DK-Audio PT 5201 Compact VariTime Operating Manual Download Page 15

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PT 5201

PTV

Product Data

Operating Manual

Revision 2

4-3

Return loss:

>36 dB, to 5 MHz

Sync amplitude:

PAL:

-300 mV ±2%

NTSC:

-286 mV ±2%

Burst amplitude:

PAL:

300 mV ±2%

NTSC:

286 mV ±2%

Video accuracy:

Nominal ±2 %

Timing range:

PAL:

1 fields

NTSC:

1 fields

Timing resolution:

37 ns,

Sc-H phase:

Default 0

, adjustment ± 180

, resolution: 1.4

S/N ratio:

50 dB unweighted to 5 MHz

4.3.5.3

Common Test Signals, SDI and Analog Generator

All signals are in standard 4x3 aspect ratio.

Patterns dedicated for PAL:

EBU Color Bar

75% Color Bar + red

CCIR Line 18

Patterns dedicated for NTSC:

SMPTE Color Bar

FCC Color Bar

Patterns common for NTSC/PAL:

Color Bar ITU801

Color Bar 100%

75% Red

Crosshatch

PLUGE

SDI Check Field

Digital Grey

Staircase 5 step

Staircase 10 step

15 KHz Bl/Wh

White 100%

Black

Window 10%

Window 15%

Window 20%

Window 100%

4.3.6

AES/EBU Audio Generator

Serial digital audio generator with test tones.

Connector:

XLR

Output format:

Balanced 110

Ω

±20% According to AES3 1992

Amplitude:

Typically

Data bitrate:

3.072 Mbit/s

Rise and fall time:

5-30 ns

Coding:

Linear, 20-bits two’s complement binary biphase mark

Summary of Contents for PT 5201 Compact VariTime

Page 1: ...DK AUDIO A S Marielundvej 37 D DK 2730 Herlev Denmark PT 5201 Compact VariTimeTM Sync Generator Operating Manual ...

Page 3: ... 3 2 4 PRODUCT DATA 4 1 4 1 SAFETY CHARACTERISTICS 4 1 4 2 PERFORMANCE CHARACTERISTICS 4 1 4 3 SUMMARIZED DATA 4 1 4 3 1 MASTER FREQUENCY REFERENCE TCXO 4 1 4 3 2 REMOTE CONTROL 4 1 4 3 3 ANALOG GENLOCK 4 1 4 3 4 ANALOG BLACK BURST OUTPUTS 4 2 4 3 5 VIDEO SIGNAL GENERATOR 4 2 4 3 6 AES EBU AUDIO GENERATOR 4 3 4 3 7 WORDCLOCK WCLK GENERATOR 4 4 4 3 8 ANALOG AUDIO GENERATOR 4 4 4 3 9 PRESETS 4 5 4 4...

Page 4: ...NTERFACE SYNTAX 7 11 7 1 1 CONNECTOR DESCRIPTION 7 11 7 1 2 PROTOCOL 7 11 7 1 3 CONFIGURATION AND SYNTAX 7 12 7 1 4 GENERAL INFORMATION 7 12 7 1 5 SYNTAX ELEMENTS 7 13 7 1 6 COMMAND SYNTAX 7 14 7 1 7 SYNTAX OF PROGRAM MESSAGES 7 14 7 1 8 LONG AND SHORT FORM 7 15 7 1 9 SYNTAX OF RESPONSE MESSAGES 7 15 8 COMMANDS SUMMARY 8 1 8 1 MANDATED COMMANDS 8 1 8 2 REQUIRED COMMANDS 8 1 8 2 1 SYSTEM SUBSYSTEM ...

Page 5: ...1 COMMAND ERRORS 199 100 10 1 10 2 EXECUTION ERRORS 299 200 10 1 10 3 DEVICE SPECIFIC ERRORS 399 300 10 2 11 PT 5201 SIGNALS 11 1 11 1 VIDEO PATTERNS 11 1 11 2 PATTERN SELECTIONS AFTER SYSTEM CHANGE 11 2 11 3 AUDIO SIGNALS 11 2 11 4 RESET CONFIGURATION 11 4 ...

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Page 7: ... symbols are marked on the instrument as well Special attention must be paid to the following issues Protective grounding of the instrument is required for the accessible terminals to be safe IEC 1010 1 Safety class I instrument The actual environmental conditions must be checked against the specification Mains voltage must be inside the specified range The opening of covers or removal of parts ex...

Page 8: ...is used in a manner not specified by this manual 2 5 Technical Specification This manual provides technical information important for safe operation of the equipment Please refer to chapter 4 Product Data for information regarding technical specifications and to chapter 5 Installation and chapter 6 Operating Instructions regarding instructions for use Technical assistance may be obtained from your...

Page 9: ...ly that safe operation is impaired the instrument must be made inoperative and secured against unintended operation The appropriate servicing authority must be informed For example safety is likely to be impaired if the instrument fails to perform the intended operations or shows visible damages 2 6 Electrostatic Sensitive Devices All IC and many other semi conductors are susceptible to electrosta...

Page 10: ...Safety PTV PT 5201 Revision 2 Operating Manual 2 4 2 7 Symbols Symbol Explanation Caution risk of electric shock Caution refer to accompanying documents Protective conductor terminal Alternating current ...

Page 11: ...cted in system NTSC PAL and timed in fine steps over the complete sequence The serial digital black and test signals can be timed with a resolution of 37 ns over a 1 field range The analog black bursts are timeable in sub nanosecond resolution over a 4 fields sequence for PAL and 2 fields sequence for NTSC The timing of analog Test Signal Generator follows the timing of the SDI generator i e with ...

Page 12: ... master the reference is locked to an internal high stability TCXO oscillator Temperature Compensated Xtal Oscillator For use in slave applications the genlock function is used The genlock function features genlock to NTSC and PAL video signals Black Burst house sync or a 10 MHz reference clock e g from a GPS receiver The genlock function features passive loop through and has a common timing facil...

Page 13: ... 25 C and after 20 min warm up Specified numerical data without tolerances indicate typical values at nominal ambient temperature 25 C and reflects an average performance 4 3 Summarized Data The instrument has been developed based on the latest relevant ITU SMPTE EBU and AES EBU specifications 4 3 1 Master Frequency Reference TCXO Temperature drift 2 5 ppm 0 50 o C ref 25 o C Ageing 1 ppm year fir...

Page 14: ...de PAL 300mV 2 NTSC 286mV 2 Timing range PAL 4 fields NTSC 2 fields Timing resolution 0 5 o at fsc Sc H phase Default 0 o adjustment 180 o resolution 1 o S N ratio 60 dB unweighted to 5 MHz 4 3 5 Video Signal Generator 4 3 5 1 SDI Output Connector BNC Output impedance 75 Ω 0 5 Ω Format 270 Mb s serial complies with ITU R BT 656 and SMPTE 259 M Return loss 15 dB 5 270 MHz Timing range PAL 1 field N...

Page 15: ...pect ratio Patterns dedicated for PAL EBU Color Bar 75 Color Bar red CCIR Line 18 Patterns dedicated for NTSC SMPTE Color Bar FCC Color Bar Patterns common for NTSC PAL Color Bar ITU801 Color Bar 100 75 Red Crosshatch PLUGE SDI Check Field Digital Grey Staircase 5 step Staircase 10 step 15 KHz Bl Wh White 100 Black Window 10 Window 15 Window 20 Window 100 4 3 6 AES EBU Audio Generator Serial digit...

Page 16: ...C Output impedance 75 Ω 0 5 Ω Output characteristics HC MOS clock 0 5 V un terminated Reference output 44 1 or 48 kHz The 48 kHz is frequency and phase locked to the video The 44 1kHz is the CD audio sample frequency and frequency locked to the video frequency 4 3 8 Analog Audio Generator Connector XLR Output format Balanced 30 Ω Balanced by active circuitry Reference amplitude 0 dBu corresponding...

Page 17: ... the unit Besides essential data for the individual Presets all user accessible parameters for the outputs are included and stored in non volatile memory The Presets are named Preset 1 4 in the unit In the PC Remote Control each preset is identified by Name 24 characters no space Author Date of modification The preset name is displayed in the Preset Status box in the System Status window when the ...

Page 18: ...Hz 0 7 mmp p and 50 m s 2 max acceleration According to IEC Publ 68 test Fc NOTE Unit mounted on vibration table without shock absorbing material Bump Limit range for storage and transport 1000 bumps of 100 m s 2 sine 6 ms duration in each of 3 directions According to IEC Publ 68 test Eb 4 4 4 Safety Comply to IEC1010 1 4 5 Power Supply Voltage 90 250 VAC Frequency 47 63 Hz Power consumption 22 W ...

Page 19: ...PT 5201 PTV Product Data Operating Manual Revision 2 4 7 Mechanical data for two cabinets side by side fitted with 19 rack mount Height 44 mm 1 73 Width 442 mm 18 4 Depth 380 mm 15 Weight 3 8 kg 8 4 lbs ...

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Page 21: ... 1 Grounding Before any other connection is made the instrument must be connected to a protective earth conductor via the three core mains cable At the rear there are means to extra safeguarding a proper grounding e g for improved protection to lightning A screw hole marked with and a corresponding 4 mm screw with earth washer secures the connection Before connecting the equipment to the mains of ...

Page 22: ...ble in reverse order The power supply is a safety and service part The ordering number is 4008 109 86650 5 5 Rack Mounting The PT 5201 Compact Varitime Sync Generator is in a half size 19 rack cabinet The instrument is intended for rack mounting as well as desktop use A rack mount kit for conventional 19 rack is included When the Sync Generator is used in desk top applications PTV recommend the mo...

Page 23: ... sides of the cabinet Do not cover the air vent holes If several cabinets are mounted above each other in a 19 rack special attention must be paid to the temperature inside the rack If the PT 5201 is mounted between other instruments with high surface temperature this cooling may not be sufficient Under these circumstances it is recommended to make space between the instruments and to establish fo...

Page 24: ...l voltage sources before performing any adjustment replacement maintenance or repair which requires the instrument to be opened If repair of the opened instrument is unavoidable only a skilled person who is aware of the hazards involved must carry it out To guarantee safety only original spare parts must be used Access to the Units To gain access to the units remove the mains cable and unscrew the...

Page 25: ... video outputs indicate the selected TV system NTSC PAL for the given output The selected Audio Generator is indicated under AUDIO and the current clock frequency of the Wordclock output is given under WCLK The GENLOCK LED indicates the selected input reference is valid and the internal genlock loop is locked The POWER LED indicates the main power is on and the built in power supply including the ...

Page 26: ... Interface for a technical description Connecting the interface cable from the PC to the unit special attention must be paid to the power source of both parties When the controlling PC is mains power operated the ground potential of the mains power supply for both instruments has to be taking in consideration To reduce problems concerning different mains power ground potential both instruments nee...

Page 27: ...or double click inside the boundaries of the settings of each generator 6 4 Rear Panel The rear panel of the unit contains all output connectors and also input connectors for genlock signals are placed here Furthermore the rear panel features connectors for mains power and two ground terminals All electrical specifications are specified under Product Data 6 5 PC Remote Control Program 6 5 1 Applic...

Page 28: ...d lock of calibration and editing are handled here 6 5 2 1 1 Open The Open menu enables you to open an already existing file or preset Performing an Open command will read the file or preset settings into the PC Remote Contol and give a connected unit the same set of configuration PC Remote Control View System Status Status Bar Files Open From File From Preset To File As To Preset Save Print Prope...

Page 29: ... can be selected from the front panel 6 5 2 1 3 Print Not available 6 5 2 1 4 Properties The Properties menu serve as control for the RS232 interface communication details the calibration and the editing lock Connection the Connection menu enables you to modify the status of the RS232 interface communication port and indicate the default Baud rate and Flow Control In the Port settings the communic...

Page 30: ...tine 6 5 2 3 1 Genlock The Genlock facility enables you to lock all outputs of the PT 5201 to a number of relevant video and clock sources The outputs of PT 5201 are locked to the source in frequency and phase System System refers to the list of relevant video and clock sources PT 5201 is able to use as external reference PAL and NTSC mode PT 5201 will expect a video signal of the given system Int...

Page 31: ...cH Phase The VariTime TM system features adjustment of the ScH Phase in the range of 180º in a resolution of 1º operated using the up down buttons or typed in directly 6 5 2 3 3 SDI The Video signal generator contains 23 basic patterns and signals including Color Bars for the respective TV systems The video outputs deliver signals in two formats simultaneously Analog Composite Video output and SDI...

Page 32: ...rs Analog Audio and AES EBU digital audio and a WordClock output WCLK Due to common rear connectors only one audio generator can be active at a time The AES EBU generator features selectable sample rate video reference lock timing and a number of tones and levels The Analog Audio generator features four tones in a large number of levels and right channel identification Output Selectable between An...

Page 33: ...ction Calibration procedure 1 Turn on the unit and connect it to a PC running the PC Remote Control program 2 Connect a general purpose counter better than 0 1ppm in tolerance to the Black Burst output 3 Unlock the calibration mode in Files Properties System and enter the calibration menu at Edit System Calibration 4 Click on Unlock and expect a TTL clock at 4 5 MHz on the BB1 connector There is n...

Page 34: ... PC 6 5 2 4 2 Status Bar The Status Bar is default and is shown below the Front Panel or System Status window This bar provides information on communications from the PC Remote Control to the connected unit The Status Bar states if a unit is present or not connected disconnected which COM port is selected and baud rate Also it shows if the PC Remote Control program is used in Demo Mode ...

Page 35: ...ruments Vol I IV 7 1 General Description of the Interface Syntax 7 1 1 Connector Description Connector type 9 pin sub D male 7 1 2 Protocol The serial remote operates electrically as an RS 232C communication port The parameter setting for the RS 232 communication port is described in paragraph 5 5 2 3 2 page 5 5 Minimum Configuration of cable between PC and PT5201 NOTE A standard NULL MODEM cable ...

Page 36: ...ramming and computer control is also recommended The paper A beginner s Guide to SCPI by Barry Epler Hewlett Packard Press 1991 can be used to gain the basic knowledge of the ideas behind the SCPI system 7 1 3 Configuration and Syntax Control characters of the RS232 interface Control character Function 0Ahex Terminator i e new line LF Buffers Receive buffer 512 bytes Transmit buffer 128 bytes Seri...

Page 37: ...ated from the header by a space A comma separates several parameters Character strings should be placed in single or double quotation marks The valid parameter ranges are shown in the command tables Non valid values generate an error message 7 1 5 Syntax Elements Semicolon separates two commands of a command Colon separates the keywords of a command In a command line a colon after a separating sem...

Page 38: ... consecutive parameters String data in a parameter must be specified between quotes A quote may either be a single quote dec 39 or a double quote character dec 34 One or more program message units commands may be send within a single program message Program message units are separated by a semicolon A message of one or more units is terminated by a program message terminator The line feed characte...

Page 39: ...rentiate between upper and lower case characters In program messages either the long or short form may be used in any mix of upper or lower case characters There is no semantic difference between upper and lower case in program messages 7 1 9 Syntax of Response Messages The response to a query is a response message unit consisting of one or more parameters data elements Successive parameters are s...

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Page 41: ...ands Command Parameter Status after RST Remarks CLS Clear Status Command ESE ESE ESR IDN Device identification query OPC OPC RST Reset Command SAV 1 to 4 RCL 1 to 4 SRE SRE STB TST WAI 8 2 Required Commands 8 2 1 SYSTem Subsystem Command Parameter Status after RST Remarks ERRor Query only VERSion Query only PRESet RECall 1 to 4 STORe 1 to 4 NAME 1 to 4 name Note 1 AUTHor 1 to 4 author name Note 1 ...

Page 42: ...ment Commands 8 3 1 INPut Subsystem Command Parameter Status after RST Remarks GENLock SYSTem INTernal PALBurst NTSCburst F10MHZ INTernal DELay Field Line HTime 0 0 0 CALibrate ENABLe OFF ON ADJust UP DOWN MIN MAX STORe No query GENLock Query only 8 3 2 OUTPut Subsystem Command Parameter Status after RST Remarks BB1 SYSTem PAL PAL_ID NTSC JNTSC Depends on factory reset PAL NTSC or JNTSC Note 2 DEL...

Page 43: ...ime 0 0 0 SCHPhase 179 to 180 0 BB3 Query only TSGenerator PATTern See Chap 10 PT5201 Signals Depends on factory reset CBEBu or CBSMpte SYSTem PAL NTSC JNTSC Depends on factory reset PAL NTSC or JNTSC Note 2 DELay Field Line Htime 0 0 0 SCHPhase 179 to 180 0 1 4 resolution EMBaudio See Chap 10 PT5201 Signals OFF Digital output only TSGenerator AUDio No query OUTPut ANALog AESebu AESebu ANALog SIGN...

Page 44: ...Ming See Chap 10 PT5201 Signals 0 48kHz only WORDclock F441KHZ F48KHZ F48KHZ CLICk 1 3 3 AESebu Note 1 String data must NOT contain any spaces as this is not supported in this version Note 2 The system selected depends on the factory reset applied Another system for the factory reset may be selected by means of the PC Remote Control software delivered with the instrument See also chapter 11 4 Rese...

Page 45: ...he answer should be ignored IDN IDENTIFICATION QUERY The response contains four fields Field 1 Company name Field 2 Product name Field 3 KU number Field 4 Software release i e the software status of all programmable parts in the PT5201 Example IDN response PTV PT5201 KU012345 1 0 OPC OPERATION COMPLETE The device accepts this command but the functionality has not been implemented in this version O...

Page 46: ... accepts this command but the functionality has not been implemented in this version WAI WAIT TO CONTINUE The device accepts this command but does not respond to it because the functionality has not been implemented in this version 9 2 Required Commands 9 2 1 SYSTem Commands SYSTem ERRor Command for reading an SCPI error message from the error queue See chapter 10 for a complete list of error code...

Page 47: ...n spaces Example SYST PRES AUTH 1 Monroe name author of preset number 2 to Monroe SYST PRES AUTH 2 response MONROE SYSTem PRESet DATE Command for settings the date of a user preset Four user presets from 1 to 4 are available The date should be entered as year month day Example SYST PRES DATE 4 00 6 1 date preset number 2 to june1 2000 SYST PRES DATE 4 response 00 06 01 9 2 2 STATus Commands STATus...

Page 48: ...rameters Field Line HTime where Field sets the field offset Line sets the line offset and HTime sets the horizontal time in ns i e HTime PAL 64000 0ns HTime NTSC 63492 1ns If this command is issued when the genlock system is internal or 10MHz the timing will be saved and restored whenever PALBurst of NTSCBurst is selected It is not possible to select a delay outside the range of the selected syste...

Page 49: ...AL ADJ MIN set the reference to minimum deviation INPut GENLock CALibrate STORe Command to store the current setting of the internal 10 MHz reference INPut GENLock Command to display the status and the settings of the genlock The response is defined as lock info system Field Line HTime where lock info is either GENLOCKED or UNLOCKED For an explanation regarding the rest of the response see the com...

Page 50: ...e sets the line offset and HTime sets the horizontal time in ns i e HTime PAL 64000 0ns HTime NTSC 63492 1ns It is not possible to select a delay outside the range of the selected system See the table below ANALOG PAL 625 lines NTSC 525 lines Field Line Field Line 3 0 312 2 0 311 1 0 312 1 0 262 0 0 311 0 0 261 0 0 312 0 0 262 1 0 311 1 0 261 2 0 312 2 0 3 0 311 4 0 Example OUTP BB2 DEL 2 4 3245 2...

Page 51: ...rying to select a pattern which is not available in the active system will result in an error namely 200 Execution error Example OUTP TSG PATT WIN100 set the pattern for a 100 window OUTP TSG PATT response WIN100 OUTPut TSGenerator SYSTem Command to select the system of the SDI and Video outputs Systems available are System Description PAL PAL NTSC NTSC with setup JNTSC NTSC no setup If the curren...

Page 52: ... Phase value must be in the range 180 ScH Phase 180 Example OUTP TSG SCHP 123 set the ScHPhase for 123deg OUTP TSG SCHP response 123 OUTPut TSGenerator EMBaudio SIGNal Command to select the signal of the embedded audio in the SDI output Refer to chapter 10 PT5201 Signals for a description of the signals available Example OUTP TSG EMB SIGN set the embedded audio to OFF OUTP TSG EMB SIGN response OF...

Page 53: ...analog audio levels available Please note that the settings will be updated even though the output of the audio signal has been selected as AES EBU The settings will take effect the next time the analog audio output is selected Example OUTP AUD ANAL LEV 4 set the analog audio level to 4 dBu OUTP AUD ANAL LEV response 4 OUTPut AUDio ANALog CLICk Command to select the click rate for the audio signal...

Page 54: ... is selected Example OUTP AUD AES SIGN S500HZ set the AES EBU audio signal to Stereo 500Hz OUTP AUD AES SIGN response S500HZ OUTPut AUDio AESebu LEVel Command to select the audio level of the AES EBU audio output signal Refer to chapter 10 PT5201 Signals for a description of the AES EBU audio levels available Please note that the settings will be updated even though the output of the audio signal ...

Page 55: ...fer to chapter 10 PT5201 Signals for a description of the analog audio levels available The click rate can be a click every 1 or 3 seconds Please note that the settings will be updated even though the output of the audio signal has been selected as ANALOG The settings will take effect the next time the AES EBU audio output is selected Example OUTP AUD AES CLIC 1 set the click rate to every 1 secon...

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Page 57: ...ontains more than twelve characters 114 Header suffix out of range The command is invalid because the value of the numeric suffix attached to the program mnemonic is out of range e g OUTP BB12 is illegal because only 3 BBs exist 121 Invalid character in number An invalid character for the data type was encountered e g an alpha in a decimal value 124 Too many digits The mantissa of a decimal numeri...

Page 58: ...nication error A communication error on the serial port was detected 361 Parity error in program message Parity bit not correct when data received on the serial port 362 Framing error in program message A stop bit was not detected when data was received e g a bad rate mismatch 363 Input buffer overrun Software or hardware input buffer on serial port overflows ...

Page 59: ...C Bar CBEBu PAL FCC C Bar CBFCc NTSC C Bar ITU801 CBEBu8 X 100 C Bar CB100 X 75 C Bar Red CBRed75 PAL 75 Red RED75 X M BURST CCIR Line18 CCIR18 PAL WINDOW Window 10 WIN10 X Window 15 WIN15 X Window 20 WIN20 X Window 100 WIN100 X 15kHz Bl Wh BLWH15KHZ X White 100 WHITe100 X Black BLACk X SPECIAL SDI Check Field SDICheck X Digital Grey DGRey X LINEARITY Staircase 5step STAircase5 X Staircase 10step ...

Page 60: ...pecific patterns SMPTE C Bar EBU C Bar FCC C Bar EBU C Bar 11 3 Audio Signals Remote name Embedded Analog AES EBU Signals Off OFF X Silence SILence X Stereo 500 Hz S500HZ X X Stereo 1 kHz S1KHZ X X X Stereo EBU 1 kHz SEBU1KHZ X X Stereo 8 kHz S8KHZ X X Digital audio Levels Silence SILence X X 0 dBFS 0 X 9 dBFS 9 X 12 dBFS 12 X 15 dBFS 15 X 16 dBFS 16 X 18 dBFS 18 X 20 dBFS 20 X Analog audio Levels...

Page 61: ...dBu 11 X 12 dBu 12 X 13 dBu 13 X 15 dBu 15 X 18 dBu 18 X 20 dBu 20 X 24 dBu 24 X 27 dBu 27 X 30 dBu 30 X 33 dBu 33 X 36 dBu 36 X Silence SILence X Digital AudioTiming 9 6 µs 9 6 X 8 8 µs 8 8 X 8 0 µs 8 0 X 7 2 µs 7 2 X 6 4 µs 6 4 X 5 6 µs 5 6 X 4 8 µs 4 8 X 4 0 µs 4 0 X 3 2 µs 3 2 X 2 4 µs 2 4 X 1 6 µs 1 6 X 0 8 µs 0 8 X 0 0 µs 0 0 X 0 8 µs 0 8 X 1 6 µs 1 6 X 2 4 µs 2 4 X 3 2 µs 3 2 X 4 0 µs 4 0 X...

Page 62: ...s the actual settings will be reset according to the following PAL NTSC 7 5 setup NTSC 0 setup BB1 3 System PAL NTSC JNTSC Delay 0 0 0 0 0 0 0 0 0 0 0 0 ScH Phase 0 0 0 SDI Video Pattern CBEBu CBSMpte CBSMpte System PAL NTSC JNTSC Delay 0 0 0 0 0 0 0 0 0 0 0 0 ScH Phase 0 0 0 Embedded Audio OFF OFF OFF AES EBU Audio On On On System PAL NTSC NTSC Signal S1KHZ S1KHZ S1KHZ Level 18 20 20 Timing 0 0 0...

Page 63: ...PT 5210 PTV Operating Manual Revision 2 11 5 END OF DOCUMENT ...

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