Tektronix 070-8811-08 - Manuals

Table of Contents iv 764 Digital Audio Monitor User Manual 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 SYN...

764 Digital Audio Monitor User Manual vii General Safety Summary Review the following safety precautions to avoid injury and preventdamage to this product or any products connected to it. To avoidpotential hazards, use this product only as specified. Only qualified personnel should perform service p...

General Safety Summary viii 764 Digital Audio Monitor User Manual Use in a Proper Environment Do not operate this product in wet/damp locations/conditions or inexplosive atmospheres. Observe All Terminal Ratings To avoid fire or shock hazard, observe all ratings and markings onthe product. Consult t...

General Safety Summary 764 Digital Audio Monitor User Manual ix 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 xi Preface The Tektronix 764 Digital Audio Monitor shown in Figure 1 is a toolfor monitoring the signal levels and stereo phase of digitally-encoded(AES/EBU and IEC 958 “consumer use”) audio in a productionenvironment. The instrument can simultaneously display t...

Preface xii 764 Digital Audio Monitor User Manual H Operating Basics — What you’ll need to know for day-to-dayoperation 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 o...

764 Digital Audio Monitor User Manual 1 Getting Started This section contains information you’ll need to put your 764 DigitalAudio Monitor into service. For a detailed description of instrumentcapabilities, and instructions for its use, refer to the Operating Basicssection of this manual. Unpacking ...

Getting Started 2 764 Digital Audio Monitor User Manual Order the appropriate enclosure through your nearest Tektronix fieldoffice or representative. WARNING. Do not carry an instrument in one of the optional enclosures without first installing the cabinet mounting screws asshown in Figure 2. Withou...

Getting Started 764 Digital Audio Monitor User Manual 3 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 labeledCH 1–2, and the other labeled CH 3–4. Each input in the standardinstrument has two passive loop...

Getting Started 4 764 Digital Audio Monitor User Manual NOTE . The male XLR connectors of instruments equipped with Option 02 (Analog Line Output) are labeled ANALOG OUT; theseinstruments do not have provision for loop-through on the balancedXLR connectors. The balanced XLR inputs of Option 02 instr...

Getting Started 6 764 Digital Audio Monitor User Manual 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 anASCII prin...

Getting Started 764 Digital Audio Monitor User Manual 7 Tektronix 764 Monitor Printer Computer Via RS-232 Print or Store Figure 6: Outputting a session report (6) Optional Serial Video Loop-Through Instruments equipped with Option 01 (Embedded Audio Input) havetwo additional 75 Ω BNC connectors, SER...

Getting Started 8 764 Digital Audio Monitor User Manual Figure 7: The headphone output (schematic) By factory default, the headphone output automatically follows thephase display; that is, it contains the audio programs decoded from thetwo channels that you are monitoring with the Lissajous pattern ...

Getting Started 764 Digital Audio Monitor User Manual 9 Initial Power Up and Configuration Once you have connected a signal source to at least one of the 764DIGITAL AUDIO inputs, switch the instrument On. When the start-updiagnostics are completed, the instrument will begin operation in theAudio Vie...

Getting Started 10 764 Digital Audio Monitor User Manual Perform the following steps to select the input types and familiarizeyourself with the 764 menu structure: 1. Press the MENU button to enter the TOP MENU. 2. When the 764 is in menu mode, MENU provides access to context-sensitive HELP messages...

Getting Started 764 Digital Audio Monitor User Manual 11 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 buttonsserve to associate the buttons with on-screen menu choices orfunct...

Getting Started 12 764 Digital Audio Monitor User Manual 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 M...

764 Digital Audio Monitor User Manual 13 Operating Basics This section contains the basic information needed to use your 764.The subsections are: Overview, Front Panel Controls, The LevelMeters, The Phase Display, The Session Display, Session Reports,The Channel Status View, The User Data View, and ...

Operating Basics 14 764 Digital Audio Monitor User Manual The left portion of the Audio view display always contains four “bargraph” level meters. The right portion contains either a numericaldisplay of session statistics (see Figure 12), or the Phase display(shown in Figure 13). Configure the right...

Operating Basics 764 Digital Audio Monitor User Manual 15 without requiring constant operator attention. When errors and peaksare encountered, they are time-stamped with the active session timecode, which makes it easy to return to the part of the program thatcontains the event of interest. See page...

Operating Basics 16 764 Digital Audio Monitor User Manual menus), then the VIEW:USER DATA button. You may select anumber of User Data view options with the Soft buttons. Refer toThe User Data View beginning on page 39 for more information. Other Features With the 764, you can also save up to three i...

Operating Basics 18 764 Digital Audio Monitor User Manual LED immediately above the knob will light and a knob icon willappear in the upper-right of the display when the knob is active. (6) MENU button. Press MENU to invoke the display menu and call up context-sensitive help text when a menu is on s...

Operating Basics 20 764 Digital Audio Monitor User Manual Figure 16: The sum and difference display modes (3) Peak Program level. The Peak Program level is usually the maxi- mum permissible level for audio program material. The defaultPeak Program level is –8 dBFS; you may set it to the integer val-...

Operating Basics 22 764 Digital Audio Monitor User Manual Please be aware that although the peak indicators may revealhigher peaks than VU or PPM ballistics, the indicators do act onthe same, processed data as the meters. If interpolation is ON, thepeak indicators show peaks in the oversampled data,...

Operating Basics 764 Digital Audio Monitor User Manual 23 Press METER SCALE:NORMAL to restore the default meterscale; to later restore the “custom” scale and offset, press METERSCALE:CUSTOM. Figure 17: Creating a custom meter scale Level Meter Submenu selections. All remaining level meter configura-...

Operating Basics 24 764 Digital Audio Monitor User Manual Figure 18: The Level Meters submenu 5. Again, use the multi-function knob to scroll the menu highlight to the parameter you wish to configure. The soft button assignmentswill change to reflect your choice of settings. For menu items thathave ...

Operating Basics 764 Digital Audio Monitor User Manual 25 the button down — or until you reach an adjustment limit.)Changes are confirmed by changed text after the parameter namein the submenu column on the left side of the screen. 7. Repeat steps (5) and (6) until you have configured the meters to ...

Operating Basics 26 764 Digital Audio Monitor User Manual Figure 20: Sum and difference bars and the session display The Phase Display The 764 Phase display is a Lissajous pattern display augmented witha (phase) Correlation meter. It is designed for convenient, qualitativemonitoring of the phase rel...

Operating Basics 764 Digital Audio Monitor User Manual 27 Figure 21: The 764 phase display The Lissajous Pattern The Lissajous portion of the phase display is a plot of one channelagainst another on an orthogonal pair of axes. The X–Y orienta-tion — shown on the right in Figure 21 — plots left chann...

Operating Basics 28 764 Digital Audio Monitor User Manual +1 when the channels contain identical signals (frequency andphase); it will measure –1 when the signals have the same frequency(or frequencies), but are 180 degrees out of phase. A center-scale (0)reading indicates uncorrelated — or random —...

Operating Basics 764 Digital Audio Monitor User Manual 29 The Session Display The session display is a dynamic readout of session history; it isillustrated in Figure 23. When the 764 is in Audio view, press thePHASE DISPLAY : SESSION button to toggle between the Phase display and the Session display...

Operating Basics 30 764 Digital Audio Monitor User Manual Session time. The instrument time-stamps any errors encounteredduring the Session with the chosen time code; the information issaved in NVRAM for use when you output a Session report (referto page 34). (2) Run(ning)/Stop(ped) indicator and so...

Operating Basics 32 764 Digital Audio Monitor User Manual SYNC ERR flags as shown in Figure 24. Please see the followingparagraphs for more information. Figure 24: The SYNC ERR Flags H Frame Synchronization Error — for each input with respect to theDigital Audio Reference (DAR), when one is present ...

Operating Basics 34 764 Digital Audio Monitor User Manual Session Reports The 764 can output the data collected during a session — in the formof ASCII text session Reports, through the rear-panel RS-232connector. You can print reports on a serial printer, or save them tofiles on an IBM-compatible Pe...

Operating Basics 764 Digital Audio Monitor User Manual 35 The short report, shown in Figure 26, is a record of what happenedduring the session. It contains a print-out of the statistics tabulated onthe 764 Session display, and lists several instrument settings that canaffect meter behavior. In addit...

Operating Basics 36 764 Digital Audio Monitor User Manual There are two types of time-stamped information, peak readings anderror events. Peak readings are the highest true peak and the highestmeter reading encountered during each consecutive peak readinginterval in the session. An error event is a ...

Operating Basics 764 Digital Audio Monitor User Manual 37 The Channel Status View The 764 Channel Status view displays the channel status informationthat is embedded in AES3-1992 (professional) or IEC-958 (consum-er) digital audio signals. Press CLEAR MENU (if necessary to exit amenu), then the VIEW...

Operating Basics 38 764 Digital Audio Monitor User Manual H In binary display mode (illustrated in Figure 29), you may turnthe multi-function knob to highlight various bits or blocks of bitsfor same-screen “plain English” decoding. For example, bits 3through 5 of byte 0 indicate the (pre)emphasis, i...

Operating Basics 764 Digital Audio Monitor User Manual 39 The User Data View The 764 User Data view is intended to display optional userinformation that may be embedded in the “user bits” of digital audiosignals. As this is written, the 764 can only interpret and display datathat is block-aligned wi...

Operating Basics 40 764 Digital Audio Monitor User Manual Saving and Restoring Setups The 764 automatically stores current front panel and menu settings innon-volatile RAM. The instrument restarts every time in the AudioView/Session Display, with the session stopped and session time (if itis the cur...

Operating Basics 764 Digital Audio Monitor User Manual 41 been restored” — will appear on screen to signal that theoperation is complete. 4. Press CLEAR MENU to resume normal instrument operation with the newly-recalled settings. Figure 31: The Restore Setups submenu Editing a Setup To edit an exist...

764 Digital Audio Monitor User Manual 43 Reference This section contains detailed information about the more technicalaspects of 764 operation. The subsections are: Level Meters,Correlation Meter Algorithm, Selecting Headphone Channels,Submenus, and Using the RS-232 Port. Level Meters Also refer to ...

Reference 44 764 Digital Audio Monitor User Manual always indicated by the peak segment, so actual headroom is alwaysvisible. With VU ballistics, the Test Level should correspond to the samelevel as above (–18 dBFS) if program exchange is important. Inaccordance with standard practice, the Test Leve...

Reference 46 764 Digital Audio Monitor User Manual V BIT — Indicates that the Validity bit is set high for one or more data samples. In the AES/EBU standard, a set validity bit indicates thatthe sample is not suitable for conversion to audio. By default, Themeter bars and phase display treat the aff...

Reference 764 Digital Audio Monitor User Manual 47 and (sign) + ( ) 1) if 4fs ń 60 ȍ n + 0 (L n R n ) is u 0 or (sign) + (–1 ) if 4fs ń 60 ȍ n + 0 (L n R n ) is t 0 The actual correlation meter reading is the “rolling average” of thelast i sample blocks: M + C 1 ) C 2 ) , . . . , ) C i i where i is ...

Reference 48 764 Digital Audio Monitor User Manual Selecting Headphone Channels By factory default, the headphone output follows the phase display.That is, you can listen to the audio programs that are currentlydriving the Lissajous pattern and Correlation meter (refer to ThePhase Display beginning ...

Reference 764 Digital Audio Monitor User Manual 49 Table 2: Level Meters submenu Item Choices Factory setting ÁÁÁÁÁÁÁ Á ÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Display Mode ÁÁÁÁÁÁÁ Á ÁÁÁÁÁ Á ÁÁÁÁÁÁÁ 4 ChannelsCh 1–2 and Sum & DiffCh 3–4 and Sum & Diff ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ 4 Channels ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ Interpol...

Reference 50 764 Digital Audio Monitor User Manual or channels 3–4); the right-hand bars show (L+R)/2 (Sum) and(L–R)/2 (Diff) data derived from the two left-hand bars. The Sumand Difference bars use the same scale and ballistics, and all othersettings, as the channel level meters. Interpolation. Whe...

Reference 764 Digital Audio Monitor User Manual 53 The De-emphasis Submenu The De-emphasis submenu, shown in Table 3, lets you select theappropriate de-emphasis for each of the four input channels. Enterthe De-emphasis submenu from the TOP menu level by scrolling thehighlight to the De-emphasis item...

Reference 54 764 Digital Audio Monitor User Manual Figure 34: The De-emphasis flags The Phase Display Submenu Use the Phase Displaly submenu (Table 4) to configure the appear-ance and behavior of the Audio View Phase display. Table 4: Phase Display submenu Item Choices Factory setting ÁÁÁÁÁÁÁ Á ÁÁÁÁ...

Reference 764 Digital Audio Monitor User Manual 55 display orientation. Refer to page 26 for details on the phase displayformats. Correlation Meter Speed. The Correlation Meter Speed setting determines how quickly the meter reacts to changes in phaserelationship. The meter reading is actually an ave...

Reference 56 764 Digital Audio Monitor User Manual Headphones Submenu Use the Headphonse submenu (Table 5) to determine the inputchannels to be decoded and output through the headphone jack. Table 5: Headphones submenu Item Choices Factory setting ÁÁÁÁÁÁÁ Á ÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Audio Source ÁÁÁÁÁÁÁ Á ÁÁÁ...

Reference 764 Digital Audio Monitor User Manual 57 Table 7: Option 01 input submenu, audio inputs selected Item Choices Factory setting ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ Audio Source ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ Digital Audio InputsDigital Video Input ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Digital Audio Inputs ÁÁÁÁÁÁÁ Á ÁÁÁÁÁ Á ÁÁÁÁÁÁÁ CH 1–2 input Á...

Reference 58 764 Digital Audio Monitor User Manual Serial Port Submenu The Serial Port submenu contains items used for setting the serialport parameters and controlling the content of the session report. Theitems and choices are listed in Table 10 and explained in thesubsequent paragraphs. Table 10:...

Reference 764 Digital Audio Monitor User Manual 59 Peak Reading Interval (sec). Use this item to choose the duration of the peak reading intervals. When a session is running, the 764 stores thetime and value of the highest true peak and meter bar readingsencountered during each interval. The time-st...

Reference 60 764 Digital Audio Monitor User Manual Restore Setups Submenu Restore a previously saved instrument configuration through theRestore Setups submenu (Table 12). The current instrument settingswill be replaced by those in the saved Setup. Table 12: Restore Setups submenu Item Choices Facto...

Reference 764 Digital Audio Monitor User Manual 61 Service Submenu Use the Service submenu (Table 14) to select patterns for use inadjusting the display; find the version of software installed in theinstrument and the instrument’s firmware identification number; andsuperimpose a numeric readout of s...

Reference 62 764 Digital Audio Monitor User Manual Using the RS-232 Port The primary use of the 764 RS-232 port is to output session reports.The reports can be sent directly to any ASCII printer with serialinput, or captured on a PC and saved to disk. The RS-232 port also supports remote control of ...

Reference 764 Digital Audio Monitor User Manual 63 NOTE . RS-232 signals are named from the perspective of the DTE device. Since the 764 is a DCE device, pin 2 (Received Data) is anoutput from the instrument; that is, the data is received by theconnected DTE device. The 764 supports both hardware (R...

Reference 64 764 Digital Audio Monitor User Manual Figure 36: Connecting to a DCE device with a DB25 serial port NOTE . Most Personal Computers are DTE devices; however, printers may be either DTE or DCE, and the type may not be obvious fromthe printer documentation or the gender of the RS-232 conne...

Reference 764 Digital Audio Monitor User Manual 65 H Printer Communications Settings: ESP (automatic protocol sensing)9600 (baud)8 (bits)1 (stop bit)DTR/DSR (flow control) H 764 Serial Port settings: Flow Control = HARDWAREBaud Rate = 9600 Communicating with a PC. You can use the software and settin...

Reference 764 Digital Audio Monitor User Manual 67 The example command gets the time, gets the sample rate from theChannel 3 – Channel 4 input, and presses the View Audio button.When you abbreviate a command, you cannot leave out letters in themiddle of a command argument. If the complete argument i...

Reference 68 764 Digital Audio Monitor User Manual Table 16: General remote control commands (Cont.) Command Effect MSGON:<text> Displays a temporary message up to 58 charac-ters on the top line of the 764 display. Excess textdoes not wrap; it is truncated. MSGOFF Removes the temporary message...

Reference 70 764 Digital Audio Monitor User Manual PRESS Commands. Each front-panel button (except the power switch) has an equivalent PRESS:<button> command. Send the command toperform the same action as pressing the button. Table 18: Remote control PRESS commands Command Equivalent button PR...

Reference 764 Digital Audio Monitor User Manual 71 MENU Commands. Use the MENU commands listed in Table 19 to make selections from the 764 on-screen menus. The menus need notbe visible on the display to change a setting with a MENU command. SYNTAX: MENU:mnemonic:<number> (unrecognized number r...

Reference 72 764 Digital Audio Monitor User Manual Table 19: Remote control MENU commands (Cont.) Command Submenu, item Value = setting ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ MENU:SYNCF:<0–1> ÁÁÁÁÁÁÁ Á ÁÁÁÁÁ Á ÁÁÁÁÁÁÁ 0=NO1=YES ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Level Meters, Suppress Sync Loss Flags ÁÁÁÁÁ...

Reference 764 Digital Audio Monitor User Manual 73 Table 19: Remote control MENU commands (Cont.) Command Submenu, item Value = setting ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ MENU:PBRIGHT:<0–3> ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ 0=channel #11=channel #22=channel #33=channel #4 ÁÁÁÁÁÁÁÁÁ ...

Reference 74 764 Digital Audio Monitor User Manual Table 19: Remote control MENU commands (Cont.) Command Submenu, item Value = setting ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ MENU:BAUD:<0–3> ÁÁÁÁÁÁÁ Á ÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ 0=384001=192002=96003=2400 ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ...

764 Digital Audio Monitor User Manual 75 Appendix A: Specifications ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Table 20: Digital audio inputs ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Characteristic ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Performance require-ments ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Supplemental informati...

Appendix A: Specifications 76 764 Digital Audio Monitor User Manual ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Table 21: Level Meters and Phase Display ÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁ Characteristic ÁÁÁÁÁÁÁ Á ÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Performance require-ments ÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁ Supplemental info...

Appendix A: Specifications 764 Digital Audio Monitor User Manual 77 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Table 23: Interface parameter measurements (Cont.) ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Supplemental information ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Performance require-ments ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ...

Appendix A: Specifications 78 764 Digital Audio Monitor User Manual Table 25: VGA output (Cont.) Characteristic Information Load Impedance RedGreenBlueHorizontal SyncVertical Sync 75 ohms75 ohms75 ohmsTTL compatibleTTL compatible Timing/Frequency Dot ClockHorizontal RateVertical Rate 25.175 MHz31.46...

Appendix A: Specifications 764 Digital Audio Monitor User Manual 79 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Table 26: Physical characteristics (Cont.) ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Information ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Characteristic ÁÁÁÁÁÁÁÁ Depth ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 17 i...

Appendix A: Specifications 80 764 Digital Audio Monitor User Manual Table 28: Environmental characteristics (Cont.) Characteristic Information ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Transportation ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Meets the requirements of NTSB Test Procedure 1A, category II (24 inch drop) ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ...

Appendix A: Specifications 764 Digital Audio Monitor User Manual 81 Table 29: Certifications and compliances (Cont.) Australia/NewZealand Declarationof Conformity –EMC Complies with EMC provision of Radiocommunications Act perthe following standard(s): AN/NZS 2064.1/2 Industrial, Scientific, and Med...

764 Digital Audio Monitor User Manual 83 Appendix B: Error/Warning Messages This appendix lists and explains the various error and warningmessages that can appear on the 764 display. Figure 32 on page 45shows the In-bar message location. Channels not synchronized Location: Audio View, phase display....

Appendix B: Error/Warning Messages 84 764 Digital Audio Monitor User Manual CODE ERR Location: In-bar. (Code error.) A bi-phase coding violation has occurred in the digitaldata stream. All affected data samples are unreliable, and aretherefore ignored. The instrument treats affected samples as “zero...

Appendix B: Error/Warning Messages 86 764 Digital Audio Monitor User Manual MUTE Location: In-bar. The MUTE indicator flashes when the digital audio data on theinput channel remains at zero-value for n or more consecutivesamples. The factory default value of n is ten (10); it may bechanged through t...

Appendix B: Error/Warning Messages 764 Digital Audio Monitor User Manual 87 NOT PRESENT (Option 01 only) Location: In-bar. The NOT PRESENT flag indicates that, although video input isdetected, there is no active audio on the corresponding channel (nochannel ID is detected). PARITY Location: In-bar. ...

764 Digital Audio Monitor User Manual 89 Appendix C: Options This section describes the following options available with the 764Digital Audio Monitor: H Option 01, Embedded Audio Input H Option 02, Analog Line Output (see page 93) H Power cord options (see page 99) Embedded Audio Input (Option 01) O...

Appendix C: Options 90 764 Digital Audio Monitor User Manual Table 30: Option 01 characteristics (Cont.) Characteristic Description Equalization range Proper operation with up to 19.0 dB loss at 135 MHzusing coaxial cable having 1/f 1/2 loss characteristics with a launch amplitude of 800 mV Return l...

Appendix C: Options 764 Digital Audio Monitor User Manual 91 5. Turn the multi-function knob to highlight the Channels menu item; then press the soft button that corresponds to the channelgroup (channels 1–4; 5–8; 9–12; or 13–16) that you want tomonitor. If you do not know which audio channels are a...

Appendix C: Options 92 764 Digital Audio Monitor User Manual above to select a group with active audio channels; then pressCLEAR MENU to return to the audio view. Configure the Meters. Once you have selected the correct channel group, you can configure the level meter scale and offset byfollowing th...

Appendix C: Options 764 Digital Audio Monitor User Manual 93 NOT PRESENT. The in-bar NOT PRESENT flag indicates that, although video input is detected, there is no active audio on thecorresponding channel (no channel ID is detected). Analog Line Output (Option 02) Option 02 replaces the balanced XLR...

Appendix C: Options 94 764 Digital Audio Monitor User Manual Option 02 instruments are set during manufacture for fixedoutput; refer to Configuring the Output on page 95 forinformation about changing the setting. When outputting to an unbalanced load (0 to 2.0 V RMS variable output only), you must c...

Appendix C: Options 764 Digital Audio Monitor User Manual 95 Configuring the Output Qualified service personnel can change the output configuration withthe following procedure: CAUTION. The 764 contains static-sensitive components. The following procedure should be performed by qualified technicians...

Appendix C: Options 96 764 Digital Audio Monitor User Manual 3. Locate J913 and J914, the two rows of six connector pins on the AES circuit board assembly. The AES board is on the right sideof the 764 when you view the instrument from the rear panel;J913 and J914 are near the end of the AES board th...

Appendix C: Options 764 Digital Audio Monitor User Manual 97 Connecting the Instrument The appropriate method of connecting the Option 02 analog outputsto your system depends on the configured output level and therequirements of your particular installation. High-level, Balanced Output. When using h...

Appendix C: Options 98 764 Digital Audio Monitor User Manual Pin 3 (–) Pin 2 (+) Pin 1 (shield) Analog line output XLR (+) Gnd Receiving equipment unbalanced input Pin 3 (–) Pin 2 (+) Pin 1 (shield) (+) Gnd OR Figure 40: Connecting to an unbalanced input NOTE . Connecting a line to ground as shown i...

Appendix C: Options 764 Digital Audio Monitor User Manual 99 Power Cords Table 33 lists and describes the available power cord options. Pleasecontact your Tektronix representative if the power cord supplied withyour instrument is not correct for the local power supply. Table 33: Power cord identific...

764 Digital Audio Monitor User Manual 101 Glossary CLIP One or more consecutive positive or negative full scale samples.The actual number of consecutive samples that constitute aCLIP may be adjusted through the Level Meters submenu; thefactory setting is one (1). Copy Output a session report via the...

Glossary 102 764 Digital Audio Monitor User Manual Test Level Also called “alignment” or “reference” level. Usually, the signallevel used for system alignment. In the 764, this settingdetermines the placement of level meter markers and a meterbar intensity/color threshold.

764 Digital Audio Monitor User Manual 103 Index A accessories, standard, 1AGC, 28alignment level, 43 See also test level Audio view, 13 B ballistics (meter), 43, 50 PPM, 43, 50True Peak, 44, 50VU, 44, 51 C cable, serial communications, 62CCIR 645, 43Channel Status view, 15, 37CLEAR MENU button, 18 u...

Index 104 764 Digital Audio Monitor User Manual Get commands, 68 H headphones, 7 selecting channels, 48 Headphones submenu, 48, 56 I IEEE 152-1991, 44Ignore Validity Bit, 52Inputs digital audio, 3 configuring, 10 LTC, 5reference, 5RS-232, 6SER. VIDEO (Option 01), 89submenu, 56VITC, 5 interpolation (...

Index 106 764 Digital Audio Monitor User Manual U User Data view, 15, 39 V Validity Bit, ignore, 52VGA video output, 5VIEW buttons, 16Views Audio, 13Channel Status, 15User Data, 15 VOLUME knob, 18VU (meter ballistics), 44 W warning messages CODE ERR, 45, 84Interpolation OFF, 50LOW CONF, 45, 85MUTE, ...