG – replaceable parts ..................................................................... 128
Table 37: Genlock/Black board and Option GPS Receiver board – replaceable parts................... 129
SPG8000A Master Sync / Clock Reference Generator Service Manual iii

Table of Contents
Table 38: Option SDI – replaceable parts..................................................................... 131
Table 39: Standard and optional accessories for the SPG8000A........................................... 133
iv SPG8000A Master Sync / Clock Reference Generator Service Manual

Important safety information
This manual contains information and warnings that must be followed by the user
for safe operation and to keep the product in a safe condition.
To safely perform service on this product, additional information is provided at
the end of this section. (See page vii, Service safety summary.)
General safety summary
Use the product only as specified. Review the following safety precautions to
avoid injury and prevent damage to this product or any products connected to it.
Carefully read all instructions. Retain these instructions for future reference.
Comply with local and national safety codes.
For correct and safe operation of the product, it is essential that you follow
generally accepted safety procedures in addition to the safety precautions specified
in this manual.
The product is designed to be used by trained personnel only.
Only qualified personnel who are aware of the hazards involved should remove
the cover for repair, maintenance, or adjustment.
Before use, always check the product with a known source to be sure it is
operating correctly.
This product is not intended for detection of hazardous voltages.
While using this product, you may need to access other parts of a larger system.
Read the safety sections of the other component manuals for warnings and
cautions related to operating the system.
When incorporating this equipment into a system, the safety of that system is the
responsibility of the assembler of the system.
SPG8000A Master Sync / Clock Reference Generator Service Manual v

Important safety information
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.
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, make sure that the product is properly grounded.
Do not disable the power cord grounding connection.
Power disconnect. The power cord disconnects the product from the power
source. See instructions for the location. Do not position the equipment so that
it is difficult to operate the power cord; it must remain accessible to the user at
all times to allow for quick disconnection if needed.
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.
Do not operate without covers. Do not operate this product with covers or panels
removed, or with the case open. Hazardous voltage exposure is possible.
Avoid exposed circuitry. Do not touch exposed connections and components
when power is present.
Do not operate with suspected failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
Disable the product if it is damaged. Do not use the product if it is damaged
or operates incorrectly. If in doubt about safety of the product, turn it off and
disconnect the power cord. Clearly mark the product to prevent its further
operation.
Before use, inspect voltage probes, test leads, and accessories for mechanical
damage and replace when damaged. Do not use probes or test leads if they are
damaged, if there is exposed metal, or if a wear indicator shows.
Examine the exterior of the product before you use it. Look for cracks or missing
pieces.
Use only specified replacement parts.
Do not operate in wet/damp conditions. Be aware that condensation may occur if
a unit is moved from a cold to a warm environment.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry. Remove the input signals before you clean
the product.
vi SPG8000A Master Sync / Clock Reference Generator Service Manual

Important safety information
Provide proper ventilation. Refer to the installation instructions in the manual for
details on installing the product so it has proper ventilation.
Slots and openings are provided for ventilation and should never be covered or
otherwise obstructed. Do not push objects into any of the openings.
Provide a safe working environment. Always place the product in a location
convenient for viewing the display and indicators.
Be sure your work area meets applicable ergonomic standards. Consult with an
ergonomics professional to avoid stress injuries.
Use only the Tektronix rackmount hardware specified for this product.
Servicesafetysummary
The Service safety summary section contains additional information required to
safely perform service on the product. Only qualified personnel should perform
service procedures. Read this Service safety summary and the General safety
summarybefore performing any service procedures.
To avoid electric shock. Do not touch exposed connections.
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 product power and
disconnect the power cord from the mains power before removing any covers or
panels, or opening the case for servicing.
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.
Verify safety after repair. Always recheck ground continuity and mains dielectric
strength after performing a repair.
SPG8000A Master Sync / Clock Reference Generator Service Manual vii

Important safety information
Termsinthismanual
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.
Symbols and 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.
When this symbol is marked on the product, be sure to consult the manual to
find out the nature of the potential hazards and any actions that must be taken
to avoid them. (This symbol may also be used to refer the user to ratings in
the manual.)
The following symbol(s) may appear on the product:
viii SPG8000A Master Sync / Clock Reference Generator Service Manual

Preface
This manual contains information needed to service an SPG8000A Master Sync /
Clock Reference Generator to the module level.
If the instrument does not function properly, troubleshooting and corrective
measures should be taken immediately to prevent additional problems.
NOTE. Contact your local Tektronix representative for information on where to
return your instrument if it requires repair during the warranty period.
To prevent personal injury or damage to the SPG8000A, consider the following
before beginning service:
The procedures in this manual should be performed only by a qualified service
person.
Read theGeneral safety summary. (Seepagev.)
Read the Service safety summary. (Seepagevii.)
When using this manual for servicing, be sure to follow all warnings, cautions,
and notes.
Manual structure
This manual is divided into the following sections:
Theory of operation contains circuit descriptions that support service to the
module level.
Adjustment procedures contains procedures for adjusting an SPG8000A
generator to meet warranted characteristics.
Maintenance contains information and procedures for performing preventive
and corrective maintenance for the SPG8000A generator. These instructions
include cleaning and fault isolation to the module level.
Remove and replace procedures contains procedures to safely remove
replaceable modules from the instrument.
Troubleshooting procedures contains information and procedures to help
you isolate and fix various problems.
Replaceable parts includes a table of all replaceable modules, their
descriptions, and their Tektronix part numbers.
SPG8000A Master Sync / Clock Reference Generator Service Manual ix

Preface
Manual conventions
This manual uses certain conventions with which you should become familiar.
Some sections of the manual contain procedures for you to perform. To keep those
instructions clear and consistent, this manual uses the following conventions:
Names of front panel controls and menus appear in the same case (initial
capitals, all uppercase, etc.) in the manual as is used on the SPG8000A front
panel and menus.
Instruction steps are numbered unless there is only one step.
Bold text refers to specific interface elements that you are instructed to select,
click, or clear.
Example: Press the ENTER button to access the PRESET submenu.
Italic text refers to document names or sections. Italics are also used in
NOTES, CAUTIONS, and WARNINGS.
Example: The Theory of operation section includes a block diagram.
Modules Throughout this manual, the term module appears. A module is composed of
electrical and mechanical assemblies, circuit cards, and interconnecting cables.
Safety Symbols and terms related to safety appear in the General safety summary.
x SPG8000A Master Sync / Clock Reference Generator Service Manual

Preface
Product documentation
The following table lists the user documents for the SPG8000A generator:
Table i: Product documentation
Availability
Document Tektronix Part Number Description Print Web CD
Quick Start User Manual 071-3080-xx (English)
077-0745-xx (Japanese)
077-0746-xx (Russian)
Describes how to install the
instrument and provides basic
operating information
Technical Reference 077-0747-xx Provides detailed operating
information
Specifications and
Performance Verification
077-0748-xx Lists the product specifications and
provides procedures for verifying
the performance of the instrument
Service Manual 077-1220-xx Describes how to service the
instrument to the module level
(such as circuit boards and fuses)
Declassification and
Security Instructions
077-0750-xx Describes how to clear or sanitize
the data storage (memory) devices
in the product for customers with
data security concerns.
Release Notes 077-0751-xx Describes the new features,
improvements, and limitations of
the instrument firmware
Video Sync Pulse
Generator and Electronic
Changeover Unit System
Integration Technical
Reference
077-0563-xx
(ECO422D)
077-0877-xx
(ECO8000, ECO8020)
Provides information for system
integrators who are designing
systems for high-definition (HD)
and standard-definition (SD) digital
video content where Tektronix
electronic changeover units and
video sync pulse generators are to
be deployed.
SPG8000A Master Sync / Clock Reference Generator Service Manual xi

Preface
xii SPG8000A Master Sync / Clock Reference Generator Service Manual

Theory of operation
Base instrument theory of operation
This section describes the basic operation of the major circuit blocks or modules
in the SPG8000A generator. The block diagram shows the modules and functional
blocks in the instrument. (See Figure 1.)
Information about the circuit blocks, including a detailed block diagram of the
Genlock/Black board, follows the SPG8000A block diagram.
Main board The Main board consists of the following seven blocks.
Processor core. The processor core consists of the CPU and all of its support
circuits such as flash memory, DDR memory, clocks, buffers, reset circuit,
configuration memory, and decoder PLD.
The CPU controls the front panel, LCD display, USB port, network interface,
GPI interface, and installed generator boards. The CPU also controls execution
of remote commands and downloading and uploading of signal files through
the Ethernet interface.
The flash memory holds the firmware data and signal data used to generate outputs
from some modules. During Genlock, PTP, GPS or GLONASS referenced
operation, the CPU reads data from the input module, and controls the frequency
of the secondary clocks.
Ovenized oscillator. The ovenized oscillator provides the stable time base for
generating signals. This is a fixed 20 MHz and is not adjustable.
Video / audio clocks. The synthesizer creates the video and audio clocks from the
oven output. The video clocks are a 54 MHz master clock signal and HD rate
clocks of 74.25 MHz and a 74.25/1.001 MHz. The audio clock is 12.288 MHz.
The CPU can control the ratio between the oven and these clocks. By controlling
this ratio, the system can lock to external signals for Genlock, PTP, GPS or
GLONASS reference. The ratio is also adjusted to achieve calibration, with the
resulting value stored in flash memory.
The 54 MHz and the 12.288 MHz are delivered to each generator card. For the
HD rate clocks, the CPU controls four multiplexers that independently allow
each generator card to get either the 74.25 MHz or 74.25/1.001 MHz clock. The
diagnostics monitor that each clock is correctly locked to the oven or master
54 MHz clock.
Frame pulse generator. The frame pulse generator uses the 54 MHz clock to
generate the three frame pulses at 2.997 Hz, 6.25 Hz, and 3.00 Hz that are used to
synchronize the signal formats generated by the installed options.
SPG8000A Master Sync / Clock Reference Generator Service Manual 1

Theory of operation
Figure 1: SPG8000A block diagram
2 SPG8000A Master Sync / Clock Reference Generator Service Manual

Theory of operation
DC/DC converters. This block converts the +5 V supplied by the Power Combiner
board to –5 V, 3.3 V, 8 V, and 5 V analog for use by the circuit boards. Various
voltages needed only on the Main board, such as to drive the DDR and processor
core, are also provided.
The high current 5 V and 3.3 V voltages supplied to the slots are fused at the
connector to each generator board. All of the major voltages, including both sides
of each fuse, are monitored by the voltage diagnostic.
Control network interface. This block controls the Ethernet interface for the
Control Ethernet Port.
The Ethernet port is located on the PTP board at the instrument rear panel.
GPI interface. The GPI interface allows the CPU block to access the user inputs
and outputs through the GPI port located on the instrument rear panel.
There are two GPI circuit blocks, GPI 1 and GPI 2. GPI 1 is located on the Main
board. GPI 2 is located on the Genlock/Black board. Both sets of GPI signals
route through the cable to the PTP board. The PTP board houses the rear panel
GPI/LTC, and Ethernet connections. The signals from GPI 1 are used to restore
presets. They are connected to pins 3, 4 and 11 of the LTC/GPIO connector. The
GPI 2 signals are used to assert user configurable events, and to signal outputs
on certain conditions. These are connected to pins 1, 2 and 3. Note that pin 3
is dual use. It may be used as one of the bits which selects a preset, or as the
general purpose input.
Power supply The SPG8000A has a redundant power subsystem, which contains three major
components: the two power supply modules and the Power Combiner board.
Operation with one power supply module is also supported, but there is no
redundancy.
The power supply modules contain the line filter, the 100-240 VAC to 12 V supply,
a fan, and the power module board, which adapts the cables to a board-to-board
header. The power module board also has LEDs to drive the light pipe that shows
power status on the rear panel of the power supply module.
The power module board has an EEPROM to log hours of operation. Since
the power module board tracks the use time on the other supply components,
replacing components within the supply module is not allowed.
The Power Combiner board takes in the 12 V from the one or two supplies, and
converts to 5 V for the rest of the instrument. If there are two good supplies, the
embedded microcontroller in the combiner chooses the preferred one. If either
supply has an issue, the microcontroller chooses the best one. 12 V storage
capacitors allow time for the system to switch supplies without any disruption of
the 5 V output. During the start up of the combiner microcontroller, the combiner
functions in diode mode and uses the supply with the higher voltage, or a mix of
the two.
SPG8000A Master Sync / Clock Reference Generator Service Manual 3

Theory of operation
The Power Combiner board also has the fan controllers, so the speed of all three
fans can be set and sensed by the instrument processor over the I2C interface.
The network interface signals pass through the combiner but only connect to
the two connectors.
An I2C interface is used to allow the processor to access the micro-controller
on the power combiner, the fan speed control, and the EEPROMS in the power
supply modules.
Optional modules theory of operation
The instrument has a standard Genlock/Black generator board, plus orderable
option boards. The options are: GPS Receiver board, AG board, BG board, and
SDI board. This section describes the functions associated with those boards.
Option AG This section describes the basic operation of the major circuit blocks in the
Option AG Audio Generator.
Bus interface. This block provides the communication between the Option AG
circuitry and the instrument Main board.
Audio memory. This block contains 20/24 bits audio data for all of the serial
audio outputs.
Audio data controller. The block is a part of the FPGA. It receives audio data
from the Audio Memory and encodes thesedatatoserialaudiodatastreamthat
comply with the AES/EBU standard.
Channel buffers (1+2, 3+4, 5+6, 7+8, and silence). These blocks receive the digital
audio data from the FPGA and set the output amplitude to the specified level.
Figure 2: Simplified block diagram of the Option AG
4 SPG8000A Master Sync / Clock Reference Generator Service Manual