This document applies to firmware version 1.0
and above.
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.
that in all previously published material. Specifications and price change privileges reserved.
T ektronix, Inc., P.O. Box 500, Beaverton, OR 97077-0001
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
WARRANTY
T ektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship
for a period of one (1) year from the date of shipment. If a product proves defective during this warranty period, T ektronix,
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 T ektronix, with shipping charges prepaid.
T ektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
T ektronix 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. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than T ektronix 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-T ektronix supplies; or d) to service a product that has been modified or integrated with other
products when the effect of such modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO
REP AIR 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.
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.
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 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 .
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
Symbols and Terms
PQM300 Program QoS Monitor Service Manual
T erms 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.
xi
General Safety Summary
T erms 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
xii
PQM300 Program QoS Monitor Service Manual
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.
PQM300 Program QoS Monitor Service Manual
xiii
Service Safety Summary
xiv
PQM300 Program QoS Monitor Service Manual
Preface
This manual contains the servicing information for the PQM300 Program QoS
Monitor. This instrument is composed of a mainframe chassis that contains the
CPU, the CPU I/O board, and PQM300 hardware PCI modules and supporting
circuitry. The CPU runs under the Window NT operating system running the
PQM300 application software.
The information included in this manual explains how to verify, service,
troubleshoot, and repair the system to the module level:
HSpecifications describes functional characteristics and performance require-
ments for the PQM300 Program QoS Monitor.
HOperating Information tells you how to install and operate the instrument.
HTheory of Operation provides descriptions of the program monitor system
modules.
HPerformance Verification describes how to verify the functional performance
of the PQM300 system.
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 modules
HDiagnostic and Troubleshooting information and procedures
HOptions provides a brief description of the available options for the program
monitor system.
HReplaceable Electrical Parts. See the Replaceable Mechanical Parts List.
HDiagrams provides a simplified interconnection block diagram.
HReplaceable Mechanical Parts List gives all module and mechanical parts
that comprise the program monitor system. Parts are identified on an indexed
illustration to make them easier to identify.
HAppendix A provides the procedure to follow in the event that the operating
system software needs to be repaired. Installing the application software and
loading the video test sequences are also explained.
PQM300 Program QoS Monitor Service Manual
xv
Preface
Related Manuals
Manual Conventions
ThePQM300 Program QoS Monitor user documentation consists of the
following:
HThe PQM300 Program QoS Monitor User Manual details how to operate
this picture quality monitoring system.
The following terms and conventions are used throughout this manual:
HThe terms program monitor and PQM300 program monitor are used
interchangeably with the more formal term PQM300 Program QoS Monitor.
HThe term mainframe refers to the computer platform that hosts the PQM300
Program QoS Monitor.
xvi
PQM300 Program QoS Monitor Service Manual
Introduction
Before You Begin
This manual contains maintenance information for thePQM300 Program QoS
Monitor. Take a few minutes to read this short introduction before doing any
repair or service work on the instrument.
This manual is for servicing the PQM300 Program QoS Monitor. To prevent
injury to yourself or damage to the program monitor system, fulfill the following
requirements before you attempt service:
HBe sure you are a qualified service person.
HRead the Safety Summary found at the beginning of this manual.
HRead the following Service Strategy information.
When using this manual to service your program monitor system, be sure to heed
all warning, cautions, and notes.
Service Strategy
This manual contains the following maintenance and repair procedures:
Once you isolate a problem with a module, use the Replaceable Parts List in this
manual to determine the correct module part number to order from Tektronix.
PQM300 Program QoS Monitor Service Manual
xvii
Introduction
Tektronix Service Offerings
Tektronix provides service to cover repair under warranty. Other services are
available that may provide a cost-effective answer to your service needs.
Whether providing warranty repair service or any of the other services listed
below, Tektronix service technicians, trained on Tektronix products, are best
equipped to service your program monitor system. Tektronix technicians are
appraised of the latest information on improvements to the product as well as the
latest product options.
Warranty Repair Service
Repair Service
Self Service
Tektronix warrants this product for one year from the date of purchase. (The
warranty appears after the title page and copyright page in this manual.)
Tektronix technicians provide warranty service at most Tektronix service
locations worldwide. Your Tektronix product catalog lists all service locations
worldwide.
Tektronix offers single per-incident and annual maintenance agreements that
provide Depot Service repair of this product.
Of these services, the annual maintenance agreement offers a particularly
cost-effective approach to service for many owners of the PQM300 Program
QoS Monitor. Such agreements can be purchased to span several years.
Tektronix supports repair to the module level by offering a Module Exchange
program.
Module Exchange. This service reduces down time for repair by allowing you to
exchange most modules for remanufactured ones. Tektronix ships you an
updated and tested exchange module from the Beaverton, Oregon, service center.
Each module comes with a 90-day service warranty.
xviii
For More Information. Contact your local Tektronix service center or sales
engineer for more information on any of the repair or adjustment services
previously described.
PQM300 Program QoS Monitor Service Manual
Contacting Tektronix
Introduction
Phone1-800-833-9200*
AddressTektronix, Inc.
Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
Web sitewww.tektronix.com
Sales support1-800-833-9200, select option 1*
Service support1-800-833-9200, select option 2*
Technical supportEmail: techsupport@tektronix.com
1-800-833-9200, select option 3*
1-503-627-2400
6:00 a.m. – 5:00 p.m. Pacific time
*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.
PQM300 Program QoS Monitor Service Manual
xix
Introduction
xx
PQM300 Program QoS Monitor Service Manual
Specifications
Specifications
Product Description
This section lists the electrical, physical, and environmental characteristics of the
PQM300 Program QoS Monitor.
NOTE. Version 2.0 of the PQM300 application software must be installed to
support the Alarm Relay board and the Local Control Flat Panel Display
options.
The program monitor is implemented on a platform that uses Microsoft’s
Windows NT operating system. Operating an a networked system, the PQM300
program monitor application is configured to begin automatically after the
power-on initialization and program loading are completed.
An optional SVGA monitor can be connected for a local display and the program
monitor can be controlled using a keyboard and a mouse.
The PQM300 program monitor provides program service quality assessments of
live Rec. 601 digital video signals. Quality of Service (QoS) monitoring
provides the following assessments and capabilities:
MPEG Defects
HReal-time MPEG defect (Discrete Cosine Transform based blockiness
artifacts) monitoring and reporting when a signal is present. The PDI level
(Picture Defect Indicator) provides immediate and continuous indication of
the video image quality.
HFixed (manual) setting of blockiness period for a given pixel block size for
the MPEG defects measurement.
HAdaptive settings to automatically determine blockiness periods used for the
MPEG defects measurement.
HPeriod selection to monitor the detected blockiness period. This is a tool to
find the correct period for the fixed period setting and to monitor the
incoming video for blockiness period changes.
HRepeated frame found in a moving sequence
HAbsence of a serial digital video signal
HAbsence of video content on the input
Uncorrelated Noise
HIndicates the amount of white Gaussian noise in the video signal (such as
that injected by analog video circuits)
Alarm Level Monitoring
HIndividual alarm settings for all measurements (including blockiness period)
HLevel thresholds for amplitude of error
HTime thresholds in number of fields for duration of error condition
HPercentage thresholds for an amount of error within a defined time threshold
Remote Control and Networking
HWeb Browser control and monitoring of any program monitor accessible
over a TCP/IP network. Access is through the Netscape (4.5 or higher) or the
Internet Explorer (4.0 or higher) Web browser. An applet provides a remote
user interface to make all the configuration setups and display the measure-
ment results.
HSNMP agent (Simple Network Management Protocol) and MIB (manage-
ment information base) for integration into an existing SNMP infrastructure
to monitor picture quality from a central control point
HMulti-machine networking. A networked Windows NT PC or a PQM300
program monitor with local display, keyboard, and mouse, can be used to
control and monitor all PQM300 program monitors accessible over the
network.
NOTE. A locally attached SVGA monitor, mouse, and keyboard are used for the
initial set up of the PQM300 Program QoS Monitor.
Continuous Measurements
1–2
Measurements run continuously to monitor program quality in real-time. An
operator at a central control station can control the operation of the program
monitor installed in a system network.
PQM300 Program QoS Monitor Service Manual
Specification Tables
Specifications
The tables list the specifications for the PQM300 Program QoS Monitor. All
specifications are guaranteed unless labeled typical. Typical specifications are
provided for your convenience but are not guaranteed. Specifications marked
with the n symbol are checked in the Performance Verification procedures
given in this manual.
The following definitions describe the information you will find in the specification tables.
HSpecification. A document or a section of a document that lists and
describes characteristics and performance requirements of equipment and
certain programming material.
HCharacteristic. A property of the product.
HDescription. A statement that describes a characteristic usually in limit
form. This statement is considered to be binding on the company (seller),
and can be verified by performing the appropriate portion of the Performance
Verification Procedure, or by a separate and available procedure.
HSupplemental information. Statements that explain performance require-
ments or provide performance information. These are not considered to be
statements of guaranteed performance and are not ordinarily supported by a
performance check.
Performance Conditions
The Performance requirements are valid within the environmental limits if the
instrument was adjusted at 25_ C ± 5_ C and you allowed a minimum warm-up
time of 20 minutes.
Hardware Specifications
T able 1–1: Program monitor DSP board
CharacteristicDescriptionSupplemental information
Input Signal Format nReceives 270 MB/s serial digital signalComplies with ITU–R BT.601, BT.656, and
SMPTE 259M.
Channel 1: Main In and Main OutActive loop-through, BNC, 75 W termi-
nating
Channel 2: Ref In and Ref OutActive loop-through SMB, 75 W terminating
Channel 1 to Channel 2 Isolation 30 dB to 300 MHz
PQM300 Program QoS Monitor Service Manual
1–3
Specifications
T able 1–1: Program monitor DSP board (Cont.)
CharacteristicSupplemental informationDescription
Channel SynchronizationThe two inputs are asynchronous
Input Return LossAt least 15 dB (1 MHz to 270 MHz), with
power on.
Serial Receiver Equalization RangeProper operation with coaxial cable up to
14.5 dB loss at 135 MHz. Typical operation;
to 300 meters with Belden 8281 coaxial
cable.
Active loop-through output characteristicsMeets SMPTE 259M levels and rise and
fall times. No reclocking is done on
loop-through output.
Loop Output Return LossAt least 15 dB (1 MHz to 270 MHz), with
power on.
Output Signal Format n270 MB/s serial digital signalComplies with ITU–R BT.601, BT.656, and
SMPTE 259M. Exception: output frequency
accuracy only specified when not refer-
enced to an external input signal.
Output impedance75 W
Return LossAt least 15 dB (1 - 270 MHz), with power
on.
Output level n800 mV ± 50mV
Rise/Fall0.3 ns to 1.2 ns, measured 20% to 80%
Jitter – Internal ReferenceLess than 0.2 UI, typically 0.3 ns peak-to-
peak.
Jitter – External ReferenceDepends on the reference input. Typically
peaking at 0.05 dB. Jitter attenuation 3 dB
point is typically at 650 kHz.
Frequency n270 Mbits/s (27 MHz clock is checked)
Frequency accuracy±1.5 ppm over temperature range plus
±1 ppm per year drift, when using the
internal oscillator.
Output connectorBNC
DSP memory256 MB fast SDRAM
T able 1–2: PQM3F01 NTSC/PAL composite decoder board
CharacteristicPerformance requirementSupplemental information
Input Channels
Video Format nNTSC, NTSC No Setup, PAL (B, D, G, H,
and I)
1–4
PQM300 Program QoS Monitor Service Manual
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