Download
Share
Print this page
  1. Manuals
  2. Brands
  3. Leader Manuals
  4. Test Equipment
  5. LT 428
  6. Instruction manual

Leader LT 428 Instruction Manual

Component digital sync generator
Hide thumbs

Advertisement

Quick Links

Download this manual
COMPONENT DIGITAL SYNC GENERATOR
INSTRUCTION MANUAL
LEADER ELECTRONICS CORP.

Advertisement

loading
Need help?

Need help?

Do you have a question about the LT 428 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Leader LT 428

Summary of Contents for Leader LT 428

  • Page 1 COMPONENT DIGITAL SYNC GENERATOR INSTRUCTION MANUAL LEADER ELECTRONICS CORP.
  • Page 2 Contents GENERAL SAFETY SUMMARY ..............I Introduction..................... 1-1 Scope of Warranty ....................1-1 Operating Precautions ..................... 1-1 General and Applications ..............2-1 General........................2-1 Configuration......................2-1 Applications ......................2-2 Specification ................... 3-1 Safety Characteristics ....................3-1 Performance Characteristics..................3-1 Specification......................3-1 Installation....................
  • Page 3 Command Errors [-199, -100] .................. 9-1 Execution Errors [-299, -200] ................... 9-1 Device Specific Errors [-399, -300] ................9-2 10 LT 428 Signals ..................10-1 10.1 Video Patterns......................10-1 10.2 Pattern Selections after System Change ............... 10-2 10.3 Audio Signals ......................10-2 10.4 Reset Configuration ....................
  • Page 4 ♦ Precautions on Contents Should you find the contents in this manual and any of its technical terms confusing, please feel free to contact your local Leader agent. ♦ Symbols and Terms Following terms and symbols indicate necessary warnings and cautions used in this manual and on the product are there for safe operation.
  • Page 5 If the attached cord is damaged stop using it and contact your local Leader agent. Should you use a damaged cord, it could cause a shock or create a fire hazard.
  • Page 6 When such a case occurs, turn off the power switch and pull the plug of the cord from the plug socket. Contact your local Leader agent after confirming there is no fire. ♦...
  • Page 7 Please conform to the above warnings and cautions for safe operation. There are cautions in each area of in this instruction manual, so please conform to each caution. If you have any questions about this manual, please feel free to contact your local Leader agent...
  • Page 8 Scope of Warranty This Leader instrument has been manufactured under the test quality control guidelines. Leader shall not be obligated to furnish free service during the warranty period under the following conditions. 1. Repair of malfunction or damages resulting from file, natural calamity, or improper voltage applied by the user.
  • Page 9 CAUTION 1.2.2 Short and External Input to Output Terminal • Short on Output Terminal Do not short the output terminal. To do so could cause damage to the instrument. • External Signal to Output Terminal Do not apply an external signal to the output terminal. Addition of an external signal to the output terminal could cause damage to the instrument or any product connected to it.
  • Page 10 Shipping. Accuracy, however, might change slightly over time due to the age and general deterioration of the components. Periodic calibration for the instrument is highly advisable. For more details on calibration, please contact your local Leader agent. 1.2.6 Routine Maintenance Before cleaning procedure starts, power down the instrument and disconnect the plug from the socket.
  • Page 11 The new digital studios need cost efficient and reliable synchronization for the main equipment to work reliably. For this purpose LEADER offers the LT 428 as the fully integrated solution eliminating any costs associated with modular structures, support of many different signal types and extensive operating facilities.
  • Page 12 Applications The LT 428 is designed to manage slave as well as master operations as a stand-alone unit. In systems where LT 428 operates as a master the reference is locked to an internal, high stability TCXO oscillator (Temperature Controlled Xtal Oscillator).
  • Page 13 Specification Safety Characteristics This apparatus has been designed and tested in accordance with the safety Class I requirements of EN 61010-1 (“Safety Requirements for Electrical Measuring Apparatus”), and is safe as supplied. This manual contains information and warnings, which must be followed during operation to ensure operator and service personnel safety.
  • Page 14 Return loss: >36 dB, to 5 MHz Sync amplitude: PAL: -300 mV ±5 % NTSC: -286 mV ±5 % Burst amplitude: PAL: 300 mV ±5 % NTSC: 286 mV ±5 % ±4 fields Timing range: PAL: ±2 fields NTSC: SCH phase: adjustment ±180 3.3.5 Test Signal Generator...
  • Page 15 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 %...
  • Page 16 3.3.8 Analog Audio Generator Connector: Balanced 30 Ω Output format: Balanced by active circuitry. 0 ± 0.8 dBu, corresponding to 775 mV Reference Amplitude: 3.3.8.1 Analog Audio Output Signals Tones: Stereo 500 Hz Stereo 1 kHz Stereo EBU 1 kHz, single click in ch. A Stereo 8 kHz Click rate: 1 or 3 s.
  • Page 17 3.3.10 Environmental Conditions 3.3.10.1 Regulations and Standards ♦ EN 55103-1 (emissions) ♦ EN 55103-2 (immunity) 3.3.10.2 Climatic Conditions Temperature range: Ambient operating: - +40 C (41 F - +104 Humidity: Non condensing (IEC 721) 3.3.11 Power Supply Voltage: 90 - 250 VAC Frequency: 47 - 63 Hz Power consumption:...
  • Page 18 Rack Mounting The LT 428 Component Digital 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.
  • Page 19 Double set of LT 428 The LT 428 has no built-in cooling fan and will therefore rely on air convection from the air vent holes in the front, back and sides of the cabinet. Do not cover the air vent holes.
  • Page 20 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 LT 428 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...
  • Page 21 The software configuration is controlled remotely by means of a PC Remote Control program running on a standard PC and an RS-232 SCPI communication protocol sending commands and queries to the LT 428. LED’s on the front panel indicate the actual generator output formats. The actual and the preset instrument settings are all stored in the instrument’s Flash PROM memory for immediate recall...
  • Page 22 Negligence of this matter can cause damages to the LT 428 or the PC COM port How to Get Started These Instructions tell you how to connect your LT 428 to the PC for the very first time. 1. Connect the LT 428 Component Digital Sync Generator unit to the mains using the power cord.
  • Page 23 5.5.1 Application Description The PC Remote Control is designed to serve as operating panel for LT 428 Component Digital Sync Generator solely. It will not work with any other LEADER product. All settings, configurations and calibration of Sync Generator are executed from the PC Remote Control interface.
  • Page 24 5.5.2 Menu Description Fig. 1: Menu tree of LT 428 PC Remote Control (shaded boxes are not implemented) 5.5.2.1 Files Menu The menus under Files are similar in nature to other Windows® applications. Here are menus featuring opening and saving presets and files. Furthermore the RS-232 interface communication details and lock of calibration and editing are handled here.
  • Page 25 The Exit menu will close the PC Remote Control and save the current settings in an INI file on the hard drive. If the media, from where the PC Remote Control program is executed, is write protected or you click on No to the question “Save changes to LT 428 PC Remote Control?” no data are saved.
  • Page 26 5.5.2.5.1 Genlock The Genlock facility enables you to lock all outputs of the LT 428 to a number of relevant video and clock sources. The outputs of LT 428 are locked to the source in frequency and phase. System: System refers to the list of relevant video and clock sources LT 428 is able to use as external reference.
  • Page 27 System: The digital outputs are able to generate Black Burst in the following formats: PAL, PAL with ID, NTSC 7.5% and NTSC 0% Timing: The digital unit is generating Black Burst with a resolution of 0.15 ns and the timing range of 4 fields for NTSC and 8 fields for PAL. Field, Line and Offset can be modified within their relevant limits.
  • Page 28 5.5.2.5.4 Audio LT 428 contains two independent audio generators, 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.
  • Page 29 Factory Reset: Factory Reset overwrites all current settings with the settings the unit has from factory. The reset is selectable between: NTSC 7.5%/525, NTSC 0%/525 or PAL/ The factory settings are listed in 10.4 Reset Configuration. Note: Factory Reset will not affect the memory of any of the four user presets. Calibration: The calibration menu enables you to calibrate the unit without taking it out of a rack and out of service.
  • Page 30 status. Editing of the settings is accessible by double click on each generator. By double click on a generator the corresponding generator window opens and enables editing. The System Status window is not default and opens by checking System The settings are stored in an ini file on the used PC.
  • Page 31 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. LT 428 Minimum Configuration of cable between PC and LT 428. NOTE: A standard “NULL-MODEM” cable may be used as well...
  • Page 32 The LT 428 communication protocol complies with the: ♦ SCPI 1995.0: Standard Commands for Programmable Instruments, Vol I-IV. This protocol which is based on the IEEE 488.2 (IEEE Standard Codes, Formats, Protocols, and Common Commands). For the description of the commands a basic knowledge of operation of the instrument is assumed.
  • Page 33 General Information The remote system is organized in a tree structure. The structure defines sub-systems. In order to access command lower in the tree or in different branches the entire command string should be used. Indentation is used to indicate the root level and the branches. The highest level to the left.
  • Page 34 Command Syntax A command consists of a “header” and one or several “parameters”. Header and parameters are separated by space. A header may consist of several keywords. Syntax of Program Messages A command or query is called a program message unit. Such a program message unit consists of a header, or a header separated by a space from one or more parameters.
  • Page 35 Long and Short Form Program messages may be sent in either long or short form ♦ The long form is the full word ♦ The short form is the first character of the long form The short form in a syntax specification is shown in upper case, and the remaining part of the long form is shown in lower case characters.
  • Page 36 Commands Summary All commands listed consists of both a set- and request-command unless specifically listed in the table as <Query only> or <No query> Mandated Commands Command Parameter Status after *RST Remarks *CLS Clear Status Command *ESE *ESE? *ESR? *IDN? Device identification query *OPC...
  • Page 37 7.2.2 STATus Subsystem Command Parameter Status after *RST Remarks :OPERation [:EVENt]? <Query only> :CONDition? :ENABle :ENABle? :QUEStionable [:EVENt]? <Query only> :CONDition :ENABle :ENABle? :PRESet? <Query only> Instrument Commands 7.3.1 INPut Subsystem Command Parameter Status after *RST Remarks :GENLock :SYSTem INTernal|PALBurst| INTernal NTSCburst|F10MHZ :DELay...
  • Page 38 PAL, NTSC, or JNTSC :DELay <Field>,<Line>,<Htime> 0,0,0 :SCHPhase <-179 to 180> :BB3? <Query only> :TSGenerator :PATTern See Chap. 10, LT 428 Depends on factory Signals reset: CBEBu or CBSMpte :SYSTem PAL|NTSC|JNTSC Depends on factory Note 2 reset: PAL, NTSC, or...
  • Page 39 Command Parameter Status after *RST Remarks :SIGNal See Chap. 10, LT 428 S1KHZ Signals :LEVel See Chap. 10, LT 428 Depends on factory Signals reset: -18 or -20 :TIMing See Chap. 10, LT 428 48kHz only Signals :WORDclock F441KHZ | F48KHZ...
  • Page 40 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 LT 428. Example:*IDN? response: LEADER,LT428,KU012345,1.0 • *OPC...
  • Page 41 • *SRE SERVICE REQUEST ENABLE The device accepts this command but the functionality has not been implemented in this version. • *SRE? SERVICE REQUEST ENABLE QUERY The device responds to this command but the functionality has not been implemented in this version, i.e.
  • Page 42 • SYSTem:PRESet:STORe Command to store the actual configuration in a preset. Four user presets from 1 to 4 are available. Example: SYST:PRES:STOR 2 store configuration in preset 2 • SYSTem:PRESet:NAME Command for naming a user preset. Four user presets from 1 to 4 are available. The number of characters in the name are limited to sixteen, 16, and may NOT contain spaces.
  • Page 43 8.3. Instrument Commands 8.3.1. INPut Commands • INPut:GENLock:SYSTem Command for selecting the GENLOCK system. Possible selections are System Description INTernal Internal PALBurst PAL burst lock NTSCburst NSTC burst lock F10MHZ 10 MHz lock Example: INP:GENL:SYST F10MHZ set system to 10 MHz lock INP:GENL:SYST? response: F10MHZ •...
  • Page 44 • INPut:GENLock:CALibrate:ENABle Command to enable calibration of the internal 10 MHz oscillator reference. This command must be issued before using the INP:GENL:CAL:ADJ command Example: INP:GENL:CAL:ENAB ON enable calibration of the internal 10 MHz reference INP:GENL:CAL:ENAB? response: ON • INPut:GENLock:CALibrate:ADJust Command to calibrate the internal 10 MHz reference. The reference is adjusted by setting a parameter, which may be UP, DOWN, MIN or MAX.
  • Page 45 8.3.2 OUTPut Commands • OUTPut:BB1:SYSTem • OUTPut:BB2:SYSTem • OUTPut:BB3:SYSTem Command to select the system of the three Black Burst output. Systems available are System Description PAL_ID PAL with line 7 pulse NTSC NTSC with setup JNTSC NTSC no setup Example: OUTP:BB1:SYST PAL_ID set system for BB output 1 to PAL with line 7 pulse OUTP:BB1:SYST?
  • Page 46 • OUTPut:TSGenerator:PATTern Command to select the pattern of the VIDEO/SDI output. Refer to Chapter 10 LT 428 Signals for a description of the patterns available. Not all the patterns are available in both systems. Trying to select a pattern, which is not available in the active system, will result in an error, namely: -200,”Execution error”.
  • Page 47 -123 • OUTPut:TSGenerator:EMBaudio:SIGNal Command to select the signal of the embedded audio in the TSG SDI output. Refer to Chapter 10 LT 428 Signals, for a description of the signals available. Example: OUTP:TSG:EMB:SIGN set the embedded audio to OFF...
  • Page 48 Command to select the click rate for the audio signal of the analog audio output signal. Refer to Chapter 10, LT 428 Signals, for a description of the analog audio levels available. The click rate can be a click every 1 or 3 seconds.
  • Page 49 Command to select the audio signal of the AES/EBU audio output signal. Refer to Chapter 10, LT 428 Signals, for a description of the AES/EBU audio signals available. Please note that the settings will be updated even though the output of the audio signal has been selected as ANALOG.
  • Page 50 Command to select the click rate for the audio signal of the AES/EBU audio output signal. Refer to Chapter 10 LT 428 Signals for a description of the analog audio levels available. The click rate can be a click every 1 or 3 seconds.
  • Page 51 Error Codes Command Errors [-199, -100] Error Error string Number [description/explanation/example] -101 Invalid character A command or parameter contains an invalid character, e.g. a header containing an ampersand, SYST:VERS&. -102 Syntax error An unrecognized command or data type was encountered, e.g. a string was received when the generator didn’t accept strings.
  • Page 52 Device Specific Errors [-399, -300] Error Error string Number [description/explanation/example] -360 Communication 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.
  • Page 53 LT 428 Signals Symbols: PAL: Only in 625-lines PAL system. NTSC: Only in 525-lines NTSC system. X: Both PAL and NTSC systems 10.1 Video Patterns. Remote name LT 428 CBAR SMPTE C.Bar CBSMpte NTSC EBU C.Bar CBEBu FCC C.Bar CBFCc NTSC C.Bar ITU801...
  • Page 54 10.2 Pattern Selections after System Change The tables apply when one or more signals only exists in one system. COLORBAR GENERATOR: PAL Specific patterns: → EBU C.Bar SMPTE C.Bar → 75 % C.Bar+Red SMPTE C.Bar → CCIR Line18 SMPTE C.Bar NTSC specific patterns: →...
  • Page 55 Remote name Embedded Analog AES/EBU -1 dBu -2 dBu -3 dBu -4 dBu -5 dBu -6 dBu -7 dBu -8 dBu -9 dBu -10 dBu -11 dBu -12 dBu -13 dBu -15 dBu -18 dBu -20 dBu -24 dBu -27 dBu -30 dBu -33 dBu -36 dBu...
  • Page 56 Remote name Embedded Analog AES/EBU +6.4 µs +6.4 +7.2 µs +7.2 +8.0 µs +8.0 +8.8 µs +8.8 +9.6 µs +9.6 +10.4 µs +10.4 10.4 Reset Configuration Whenever the SCPI command *RST is issued and/or the preset button on the front is used as a reset, (pressing it for more than15 seconds), the actual settings will be reset according to the following: NTSC 7.5 % setup...
  • Page 57 Maintenance When calibration or service is required, contact your local Leader agent. 11-1...
  • Page 58 March 4, 2003. 3...