Tektronix 070-8811-08 User Manual
User Manual
764
Digital Audio Monitor
(Serial Number B020000 and Above)
070-8811-08
This document supports firmware version 2.1 and
above.
www.tektronix.com
Copyright © Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Warranty
Tektronix warrants that the 764 Digital Audio Monitor 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.
Table of Contents
General Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
This Manual xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unpacking 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical Installation 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the 764 to Your System 2. . . . . . . . . . . . . . . . . . . .
(1) Digital Audio Inputs and Loop-Throughs 3. . . . . . . . .
(2) Time Code Inputs 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(3) Reference Inputs 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(4) VGA Video Output 5. . . . . . . . . . . . . . . . . . . . . . . . . . .
(5) RS-232 Communications Port 6. . . . . . . . . . . . . . . . . .
(6) Optional Serial Video Loop-Through 7. . . . . . . . . . . . .
Headphones 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplying Power 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Power Up and Configuration 9. . . . . . . . . . . . . . . . . . . .
Operating Basics 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring an Audio Program with the Audio View 13. . . .
Session Reports 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring the Ancillary Data 15. . . . . . . . . . . . . . . . . . . . .
Other Features 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front-panel Controls 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Level Meters 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring the Level Meters 22. . . . . . . . . . . . . . . . . . . . . .
Sum and Difference Bars 25. . . . . . . . . . . . . . . . . . . . . . . . .
The Phase Display 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Lissajous Pattern 27. . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Correlation Meter 27. . . . . . . . . . . . . . . . . . . . . . . . . . . .
AGC 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Session Display 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
764 Digital Audio Monitor User Manual
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Table of Contents
Features of the Session Display 29. . . . . . . . . . . . . . . . . . . . .
Session Statistics 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Session Reports 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Channel Status View 37. . . . . . . . . . . . . . . . . . . . . . . . . . . .
The User Data View 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Saving and Restoring Setups 40. . . . . . . . . . . . . . . . . . . . . . . . . .
Saving a Setup 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restoring a Setup 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Editing a Setup 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Level Meters 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Meter Ballistics and Alignment Levels 43. . . . . . . . . . . . . . .
In-Bar Warning Messages 44. . . . . . . . . . . . . . . . . . . . . . . . .
Correlation Meter Algorithm 46. . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Headphone Channels 48. . . . . . . . . . . . . . . . . . . . . . . .
Submenus 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Level Meters Submenu 48. . . . . . . . . . . . . . . . . . . . . . .
The De-emphasis Submenu 53. . . . . . . . . . . . . . . . . . . . . . . .
The Phase Display Submenu 54. . . . . . . . . . . . . . . . . . . . . . .
Headphones Submenu 56. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Submenu 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Code Submenu 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Port Submenu 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Save Setups Submenu 59. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restore Setups Submenu 60. . . . . . . . . . . . . . . . . . . . . . . . . .
Screen Saver Submenu 60. . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Submenu 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the RS-232 Port 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Requirements 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Examples 64. . . . . . . . . . . . . . . . . . . . . . . .
Outputting a Session Report 66. . . . . . . . . . . . . . . . . . . . . . .
Remote Control Commands 66. . . . . . . . . . . . . . . . . . . . . . .
Appendix A: Specifications 75. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Error/Warning Messages 83. . . . . . . . . . . . . . . . . . .
Appendix C: Options 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Embedded Audio Input (Option 01) 89. . . . . . . . . . . . . . . . . . . .
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764 Digital Audio Monitor User Manual
Operating Information 90. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changes to the Session Statistics Display 92. . . . . . . . . . . . .
Additional Error/Warning Messages 92. . . . . . . . . . . . . . . . .
Analog Line Output (Option 02) 93. . . . . . . . . . . . . . . . . . . . . . .
Configuring the Output 95. . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Instrument 97. . . . . . . . . . . . . . . . . . . . . . . .
Power Cords 99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary 101. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 103. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Figures
Contents
Figure 1: The Tektronix 764 Digital Audio Monitor xi. . . . . . .
Figure 2: Rear view of the 764 in a Tektronix enclosure 2. . . .
Figure 3: The 764 rear panel and connectors 3. . . . . . . . . . . . .
Figure 4: Connecting the standard 764 to your system 4. . . . . .
Figure 5: Using an external color monitor 6. . . . . . . . . . . . . . .
Figure 6: Outputting a session report 7. . . . . . . . . . . . . . . . . . .
Figure 7: The headphone output (schematic) 8. . . . . . . . . . . . .
Figure 8: Controls for initial power up and configuration 9. . .
Figure 9: The top menu HELP message 10. . . . . . . . . . . . . . . . .
Figure 10: Selecting from the top menu 11. . . . . . . . . . . . . . . . .
Figure 11: The inputs submenu 12. . . . . . . . . . . . . . . . . . . . . . . .
Figure 12: The 764 AUDIO/SESSION view 14. . . . . . . . . . . . .
Figure 13: The 764 AUDIO/PHASE view 15. . . . . . . . . . . . . . .
Figure 14: 764 front-panel controls 17. . . . . . . . . . . . . . . . . . . .
Figure 15: The 764 Level Meters 19. . . . . . . . . . . . . . . . . . . . . .
Figure 16: The sum and difference display modes 20. . . . . . . . .
Figure 17: Creating a custom meter scale 23. . . . . . . . . . . . . . . .
Figure 18: The Level Meters submenu 24. . . . . . . . . . . . . . . . . .
Figure 19: Soft buttons and numeric settings 24. . . . . . . . . . . . .
Figure 20: Sum and difference bars and the session display 26.
764 Digital Audio Monitor User Manual
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Table of Contents
Figure 21: The 764 phase display 27. . . . . . . . . . . . . . . . . . . . . .
Figure 22: The phase correlation meter 28. . . . . . . . . . . . . . . . .
Figure 23: The 764 AUDIO/SESSION view 29. . . . . . . . . . . . .
Figure 24: The SYNC ERR Flags 32. . . . . . . . . . . . . . . . . . . . . .
Figure 25: Sync Error Reporting in the Absence of a DAR 32. .
Figure 26: A short session report 34. . . . . . . . . . . . . . . . . . . . . .
Figure 27: Additional data on the long report 35. . . . . . . . . . . . .
Figure 28: The Channel Status view, text mode 37. . . . . . . . . . .
Figure 29: The Channel Status view, binary mode 38. . . . . . . . .
Figure 30: The User Data view, text mode 39. . . . . . . . . . . . . . .
Figure 31: The Restore Setups submenu 41. . . . . . . . . . . . . . . . .
Figure 32: An “in-bar” warning message 45. . . . . . . . . . . . . . . .
Figure 33: The “interpolation OFF” message 50. . . . . . . . . . . . .
Figure 34: The De-emphasis flags 54. . . . . . . . . . . . . . . . . . . . .
Figure 35: Connecting to a DTE device with a DB25
serial port 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 36: Connecting to a DCE device with a DB25
serial port 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 37: The Audio view with digital video input selected 91.
Figure 38: Option 02 connectors 93. . . . . . . . . . . . . . . . . . . . . . .
Figure 39: Standard balanced-output pin assignments 97. . . . . .
Figure 40: Connecting to an unbalanced input 98. . . . . . . . . . . .
List of Tables
Table 1: Correlation meter speed averaging intervals 47. . . . . .
Table 2: Level Meters submenu 49. . . . . . . . . . . . . . . . . . . . . . .
iv
Table 3: De-emphasis submenu 53. . . . . . . . . . . . . . . . . . . . . .
Table 4: Phase Display submenu 54. . . . . . . . . . . . . . . . . . . . . .
Table 5: Headphones submenu 56. . . . . . . . . . . . . . . . . . . . . . .
Table 6: Input submenu items (standard instrument) 56. . . . . .
Table 7: Option 01 input submenu, audio inputs selected 57. . .
764 Digital Audio Monitor User Manual
Table 8: Option 01 input submenu, video inputs selected 57. . .
Table 9: Time Code submenu 57. . . . . . . . . . . . . . . . . . . . . . . .
Table 10: Serial Port submenu items 58. . . . . . . . . . . . . . . . . . .
Table 11: Save Setups submenu 59. . . . . . . . . . . . . . . . . . . . . .
Table 12: Restore Setups submenu 60. . . . . . . . . . . . . . . . . . . .
Table 13: Screen Saver submenu 60. . . . . . . . . . . . . . . . . . . . .
Table 14: Service submenu 61. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 15: RS-232 pin assignments 62. . . . . . . . . . . . . . . . . . . . .
Table 16: General remote control commands 67. . . . . . . . . . . .
Table 17: Remote control GET commands 68. . . . . . . . . . . . . .
Table 18: Remote control PRESS commands 70. . . . . . . . . . . .
Table 19: Remote control MENU commands 71. . . . . . . . . . . .
Contents
Table 20: Digital audio inputs 75. . . . . . . . . . . . . . . . . . . . . . . .
Table 21: Level Meters and Phase Display 76. . . . . . . . . . . . . .
Table 22: SMPTE Time Code inputs 76. . . . . . . . . . . . . . . . . . .
Table 23: Interface parameter measurements 76. . . . . . . . . . . . .
Table 24: Headphone output 77. . . . . . . . . . . . . . . . . . . . . . . . .
Table 25: VGA output 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 26: Physical characteristics 78. . . . . . . . . . . . . . . . . . . . .
Table 27: Power requirements 79. . . . . . . . . . . . . . . . . . . . . . . .
Table 28: Environmental characteristics 79. . . . . . . . . . . . . . . .
Table 29: Certifications and compliances 80. . . . . . . . . . . . . . .
Table 30: Option 01 characteristics 89. . . . . . . . . . . . . . . . . . . .
Table 31: Option 02 characteristics 94. . . . . . . . . . . . . . . . . . . .
Table 32: Output configuration jumper locations 95. . . . . . . . .
Table 33: Power cord identification 99. . . . . . . . . . . . . . . . . . . .
764 Digital Audio Monitor User Manual
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Table of Contents
vi
764 Digital Audio Monitor 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
Use Proper Power Cord
Use only the power cord set provided with this product, or some
other properly rated and approved cord set configured for the local
mains supply outlets.
Use Proper Power Source
This product is designed to operate from a power source that will
apply no more than 250 V
between either supply conductor and ground.
between the supply conductors, or
RMS
Ground the Product
Before connecting the product’s input or output terminals, plug the
power cord into a properly wired receptacle. A protective ground
connection, through the grounding conductor in the power cord, is
essential for safe operation.
Use Proper Fuse
Use only the fuse type and rating specified for this product.
Operate Only Within a Suitable Enclosure
Operate this product only within an enclosure that prevents contact
with interior electrical components.
Provide Proper V entilation
Refer to the manual’s installation instructions for details on installing
the product so that it has adequate cooling ventilation.
764 Digital Audio Monitor User Manual
vii
General Safety Summary
Use in a Proper Environment
Do not operate this product in wet/damp locations/conditions or in
explosive atmospheres.
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.
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.
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764 Digital Audio Monitor User Manual
General Safety Summary
Symbols on the Product
The following symbols may appear on the product:
DANGER
High Voltage
Protective Ground
(Earth) Terminal
ATTENTION
Refer to
Manual
Double
Insulated
764 Digital Audio Monitor User Manual
ix
General Safety Summary
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764 Digital Audio Monitor User Manual
Preface
The Tektronix 764 Digital Audio Monitor shown in Figure 1 is a tool
for monitoring the signal levels and stereo phase of digitally-encoded
(AES/EBU and IEC 958 “consumer use”) audio in a production
environment. The instrument can simultaneously display the levels
of two two-channel inputs, and the stereo phase relationship of any
two of the four input channels. It can also display numerical data
about the audio program material as well as “Channel Status” and
“User Data” information encoded in the digital audio signal.
Figure 1: The Tektronix 764 Digital Audio Monitor
Through on-screen menus and front-panel controls, the user may
configure the response dynamics (ballistics), reference levels, offset,
and scale of the meters to suit the monitoring needs of the particular
installation or situation. The user may also choose among several
types of stereo phase display.
This Manual
This User Manual is divided into the following sections:
H Getting Started — All the information you’ll need to put your
new instrument in service. Begins on page 13.
764 Digital Audio Monitor User Manual
xi
Preface
H Operating Basics — What you’ll need to know for day-to-day
operation of the 764. Begins on page 13.
H Reference — Begins on page 43.
H Appendices — Instrument characteristics; Options/Accessories;
User Service. Begin on page 75.
H Glossary — Begins on page 101.
H Index — Begins on page 103.
Contacting Tektronix
Phone 1-800-833-9200* Address Tektronix, Inc.
Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
Web site www.tektronix.com Sales
support
Service
support
Technical
support
1-800-833-9200, select option 1*
1-800-833-9200, select option 2*
Email: techsupport@tektronix.com
1-800-833-9200, select option 3*
1-503-627-2400
6:00 a.m. – 5:00 p.m. Pacific time
xii
* This phone number is toll free in North America. After office
hours, please leave a voice mail message.
Outside North America, contact a T ektronix sales office or
distributor; see the Tektronix web site for a list of offices.
764 Digital Audio Monitor User Manual
Getting Started
This section contains information you’ll need to put your 764 Digital
Audio Monitor into service. For a detailed description of instrument
capabilities, and instructions for its use, refer to the Operating Basics
section of this manual.
Unpacking
Please save the packaging material in case you must later ship the
instrument for calibration or service.
The following accessory items are included with the 764 Digital
Audio Monitor:
H This user manual
H A power cord
Any cabinet ordered with the instrument is shipped in a separate
carton.
Mechanical Installation
To accommodate the installation needs of users worldwide, Tektronix
provides the 764 without an enclosure (cabinet). To ensure proper
cooling, electromagnetic shielding, and protection against accidental
electrical shock, install the instrument in the Tektronix enclosure that
best suits your application.
NOTE. The Tektronix 764 meets EMI/EMC standards when shielded
interconnect cables are used, and when installed in one of the
following Tektronix enclosures:
H 1700F00, Plain cabinet for 1/2 rack width
H 1700F02, Portable cabinet including feet and handle
H 1700F05, Dual side-by-side rackmount adapter
764 Digital Audio Monitor User Manual
1
Getting Started
Order the appropriate enclosure through your nearest Tektronix field
office or representative.
WARNING. Do not carry an instrument in one of the optional
enclosur es without first installing the cabinet mounting screws as
shown in Figure 2. Without the mounting screws, an instrument can
slip out of its cabinet if tipped forward. Property damage or injury
may result.
Figure 2: Rear view of the 764 in a Tektronix enclosure
Connecting the 764 to Your System
Except for the headphone jack, all connectors are on the rear panel of
the 764, shown in Figure 3. The connections you make will depend on
your particular installation and operating environment. See the
following paragraphs for explanations of the connectors and their
functions.
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764 Digital Audio Monitor User Manual
Getting Started
Figure 3: The 764 rear panel and connectors
(1) Digital Audio Inputs and Loop-Throughs
The 764 has two, two-channel digital audio inputs, one labeled
CH 1–2, and the other labeled CH 3–4. Each input in the standard
instrument has two passive loop-throughs that allow you to switch the
instrument off with no effect on the through signal:
H Balanced XLR connectors for signals conforming to the AES/EBU
(AES3-1992) standard. Set the TERM switches immediately below
these connectors to EXT when the 764 is installed in-line; select
110 Ω (internal termination) when the instrument is at the end of
the signal path.
764 Digital Audio Monitor User Manual
3
Getting Started
NOTE. The male XLR connectors of instruments equipped with
Option 02 (Analog Line Output) are labeled ANALOG OUT; these
instruments do not have pr ovision for loop-through on the balanced
XLR connectors.
The balanced XLR inputs of Option 02 instruments are unterminated
when the associated TERM switches are set to EXT. T o avoid signal
degradation, always leave the TERM switches of Option 02 instruments set to 110 Ω.
Refer to Appendix C: Options for more information about Option 02.
H 75 Ω BNC connectors that accept unbalanced, digital audio signals
in both professional (AES/EBU) and consumer (IEC958) formats.
These inputs have no provision for internal termination; if the 764
is placed at the end of a signal path, install a 75 Ω end-line
termination (Tektronix part number 011-0102-00) on the unused
loop-through connector .
An RCA phono plug-to-BNC male cable or adapter may be
required to input consumer digital audio. Plug is available in North
America through Markertek Video Supply,
telephone: 800-522-2025.
Figure 4: Connecting the standard 764 to your system
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764 Digital Audio Monitor User Manual
Getting Started
NOTE. The balanced (XLR) loop-throughs are the default 764 inputs.
To receive a signal thr ough the unbalanced (BNC) loop-throughs or
the optional serial video loop-through (Option 01), you must first
reconfigure the instrument through the on-scr een menus. Refer to
Initial Power Up and Configuration on page 9 for instructions.
(2) Time Code Inputs
VITC — Reads vertical interval time code from NTSC or PAL analog
video per IEC publication 461 specifications. The time code can be
shown on the SESSION display, and stamped on each error on a
printed Session Report. The format of the Session View time display is
Hours:Minutes:Seconds.
LTC — Reads linear time code that also conforms to IEC specifications. The time code can be shown on the Session display, and
stamped on each error on a printed Session Report. The format of the
time display is Hours:Minutes:Seconds:Frames.
(3) Reference Inputs
Connect your “house” digital audio reference (DAR) signal to one of
the REF IN connectors. These connectors (one BNC, one XLR) accept
the same formats as the Digital Audio Inputs. They are internally
terminated. As with the audio inputs, the default connector is XLR;
use the on-screen menus to select the BNC connector . The 764 can use
any AES signal as a DAR; it will use the reference input to detect and
measure frame synchronization of AES signals.
If you do not connect a house DAR to one of the reference inputs, the
764 will monitor synchronization of the CH 3–4 input signal with the
CH 1–2 input signal. For more information, refer to the explanation of
the Frame Synchronization Error session statistic on page 32.
(4) VGA Video Output
To see a larger, color image of the 764 display (as illustrated in
Figure 5), connect a VGA-compatible monitor to this standard 15-pin
output. Table 25 on page 77 lists the characteristics of the Video
Output signal.
764 Digital Audio Monitor User Manual
5
Getting Started
VGA or SVGA
Monitor
Tektronix 764 Monitor
From VGA VIDEO Output
Figure 5: Using an external color monitor
(5) RS-232 Communications Port
Through the RS-232 port, you can:
H Output a record of the input signal and program, either to an
ASCII printer or a personal computer (see Figure 6) running a
communications application, such as PROCOMM or the Terminal
accessory of Microsoft Windows. Refer to Session Reports
beginning on page 34.
H Operate the instrument (serial number B020000 and later) by
remote control. Refer to Remote Control Commands, beginning on
page 66, for more information.
H Download future 764 software upgrades through a personal
computer. Please contact your Tektronix representative, or the
nearest Tektronix office, for information about software upgrades.
Installation instructions are provided with each upgrade kit.
6
764 Digital Audio Monitor User Manual
Tektronix 764 Monitor
Printer
Getting Started
Via RS-232
Print or Store
Computer
Figure 6: Outputting a session report
(6) Optional Serial Video Loop-Through
Instruments equipped with Option 01 (Embedded Audio Input) have
two additional 75 Ω BNC connectors, SER. VIDEO IN and SER.
VIDEO OUT. These connectors make up a loop-through that accepts
digital video with embedded digital audio.
Refer to Appendix C: Options, beginning on page 89, for more
information about Option 01.
Headphones
The front-panel headphone output lets you listen to the audio
programs contained in the digital input signals. The connector accepts
1
ń
a standard
Figure 7. Adjust the output level with the
inch (6.35 mm) stereo plug and is wired as shown in
4
VOLUME knob.
764 Digital Audio Monitor User Manual
7
Getting Started
Figure 7: The headphone output (schematic)
By factory default, the headphone output automatically follows the
phase display; that is, it contains the audio programs decoded from the
two channels that you are monitoring with the Lissajous pattern and
correlation meter. You may also choose to listen to any two of the
input channels, independent of the phase display choices; for
instructions, refer to Selecting Headphone Channels on page 48.
Supplying Power
You can operate the 764 on any AC power supply that provides 90 to
250 V at 50 to 60 Hz. If the power cord supplied with your instrument
is incorrect for your local AC supply, please contact your nearest
Tektronix representative or field office.
WARNING. Line voltage will be present in the instrument whenever
power is supplied even if the POWER switch is set to STANDBY
Always disconnect the power cord before removing the instrument
from its cabinet.
.
8
764 Digital Audio Monitor User Manual
Initial Power Up and Configuration
Once you have connected a signal source to at least one of the 764
DIGITAL AUDIO inputs, switch the instrument On. When the start-up
diagnostics are completed, the instrument will begin operation in the
Audio View/Session display.
If a signal source is connected through one of the XLR inputs, the
program level should be shown in the corresponding meters. If the
input is through a BNC connector, you must reconfigure the input with
the following procedure before you can monitor the signal. In either
case, please take this opportunity to familiarize yourself with the 764
front panel controls (Figure 8), menu structure, and techniques.
Getting Started
Figure 8: Controls for initial power up and configuration
764 Digital Audio Monitor User Manual
9
Getting Started
Perform the following steps to select the input types and familiarize
yourself with the 764 menu structure:
1. Press the
2. When the 764 is in menu mode,
context-sensitive HELP messages. Press
MENU button to enter the TOP MENU.
MENU provides access to
MENU now to see the TOP
MENU help message; the display resembles Figure 9. Press the
button again to clear the message.
10
Figure 9: The top menu HELP message
3. The knob icon appears in the upper-right corner of the display
when the multi-function knob is active. Here, you may turn the
knob to scroll among the TOP MENU choices. Turn the knob now
to scroll the menu highlight to the “Inputs” entry, as shown in
Figure 10.
764 Digital Audio Monitor User Manual
Getting Started
Figure 10: Selecting from the top menu
4. The five buttons immediately to the right of the display are called
soft buttons. The printed/molded lines to the left of these buttons
serve to associate the buttons with on-screen menu choices or
functions. In Figure 10, the bottom soft button is associated with
the SUBMENU function, but you can press any soft button to enter
the Inputs submenu.
1
After you do, the display resembles Figure
11.
5. To change the channel 1–2 input to the BNC connector, press the
soft button to the right of the “BNC-unbalanced” choice. The
change is in effect when you exit the menu and return to normal
operation.
1
Because there are no other soft button assignments in the top menu level,
the 764 is configured so that pressing any one of the five soft buttons will
select the highlighted submenu.
764 Digital Audio Monitor User Manual
11
Getting Started
Figure 11: The inputs submenu
6. Turn the multi-function knob to move the menu highlight to the
“CH 3–4 input:” line.
7. If desired, change the channel 3–4 input to the BNC connector by
pressing the associated soft button.
8. Press the
CLEAR MENU button to exit the menus and resume normal
operation. If you have selected the appropriate input type, the
corresponding level meters should now respond to the input audio
program.
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764 Digital Audio Monitor User Manual
Operating Basics
This section contains the basic information needed to use your 764.
The subsections are: Overview, Front Panel Controls, The Level
Meters, The Phase Display, The Session Display, Session Reports,
The Channel Status View, The User Data View, and Other Features.
Please take a few minutes to familiarize yourself with this section
and the information contained in it. Consult the text whenever you
have a question regarding instrument operation. Because the
Tektronix 764 Digital Audio Monitor is intended as a tool for use in
a production environment, every effort has been made to keep
operation as simple and intuitive as possible. An attempt has also
been made to keep this section of the manual brief and easy to use.
You will find detailed information about the more technical aspects
of 764 operation in the Reference section of this manual.
Overview
The 764 permits in-line monitoring of the audio program contained
in a digital audio signal without first converting it to analog form. In
addition, it can report and interpret the ancillary data that is
transmitted through the Channel Status and User Data bits of the
digital data stream.
The 764 uses three display views to perform those functions—the
Audio view, the Channel Status view, and the User Data view—as
described in the following paragraphs. (To locate buttons mentioned
in the text, refer to Front Panel Controls beginning on page 16.)
Monitoring an Audio Program with the Audio View
The Audio view (with the Session Statistics displayed, as shown in
Figure 12) is the power-up default configuration of the 764.
Otherwise, the Audio View is never more than two button presses
away:
1. Press the CLEAR MENU button to exit any on-screen menu.
2. Press the VIEW:AUDIO button.
764 Digital Audio Monitor User Manual
13
Operating Basics
The left portion of the Audio view display always contains four “bar
graph” level meters. The right portion contains either a numerical
display of session statistics (see Figure 12), or the Phase display
(shown in Figure 13). Configure the right side of the Audio view
display with the three PHASE DISPLAY buttons: A, B, and
SESSION.
14
Figure 12: The 764 AUDIO/SESSION view
The 764 has many options that affect the appearance and behavior of
the Audio view features. For more information, refer to The Level
Meters beginning on page 18; Sum and Difference Bars on page 25;
The Phase Display on page 26; and The Session Display on page 29.
Session Reports
The 764 can also output session reports, which are permanent records
of session activity, through the rear-panel RS-232 port. The reports
can either be sent directly to a printer, or captured on a PC and saved
to disk.
This feature adds important utility to the 764 because it permits
screening of digital audio programs for errors and peak levels
764 Digital Audio Monitor User Manual
Operating Basics
without requiring constant operator attention. When errors and peaks
are encountered, they are time-stamped with the active session time
code, which makes it easy to return to the part of the program that
contains the event of interest. See page 34 for more information.
Figure 13: The 764 AUDIO/PHASE view
Monitoring the Ancillary Data
You can monitor ancillary data contained in the digital audio signal
through two additional 764 view options.
Channel Status View. The Channel Status view reports the information
embedded in the channel status bytes of the incoming serial digital
signal. Select the Channel Status view by pressing CLEAR MENU
(if necessary, to exit the on-screen menus), then the VIEW:CH.
STATUS button. You may select a number of Channel Status view
options with the Soft buttons to the right of the display. Refer to The
Channel Status View beginning on page 37 for more information.
User Data View. The User Data view reports the information embedded
in the User bytes of the incoming signal. Select the User data view
by pressing CLEAR MENU (if necessary, to exit the on-screen
764 Digital Audio Monitor User Manual
15
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