Tektronix SDA601 User Manual

User Manual

SDA601 Serial Digital Analyzer
070-8913-03
Copyright E Tektronix, Inc., 1994. All rights reserved. Printed in U.S.A. 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. The following are registered trademarks: TEKTRONIX and TEK.
For product related information, phone: 800-TEKWIDE (800-835-9433), extension TV.
For further information, contact: Tektronix, Inc., Corporate Offices, P.O. Box 1000, Wilsonville, OR 97070–1000, U.S.A. Phone: (503) 627–7111; TLX: 192825; TWX: (910) 467–8708; Cable: TEKWSGT.

Warranty

Tektronix warrants that the SDA 601 Serial Digital Analyzer 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.
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 this product in lieu of any other warranties, expressed or implied. Tektronix and its vendors disclaim any implied warranties of merchantabil­ity or fitness for a particular purpose. Tektronix’ responsibility to repair or replace defective pr oducts 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.
EC Declaration of Conformity
We
Tektronix Holland N.V. Marktweg 73A 8444 AB Heerenveen The Netherlands
declare under sole responsibility that the
SDA 601 Handheld Serial Digital Analyzer
meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities:
EN 55011 Class A Radiated and Conducted Emissions EN 50081-1 Emissions:
EN 60555-2 AC Power Line Harmonic Emissions
EN 50082-1 Immunity:
IEC 801-2 Electrostatic Discharge Immunity IEC 801-3 RF Electromagnetic Field Immunity IEC 801-4 Electrical Fast Transient/Burst Immunity
High-quality shielded cables must be used to ensure compliance to the above listed standards.

Table of Contents

Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplying Power 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the SDA 601 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERIAL INPUT 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUX Output 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232 Interface 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keypad and Display Conventions 7. . . . . . . . . . . . . . . . . . . . . . .
The On-screen Display (OSD) 8. . . . . . . . . . . . . . . . . . . . . . . . . .
Preliminary Settings 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set the Date and Time 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set the Battery Type 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable (Disable) Auto Power Off 10. . . . . . . . . . . . . . . . . . . .
Disable (Enable) Timed LCD Backlight Turn Off 11. . . . . . .
Performance Verification 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using Your SDA 601 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analyzing a Signal 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Watching a Signal 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alarms 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying the Signal Level 21. . . . . . . . . . . . . . . . . . . . . . . . .
Cursor 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Highlighting 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulse Cross 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Presets 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Software Reset 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents
Reference 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SDA 601 Menus 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menu Conventions 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Watch Menu (groups enabled) 29. . . . . . . . . . . . . . . . . . . . . . .
Watch Menu (items enabled) 29. . . . . . . . . . . . . . . . . . . . . . . .
Alarm Menu 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Select Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Presets Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Utility Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The AUX Output 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232 Connector 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232/Printer Setups 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Watch Mode 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Format Error Checking 36. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the CRC Change Watch Group 38. . . . . . . . . . . . . . . . .
Appendix A: Characteristics 41. . . . . . . . . . . . . . . . . . . . . . . . .
Safety Standard Compliance 41. . . . . . . . . . . . . . . . . . . . . . . . . . .
Specification Tables 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Replaceable Parts 45. . . . . . . . . . . . . . . . . . . . . . .
Appendix C: User Service 47. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Hints 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The BATTERY LOW Message 47. . . . . . . . . . . . . . . . . . . . . .
Low-battery Shut Down 47. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Batteries or Battery Pack 48. . . . . . . . . . . . . . .
Replacing the Touch Memory/Timer Module 49. . . . . . . . . . . . . .
Preventive Maintenance 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cursor 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulse Cross 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O Menu 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SDA 601 Serial Digital Analyzer User Manual
List of Figures
Figure 1: Opening the Battery Compartment 2. . . . . . . . . . . .
Figure 2: Connecting the SDA601 4. . . . . . . . . . . . . . . . . . . . .
Figure 3: A Printed Analysis Report 6. . . . . . . . . . . . . . . . . . .
Figure 4: The Default Watching OSD 8. . . . . . . . . . . . . . . . . .
Figure 5: The Set Time display 9. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6: The Analyze OSD 15. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7: The SDA601 “Watching” Display 18. . . . . . . . . . . . .
Figure 8: Watch Errors Reported on the OSD 19. . . . . . . . . . .
Figure 9: The SDA601 Signal Level Display 21. . . . . . . . . . . .
Contents
Figure 10: The Cursor Data Display 22. . . . . . . . . . . . . . . . . . .
Figure 11: SDA 601 Menu Conventions 27. . . . . . . . . . . . . . . . .
Figure 12: The OSD Setups/Horizontal Position Item 28. . . . .
Figure 13: The SDA Number Keys 28. . . . . . . . . . . . . . . . . . . .
Figure 14: The Cursor Data Display 1. . . . . . . . . . . . . . . . . . .
List of Tables
Table 1: RS-232 Connector Pin Assignments 35. . . . . . . . . . .
Table 2: Serial Digital Video Input 42. . . . . . . . . . . . . . . . . . . . .
Table 3: AUX Output 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4: Signal Level Meter 43. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5: Physical Characteristics 43. . . . . . . . . . . . . . . . . . . . .
Table 6: Environmental Characteristics 43. . . . . . . . . . . . . . . .
SDA 601 Serial Digital Analyzer User Manual
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Contents
iv
SDA 601 Serial Digital Analyzer User Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or Personal Injury
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.
The common terminal is at ground potential. Do not connect the common terminal to elevated voltages.
Connect the ground lead of the probe to earth ground only.
Replace Batteries Properly. Replace batteries only with the proper type and rating specified.
Recharge Batteries Properly. Recharge batteries for the recom­mended charge cycle only.
Use Proper AC Adapter. Use only the AC adapter specified for this product.
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.
SDA 601 Serial Digital Analyzer User Manual
v
General Safety Summary
Safety Terms and Symbols
Terms in This Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property .
Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you
read the marking. WARNING indicates an injury hazard not immediately accessible as
you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product. These symbols may appear on the product:
CAUTION
Refer to Manual
Double
Insulated
Battery Recycling
This product contains a Nickel Cadmium (NiCd) battery, which must be recycled or disposed of properly. For the location of a local battery recycler in the U.S. or Canada, please contact:
RBRC (800) BATTERY Rechargeable Battery Recycling Corp. (800) 227-7379 P.O. Box 141870 www.rbrc.com Gainesville, Florida 32614
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SDA 601 Serial Digital Analyzer User Manual

Getting Started

Please read the following statements before using your new SDA 601 Serial Digital Analyzer . See the rest of this section for tips on supply­ing power, making preliminary settings, and connecting the instru­ment.
WARNING. Install or replace batteries only with the instrument switched OFF and the AC adapter disconnected. Electrical shock or equipment damage can result.
CAUTION. Do not attempt to operate the SDA 601 with an impr oper AC adapter. Damage to the instrument can result.
For best results, use the AC adapter supplied with the instrument. If the supplied adapter is incorrect for the local AC power supply, con­tact your nearest Tektronix representative.
The adapter voltage must be 9 to 15 VDC with an open-circuit voltage less than 18 VDC; the adapter connector must have the negative (–) polarity contact in the center .
NOTE. Internal batteries are recommended when using an external power adapter. A loose adapter connector can cause the loss of some user settings and unexpected results the next time the instrument is powered on.
The battery type, disposable or rechargeable, must be selected using through the Utility menu (see page 10). Failure to select the proper battery type can result in damage to the batteries and product.
Replace the batteries only with standard AA batteries (1.2–1.5 V, nominal), or the Tektronix rechargeable battery pack listed on page 45.
For more information, please contact your nearest Tektronix represen­tative or field office. In the United States and Canada, you can also call the Tektronix information number, 1-800-TEK-WIDE (1-800-835-9433), between 8:00 am and 5:00 pm Pacific time.
SDA 601 Serial Digital Analyzer User Manual
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Getting Started

Supplying Power

The SDA 601 is DC powered. You may power it with the standard AC adapter, the optional 9.6 V NiCad battery pack, eight standard AA batteries, or a “BP” type battery pack with the correct voltage and po­larity. The external DC power connector is on the left side of the instrument.
Figure 1: Opening the Battery Compartment
To install AA batteries or the battery pack, open the battery compart­ment of the SDA 601 by pressing down on the cover and sliding it in the direction of the inscribed arrow, as shown above. When the cover tabs line up with the slots in the case, lift the cover away from the instrument. Install batteries in alternating directions as indicated by the graphic molded into the “floor” of the battery compartment. If us­ing the optional battery pack, take the time to identify both contacts and install the pack properly.
When selecting a power source for your SDA 601, please remember: H Attempting to use an improper AC adapter can cause permanent
damage to the instrument. USE AN APPROPRIATE DC POWER
SOURCE ONLY: Voltage must be between 9 and 15 VDC; the
center contact of the connector must be NEGATIVE polarity; and
open-circuit voltage must not exceed 18 VDC. For best results, use
the adapter supplied with the instrument.
2
H There is no need to remove the optional NiCad battery pack for
recharging. The SDA 601 will “trickle charge” the battery pack
whenever the standard AC adapter is attached and the instrument
SDA 601 Serial Digital Analyzer User Manual
Getting Started
is switched off. It can take up to 16 hours to fully charge the bat­tery pack. Note that charging will occur only if the adapter sup-
plies at least 12V; make sure that the adapter you use is appropriate for the local AC supply.
H AA batteries are not included with the instrument; buy them local-
ly. Rechargeable AA batteries may be used, but they are NOT re­charged automatically. To recharge AA batteries, remove them from the instrument and use an appropriate charger. For safety, read and follow the battery charger instructions. Do NOT attempt to recharge standard alkaline batteries.
H After three minutes with no key press, the LCD back light will be
dimmed to save battery charge. (This may be disabled through the Utility/Diagnostics/Power Manage menu; see page 33.)
H To guard against battery discharge if you forget to turn the
SDA 601 off, enable Auto Power Off through the Utility/Diagnos­tics/Power Manage menu (see page 10).
H The SDA 601 can sense low battery voltage. It will warn you when
the charge is sufficient for approximately ten more minutes of op­eration. The instrument will shut itself down when the battery volt­age becomes too low for reliable operation. See the Battery hints in Appendix C, beginning on page 47.
The ON key toggles instrument power On and Off.
NOTE. If the instrument is operating with low batteries, it may turn itself off and on. The batteries should be replaced or recharged depending on battery types.
SDA 601 Serial Digital Analyzer User Manual
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Getting Started

Connecting the SDA601

Figure 2: Connecting the SDA601
Connect the instrument as shown in Figure 2. The OPTION connector is reserved for later versions of the instrument. Note that the SDA 601 has many capabilities and features, and you may wish to gain familiar­ity with it by first connecting it directly to a serial digital, component video signal generator such as the Tektronix TSG 601, an analog video monitor, and—if convenient—a compact printer, such as the SeikoD­PU 411 printer (Tektronix part number 119-4594-00), available from Tektronix distributors and through TekDirect.
SERIAL INPUT
Connect the instrument to your system through the SERIAL INPUT with 75W coaxial cable. Note that the SDA 601 has internal, active termination. The signal path that ends with the SDA will be properly terminated only when the instrument is switched on.
AUX Output
4
H Lets you view the picture for convenient source identification. H Can contain the On-screen Display (OSD; see page 8), which
shows the most recent Watch or Analyze results one page at a
time—instead of one item at a time as on the SDA 601 display.
SDA 601 Serial Digital Analyzer User Manual
Getting Started
H With Pulse Cross enabled (see page 24), lets you “see” the con-
tents of the vertical and horizontal interval portions of the serial video signal.
H Can include Cursor cross hairs for convenient positioning of the
Cursors (see page 22).
H When Highlighting (see page 23) is turned on, can help you locate
and identify errors in the picture, or the digital encoding of the signal.
The AUX output signal may be thought of as “pseudo video.” It derived from the serial input signal, converted to analog by an unfil­tered 5-bit DAC. The signal can be the Y, R–Y, or B–Y component. Please see page 35 for more information about the AUX output.
is
RS-232 Interface
Connect an ASCII, serial printer to the RS-232 connector to create “hard copy” analysis reports, or to log errors detected during a Watch session. See page 35 for the connector pinouts, and other necessary communications settings. With a printer connected, you can choose—through the Alarm menu—to have the SDA 601 log every error as it occurs, or to print a Watch report every ten seconds. This will permit unattended monitoring of your system. See page 20 for more information.
To test your printer connection and settings, perform a signal analysis by pressing spond by printing an analysis report that resembles the one shown in Figure 3.
Analyze. Then, press Shift-Analyze. The printer should re-
SDA 601 Serial Digital Analyzer User Manual
5
Getting Started
Figure 3: A Printed Analysis Report
The RS-232 interface is also designed to support in-field upgrade of the operating software. Information regarding any such upgrades will be available from your Tektronix representative or field office.
6
SDA 601 Serial Digital Analyzer User Manual

Keypad and Display Conventions

Please see the Instruction card (p/n 070-8912-00) supplied with your SDA 601 for a “tour” of the keypad and an explanation of the display symbols. For your convenience, the following panels are taken from the card.
Getting Started
SDA 601 Serial Digital Analyzer User Manual
7
Getting Started

The On-screen Display (OSD)

The OSD is a 12 line, 24 column display containing results from an SDA 601 Analyze or Watch session. It can be superimposed on the AUX output and viewed on an attached video monitor . Toggle the OSD On/Off with the Figure 4 when the instrument is in Watch mode. You can control sev­eral OSD characteristics (size, color, screen position) through the Util­ity/OSD Setups submenu; see page 32.
Insert On/Off key . The default OSD will resemble
8
Figure 4: The Default Watching OSD
The symbols on the bottom line of the OSD have the following mean­ings:
H The rotating line in the lower left indicates that Auto Power Off is
enabled. H The musical note symbol indicates that Alarms are toggled On
with the
appear even when the beeper and print errors items in the Alarm
menu are set to Off.
H The “W” appears when the instrument is in Watch mode. H The reversed “E” means that an error is detected.
Alarm key or through the Alarm menu. This symbol can
SDA 601 Serial Digital Analyzer User Manual
Getting Started
H Similar reversed “S” and “SL” icons (not shown) will appear when
SDA 601 keypad is shifted and shift locked.
H The down arrow in the lower right indicates that the
used to reveal another page. An up arrow will appear if the may be used.
The Analyze OSD is similar; see Figure 6, on page 15.

Preliminary Settings

Once the SDA 601 is up and running, you should choose some settings depending on how you’ll be using the instrument. These settings are made through the Utility menu. Invoke the Utility menu by holding
Lock Out down while pressing the ON key (when the LCD says “Watch-
ing” or “Idle”). Then follow these directions to set the Battery Type and enable Auto Power Down (if desired).
Set the Date and Time
1. Once in the Utility menu, use the Y and B keys to scroll to the Set Time item, and press resemble Figure 5.
B key may be
Y key
Enter. The instrument display will change to
Figure 5: The Set Time display
2. The underline cursor indicates the active character position. Move the cursor with the
A and " keys. Enter the appropriate character
from the SDA 601 keypad. When the cursor is in positions that require numeric entry, the keys will be automatically shifted. When you enter an appropriate character for the field, the cursor will move one position to the right. The acceptable month abbrevi­ations are the first three characters of the English name: JAN; FEB; MAR; APR; MAY ; JUN; JUL; AUG; SEP; OCT; NOV; DEC.
SDA 601 Serial Digital Analyzer User Manual
9
Getting Started
Enter the time in 24 hour format; that is, if the present time is 4:15 pm, enter 16:15.
3. When the correct date and time is shown on the display, press . If all values are valid, the instrument will respond with the
ter
En-
message “Time Accepted.” If you have made an error and entered an invalid date or time, the instrument will respond with an ap­propriate error message. If that happens, correct the error and press enter.
4. Press any rectangular key to exit the Utility menu, or proceed to
other preliminary settings, as appropriate.
Set the Battery Type
1. After setting the clock, press the B key once to scroll to the Diag-
nostics submenu item, and press
2. In the Diagnostics submenu, scroll down to the Power Manage
item with the
B key. Again, press Enter.
3. The top item in the Power Manage submenu is Battery Type.
Toggle to the selection that matches the type of battery you have installed in your SDA 601 by pressing either are “rechargeable” and “disposable.” Select rechargeable when using NiCad AA cells or the optional battery pack; choose dispos­able when you are using common Alkaline AA batteries, which cannot be recharged. Press
Enter.
A or ". The choices
Enter to confirm the choice.
10
4. When the correct battery type is indicated by an asterisk (*) on the
lower right of the LCD, continue to Auto Power Off, or press any rectangular key to exit the Utility/Diagnostics/Power Manage sub­menu and return to normal operation.
Enable (Disable) Auto Power Off
“Auto Power Off” will switch the instrument off when ten minutes have passed without a key press. Enable this feature when you are using battery power and operating in an environment in which un­planned shutdown of the SDA 601 is permissible.
1. While still in the Utility/Diagnostics/Power Manage submenu,
press the
B key twice to scroll to the Auto Power Off item.
SDA 601 Serial Digital Analyzer User Manual
Getting Started
2. Disable/enable Auto Power Off by pressing either
Enter to confirm the choice. Enabled Auto Power Down is indi-
A or ". Press
cated by a “rotating line” symbol on the second line of the instru­ment display, and in the lower-left corner of the OSD.
3. Use the
Y and B keys to scroll to other “power manage” items, or
press any rectangular key to exit the menu and resume normal op­eration.
Disable (Enable) Timed LCD Backlight Turn Off
Another power saving feature of the SDA 601 is timed turn-off of the LCD backlight. It is enabled by default in a new or reset instrument. If you will always operate with the AC adapter, you may wish to disable the feature. To toggle backlight turn-off:
1. In the Utility/Diagnostics/Power Manage submenu, use the
B keys to scroll to the LCD Backlight item.
2. Choose between “Timed Turn Off” and “On all the time” with ei-
A or ", then press Enter to confirm the choice.
ther
Y and
3. As before, use the items, or press any rectangular key to exit the menu and resume normal operation.

Performance Verification

A performance verification procedure, which some users may require for acceptance testing, is included in the optional SDA 601 service manual (Tek p/n 070-8914-0x). To order a service manual, please con­tact your nearest Tektronix representative or field office.
Y and B keys to scroll to other “power manage”
SDA 601 Serial Digital Analyzer User Manual
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Getting Started
12
SDA 601 Serial Digital Analyzer User Manual

Operating Basics

NOTE. For more information on Serial Digital Video Systems request Tektronix publication 25W-7203-1 “A Guide to Digital Television System and Measurements” from your nearest T ektronix representa­tiveor field office.
To begin using the instrument as quickly as possible, see “Using Your SDA 601,” below. For additional information on selected top­ics, turn to the Reference section of this manual, beginning on page
27.

Using Your SDA601

Here’s what you can do with your SDA 601. Instructions for each function begin on the indicated page.
SDA 601 Serial Digital Analyzer User Manual
13
Operating Basics
H Analyze one second of the incoming signal and read the results
on the instrument display or an attached video monitor (page 14). You may also print the results on an attached ASCII, serial printer (page 15).
H Watch the input signal, paying attention to selected signal char-
acteristics, or groups of characteristics (page 16). Errors are re­ported to the instrument display panel and an attached video monitor. You may also log errors to an attached printer (page
20).
H Set audible alarms to warn you of any errors encountered while
the instrument is “watching” the input signal (page 19).
H View decoded video on an attached monitor (attached to the
AUX output, see page 4)
H Highlighting (page 23) H Signal Level Meter (page 21) H Cursors (page 22) H Pulse Cross (page 24)
Analyzing a Signal
Analyze Mode may be selected with the Analyze key at any time. In this mode, the instrument attempts to lock onto the digital video sig­nal and, if successful, analyzes the status of the various signal char­acteristics at one instant in time and reports the status to the Review List. The Review List may be viewed on the OSD (on an attached video monitor) as well as on the SDA 601 LCD when no menu is active. The up and down arrow keys scroll through the list of de­tected “conditions.”
The conditions detected and reported in an SDA 601 analysis are:
Video format TRS (OK/incorrect) Line standard (625 or 525) ANC Format (OK/incorrect) Video present or missing Zero length ANC (yes/no) Video resolution (8 or 10 bits) APCRC changes (yes/no) EDH packet found/missing FFCRC changes (yes/no) Audio status (16 channels) APCRC errors (yes/no) Stuck bits (if any) FFCRC errors (yes/no) Illegal (digital word) values ØAPCRC (yes/no)
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SDA 601 Serial Digital Analyzer User Manual
Operating Basics
Video In/Out of range EDH flag set/not set Line/field length (OK/incorrect)
Performing an Analysis — To analyze a signal, simply press
. The SDA 601 will observe the incoming signal for one second,
lyze
Ana-
analyze the data, and write the results to a “condition review list” and the OSD.
Reviewing the results on the OSD — There are three pages of re­sults; use the
B and Y keys, as indicated by the arrow icons on the
lower right of the OSD, to see all three pages.
Figure 6: The Analyze OSD
Reviewing the results on the LCD — Use the scroll through the condition list on the instrument LCD. The display will “time out” after three seconds of no key press and return to its pre-analysis state—Idle, or the data enabled through the Display Se­lect menu. Press
Enter to return to the last condition; press B or Y to
scroll down or up the list. Printing an Analysis report — With a printer connected to the
RS-232 port and properly configured (see pages 35 and 36), press
Shift, then Analyze. A report, resembling the printout shown in Figure
3 (page 6), will be printed.
SDA 601 Serial Digital Analyzer User Manual
B and Y keys to
15
Operating Basics
Audio and Stuck Bits explained — Audio content and stuck bits are reported on the LCD and Printer output in the same format as in the OSD, shown in Figure 6:
The “Audio:” result line has room to display the status of all 16 audio channels that can be embedded in digital video. The status of channels (#1 through #16, from left to right) are reported as “–” for no audio detected, “A” for active audio, and “M” for mute (present, but silent).
The “Stuck Bits:” line shows the status of the 10 possible video word bits, MSB to LSB left to right. If the signal contains any stuck bits, they are indicated by an H (stuck high) or L (stuck low) in the appropriate position. The two LSBs will be reported as L when an 8-bit video signal is received. Other stuck bits sug­gest either an incorrect signal or faulty equipment.
Zero-length ANC — is reported by the SDA601 when an ancillary data “Data Count word” with value Ø is detected. Analyze mode detects the presence of zero-length ANC because it can be inserted in the serial digital video data stream by some equipment, yet it can cause difficulty in many systems.
Watching a Signal
While Analyze takes a one-second “snapshot” of the input signal and reports the status of a predefined list of characteristics, Watch mode permits continuous observation of the characteristics—or “condi­tions”—of your choice. Besides reporting errors to the instrument display and the OSD, Watch mode can also sound an audible (“beep” or “tick”) alarm to alert you of any error, and log errors to a printer for later review.
The steps to monitoring a signal with the SDA 601 are:
1. Select the conditions to be watched. This is done through the Watch menu, which can be set for “Group” or “Item” selection of conditions. Group selection may be more convenient, but not as flexible as Item selection.
In all, there are 20 Watch conditions. Eight conditions are always watched and reported when “Watch Menu Type” is set—through the Utility menu—to “Groups”:
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SDA 601 Serial Digital Analyzer User Manual
Operating Basics
Video format EDH packet found/missing Line standard (625 or 525) Audio present/missing Video present or missing Stuck bits (if any) Bits in active picture (8 or 10) Other ANC (if any)
The twelve remaining conditions are organized into the four Watch groups:
Data Value Group: CRC Change Group:
Illegal (word) values APCRC changes (yes/no) Video In/Out of range FFCRC changes (yes/no) Format Group: APCRC is/not Ø Line/field length (OK/incorrect) EDH Group: ANC Format (OK/incorrect) AP EDH errors (yes/no) TRS (OK/incorrect) FF EDH errors (yes/no) Zero length ANC (yes/no) EDH flag set/not set
When only the Data Value group is set to “Watch,” the SDA 601 will actually observe the status of ten conditions—the eight de­fault conditions plus Illegal Values and Video In/Out of Range. If all four groups are selected, all 20 conditions are monitored.
Group selection can be inconvenient, however, when you are only interested in one condition in the group. An example might be when observing a changing test signal that is being generated with ØAPCRC. In this case, FFCRC changes are not an error, but non-zero APCRC is, and Watching the CRC Change Group can result in inappropriate alarms.
The remedy, then, is to use the Utility menu and set Watch Menu Type to Item Select. When this is done, the only always-watched condition is Video Format (270 Mb Component, for example). All other items are selected individually. See the Watch menu listings on pages 29 through 30.
2. Set the appropriate alarms; see page 19.
3. Once all conditions have been selected and alarms configured, begin the Watch session by pressing
Watch. If none of the display
options (Signal Level, Cursor Data, or Current Time) have been turned on through the Display Select menu, the display will re­semble Figure 7. The “W” icon will appear whenever the instru­ment is in Watch mode; the “A” icon will be displayed when alarms have been toggled On with the
Alarm On/Off key (whether
SDA 601 Serial Digital Analyzer User Manual
17
Operating Basics
or not alarms are enabled through the Alarm menu); and the “E” icon will appear when an error is detected.
Figure 7: The SDA601 “Watching” Display
4. Review the condition list on the SDA601 LCD by pressing the key until you reach the END OF LIST message. Use Y to scroll back up the list as desired. The Watch review list will “time out” if more than 3.5 seconds pass without a key press. Press return to the last-displayed item; press display the previous item; press
B to display the next item
Y to move up the list and
Enter to
“down” the list.
5. If you have a video monitor connected to the AUX output, you may review the condition list on the OSD. Toggle the OSD On with the the
Insert On/Off key , then page the OSD up and down with
Y / B keys.
Restarting a W atch session — Pressing Watch during a Watch ses- sion will restart the Watch mode, resetting the elapsed time counter and the printer page count to zero.
Stopping a Watch session — The current Watch session will end when you press
Analyze or enter the Watch menu. After the analysis,
or on leaving the Watch menu, you may begin a new Watch session by pressing
Watch.
B
18
Pausing a W atch session — A Watch session is temporarily sus­pended when you invoke any other SDA 601 menu (besides the Watch menu). Data collection continues, but OSD and printer up­dates are suspended. When you exit the menu by pressing a rectan­gular key, the OSD will update to include all events during the time spent in the menu.
SDA 601 Serial Digital Analyzer User Manual
Figure 8: Watch Errors Reported on the OSD
Operating Basics
Interpreting error reports — The SDA 601 reports errors in many Watch conditions to the review list on an “error second” basis, as shown in Figure 8. In this illustration, the FFCRC and the APCRC changed at least once, giving one error second approximately 25 se­conds after the Watch session began. In addition, APCRC was NOT zero at least once in over 254 seconds (254 is the highest count pos­sible), and the last error was detected in the last reported second, 7:12 into the Watch session.
A similar format is used on the SDA 601 liquid crystal display.
Alarms
Alarms are enabled through the Alarm menu. When enabled, an alarm is generated when one or more signal conditions or errors are detected by the SDA 601 in Watch mode. The SDA 601 has two alarm modes.
H A “beeper” (audible) alarm that may be configured in one of
three ways: h Long Beep — Several seconds long, produced each time an
alarm condition is detected. In the case of frequently-recur­ring errors, the beep will repeat continuously, if necessary;
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Operating Basics
h Short Beep — One second duration; otherwise similar to the
h Beep “Tick” — A very short beep, almost a tick; useful when
H A Printer Port alarm, output on the RS-232 port. There are two
ways to use the printer during watch sessions: h Log each error — or as many as the printer buffer allows.
however, there may be fewer than one alarm per error condi­tion.
Long Beep.
there are many alarm conditions, when they occur in “bursts,” or for audible feedback when performing equipment adjust­ments for proper operation.
Intended for extended monitoring of the signal when few, if any errors are expected. You can leave the SDA 601 (powered by the AC adapter) and a printer unattended to log and help diagnose intermittent problems. This is the same as the audi­ble alarm in that, once configured, it can be controlled with the
Alarm On/Off key.
h Print an error report every ten seconds — Strictly speaking,
this option is not an alarm because when it is selected, the instrument will print a report every ten seconds of the Watch session whether an err or has been detected or not, and re- gardless of the Alarm On/Off state (set with the key or through the menu). The print line will contain at least the time and video format; only errors that occurred in the pre­ceding ten-second interval will be printed.
Select alarm conditions or errors through the Watch menu (see “Watch Mode,” above). Conditions that will always trigger an alarm if detected by the SDA 601 in Watch mode are:
No PLL Lock V ideo Missing “Other” ANC Data Illegal Value Video Ovr Range Line/Field Len EAV/SAV/TRS Error ANC Format Error Zero Length ANC AP CRC change
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SDA 601 Serial Digital Analyzer User Manual
Operating Basics
FF CRC change AP EDH error FF EDH error Flag Set
Conditions that will trigger an alarm only if they are configured to do so through the Item Watch menu are:
Line Std Detect (if “Alarm if 525” or “Alarm if 625” is selected) AP Bits (8/10) (if “Alrm if 8 bits” or “Alrm if 10 bits” is se­lected) EDH packet miss (if “Alarm if Miss” is selected) AP CRC Not Ø (if “Alarm Not Ø” is selected)
Configure the beeper and printer alarms through the Alarm Menu (see page 30). As you might expect:
1. Enter the Alarm menu (press
2. Scroll to the desired menu item with the
3. Select the option with the
4. Confirm the option choice by pressing
Shift, then Alarm On/Off).
B / Y keys.
A / " keys.
Enter.
5. Exit the Alarm menu by pressing any rectangular key. Toggle the alarms On/Off with the
Alarm On/Off key.
Displaying the Signal Level
The relative level of the serial digital input signal is displayed by default on every new (or reset) SDA 601. This display can be helpful in identifying points in your system where the signal may be margin­al because of long cable runs or faulty equipment.
Figure 9: The SDA601 Signal Level Display
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21
Operating Basics
The signal level display may be toggled On/Off through the
key/menu (see page 31).
Select
Display
Cursor
The SDA 601 “cursor” may be used to pinpoint a single word in the digital video frame and discover the actual value of the selected word and the three that follow. The location of the cursor may also be shown with “cross hairs” on a video monitor connected to the AUX output.
The cursor is positioned (and a word is selected) with the arrow keys.
Figure 10: The Cursor Data Display
The address/coordinates of the word, and its actual hexadecimal val­ue, may be viewed on the SDA 601 display, as shown in Figure 10. Toggle display of the Cursor Data on the instrument LCD through
Display Select key and menu (see page 31).
the The first line of the cursor data display contains the hexadecimal
values of the selected word and the three that follow it. Values typi­cal for the SAV timing and reference signal are shown in Figure 10. The video “type” of the selected word is indicated by the sample ID:
B = C
color difference
B
Y = Cosited luminance R = C
color difference
R
y (lowercase) = Isolated luminance
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SDA 601 Serial Digital Analyzer User Manual
Operating Basics
The second line contains the address or coordinates of the selected word. In the example, the selected word is number 1712 of line 4 in field 1.
The cursor movement icon is present on the second line when you can use the arrow keys to position the cursor . Use the
B (Cursor) key
to toggle the arrow keys between cursor movement and their alter­nate display scrolling function. Normal cursor movement is one line for each press of the
" key. Pressing Shift twice (to invoke shift lock) will increase hori-
Y or B key, and one word per press of the A or
zontal movement to 20 words per key press, and vertical movement to 10 lines per key press. Press Shift again to return to “fine” cursor control.
Toggle display of the Cursor cross hairs in the AUX output through the I/O menu (see page 31).
Highlighting
Highlighting is a feature of the AUX video output in which the SDA 601 “flashes” pixels that correspond to certain Watch condi­tions. With highlighting, you can visually monitor the occurrence, placement, and prevalence of these signal conditions in the context of the video signal.
The following Watch conditions or errors can be highlighted on an attached video monitor:
h ANC packet format error (e.g., checksum or parity errors) h Zero-length ANC packets h Other ANC data (data that is neither audio nor EDH format) h Incorrect Line/field length h Incorrect TRS/EAV/SAV format h Illegal data values h Out of range video levels
To use Highlighting:
1. Configure the SDA601 to monitor one or more of the above items; see “Watching a Signal” beginning on page 16.
2. Enter the I/O menu (press
Shift, then Insert On/Off).
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23
Operating Basics
3. The first I/O menu item is Highlighting. Use the select “Display,” then press
4. While still in the I/O menu, press the
Enter to confirm the choice.
B key once to scroll down
A or " key to
to the “Dim Video” item.
5. Toggle Dim Video to On with a horizontal arrow key, then press
Enter to confirm the choice. Dim V ideo reduces the video signal
by 50%, ensuring good contrast between the video signal and highlighted pixels.
6. Exit the I/O menu by pressing any rectangular key.
7. If necessary, start or restart the Watch session by pressing
Watch.
8. The default OSD will obscure any highlighting in the portion of the picture that it occupies. Therefore, if the OSD is on, toggle it off with the
Insert On/Off key .
A convenient way to see the effects of Highlighting is to set either the Data Value Group or the Video Over Range item to Watch, then input a Pluge signal. The “sub-black” portion of active video will be highlighted.
Note that the ANC highlight conditions occur in the horizontal or vertical interval. Use Pulse Cross to “see” those conditions.
Pulse Cross
Pulse Cross is an SDA 601 AUX output mode that allows the user to “see” the horizontal and/or vertical intervals, which are normally blanked in serial video monitors. The original four-word timing ref­erence signals (TRS, which contain EAV and SAV) are replaced with legal video samples, and analog H and V sync information is inserted in the original active picture region. To invoke pulse cross:
1. Enter the I/O menu (press
2. Press the
B key repeatedly to scroll down to the Pulse Cross
menu item.
3. With the
A / " keys, scroll to the desired pulse cross option. The
options are: Normal — the default
HCross — reveals the “horizontal interval” region of the signal VCross — reveals the “vertical interval” region of the signal Both — combines HCross and VCross
Shift, then Insert On/Off).
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SDA 601 Serial Digital Analyzer User Manual
Operating Basics
4. Press
Enter to select the new option.
5. Press any rectangular key to exit the I/O menu.
Presets
The configuration of the SDA 601 at any given time may be saved as a Preset for later recall. Three different configurations can be saved. Using presets, you can easily change between completely different combinations of (for instance) Watch conditions, alarm settings, LCD display options, and AUX output options. To save a Preset:
1. Enter the Presets menu (press
2. Press
B once to reach the Save Preset item.
3. Choose a preset storage location (1, 2, or 3) with the Remember that previous contents of the storage location will be overwritten in the next step.
4. Press
Enter to save the current settings in the indicated location.
“Working... Done” will appear on the LCD during the save pro­cess.
Shift, then Display Select).
A / " keys.
5. Press any rectangular key to exit the Presets menu.
To recall a previously saved Preset:
1. Enter the Presets menu.
2. Choose the Preset (1, 2, or 3) with the
3. Press
Enter to recall the saved configuration. “Working... Done”
A / " keys.
will appear on the LCD. Some settings (I/O and Display settings, for example) will change instantly; Watch and Alarm settings will be restored in the next Watch session.
4. Press any rectangular key to exit the Presets menu.
NOTE. Recalling a preset will turn Watch mode off.
Software Reset
To reset the instrument NVRAM and restore the SDA 601 to “facto­ry” default settings, select the Factory Reset item in the Utility/Diag­nostics/NVRAM/TIC Dgs submenu. See page 34.
NOTE. All user settings and presets will be lost.
SDA 601 Serial Digital Analyzer User Manual
25
26
SDA 601 Serial Digital Analyzer User Manual

Reference

SDA601 Menus

The instrument menus are explained here, and listed on the following pages.
Watch Menu (groups enabled) 29. . . . . . . . . . . . . . . . . . . .
Watch Menu (items enabled) 29. . . . . . . . . . . . . . . . . . . . .
Alarm Menu 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Select Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . .
Presets Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Utility Menu 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menu Conventions
Once you have entered a menu, use the arrow keys and Enter, as shown Figure 11, to scroll the menu and select and confirm choices.
Figure 11: SDA601 Menu Conventions
The current status is indicated by the asterisk at the end of the se­cond line. In the display illustrated in Figure 12, for example, the asterisk tells you that 15 is the current horizontal position of the OSD (this item is in the Utility/OSD Setups submenu; see page 32). The asterisk will disappear if you press the ue to 16. It will reappear if you then press new position.
SDA 601 Serial Digital Analyzer User Manual
" key once to change the val-
Enter to confirm 16 as the
27
Reference
Figure 12: The OSD Setups/Horizontal Position Item
Number Entry: In many cases, numbers may be entered directly from the keypad. In the “Horiz Position” item, for example, you can enter the desired location with the number keys 0 through 9—see the following illustration—without first pressing
Shift.
28
Figure 13: The SDA Number Keys
Note that once the new horizontal coordinate has been entered through the keypad and is visible on the LCD, you must press
Enter
twice to confirm the change. The first press completes the numeric entry; the second makes the entry permanent. If you leave the menu or submenu without confirming the entry with a second press of the Enter key, the setting will revert to its previous value. Just remember to press
Enter repeatedly until the asterisk appears.
NOTE. In the menu listings that follow, the factory default for each item is the first listed option. Defaults for items that can be set within a range of numeric values are given within square brackets [for example] on the option line.
SDA 601 Serial Digital Analyzer User Manual
Reference
Watch Menu (groups enabled)
Enter the Watch menu by pressing Shift, then Watch. Configure the menu for Group or Item selection through the Utility menu; see page 33. See page 17 for a list of the items in each group.
(1) Data Value Grp
Off <> Watch
(2)
Format Group
Off <> Watch
(3)
CRC Chnge Group
Off <> Watch
(4)
EDH Group
Off <> Watch
Watch Menu (items enabled)
(1) Line Std Detect
1
<> Alarm if 625 <> Alarm if 525
2
<> Alrm if 8 bits <> Alrm if 10 bits
3
(2)
(3)
(4)
(5)
Off <> Watch
Video Missing
Off <> Watch
AP Bits (8/10)
Off <> Watch
EDH packet miss
Off <> Watch
Embedded Audio
Off <> Watch
(6)
Stuck Bit Detec
Off <> Watch
(7)
Other ANC Data
4
Off <> Watch
(8)
Illegal Value
Off <> Watch
(9)
Video Ovr Range
Off <> Watch
(10)
Line/Field Len
Off <> Watch
1
Status is reported but not treated as an error.
2
Word length is reported.
3
Missing
4
Ancillary data packet, which is neither Audio nor EDH, is detected.
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Reference
(11) EAV/SAV/TRS err
Off <> Watch
(12)
ANC Format Erro
Off <> Watch
(13)
Zero Length ANC
Off <> Watch
(14)
AP CRC change
Off <> Watch
(15)
FF CRC change
Off <> Watch
(16)
AP CRC Not
Off <> Watch <> Alarm Not
(17) AP EDH error
Off <> Watch
(18)
FF EDH error
Off <> Watch
(19)
Flag Set
Off <> Watch
(20)
Clear All Items
Press Enter
5
6
Alarm Menu
Enter the Alarm menu by pressing Shift, then Alarm On/Off.
(1) Beeper
Beep: Off <> Long <> Short <> Tick
(2)
(3) Alarm On/Off
5
Non–zero APCRC is reported as an error and will trigger an alarm, if set.
6
Sets all items to Off.
7
Only when alarms are toggled On.
8
Independent of alarm settings.
9
Duplicates the action of the Alarm On/Off key.
Print Errors
Off <> Log each Error
9
Off <> On
7
<> Log every 10s
8
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SDA 601 Serial Digital Analyzer User Manual
I/O Menu
Enter the I/O menu by pressing Shift, then Insert On/Off.
(1) Highlighting
No Display <> Display
Reference
(2)
(3)
(4)
(5)
Dim Video
Off <> On
Video Cursor
No Display <> Display
Pulse Cross
Normal <> HCross <> VCross <> Both
AUX
Pixmon Y <> Pixmon R–Y <> Pixmon B–Y
Display Select Menu
Enter the Display Select menu by pressing Display Select.
(1) Disp Sig Level
On <> Off
(2)
(3)
Disp Cursr Data
Off <> On
Disp Cur Time
Off <> On
10
Presets Menu
Enter the Presets menu by pressing Shift, then Display Select.
(1) Recall Preset
Preset 1 <> Preset 2 <> Preset 3
(2)
Save Preset
Preset 1 <> Preset 2 <> Preset 3
Utility Menu
Enter the Utility menu when the instrument is Watching or Idle (as indicated on the LCD) by holding
Note that some items in the Diagnostics submenu—are for use by qualified service personnel only (these items are marked with a ✝)
10
Current time and date, set through the Utility menu.
SDA 601 Serial Digital Analyzer User Manual
Lock Out down while pressing ON.
31
Reference
symbol); see the SDA 601 Service manual (Tektronix p/n 070-8914-0x) for instructions on their use.
(1) OSD Setups...
Press Enter (a)
OSD On/Off
11
On <> Off
(b)
Horiz Position
0 <> MAX=31 [default = 5]
(c)
Vert Position
MIN = 0 <> MAX = 31 [default = 11]
(d)
Set char Size
Medium <> Big <> Small
(e)
Previous Menu
Press Enter
(f)
Set char colors
White on Black <> Black on White <> White w/outline
<> Black w/outline
(2)
Printer Setup..
Press Enter (a)
Page Limit
12
Min = 0 <> Max = 250 [default = 10]
(b)
Top of Form
Form Feed <> End of Lines
13
<> 3 End of Lines
(c) Line per Page
Min = 0 <> Max = 250 [default = 60]
(d)
End of Line
Line Feed (LF) <> CarriageRet(CR) <> CR and LF
(e)
Previous Menu
Press Enter
(3)
RS232 Setup...
Press Enter
14
(a)
Set Baud Rate
9600 <> 4800 <> 2400 <> 1200 <> 300
(b)
Set Parity
None <> Odd <> Even <> Mark <> Space
11
Supersedes Insert On/Off key.
12
Pages containing the number of lines set in (c). Min/0 setting is equivalent to “no limit.” The
page count is reset when Watch is started or restarted.
13
As selected in item (d).
14
Three end of lines as selected in item (d), may be used as an alternative to Form Feed in order
to save paper.
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SDA 601 Serial Digital Analyzer User Manual
(4)
Reference
(c) Previous Menu
Press Enter
Watch Menu Type
Group Select <> Item Select
(5)
(6)
(7)
LCD Contrst Adj
MIN = 020 <> MAX = 80 [default = 80]
Set Time
Press Enter
Diagnostics...
Press Enter (a)
(b)
(c)
(d)
Show SW/FW Vers
Press Enter
Power Manage ..
Press Enter
1)
Battery Type
Rechargeable <> Alkaline
2)
LCD Backlight
Timed Turn Off <> On all the time
3)
Auto Power Off
Disabled <> Enabled
4)
Previous Menu
Press Enter
Device Tests..
Press Enter
1)
Test Beeper
Press Enter
2)
LCD Pattern
Press Enter
3)
Clear OSD
Press Enter
4)
Fill OSD Screen
Press Enter
5)
Keypad Test
Press Enter
6)
RS232 loop thru
Press Enter
Previous Menu
7) Press Enter
NVRAM/TIC Dgs..
Press Enter
Get TIC Serial
1) Press Enter
2)
Get TIC Time
Press Enter
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33
Reference
(e)
(f)
(g)
(h)
3) Read TIC Memory <> 0 *
4)
Factory Reset
Press Enter
5)
Previous Menu
Press Enter
Flash Diags..
Press Enter
1)
Checksum Memory
Press Enter
2)
Read Byte 10000
Press Enter
Writ Byte 10000
3) MIN = 0 <> MAX = 255
4)
Erase Sec 10000
Press Enter
5)
Read SLM Cals
Press Enter
6)
Write Byte Loop
MIN = 0 <> MAX = 255
7)
Previous Menu
Press Enter
Calibration..
Press Enter
1)
Calibrate SLM
Press Enter
2)
Adj Serial Pot
MIN = 0 <> MAX = 511
3) Previous Menu Press Enter
FW Upgrade
Press Enter
1)
Show Cur Bank
Press Enter
2)
Download
Press Enter
3)
Copy B1 to B
Press Enter
4)
Previous Menu
Press Enter
Write Test Reg
tr: 0 <> 255
15
16
15
Will reset the instrument to factory defaults.
16
Value is adjusted during manufacture. To be changed only by qualified service personnel; see
the Service manual, Tektronix p/n 070-8914-0x.
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SDA 601 Serial Digital Analyzer User Manual
(i) Previous Menu
15

The AUX Output

The analog signal present at the SDA 601 AUX output is derived from the Serial Video input. It is a single channel, 5-bit decoded and unfiltered, suitable for identifying the input and displaying the cursor cross hairs, Highlighting, and OSD.
The AUX choices in the I/O menu are: Pixmon Y; Pixmon R–Y; and Pixmon B–Y. As you might guess, this determines which of the three video components is shown on the video monitor . The behavior and appearance of the cross hairs, Highlighting, and OSD are not af­fected by this choice.
Reference
Press Enter

RS-232 Connector

The RS-232 connector is 9-pin subminiature D-type connector that provides a serial interface for printer output and eventual in-field software upgrades. It has a driver built in for RS-232 serial binary data interchange. The operational mode is full duplex; data type is asynchronous. Baud rate and parity are selected throuth the Utility/ RS232 Setup submenu; see page 32. The pin assignments are listed in Table 1.
Table 1: RS-232 Connector Pin Assignments
69
RS-232
Pin Data Connection
1 Not connected 2 RXD (Received Data) from SDA 601
15
3 TXD (Transmitted Data) to SDA601 4 Not connected 5 Signal Ground 6 Not connected 7 RTS (Request to Send) to SDA601 8 CTS (Clear to Send) from SDA 601 9 Not connected
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35
Reference
The connector pinout has been chosen to interface directly with an IBM PC/AT 9-pin serial port using a straight-through cable. A simple ribbon cable may be adequate.
For logging errors and printing reports, a “null-modem” cable may be required, depending on the pinout of the printer connector . Con­sult your printer manual to determine compatibility.
Because of space limitations on the connector end of the SDA 601, you may have to insert a 9-pin adapter between the cable and the connector. If the cable has a female end, use a male/male adapter such as ITT Cannon p/n 111805–1.
RS-232/Printer Setups
Set the printer to software flow control (XON/XOFF), if possible. Specify 60 lines per page (in the Utility/Printer Setup submenu) for
most printers using 8.5 x 11.0 inch paper. Set the Baud rate and Parity—through the Utility/RS-232 Setup sub-
menu—to match the printer . When in doubt, set Parity to None.

Using the Watch Mode

Here are some notes and hints regarding the use of the SDA 601 Watch mode to verify the integrity of Serial Digital Video signals.
Format Error Checking
Format error checking is normally useful for verifying that equip­ment has been designed to conform the various signal format and interface standards. Format errors should not be routinely present. If a signal is being altered by transmission errors, then there is a proba­bility that resulting bit errors will cause some format errors which are detectable by the SDA 601.
The SDA 601 monitors some specific format error conditions, and if format errors occur in at least three video lines in a single field, this is evidence of signal transport errors.
36
The format errors that may be used to indicate the likelihood of transport errors are:
SDA 601 Serial Digital Analyzer User Manual
Reference
H EAV/SAV mis-format — derived by decoding the EAV/SAV
protection bits for errors.
H EAV/SAV incorrect placement — which may be the result of a
receiver momentarily losing clock sync to the received signal, and thereby adding or dropping a data bit. This may also result from a bit error altering an EAV or SAV so that its presence is unrecognizable.
H Illegal data — whereby the reserved values of 000-003
(00.0-00.3) or 3FC-3FF (FF.0-FF.3) are improperly present.
H ANC format error — derived from checking the checksum and
parity information in ancillary data packets.
Practically speaking, a video signal that fails the last check is most certainly seriously impaired. This check is provided because it works with in-service equipment operating without the benefit of any source signal encoding whatsoever. In the absence of either fixed signal patterns or signal encoding, this is a criterion for judging transport layer signal corruption which can be automated and applied to video signals (and video content) which can be expected in com­mon use.
Video Missing/Interrupted — If EAVs and SAVs are missing or corrupted beyond recognition, for a period of approximately seven video lines, the SDA 601 will assume that video is utterly corrupted or entirely missing. When this occurs, the instrument artificially maintains a horizontal and vertical reference which ignores the input signal. When this condition occurs, and all attempts to reestablish synchronization to the input signal fail, this failure is reported as “V ideo Missing.”
In order to reestablish horizontal and vertical synchronization to the input signal, the SDA 601 must be able to recognize the presence of EAVs in the incoming signal for 64 consecutive video lines. When this is achieved, then horizontal synchronization is immediately rees­tablished. Vertical synchronization is achieved at the beginning of the next vertical interval.
If the synchronization is lost and restored, this condition is reported as “Video Interrupted.”
Either of the “Video Missing” and “Video Interrupted” conditions indicate gross equipment or transmission failure, and should never occur in normally configured equipment.
SDA 601 Serial Digital Analyzer User Manual
37
Reference
Using the CRC Change Watch Group
The three items in the CRC change Watch group—ØAPCRC, FFCRC Changed, and APCRC Changed—are designed to facilitate the testing of equipment or signals that don’t have EDH encoding.
ØAPCRC — If you are testing equipment that won’t pass the verti­cal interval, but will pass the entire active picture area, then ØAPCRC is an excellent test method. Vision mixers (production switchers) and some VTRs or still stores are typical examples of equipment that can benefit from this test method.
ØAPCRC is an encoding process in which the last five video words in the last full line of active video are altered so that the CRC of the active picture words for the entire field will be exactly zero (Ø).
The SDA 601 calculates the same Active Picture CRC (APCRC) that is used for EDH error checking. The SDA 601 can recognize that this CRC is consistently Ø for each field, and will then assume that any occurrence of a non-zero CRC is the result of a signal propagation error . This check is as reliable as the APCRC check in the EDH checking method.
Because ØAPCRC encoding does modify the active video signal, the method may not be acceptable in all operational cases. As a practical consideration. however , the encoding results in a small bright spot in the very bottom right corner of the active picture, where it is not nor­mally visible on overscanning monitors or receivers. Furthermore, the encoding is designed to not introduce any illegal data values that might provoke video signal processing errors in conventional opera­tional video equipment.
Another advantage of this method is that it doesn’t require a fixed test signal and may be applied to any legal digital component or composite format signal.
This method of signal checking will not work if the equipment being tested does not pass the entire active video line, or if a 10-bit signal encoded with ØAPCRC is passed through an 8-bit transmission link. Eight-bit signals which are encoded may be used to check either 8-bit equipment or the eight higher-order bits of 10-bit equipment, and 10-bit signals which are encoded may be used to check 10-bit equipment.
38
FFCRC Changed — Is an out-of-service check for either 8-bit or 10-bit equipment which will not pass EDH, or for which EDH en-
SDA 601 Serial Digital Analyzer User Manual
Reference
coded signals are not available. This check requires a fixed (un­changing) video signal.
The SDA 601 calculates the Full Field CRC (FFCRC) that is used for EDH error checking. Then, for this check, the SDA 601 compares the calculated CRC in each field to the CRC calculated for the same field in the previous frame. If the incoming video signal is fixed, then the calculated CRCs should be identical from frame to frame. If the CRCs are not identical, either the transmitted signal has been deliberately changed, or a transmission error has altered the signal.
This check has some limitations. As noted, the signal must be pre­sumed to be fixed, and the equipment being checked must therefore be temporarily removed from service. Also, embedded audio ancil­lary data is by its nature changing from field to field; therefore, this check will be useless if audio is embedded in the signal. In the case of embedded audio, APCRC Changed is a more appropriate check method.
APCRC Changed — Is also an out-of-service check, very similar to the FFCRC Changed checking method, except the checking is lim­ited to the active picture data only. This allows the check to be used with signals that have constantly changing ancillary data, as do sig­nals that contain embedded audio.
With this checking method, data in the vertical and horizontal re­gions is completely unchecked.
SDA 601 Serial Digital Analyzer User Manual
39
40
SDA 601 Serial Digital Analyzer User Manual

Appendix A: Characteristics

The information in this section is included for the convenience of the SDA 601 operator. For a full list of instrument specifications, as well as performance verification and adjustment procedures, please see the SDA 601 Service Manual (Tektronix p/n 070-8914-
NOTE. Shielded cables were used in the EMI certification of this instrument; therefore, it is recommended that shielded cables be used when operating. (EC 92)

Safety Standard Compliance

The following safety standards apply to the SDA 601: H ANSI S82 — Safety Standard for Electrical and Electronic Test,
Measuring, Controlling, and Related Equipment, 1988.
XX).
H CAN/CSA C22.2 No. 231 M89 — CSA Safety Requirements for
Electrical and Electronic Measuring and Test Equipment.
H IEC1010-1 — Safety Requirements for Electrical Equipment for
Measurement, Control, and Laboratory Use (1990).
H UL1244 — Standard for Electrical and Electronic Measuring and
Testing Equipment, Second Edition (1980).
SDA 601 Serial Digital Analyzer User Manual
41
Appendix A: Characteristics
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Specification Tables

Table 2: Serial Digital Video Input
ББББББББББББББББББББ
Characteristic
ББББББ
Performance
БББББ
Requirements
Supplemental Information
БББББББ
Format
ББББББ
ББББББ
Input Impedance Input Level
ББББББ
Return Loss Serial Receiver
Equalization Range
ББББББ
ББББББ
ББББББ
Error detection protocols supported
Table 3: AUX Output
CCIR 601 Component 525/625,
БББББ
БББББ
БББББББ
10 bits data, Scrambled NRZI; 270 Mb/s. Complies with SMPTE
БББББББ
259M and CCIR 656. 75 800 mV ± 80 mV (peak-to-peak)
БББББ
БББББББ
at signal source 15 dB 1 MHz to 270 MHz Proper operation with up
to 15 dB loss at 135 MHz
БББББ
using coaxial cable with
БББББ
Ǹ
loss characteristics.
1?
f
800 mV launch amplitude.
БББББ
Nominally 150 m of Belden 8281
coaxial cable;
БББББББ
typically up to 200 m.
БББББББ
БББББББ
EDH (RP-165), 0APCRC
Characteristic
ББББББ
Output White Amplitude Sync Amplitude DC Offset Quantization Impedance Return Loss
42
Performance Requirements
700 mV ± 25%
300 mV ± 25%
500 mV
БББББ
SDA 601 Serial Digital Analyzer User Manual
Supplemental Information
БББББББ
5-bit output; monochrome signal
Terminated into 75
Terminated into 75
Terminated into 75
22 mV
75 nominal
10 dB to 10 MHz
Appendix A: Characteristics
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Á
Table 4: Signal Level Meter
БББББББББББББББББББББ
Characteristic
Resolution
Information
2 dB @ 135 MHz
T able 5: Physical Characteristics
БББББББББББББББББББББ
Characteristic
Height Width Depth
Information
5.6 cm (2.2 in)
9.1 cm (3.6 in)
19.1 cm (7.5 in)
Net Weight
SDA 601
ББББББ
SDA with battery pack
Shipping Weight
0.48 kg (1.06 lb)
ББББББББББББББ
0.68 kg (1.5 lb)
1.50 kg (3.31 lb) with AC adapter
T able 6: Environmental Characteristics
Characteristic Information
Temperature
Operating
ББББББ
Storage
0° C to +35° C (32 to +95° F)
ББББББББББББББ
–30° C to +65° C (–22 to +149° F)
Altitude
ББББББ
Operating Storage
ББББББ
Equipment Type Equipment Class Installation Category
ББББББ
Pollution Degree Transportation
ББББББ
ББББББББББББББ
to 15,000 feet (4572 m); IEC 1010-1 compliance to 2000 m to 50,000 feet (15420 m)
ББББББББББББББ
Test Class III (as defined in IEC 1010-1, Annex H) Category II (as definded in IEC 1010-1, Annex J)
ББББББББББББББ
Note: Rated for indoor use only. Pollution Degree 2 (as defined in IEC 1010-1) Meets the requirements of NTSB Test Procedure 1A, category
II (24 inch drop)
ББББББББББББББ
SDA 601 Serial Digital Analyzer User Manual
43
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SDA 601 Serial Digital Analyzer User Manual

Appendix B: Replaceable Parts

The following replaceable parts for the SDA 601 are available through your local Tektronix, Inc. field office or representative.
It is important when ordering parts to include the following informa­tion in your order: Part number; instrument type and number; instru­ment serial number; and modification number, if applicable.
Description Tektronix Part No.
Instructions (card) 070-8912-xx Service Manual (Optional accessory) 070-8914-xx Rechargeable Battery Pack (Optional accessory) 119-4488-00 Carrying Pouch 016-1229-00 AC Adapter 119-4538-00 Case Assembly , Top 614-0921-00
1
Case Assembly , Bottom 614-0913-00 Battery Door 200-4075-00 LCD Display 119-4506-00 Rear Panel Assembly 333-4146-01 Fuse, 2A 159-0378-00 Touch Memory/Timer Module 156-4357-00 Stand 386-6897-00
1
The U.S. standard adapter. See your Tektronix representative for other adapters.
SDA 601 Serial Digital Analyzer User Manual
45
46
SDA 601 Serial Digital Analyzer User Manual

Appendix C: User Service

Battery Hints

For optimal battery life and capacity, use the rechargeable NiCad battery pack (Tektronix p/n 119-4488-00) in full char ge/discharge cycles. In other words, fully discharge the battery pack before re­charging, and then charge the battery pack until fully char ged, approximately 16 hours. A new battery pack will take a few charge/ discharge cycles to reach full capacity.
WARNING. Install or replace batteries only with the instrument switched OFF and the AC adapter disconnected.
Replace the batteries only with standard AA batteries (1.2–1.5 V, nominal), or with the optional rechargeable battery pack.
Setting the Auto Power Off and Battery Type functions in the Utility/ Diagnostic/Power Manage submenu (see pages 9 and 33) also has an impact on battery life. The battery types are Alkaline (disposable) or rechargeable (NiCad). Setting the battery type changes the voltage thresholds for both the BATTERY LOW display message and low­battery shut down.
The BATTERY LOW Message
The warning “BATTERY LOW” will appear on the second line of the SDA 601 display when the battery voltage drops below a prede­termined level. The level depends on the Battery Type setting. The SDA will operate for approximately ten minutes after the message first appears. For best results, replace or recharge the batteries when you first see this warning.
Low-battery Shut Down
To prevent erratic operation at very low power levels, the SDA 601 will shut itself down if the battery voltage drops below a second, lower threshold that also depends on the Battery Type setting.
SDA 601 Serial Digital Analyzer User Manual
47
Appendix C: User Service
Low-battery shut down can happen with little or no warning if, for instance, the instrument has been left on by mistake with Auto Power Down disabled. In such cases, the SDA 601 is likely to shut itself down almost immediately the next time you switch it on. If this happens:
h Install fresh batteries or operate the instrument with the AC
adapter, and
h Confirm that the diagnostic menu Battery Type setting is ap-
propriate.
The shut down threshold is higher for rechargeable batteries than for disposable. Therefore, you will receive a false BATTERY LOW message and may experience premature shut down if using Alkaline batteries when the Battery Type is set to “rechargeable.” On the other hand, NiCad batteries may be damaged—they can lose their “rechar­geability”—if they are discharged to the SDA 601 threshold for dis­posable batteries. Be sure to select the correct Battery Type.
Replacing the Batteries or Battery Pack
To install AA batteries or the battery pack, open the battery compart­ment of the SDA 601 by pressing down on the cover and sliding it in the direction of the inscribed arrow, as shown above. When the cover tabs line up with the slots in the case, lift the cover away from the instrument. Install batteries in alternating directions as indicated by the graphic molded into the “floor” of the battery compartment. If
48
SDA 601 Serial Digital Analyzer User Manual
Appendix C: User Service
using the optional battery pack, take the time to identify both con­tacts and install the pack properly.

Replacing the Touch Memory/Timer Module

The Touch Memory/Timer module has an internal Lithium battery. Eventually, this module will need replacement. Please refer this task to qualified service personnel. The original module has been secured to its holder with RTV sealant. Take the time to renew this sealant after a new module is installed.
The instrument Date/Time must be reset when a new Touch Memory is installed. See page 9.

Preventive Maintenance

Under average conditions, the SDA 601 should receive preventive maintenance every 2000 hours. This is approximately one year of operation. Preventive maintenance includes cleaning, visual inspec­tion, a performance check and, if necessary, calibration. See the Ser­vice manual for performance verification and adjustment procedures.
CAUTION. The SDA 601 case is made of molded plastic. Do not allow water to get inside any enclosed assembly or component. Do not clean any plastic materials with organic cleaning solvents—benzene, toluene, xylene, acetone, or similar compounds—because they may damage the plastic.
SDA 601 Serial Digital Analyzer User Manual
49
50
SDA 601 Serial Digital Analyzer User Manual

Glossary

ØAPCRC (zero active picture CRC)
A CRC created by an encoding process in which the last five active video words in the last full line of active video are altered so that the active picture CRC is exactly zero.
4:2:2
A commonly used term for a component digital video format. The details of the format are specified in the CCIR-601 standard document. The numerals 4:2:2 denote the ratio of the sampling frequencies of the single luminance channel to the two color difference channels. For every four luminance samples, there are two samples of each color difference channel. See CCIR-601.
AES/EBU
Informal name for a digital audio standard established jointly by the Audio Engineering Society and European Broadcasting Union.
analyze
When signal (if possible) and monitors it for one second. The status of a predefined set of signal characteristics (“conditions”) may then be read on the instrument LCD—and the OSD, when an external video monitor is used.
ancillary (ANC) data
Auxiliary, non-video data that is inserted into any portion of the data stream that is not occupied by timing reference signals or video data. Component digital signals may have ancillary data in both the vertical and horizontal interval portions of the signal; composite may have only it only in the horizontal. Described in SMPTE 125M.
Ancillary data may include up to 16 channels of digital audio as well as the calculated checkwords (CRCs) and error information flags (EDH flags) that are used in verifying the integrity of the digital signal and locating the source of any faults.
Analyze is pressed the SDA 601 locks to the incoming
SDA 601 Serial Digital Analyzer User Manual
51
Glossary
APCRC (active picture CRC)
A CRC derived from the samples in the active picture only. Described in SMPTE RP 165.
AUX
In the SDA 601, the auxiliary output. The AUX output can be configured as analog “pseudo-video” (unfiltered DAC output) or as the trigger pulse.
bit serial
Bit-wise transmission of digital video down a single conductor such as coaxial cable. May also be sent through fiber optics. This standard is covered under CCIR 656.
bit stream
A continuous series of bits transmitted on a line.
cable equalization
The process of altering the frequency response of a video amplifier to compensate for high frequency losses in coaxial cable.
CCIR
International Radio Consultative Committee, an international standards committee, now replaced by ITU-R.
CCIR 601
(See ITU-R BT.601.)
CCIR 656
The physical parallel and serial interconnect scheme for CCIR-601. CCIR-656 defines the parallel connector pinouts as well as the blanking, sync, and multiplexing schemes used in both parallel and serial interfaces. Reflects definitions in EBU Tech 3267 (for 625 line signals), SMPTE 125M (parallel 525), and SMPTE 259M (serial 525).
52
clock recovery
The reconstruction of timing information from digital data.
SDA 601 Serial Digital Analyzer User Manual
coding
Representing each level of a video signal as a number, usually in binary form.
component analog
The unencoded output of a camera, videotape recorder, etc., consisting of three primary color signals: red, green, and blue (RGB) that together convey all necessary picture information. In some component video formats, these three components have been translated into a luminance signal and two color difference signals, for example, Y, B–Y, R–Y.
component digital
A digital representation of a component analog signal set, most often Y, B–Y, R–Y. The encoding parameters are specified by CCIR 601. The parallel interface is specified by CCIR 656 and SMPTE 125M (1991).
Glossary
CRC (Cyclic Redundancy Code)
A binary number that is computed from the digital samples in the serial digital video frame. CRCs serve a function similar to that of the Parity Bit in the RS-232 serial interface, and are used to verify the integrity of the digital video transmission. SMPTE RP 165 defines a full field CRC (FFCRC) and an active picture CRC (APCRC).
CRC change group
An SDA 601 Watch group that contains:
G APCRC changes G FFCRC changes G APCRC status (Ø or not Ø)
The CRCs are monitored; changed CRCs and non–Ø APCRCs are reported on an “error second” basis.
cursor
In the SDA 601, the “cursor” is used to pinpoint a single word in the digital video frame and discover the actual value of the selected word and the three that follow. The location of the cursor may also be shown with “cross hairs” on a video monitor connected to the AUX output.
SDA 601 Serial Digital Analyzer User Manual
53
Glossary
data value group
An SDA 601 Watch group that contains:
G Illegal (data word) values G Video samples in/out of range
The data word values are monitored; illegal values and out of range samples are reported on an “error second” basis.
D1
A component digital video recording format that uses data conforming to the CCIR-601 standard. Records on 19 mm magnetic tape. (Often used colloquially to indicate 4:2:2 component digital video.)
deserializer
A device that converts serial digital information to parallel.
digital word
The number of bits treated as a single entity by the system. Digital video words are 8 or 10 bits. In the active picture portion of digital video, each word represents a single luminance or color difference sample.
EAV
End of active video in component digital systems.
EBU
European Broadcasting Union. An organization of European broadcasters that, among other activities, produces technical statements and recommendations for the 625/50 line television system.
EBU TECH.3267-E
The EBU recommendation for the parallel interface of 625 line digital video signal. A revision of the earlier EBU Tech. 3 246-E, which in turn was derived from CCIR-601 and contributed to CCIR-656 standards.
54
EDH (error detection and handling)
Proposed SMPTE RP-165 for recognizing inaccuracies in the serial digital signal.
SDA 601 Serial Digital Analyzer User Manual
EDH flag
A digital “marker” inserted in the data stream to feed forward information regarding detected errors. EDH flags are set by many input/output devices to help identify faulty equipment in the signal path. The flags defined in RP-165 are: error detected here; error detected already; internal error detected here; internal error detected already; and unknown error status.
EDH Group
An SDA 601 Watch group that contains:
G APCRC EDH errors G FFCRC EDH errors G EDH flags (set/not set)
The CRCs and flags are monitored. Flag status is reported, but not considered an error condition; EDH errors are reported on an error second basis.
Glossary
Equalization (EQ)
Process of altering the frequency response of a video amplifier to compensate for high-frequency losses in coaxial cable.
embedded audio
Digital audio is multiplexed onto a serial digital data stream.
error second
A second that contains at least one error . An error second can result from one isolated error, or a “burst” of many errors all in the period of one second.
FFCRC (full field CRC)
A CRC derived from the samples in a full field of digital video. Described in SMPTE RP-165.
format group
An SDA 601 Watch group that contains:
G Line/field length G TRS (includes EAV and SAV) G ANC format G Zero-length ANC
SDA 601 Serial Digital Analyzer User Manual
55
Glossary
The four characteristics are monitored. Errors in line/field length, TRS, or ANC format are reported on an error second basis; Zero­length ANC is considered an error, and error seconds are also reported.
group
See Watch Group.
highlighting
An SDA 601 operating mode in which pixels in the AUX output that correspond to selected error conditions “flash” when that error occurs. Permits visual monitoring of the frequency and placement of the errors in context of the video signal and picture.
horizontal interval (horizontal blanking interval)
The time period between lines of active video. In serial digital video, it is the time between EAV and SAV.
illegal value
Data levels 0 to 3 and 1020 (3FC
) to 1023 (3FFh) are reserved
h
to indicate timing references. These values are considered illegal if they occur elsewhere.
in range (video)
All video words are within the permissible range of values; luminance between levels 64 and 940 (40 difference between levels 64 and 960 (40
and 3ACh), and color
h
and 3C0h).
h
I/O menu
The SDA 601 I/O menu containing selections for configuring the AUX pseudo-video output.
ITU-R
The International Telecommunication Union, Radio Commu­nication Sector (replaces the CCIR).
ITU-R BT.601
An international standard for component digital television from which was derived SMPTE 1 25M (was RP-l25) and EBU 3246E standards. CCIR defines the sampling systems, matrix
56
SDA 601 Serial Digital Analyzer User Manual
values, and filter characteristics for both Y, B–Y, R–Y and RGB component digital television.
LSB
Least significant bit.
MSB
Most significant bit.
multiplexer (mux)
Device for combining two or more electrical signals into a single, composite signal.
NRZ
Non return to zero. A coding scheme that is polarity sensitive. O = logic low, 1 = logic high.
Glossary
NRZI
Non return to zero inverse. A video data scrambling scheme that is polarity insensitive. O = no change in logic; 1 = a transition from one logic level to the other.
OSD (on-screen display)
In the SDA 601, a 12 line, 24 column character display that may be superimposed on the AUX output and viewed on an attached video monitor . For convenient review of Analysis results and Watch status.
pixel
The smallest distinguishable and resolvable area in a video image. A single point on the screen. In digital video, a single sample of the picture. Derived from the words picture element.
preset, Presets Menu
In the SDA 601, the current instrument configuration may be saved as a preset for later recall. Presets are saved and recalled through the Presets Menu.
pulse cross
An SDA 601 AUX output mode that allows the user to “see” the horizontal and/or vertical intervals, which are normally blanked
SDA 601 Serial Digital Analyzer User Manual
57
Glossary
in serial video monitors. The original four-word timing reference signals (TRS, which include EAV and SAV) are replaced with legal video samples, and analog H and V syncs inserted in the original active picture region.
Rec. 601
See CCIR-601.
reclocking
The process of clocking the data with a regenerated clock
resolution
The number of bits (four, eight, ten, etc.) determines the resolution of the digital signal.
4-bits = a resolution of 1 in 16 8-bits = a resolution of 1 in 256 10-bits = a resolution of 1 in 1024
Eight bits is the minimum acceptable for broadcast TV.
RP-125
See SMPTE 125M.
SAV
Start of active video in component digital systems.
scrambling
1. To transpose or invert digital data according to a prearranged scheme in order to break up the low frequency patterns associated with serial digital signals. 2. The digital signal is shuffled to produce a better spectral distribution.
serial digital
Digital information that is transmitted in serial form. Often used informally to refer to serial digital television signals.
58
SMPTE (Society of Motion Picture and Television Engineers)
A professional organization that recommends standards for the television and film industries.
SDA 601 Serial Digital Analyzer User Manual
SMPTE 125M
Recommended practice for bit parallel digital interface for component video signals. SMPTE 125M defines the parameters required to generate and distribute component video signals on a parallel interface.
SMPTE RP-165
Recommended practice for “Error detection checkwords and status flags for use in bit-serial digital interfaces for television.” It defines the APCRC, FFCRC, and EDH flags as well as the ancillary data packets that contain them.
SMPTE 244M
The SMPTE recommended practice for bit parallel digital interface for composite video signals. SMPTE 244M defines the parameters required to generate and distribute composite video signals on a parallel interface.
Glossary
SMPTE 259M
The SMPTE recommended practice for 525 line serial digital component and composite interfaces.
stuck bit
A bit in the video sample words that has the same value (0 or 1) for the entire active picture region of at least one complete field. A stuck bit may indicate a defective component in the digital video system “upstream” of the SDA 601.
synchronous
A transmission procedure by which the bit and character stream are slaved to accurately synchronized clocks, both at the receiving and sending end.
sync word
A synchronizing bit pattern, differentiated from the normal data bit patterns, used to identify reference points in the television signal; also to facilitate word framing in a serial receiver .
transport layer
Having to do with the transmission path from a digital video generator to the receiver . The FFCRC, APCRC, and EDH flags
SDA 601 Serial Digital Analyzer User Manual
59
Glossary
are the primary means of monitoring the integrity of the transport layer .
TRS
Timing reference signals in digital video systems (four words long). Defined, for component systems, in SMPTE 125M.
truncation
Process by which digital signals are converted to lower resolution. The least significant bits (as many as necessary) in each sample are “stripped,” or simply ignored. In digital video, 10-bit samples may be truncated for compatibility with 8-bit equipment.
Utility Menu
The “catch-all” menu of the SDA 601 in which seldom-used configuration and diagnostic utilities are found. Selected by holding
Lock Out down while pressing ON.
video missing
Reported by the SDA 601 in both Analyze and Monitor modes when the EAV and SAV are absent from the digital signal.
Watch
The SDA 601 operating mode for monitoring selected characteristics of the input signal. User may set alarms to trigger on error conditions. Explained in detail beginning on page 16 of this manual.
Watch Group
In the SDA 601, a collection of related signal characteristics or “conditions” that, for convenience, may be selected for monitoring when the Watch menu is set to Group Select (through the Utility menu).
word
See digital word.
zero-length ANC
Reported by the SDA 601 when an ancillary data “Data Count word” with value Ø is detected.
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SDA 601 Serial Digital Analyzer User Manual
Manual Change Information
At Tektronix, we continually strive to keep up with the latest electronic developments by adding circuit and component improvements to our instruments as soon as they are developed and tested.
Sometimes, due to printing and shipping requirements, we can’t get these changes immediately into printed manuals. Hence, your manual may contain new change information on the following pages.
A single change may affect several sections. Since the change information sheets are carried in the manual until all changes are permanently entered, some duplication may occur. If no such change pages appear following this page, your manual is correct as printed.
MANUAL CHANGE INFORMA TION
Date: Change Reference:
10/13/94
M81605
Product: Manual P/N: Effective S/N:
SDA 601 Users 070–8913–01 B020000
Text Changes
OPERATING BASICS Displaying the Signal Level, Page 20 CHANGE the last sentence preceding the Cursor discussion TO READ:
After selecting another operating mode, the Signal Level display may be reselected by pressing the front panel be toggled On/Off through the
Display Select key/menu (see page 29).
Cursor, Page 20, CHANGE the Cursor discussion TO READ:
SLM (A) key, or may
Cursor
In Cursor mode, selected by pressing the Cursor (B) key, the SDA 601 is capable of locating a single word in the digital video frame and displaying the actual value of the selected word and the three that follow. The selected words location is pinpointed by “cross hair” cursors on a video monitor connected to the AUX output. The word is selected by positioning the cursor with the arrow keys. To com­pletely exit this mode, press the
The address/coordinates of the word, and its actual hexadecimal val­ue, may be viewed on the SDA 601 display, as shown in Figure 14.
Review (G) key .
Figure 14: The Cursor Data Display
Page 1 of 4
Date: Change Reference:
10/13/94
The first line of the cursor data display contains the hexadecimal values of the selected word and the three that follow it. Values typi­cal for the SAV timing and reference signal are shown in Figure 10. The video “type” of the selected word is indicated by the sample ID:
M81605
B = C
color difference
B
Y = Cosited luminance R = C
color difference
R
y (lowercase) = Isolated luminance
The second line contains the address or coordinates of the selected word. In the example, the selected word is number 1712 of line 4 in field 1.
The cursor movement icon is present on the second line when you can use the arrow keys to position the cursor . Normal cursor move­ment is one line for each press of the press of the
A or " key. Pressing Shift twice (to invoke shift lock)
Y or B key, and one word per
will increase horizontal movement to 20 words per key press, and vertical movement to 10 lines per key press. Press Shift again to re­turn to “fine” cursor control. The Cursor cross hairs in the AUX out­put may be turned off through the
The Cursor Data display may also be invoked through the
menu, but Cursor cross hairs must be enabled separately,
Select
through the
I/O menu (see page 29).
I/O menu (see page 29).
Display
Highlighting, Page 21, CHANGE the To use Highlighting example TO READ:
To use Highlighting:
1. Configure the SDA601 to monitor one or more of the above items; see “Watching a Signal” beginning on page 14.
2. Enter the I/O menu (press
Shift, then Insert On/Off).
3. The first I/O menu item is Highlighting. Use the select “On, Dim Video” then press
Enter to confirm the choice.
Dim Video reduces the video signal by 50%, ensuring good con­trast between the video signal and highlighted pixels.
4. Exit the I/O menu by pressing any rectangular key.
5. If necessary, start or restart the Watch session by pressing
Page 2 of 4
A or " key to
Watch.
Date: Change Reference:
10/13/94
6. The default OSD will obscure any highlighting in the portion of the picture that it occupies. Therefore, if the OSD is on, toggle it off with the
Insert On/Off key .
Pulse Cross, Page 22, CHANGE the Pulse Cross discussion TO READ:
Pulse Cross
Pulse Cross is an SDA 601 AUX output mode that allows the user to “see” the horizontal and/or vertical intervals, which are normally blanked in serial video monitors. The original four-word timing ref­erence signals (TRS, which contain EAV and SAV) are replaced with legal video samples, and analog H and V sync information is inserted in the original active picture region. To invoke pulse cross, press the
Pulse Cross (E) key , which will scroll through the pulse cross modes:
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Normal — the default HCross — reveals the “horizontal interval” region of the signal VCross — reveals the “vertical interval” region of the signal Both — combines HCross and VCross
To invoke pulse cross through the I/O menu:
1. Enter the I/O menu (press
2. Press the
B key repeatedly to scroll down to the Pulse Cross
Shift, then Insert On/Off).
menu item.
3. With the
A / " keys, scroll to the desired pulse cross option. The
options are: Normal — the default
HCross — reveals the “horizontal interval” region of the signal VCross — reveals the “vertical interval” region of the signal Both — combines HCross and VCross
4. Press
Enter to select the new option.
5. Press any rectangular key to exit the I/O menu.
Page 3 of 4
Date: Change Reference:
10/13/94
M81605
REFERENCE I/O Menu, Page 29
,
CHANGE the I/O Menu TO READ:
I/O Menu
Enter the I/O menu by pressing Shift, then Insert On/Off.
(1) Highlighting
Off <> On <> On, Dim Video
(2) (3) (4)
Video Cursor
No Display <> Display
Pulse Cross
Normal <> HCross <> VCross <> Both
AUX
Pixmon Y <> Pixmon R–Y <> Pixmon B–Y
Utility Menu, Page 30,
CHANGE the Printer Setup and RS232 Setup portions of the Utility Menu TO READ:
(2) Printer Setup..
Press Enter
(3)
(a) (b) (c) Line per Page (d) (e) (f)
RS232 Setup...
Press Enter (a)
(b) (c)
Page Limit
Min = 0 <> Max = 250 [default = 10]
Top of Form
Form Feed <> End of Lines Min = 0 <> Max = 250 [default = 60]
End of Line
Line Feed (LF) <> CarriageRet(CR) <> CR and LF
Flow Control
Software (XOFF) <> Hardware (DTR) <> None
Previous Menu
Press Enter
Set Baud Rate
19200 <> 9600 <> 4800 <> 2400 <> 1200 <> 300
Set Parity
None <> Odd <> Even <> Mark <> Space
Previous Menu
Press Enter
12
13
<> 3 End of Lines
14
Page 4 of 4
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