Technical Reference
TDS3SDI 601 Digital Video Application Module
071-0689-00
This document supports firmware version 2.20
and above.
www.tektronix.com
Copyright © Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
DPX is a trademark of Tektronix, Inc.
WARRANTY SUMMARY
T ektronix warrants that the products that it manufactures and sells will be free from defects
in materials and workmanship for a period of three (3) years from the date of shipment
from an authorized Tektronix distributor. If a product proves defective within the
respective period, T ektronix will provide repair or replacement as described in the complete
warranty statement.
To arrange for service or obtain a copy of the complete warranty statement, please contact
your nearest Tektronix sales and service office.
EXCEPT AS PROVIDED IN THIS SUMMARY OR THE APPLICABLE WARRANTY
STATEMENT, TEKTRONIX MAKES NO WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL TEKTRONIX BE LIABLE FOR INDIRECT, SPECIAL OR
CONSEQUENTIAL DAMAGES.
Table of Contents
General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started
Installing the Application Module Firmware 1. . . . . . . . . . . . . .
Installing the Application Module 4. . . . . . . . . . . . . . . . . . . . . . .
Checking Module Installation 7. . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Module Installation 8. . . . . . . . . . . . . . . . . . . . .
Operating Basics
The 601 Digital Video Module 9. . . . . . . . . . . . . . . . . . . . . . . . .
601 Digital Video Feature Overview 10. . . . . . . . . . . . . . . . . . . . .
Accessing 601 V ideo Functions 12. . . . . . . . . . . . . . . . . . . . . . . . .
Reference
601 Digital Video Application Module Conventions 15. . . . . . . .
V ideo QuickMenu 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternating Trigger Source Function 22. . . . . . . . . . . . . . . . . . . . .
New Functions in the Video Trigger Menu 23. . . . . . . . . . . . . . . .
New Apps > 601 Module Menu 27. . . . . . . . . . . . . . . . . . . . . . . .
New Functions in the Display Graticule Menu 28. . . . . . . . . . . . .
Changes to the Acquire Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . .
Examples 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix
Appendix A: Specifications 43. . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDS3SDI 601 Digital Video Technical Reference
i
Table of Contents
ii
TDS3SDI 601 Digital Video Technical Reference
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.
To Avoid Fire or Personal Injury
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.
Safety Terms and Symbols
Terms in This Manual. The following term appears in this manual:
CAUTION. Caution statements identify conditions or practices that
could result in damage to this product or other property.
TDS3SDI 601 Digital Video Technical Reference
iii
General Safety Summary
Preventing Electrostatic Damage
CAUTION. Electr ostatic discharge (ESD) can damage components in
the oscilloscope and its accessories. To prevent ESD, observe these
precautions when directed to do so.
Use a Ground Strap. Wear a grounded antistatic wrist strap to
discharge the static voltage from your body while installing or
removing sensitive components.
Use a Safe Work Area. Do not use any devices capable of generating or
holding a static charge in the work area where you install or remove
sensitive components. Avoid handling sensitive components in areas
that have a floor or benchtop surface capable of generating a static
charge.
Handle Components Carefully. Do not slide sensitive components over
any surface. Do not touch exposed connector pins. Handle sensitive
components as little as possible.
Transport and Store Carefully. Transport and store sensitive components
in a static-protected bag or container .
iv
TDS3SDI 601 Digital Video Technical Reference
Preface
The TDS3SDI 601 Digital Video application module provides
additional functions to the TDS3000 series Digital Phosphor
Oscilloscope. These new functions make it easier to capture, display,
and measure video waveforms from both broadcast and non-broadcast equipment.
This T echnical Reference describes the capabilities, operation, and
applications of the 601 Digital Video module. The following table
shows where to find information in this manual.
If you are looking for: Turn to:
Installation information Installing the Application Module
Product overview The 601 Digital Video Module on
Firmware on page 1
page 9
Basic operating instructions Accessing 601 Video Functions on
page 12
Function details Reference section starting on page 15
Application examples Examples section starting on page 32
TDS3SDI 601 Digital Video Technical Reference
v
Preface
Contacting Tektronix
Product
support
Service
support
Toll–free
Number
For questions about using Tektronix measurement
products, call toll free in North America:
1-800-833-9200
6:00 a.m. – 5:00 p.m. Pacific time
Or contact us by e-mail:
support@tektronix.com
For product support outside of North America,
contact your local Tektronix distributor or sales
office.
Tektronix offers a range of services, including
Extended Warranty Repair and Calibration services.
Contact your local Tektronix distributor or sales
office for details.
For a listing of worldwide service centers, visit our
web site.
In North America:
1-800-833-9200
An operator can direct your call.
vi
Postal
Address
Web site
Tektronix, Inc.
Department or name (if known)
P.O. Box 500
Beaverton, OR 97077
USA
www.tektronix.com
TDS3SDI 601 Digital Video Technical Reference
Getting Started
This section describes how to install and check the TDS3SDI 601
Digital Video application module.
Installing the Application Module Firmware
NOTE. You must do the firmware installation procedure the first time
you install a new application module. If you do not update the
oscilloscope firmware, the new application module may not function
at all, or may not function correctly. It is strongly recommended that
you install new firmware when the oscilloscope determines an update
is necessary .
To install the application module firmware, do these steps:
1. Save any oscilloscope settings and/or reference waveforms to
floppy disk before doing these steps.
2. Turn the oscilloscope power off.
3. If the application module came with one or more floppy disks,
insert floppy disk 1 into the floppy disk drive.
4. Power on the oscilloscope. The oscilloscope checks if a firmware
update is required. If an update is required, go to page 2. If an
update is not required, got to page 3.
TDS3SDI 601 Digital Video Technical Reference
1
Getting Started
Firmware Update Required
1. Push OK Load New Firmware to begin loading the firmware.
If a firmware update is necessary, the oscilloscope displays the
following message:
“This procedure will replace the firmware in the instrument with
firmware from the floppy disk. This procedure will take
approximately 5 minutes.
Caution: Do not turn the instrument off or eject the floppy disk
until prompted.
Push ‘OK Load New Firmware’ to proceed.
Push MENU OFF to abort this procedure.”
The oscilloscope shows a clock icon on the screen while loading
the firmware. If a second firmware floppy disk is required, the
oscilloscope will instruct you to eject the first disk and insert the
second disk.
If you do not want to upgrade the firmware, push MENU OFF.
When the firmware upgrade is complete, the oscilloscope will
restart automatically with the new firmware.
NOTE. If you power off the oscilloscope, eject the floppy disk before
prompted, or there is a power outage during the firmware upgrade
process, you must restart the firmware upgrade procedure starting at
step 2 on page 1.
2
TDS3SDI 601 Digital Video Technical Reference
Getting Started
2. The oscilloscope may also display the following message:
“WARNING! This instrument is not calibrated. You must run
Signal Path Compensation (SPC) in order to calibrate the
instrument.
SPC is adversely affected by input signals with AC components.
Disconnect or otherwise remove these signals prior to running
SPC. SPC will take approximately 10 minutes to run.
Push ‘OK Compensate Signal Paths’ to begin the calibration
procedure. Or, you may run SPC in the UTILITY Cal menu.”
3. If the instrument has been operating for 20 minutes or longer in
the ambient temperature at which it will be used, disconnect all
signals and push OK Compensate Signal Paths to run SPC. You
can also ignore this step for now and run SPC at a later time.
4. Proceed to step 1 of Firmwar e Update Not Necessary (below) to
finish the installation.
Firmware Update Not Required
If a firmware update is not necessary, the oscilloscope displays
the following message:
“A floppy disk containing instrument firmware has been detected.
However, the firmware on the disk is not newer than the
instrument firmware. Therefore, no firmware upgrade is required.
Push MENU OFF to remove this message”
1. Push the MENU OFF button.
2. Eject the floppy disk.
3. You are done installing the firmware. Go to to Installing the
Application Module on page 4.
TDS3SDI 601 Digital Video Technical Reference
3
Getting Started
Installing the Application Module
The following figures show how to install the TDS3SDI application
module.
CAUTION. Turn off power before installing or removing a module. To
avoid damaging the oscilloscope or application module, observe the
ESD precautions described on page iv.
4
TDS3SDI 601 Digital Video Technical Reference
Getting Started
ITU-R 601
TDS3SDI 601 Digital Video Technical Reference
5
Getting Started
CH 2
CH 3
CH 4
6
TDS3SDI 601 Digital Video Technical Reference
Checking Module Installation
Do these steps to check that the TDS3SDI 601 Digital Video
application module and firmware are correctly installed.
1. Power on the oscilloscope. Look at the oscilloscope startup
screen; it should list the 601 module. If the oscilloscope displays
a message stating that there is incompatible firmware, power off
the oscilloscope and do the steps in the Installing the Application
Module Firmware, starting at step 2 on page 1.
2. Push the QUICKMENU panel button.
3. Push the Menu bottom button to select Video.
4. Push the SUBMENU bottom button to check that it displays
SDTV/HDTV and ITU-R 601.
Getting Started
If the oscilloscope does not show these menu items, go to Trouble-
shooting Module Installation on page 8.
NOTE. You do not need to reinstall the firmware if you remove and
reinstall an application module. However, the featur es provided by
that application module are not available until you reinstall the
module.
TDS3SDI 601 Digital Video Technical Reference
7
Getting Started
Troubleshooting Module Installation
If the oscilloscope does not recognize the application module at
power-up, do these steps:
1. Turn off the oscilloscope.
2. Following the ESD precautions listed on page iv, remove the
application module.
3. Examine the oscilloscope and application module contacts for
damage.
4. Reinstall the application module into the oscilloscope.
5. Reinstall the firmware (page 1).
6. Turn on the oscilloscope. If the oscilloscope still does not display
the application menu items as listed in Checking Module
Installation, power off the oscilloscope and contact the nearest
Tektronix service center.
8
TDS3SDI 601 Digital Video Technical Reference
Operating Basics
This section describes the features of the 601 Digital Video
application module and how to access the new video functions.
The 601 Digital Video Module
The following figure and table describe the 601 Digital Video
module connectors and indicators.
1 234
Item Description
1 15-pin connector for analog component signal output. Connect the
output to oscilloscope channels 2 through 4 using the supplied cable
assembly.
2 BNC connector for composite video output signal. Connects to channel
1 of the oscilloscope. You can also connect this signal to a video
monitor.
3 BNC connector for 601 video signal input.
4 Green LED that lights when the module recognizes a valid 601 video
signal.
TDS3SDI 601 Digital Video Technical Reference
9
Operating Basics
601 Digital Video Feature Overview
This section provides an overview of the 601 Digital Video module
features.
ITU-R BT.601 Signal Conversion
The 601 Digital Video module converts serial digital video to analog
video composite and component (RGB or YPbPr) signals connected
to the oscilloscope inputs. The 601 digital video functions also
provide error detection and counting, as well as signal equalization
for remotely-connected video equipment signals (typically up to 250
meters of Belden 8281 or equivalent cable).
Video QuickMenu
Use the video QuickMenu to display bottom and side menus that
contain commonly-used video functions useful for displaying and
measuring video signals.
Video Autoset
Use the autoset function to automatically adjust the vertical,
horizontal, and video trigger settings to display a video waveform
triggered on all lines or fields. You can then manually adjust controls
to optimize the display.
Vectorscope
Use the Vectorscope function with 100% and 75% color bars to
analyze 601 digital, standard video, or analog HDTV color
difference video signals using a familiar display format.
10
TDS3SDI 601 Digital Video Technical Reference
Operating Basics
Video Picture
Use the Video Picture function to display a monochrome picture of a
composite or luminance video signal.
Video Graticules
Use the video graticule functions to change the standard oscilloscope
graticule to either IRE (for 525/NTSC signals) or mV (for PAL/SECAM or component signals) with the vertical scale set to 143
mV/div. The video graticules include labeled marks for manual
component signal measurement. The standard graticules are also
available.
Trigger On Specific Lines (Line Select)
Use the trigger on lines function to trigger the oscilloscope on
specific lines in broadcast and non-broadcast (custom) video
waveforms.
Analog HDTV
Use the analog HDTV functions to trigger the oscilloscope on
different HDTV formats.
Field Holdoff
Use the field holdoff function to specify a number of fields to wait
before re-enabling triggering. This lets the oscilloscope always
trigger on a single field (for example, field 1 or field 3 of NTSC)
instead of on both field 1 and field 3.
Custom Video
Use the custom video function to specify custom horizontal scan
rates in order to trigger on non-broadcast video waveforms, such as
those used by computer monitors and medical equipment displays.
TDS3SDI 601 Digital Video Technical Reference
11
Operating Basics
Accessing 601 Video Functions
The following text describes how to access the new 601 Digital
Video module functions in the menu system. Go to the Reference
section of this manual for more information on the individual
function menus.
Video QuickMenu
The video QuickMenu contains bottom and side menu items that are
useful for quickly displaying and measuring analog SDTV/HDTV
and 601-encoded video signals. Vectorscope and Video Picture are
accessible from the video QuickMenu.
To display the video QuickMenu, do these steps:
1. Push the QUICKMENU panel button.
2. Push the Menu bottom button to select Video.
3. Push the SUBMENU button to select a video signal standard
(SDTV/HDTV or ITU-R 601) and display bottom and side
menus.
ITU-R 601 Settings in the UTILITY > Apps Menu
To access the 601 Digital Video functions, do these steps:
1. Push the UTILITY panel button.
2. Push the System bottom button to select Apps.
3. Push the Module button to select ITU-R 601. The bottom and
side menus change to show the 601 functions.
12
TDS3SDI 601 Digital Video Technical Reference
Operating Basics
Video T rigger Settings in the Trigger Menu
To access the new video trigger functions, do these steps:
1. Push the Trigger MENU panel button.
2. Push the Type bottom button to select Video. The new video
trigger functions are part of the Standard trigger menus.
NOTE. There are no ITU-R 601 functions in the Trigger menu.
Video Autoset Settings in the Acquire Menu
Video Autoset automatically sets up the oscilloscope to trigger and
display a composite video waveform. You can run video Autoset
from the Acquire menu or the video QuickMenu.
NOTE. Video Autoset is only available through the ACQUIRE or
QuickMenu menus. The AUTOSET fr ont-panel button always runs
the standard oscilloscope edge-trigger autoset function.
To access the video autoset function from the Acquire menu, do
these steps:
1. Push the Acquire MENU front panel button to display the
Acquire menu.
2. Push the Autoset bottom button to display the Autoset side menu.
3. Push the Video Autoset side button to automatically display a
composite video waveform triggered on all lines.
TDS3SDI 601 Digital Video Technical Reference
13
Operating Basics
Vectorscope and Video Picture in the DISPLAY Menu
To access Vectorscope or V ideo Picture functions from the Display
menu, do the following:
1. Push the DISPLAY panel button.
2. Push the Video Picture bottom button to display the Video
Picture side menu.
3. Push the Vectorscope bottom button to display the Vectorscope
side menu.
NOTE. The DISPLAY Video Picture menu lets you change the picture
contrast and brightness settings. These settings are not available in
the video QuickMenu.
Video Graticules (IRE/mV) in the DISPLAY Menu
To change the screen graticule to IRE or mV format, do the
following:
1. Push the DISPLAY panel button.
2. Push the Graticule bottom button to display the graticule side
menu. Push the -More- button to display the IRE and mV buttons
if they are not already displayed.
3. Select IRE or mV on the side menu.
14
TDS3SDI 601 Digital Video Technical Reference
Reference
The 601 Digital Video application module affects the functions of
several menus. The following sections describe these changes in
more detail.
601 Digital Video Application Module Conventions
The following conventions apply to one or more of the 601 Digital
V ideo functions:
H This firmware update adds alternating trigger source capability to
the oscilloscope. Refer to page 22 for an explanation of the
alternating trigger source function.
H You can use other menus while using the video QuickMenu. For
example, you can push the MEASURE button to set up and take
waveform measurements, and then push the QUICKMENU
button to return to the video QuickMenu.
H You cannot use video triggering to arm B triggering.
H You can trigger on and view SDTV and HDTV analog signals.
The 601 Digital Video module does not convert HDTV digital
formats (SMPTE 292M) to analog.
H The oscilloscope does not have video signal clamping. Tektronix
offers an optional Video Display Clamp module (part number
013-0278-00) that provides video signal clamping.
H The TDS3SDI module is optimized for the TDS3054 DPO
oscilloscope. The module provides reduced performance in other
TDS3000 Series oscilloscopes.
TDS3SDI 601 Digital Video Technical Reference
15
Reference
Video QuickMenu
The 601 Digital Video application module provides a QuickMenu for
video functions. Video QuickMenu bottom and side menu items
contain key video-related functions to let you quickly acquire,
display, and measure video signals. The following tables describe the
video QuickMenu.
16
There are two video types in the SUBMENU button: ITU-R 601 and
SDTV/HDTV. The following menu descriptions apply to both video
types unless marked otherwise.
TDS3SDI 601 Digital Video Technical Reference
Video QuickMenu: bottom menu
Reference
Menu Item
SUBMENU SDTV/HDTV
AUTOSET
ACQUIRE
(SDTV/HDTV
only)
Value(s) Description
ITU-R 601
Lines
Fields
YPbPr
RGB
YC
(601 only)
Fast Trig Sets the acquisition mode to Fast Trigger
Normal Sets the acquisition mode to Normal (10K
Displays the bottom and side menu items for
the selected video standard.
Automatically displays a video graticule and
adjusts the vertical, horizontal, and video trigger
settings to display a video waveform triggered
on all lines or all fields.
Automatically adjusts the vertical, horizontal,
and video trigger settings to display the
selected component waveforms.
(500 points).
points).
TDS3SDI 601 Digital Video Technical Reference
17
Reference
Video QuickMenu: bottom menu (cont.)
Menu Item DescriptionValue(s)
DISPLAY:
Waveform
DISPLAY:
Vectorscope
DISPLAY:
Picture
(SDTV and
601 only)
Full Turns off the Vectorscope or Video Picture and
displays waveforms using the the full graticule.
IRE
mV
75%
100%
On
Off
Turns off the Vectorscope or Video Picture,
displays an IRE or mV video graticule, and sets
the vertical scale to 143 mV/div.
Enables Vectorscope mode and selects 75% or
100% color bars. Select DISPLAY: Waveform
or DISPLAY:Picture to turn off Vectorscope.
Turns on or off the Video Picture, which
displays an image of the composite or
luminance signal connected to channel 1. Video
Picture is not available when triggering on
SECAM, Custom, or HDTV signals.
Turning Picture Off returns the oscilloscope to
the state prior to turning Picture On, except for
any values changed while in Video Picture
mode.
18
Key Points
DISPLAY Waveform. Pushing the Waveform button automatically turns
off Video Picture or Vectorscope.
TDS3SDI 601 Digital Video Technical Reference
Reference
DISPLAY Vectorscope. Pushing the Vectorscope button the first time
enables the Vectorscope. Subsequent button pushes selects 75% or
100% color bars.
The Vectorscope mode uses the oscilloscope XY mode; therefore, all
XY restrictions as listed in the TSD3000 Series Digital Phosphor
Oscilloscope User Manual apply to Vectorscope.
Video QuickMenu Side Menu Items
The side menu items are the same for both video submenu types
(ITU-R 601 and SDTV/HDTV) unless marked otherwise.
Video QuickMenu: side menu
Side Menu
Item
Value Description
Format
(SDTV/
HDTV only)
Standard
(SDTV only)
(HDTV only) 1080i 60 50
Holdoff Time Sets the trigger holdoff time value. Use the
SDTV
HDTV
525/NTSC
625/PAL
SECAM
1080p 24 25
1080/24sF
720p/60
480p/60
Sets the oscilloscope to trigger on standard
(SDTV) or high-definition (HDTV) analog video
signals.
Sets the SDTV video standard on which to
trigger. Displayed when SDTV is selected in the
Format side menu.
Sets the HDTV analog video standard on which
to trigger. Displayed when HDTV is selected in
the Format side menu.
general purpose knob to change the holdoff time
value.
TDS3SDI 601 Digital Video Technical Reference
19
Reference
Video QuickMenu: side menu (cont.)
Side Menu
Item
DescriptionValue
Holdoff
(cont.)
Source
(SDTV/
HDTV only)
Field/Line
EDH
(601 only)
Fields Sets the trigger holdoff fields value. Use the
general purpose knob to change the holdoff
fields value, from 0 to 8.5 fields, in increments of
0.5.
Ch 1 2 3 4
Ch 1 2
Even Triggers the oscilloscope on all even video fields.
Odd Triggers the oscilloscope on all odd video fields.
All Fields
All Lines
O/E Line n Triggers the oscilloscope on a specific video field
On Off Turns on or off EDH detection and error count
Sets which input to use for triggering the
oscilloscope. To trigger on alternating video
signal sources, use the front-panel Trigger menu.
Triggers the oscilloscope on all fields or all lines.
(Odd or Even for 525/NTSC) and line number
(n). Use the general purpose knob to change the
line value.
status readouts. Turning EDH on resets the error
count to zero.
20
Input
(601 only)
525
625
Auto
Detect
Sets the oscilloscope to decode and trigger on
525 or 625-line video signals.
Sets the oscilloscope to automatically detect and
trigger on either 525 or 625-line video signals.
TDS3SDI 601 Digital Video Technical Reference
Reference
Key Points
601 Autoset. While in 601 mode, pushing AUTOSET Lines/Fields
turns off 601 module component signal output, turns off oscilloscope
channels 2 through 4, and turns on oscilloscope channel 1 to display
the composite video waveform. Pushing AUTOSET YPbPr/RGB/
YC turns on 601 module component signal output, turns off
oscilloscope channel 1, and turns on channels 2 through 4 (or 3 and 4
for YC) to display the component signal waveforms.
601 Signal Strength Meter. The ITU-R 601 QuickMenu displays a small
signal strength meter directly above the side menus. The meter
shows relative strength of the 601 digital signal. The 601 module
equalizes weak input signals.
No Signal
No signal Weak signal Strong signal
Video Submenus and Triggers. Selecting a submenu (ITU-R 601 or
SDTV/HDTV) does not automatically enable the corresponding
video trigger . Because some video signal types have more than one
video standard, you must select a video standard in the side menu to
trigger on that type of video signal.
The oscilloscope uses the currently-enabled video trigger setting
until you select a new trigger. For example, if you are triggering on
an HDTV signal, then select the ITU-R 601 submenu, the oscilloscope continues to use the HDTV trigger setting until you select a
trigger in the ITU-R 601 side menu.
TDS3SDI 601 Digital Video Technical Reference
21
Reference
AUTOSET Lines/Fields and Trigger All Lines/All Fields. The AUTOSET
Lines/Fields functions (video QuickMenu bottom menu) differ from
the All Fields/All Lines side menu functions in that the AUTOSET
Lines/Fields functions change a number of instrument settings in
addition to the video trigger type. The All Fields/All Lines side menu
only changes the video trigger type.
Alternating Trigger Source Function
Alternating trigger source is an edge-trigger function that uses each
active channel as a trigger source in turn, starting with the lowestnumbered active channel and going to the highest-numbered active
channel. The alternating trigger source function is available in all
oscilloscope edge-type trigger menus (video or normal oscilloscope
modes) excluding logic triggers, whether or not the 601 Digital
Video module is installed.
Alternating trigger source uses the current trigger settings to trigger
on each active channel; there is no separate trigger setup for each
channel. Also, alternating source does not use EXT or Line signals as
trigger sources.
NOTE. Due to image persistence, all active channels may appear to
display simultaneously. However, this does not mean that the
displayed signals are synchronized.
Because alternating trigger uses the same trigger settings for all
source signals, the trigger settings must be able to trigger on all
active signals. If one or more of the source signals do not meet the
trigger settings, the oscilloscope either waits for that source channel
to trigger (Normal trigger mode) or autotriggers (Autotrigger mode).
22
TDS3SDI 601 Digital Video Technical Reference
New Functions in the Video Trigger Menu
The 601 Digital Video application module adds the following
functions to the video trigger menu (Trigger MENU > Type=Video):
Standard menu Bottom menu New/changed side menu
Reference
525/NTSC
625/PAL
SECAM
HDTV (new)
Custom (new)
HDTV Format Displays a list of analog HDTV signal
(new) formats on which to trigger.
Custom
(new)
Source Alternating (all active channels). Refer
to page 22 for a description of the
alternating trigger source function.
Trigger On
Mode & Holdoff Holdoff (Fields). Refer to page 24 for a
Trigger On
Scan Rate Displays custom horizontal scan rate
Line Number and Odd/Even fields.
Refer to page 25 for a description.
description.
Progressive/Interlaced: Sets to trigger
on interlaced or progressive (non-interlaced) video waveforms.
Odd/Even: Sets to trigger on odd or
even fields. Only enabled when
Interlaced is selected.
ranges on which to trigger.
TDS3SDI 601 Digital Video Technical Reference
23
Reference
Key Points
Holdoff (Fields). This function lets you specify a number of fields to
wait before re-arming the video trigger. For example, when you
select to trigger on odd fields, the oscilloscope triggers on all
odd-numbered fields (1 and 3 for NTSC signals; 1, 3, 5, and 7 for
PAL/SECAM signals). However, the default video trigger cannot
trigger on just odd field 1.
Default: trigger on an odd field triggers on
all odd fields (example NTSC signal).
T T T
Field 1 Field 2 Field 3 Field 4 Field 1 ...
T
= Trigger points
You can use the Holdoff Field function to trigger the oscilloscope on
the same field. The holdoff process begins when the oscilloscope
recognizes a video trigger event. The oscilloscope acquires the signal
and disables the trigger system until the specified number of fields
have passed. The oscilloscope then re-arms the video trigger system
and waits for the next valid video trigger . This enables the oscilloscope to always trigger on the same field.
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TDS3SDI 601 Digital Video Technical Reference
Holdoff Field: holding off 2.5 fields triggers on
the same odd field (example NTSC signal).
Holdoff Fields = 2.5
Reference
T
Field 1 Field 2 Field 3 Field 4 Field 1 ...
T
= trigger points
= Video trigger armed
Triggers are not recognized
T
during holdoff
Although Holdoff Field triggering enables you to trigger on the same
field, it does not allow you to specify the exact field on which to
trigger. Use the SINGLE SEQ button to retrigger the oscilloscope on
a particular field.
Trigger On Odd/Even Line Number. Sets the specific video field (Odd or
Even) and line number on which to trigger . Use the general purpose
knob to change values.
For 525/NTSC, the range of line values is 1 through 263 for odd
fields, and 1 through 262 for even fields. Increasing the line count
when at odd field line 263 changes the setting to even field line 1.
You can also push the Odd/Even button to switch between odd and
even lines of the same line number .
For 625/PAL and SECAM, the range of line values is 1 through 625.
Increasing the line count when at line 625 changes the setting to
line 1.
TDS3SDI 601 Digital Video Technical Reference
25
Reference
HDTV Format. The HDTV Format function lets you select the analog
HDTV signal format on which to trigger . Available HDTV formats
are:
Format Description
1080i/60 1080 active lines, 1125 lines, 1920 x 1080 pixel, interlaced, 60 fps
1080i/50 1080 active lines, 1125 lines, 1920 x 1080 pixel, interlaced, 50 fps
1080p/24 1080 active lines, 1125 lines, 1920 x 1080 pixel, progressive,
24 fps
1080/24sF 1080 active lines, 1125 lines, 1920 x 1080 pixel, progressive
(segmented frame), 24 fps
1080p/25 1080 active lines, 1125 lines, 1920 x 1080 pixel, progressive,
25 fps
720p/60 720 active lines, 750 lines, 1280 x 720 pixel, progressive, 60 fps
480p/60 480 active lines, 525 lines, 640 or 704 x 480 pixel, progressive, 60
fps
Custom. The Custom video menu lets you select horizontal scan rate
ranges to view non-broadcast video waveforms from security,
computer, and medical equipment. Scan Rate sets the oscilloscope to
search for negative sync pulses within the selected range.
Rate 1
15-20 kHz
Rate 2
20-25 kHz
Rate 3
25-35 kHz
Rate 4
35-50 kHz
Rate 5
50-65 kHz
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TDS3SDI 601 Digital Video Technical Reference
NOTE. While you are in custom video mode, the Trigger On Line
Number function’s range of values is 1 to 3000.
The oscilloscope can display video waveforms for signals with scan
rates greater than 65 kHz. However, the waveform data (such as line
count) may not be accurate because the oscilloscope is triggering on
the next-detected sync pulse. The oscilloscope may miss some sync
pulses when scan rates are greater than 65 kHz.
New Apps > 601 Module Menu
The 601 Digital Video module adds a new selection (ITU-R 601) to
the Utility > System > Apps > Module menu. The following table
describes the new menu functions. Most of these functions are
available in the video QuickMenu.
Reference
Bottom Side Description
Input Auto
Detect
525
625
Autoset Lines
Fields
Sets the module to automatically detect and trigger
on a 525 or 625 video standard signal.
Sets the module to decode and trigger on either 525
or 625 video waveforms.
Automatically displays a video graticule and adjusts
the vertical, horizontal, and video trigger settings to
display a video waveform triggered on all lines or all
fields.
TDS3SDI 601 Digital Video Technical Reference
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Reference
Bottom DescriptionSide
Autoset
(cont.)
Error
Detection
YPbPr
RGB
YC
On
Off
EDH
Detected
Errors Status readout that lists the total number of EDH
Set to 0 Resets the error count to zero.
Automatically adjusts the vertical, horizontal, and
video trigger settings to display the selected
component waveforms. Each menu item lists which
component signal is connected to which oscilloscope
channel.
Turns on or off detecting and counting EDH signal
errors.
Status readout that indicates if an error detection
handling (EDH) signal is present in the 601-encoded
data.
errors.
New Functions in the Display Menu
The 601 Digital Video module adds the following functions to the
DISPLAY menu. All of these functions are available in the video
QuickMenu.
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Bottom Side Description
Graticule IRE
(new)
mV
(new)
Displays an IRE measurement graticule and sets
the vertical scale to 143 mV/div.
Displays a mV measurement graticule and sets
the channel vertical scale to 143 mV/div.
TDS3SDI 601 Digital Video Technical Reference
Bottom DescriptionSide
Reference
Video
Picture
(new)
Picture
On Off
Auto Contrast
On Off
Contrast Adjusts the video picture contrast from 0
Brightness Adjusts the video picture brightness from 0
Line
Number
Turns on or off displaying a 4:3 ratio monochrome picture of the luminance or composite
video signal connected to channel 1. Use this
function to verify the signal source.
Turns on or off automatic contrast adjustment for
the Video Picture mode. The Contrast and
Brightness menu items are not selectable when
Auto Contrast is On.
(minimum) to 100 (maximum). The default value
is 54.
(minimum) to 100 (maximum). The default value
is 41.
Displays the current video trigger line number
(and even/odd field value for NTSC). This value
corresponds to the position of the horizontal line
drawn on the picture.
You can use the general purpose knob to change
these values. You can also push the side menu
button to toggle between even and odd line
numbers for NTSC signals.
TDS3SDI 601 Digital Video Technical Reference
29
Reference
Bottom DescriptionSide
Vectorscope
(new)
Off Turns off vectorscope display format.
Ch N vs Ch N
(Pb vs Pr)
Color Bars Sets vectorscope display for 75% or 100% color
Turns on the vectorscope display format. The
menu item shows which component signal
connects to which input channel, where N is the
oscilloscope channel. The input channels are not
user-selectable.
bars.
Key Points
IRE and mV Graticules. Both graticules include labeled graticule marks
that are useful for measuring component signals. Also, Hbar-cursor
values are shown in IRE units when the IRE graticule is active.
NOTE. Changing from the IRE or mV graticule to any other graticule
style does not reset the volts/division scale from 143 mV. Use the
Vertical SCALE knob to change the volts/division setting when
changing to a non-video graticule.
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Video Picture. Video Picture mode does not display a picture for
SECAM, Custom, or analog HDTV signals. Also, many of the
oscilloscope controls are disabled while in Video Picture mode.
The default Video Picture contrast and brightness settings correspond
to a black level of 7 IRE and a white level of 100 IRE.
TDS3SDI 601 Digital Video Technical Reference
Reference
The Video Picture mode draws a bright horizontal line on the picture.
This line-select cursor lets you visually select the Video Picture line
on which to trigger. Select Line in the Field/Line trigger side menu
and use the general purpose knob to move the line-select cursor to
set the video line.
The oscilloscope draws the picture using either even or odd fields of
data, based on the current field/line trigger setting when Video
Picture is turned on. Changes to the field/line trigger settings do not
change the video picture until the next time Video Picture is turned
on. The following table lists which fields are used to draw the picture
for each field/line trigger setting.
Fields used to draw
Field/Line setting
the video picture
Even, Even-numbered line Even
Odd, All Fields, All Lines,
Odd-numbered line
Odd
Changes to the Acquire Menu
The 601 Digital Video application module adds the following side
menu item to the Acquire Autoset menu.
Side menu Description
Video Autoset Executes the video autoset function to automatically display a
mV video graticule with video waveforms triggered on all lines.
TDS3SDI 601 Digital Video Technical Reference
31
Reference
Application Examples
The following are some examples of how to use the 601 video
module to acquire and display various video signals. All these
examples assume that you have connected the 601 Digital Video
module cables to the correct input channels.
Example 1: Video Picture
In this example, you want to quickly identify an ITU-R 601 video
signal. To do this you need to display a picture of the signal. Do
these steps:
1. Connect the 601 video signal to the input of the module.
2. Push the QuickMenu button.
3. Push the MENU bottom button to select Video.
4. Push the SUBMENU bottom button to select ITU-R 601.
5. Push the INPUT side button to select Auto Detect.
6. Push the AUTOSET Lines/Fields bottom button to trigger on
and display a video signal.
7. Push the Picture bottom button to turn Video Picture mode On.
The picture displays in the center of the graticule area.
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TDS3SDI 601 Digital Video Technical Reference
Reference
TDS3SDI 601 Digital Video Technical Reference
33
Reference
Example 2: Viewing 601 Component Signals
Continuing from example 1, you want to set the oscilloscope to
trigger on a particular line that is in an area of interest on the Video
Picture. Do these steps while in Video Picture mode:
1. Push the Field/Line side menu button to select Line.
2. Use the general purpose knob to position the horizontal line into
the area of interest. This sets the oscilloscope Field/Line trigger
value to the field and line at the position of the picture line.
34
3. Push the Picture button to turn Video Picture mode Off.
TDS3SDI 601 Digital Video Technical Reference
Reference
4. Push the AUTOSET bottom menu button to select the compo-
nent format (YPbPr, RGB, or YC). The oscilloscope displays the
component signals.
TDS3SDI 601 Digital Video Technical Reference
35
Reference
Example 3: Vectorscope
Continuing from example 2, you now need a vectorscope display to
quickly verify the color relationship for a 75% color bar signal. Do
these steps:
1. Push the DISPLAY Vectorscope button to enable the Vector-
scope. The oscilloscope displays the vectorscope screen.
2. If necessary, push the DISPLAY Vectorscope button again to
select 75%.
36
3. To return to the component signal or picture mode, push the
corresponding AUTOSET or DISPLAY bottom button.
TDS3SDI 601 Digital Video Technical Reference
Reference
Example 4: Video Autoset
In this example, you are trying to troubleshoot where a composite
broadcast video signal is getting lost in the master control feed. You
need to quickly acquire a waveform at different test points. Do these
steps:
1. Connect the composite video signal to oscilloscope channel 1
using proper adapters and a 75 ohm terminator .
2. Push the Acquire MENU button.
3. Push the Autoset bottom button.
4. Push the Video Autoset side button. If a broadcast-standard video
waveform is present, the oscilloscope displays a stable video
waveform that is triggered on all lines.
5. Connect the oscilloscope to the other test points until you locate
where the signal is lost. You do not need to change any
oscilloscope settings.
TDS3SDI 601 Digital Video Technical Reference
37
Reference
Example 5: Trigger On Line
In this example, you suspect that one or more pixels are defective in
a Charge-Coupled Device (CCD) video camera. You need to
determine which line in which fields contain the defective pixel(s).
Do these steps:
1. Connect the video camera output signal to oscilloscope channel 1
using proper adapters and a 75 ohm terminator .
2. Cover the camera lens with a lens cover so that no light enters the
lens.
3. Push the QUICKMENU button to display the QuickMenu.
4. If the video QuickMenu is not displayed, push the MENU bottom
button to display the video QuickMenu.
5. Push the SUBMENU bottom button to select SDTV/HDTV.
6. Push the Format side button to select SDTV.
7. Push the AUTOSET bottom button to select Lines.
8. Push the ACQUIRE bottom button to select Normal; this
increases the waveform resolution.
9. Push the Field/Line side button to select O Line n (odd) or E
Line n (even) for 525/NTSC signals, or Line n for 625/PAL and
SECAM signals. Use the general purpose knob to select the video
signal line on which to trigger.
10.Rotate the general purpose knob to examine each video line.
Write down the line number (and field if applicable) of any
waveforms with pixels that exceed error specifications. You can
also use the Zoom function to magnify the line display and
determine the number of defective pixels in a line.
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TDS3SDI 601 Digital Video Technical Reference
Reference
Example 6: Custom Video
In this example, you need to display a composite video waveform
from a medical instrument display driver that uses a non-broadcast
scan rate of 50 kHz. Do these steps to display the waveform:
1. Connect the composite video signal to oscilloscope channel 1
using proper adapters and a 75 ohm terminator .
2. Push the Trigger MENU front panel button.
3. Push the TYPE bottom button to select Video.
4. Push the Standard bottom button to select Custom.
5. Push the Source bottom button to display the A Trigger Source
side menu.
6. Push the CH 1 side button.
7. Push the Trigger On bottom button and side menu to set the
video trigger condition.
8. Push the Scan Rate bottom button to display the scan rate side
menu.
9. Push the Rate 4 side button to select a 35-50 kHz horizontal scan
rate. The oscilloscope displays the video waveform.
NOTE. The oscilloscope will display video waveforms for signals with
scan rates greater than 65 kHz. However, the waveform data (such as
line count) may not be accurate because the oscilloscope is
triggering on the next-detected sync pulse. The oscilloscope may miss
some sync pulses when scan rates are greater than 65 kHz.
TDS3SDI 601 Digital Video Technical Reference
39
Reference
Example 7: Holdoff Fields
In this example, you are examining a 525/NTSC composite video
waveform from a 601 digital video signal. You need to examine the
colorburst signal of field 1 without mixing it with the out-of-phase
colorburst signal of field 3. Do these steps:
1. Push the QUICKMENU button to display the QuickMenu.
2. If the video QuickMenu is not displayed, push the MENU bottom
button to select Video.
3. Push the SUBMENU bottom button to select ITU-R 601.
4. Push the INPUT side button to select 525.
5. Push the AUTOSET Video bottom button to select Lines.
6. Set the horizontal scale to 1.00 µs.
7. Use the HORIZONTAL POSITION knob to position the
colorburst signal toward the center of the screen.
8. Push the Field/Line side button to select O Line n, where n
represents the current value of the line argument.
9. Rotate the general purpose knob to set the line number to the first
colorburst line, which for NTSC signals is line ten.
10.Push the Holdoff side button to select Fields. This menu lets you
specify the number of video fields to skip before re-arming the
video trigger .
11. Rotate the general purpose knob to set the number of holdoff
fields to 2.5.
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TDS3SDI 601 Digital Video Technical Reference
Reference
12.Determine which field you are triggering on. If necessary, use the
Zoom button to magnify the colorburst signal.
Field 1 or 4
Sync
Field 2 or 3
13.If the oscilloscope is triggering on field 2, repeatedly push the
SINGLE SEQ button until the colorburst waveform changes to
the correct phase for field 1, and then push the RUN/STOP
button to resume triggering the oscilloscope.
TDS3SDI 601 Digital Video Technical Reference
41
Reference
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TDS3SDI 601 Digital Video Technical Reference
Appendix A: Specifications
This section describes the TDS3SDI 601 Digital Video application
module specifications. All specifications are guaranteed unless
labeled ‘typical.’ Typical specifications are provided for your
convenience but are not guaranteed.
Table 1: Specifications
Characteristic Description
Input signal 270 Mb/s; complies with ITU–R BT.601–5 and
SMPTE 259M.
Input impedance 75 Ohms ±3% DC, single-ended terminated.
Output impedance 75 Ohms, nominal (output levels set for double
termination).
Return loss Minimum 15 dB measured at 135 MHz.
Signal accuracy,
typical (signals to
oscilloscope input
channels)
Ch 1: Composite ±6%
Ch 2: Pb (Blue)
Ch 3: Pr (Red or Chrominance)
Ch 4: Y (Green) ±6%
Sync on R, G & B
±3%
±3%
TDS3SDI 601 Digital Video Technical Reference
43
Appendix A: Specifications
T able 1: Specifications (cont.)
Characteristic Description
Vectorscope Description Accuracy
Accuracy, typical 525 (NTSC) and 625 (PAL) signals ±3%
Target box size 3% from center to any edge.
Cable equalization
range, typical
Picture mode Monochrome, compressed video image in 4:3 format.
Video error
detection
Environmental,
Mechanical and
EMI
Up to 250 meters of Belden 8281 cable or equivalent.
EDH (Error Detection and Handling) per SMPTE RP165.
Refer to the TDS3000 Series instrument specifications for
environmental, mechanical, and EMI specifications.
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TDS3SDI 601 Digital Video Technical Reference
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