ProTelevision Technologies A/S Marielundvej 16 DK-2730 Herlev Denmark PT 5780 DVB-T Modulator (ASIC) Instruction Manual
Trade Mark of the DVB Digital Video Broadcasting Project PROTELEVISION technologies An ISO 9001 Certified Company PT 5780 DVB-T Modulator, Instruction Manual: Copyright 2003 Total number of pages: 95 ProTelevision Technologies A/S, Denmark All Rights Reserved Printed in Denmark 2003-08-25 Revision: 3.
PT 5780 DVB-T Modulator ProTelevision Technologies Contents Contents 1 SAFETY.................................................................................................................. 1-1 1.1 1.2 1.3 1.4 INTRODUCTION........................................................................................................ 1-1 SAFETY PRECAUTIONS ............................................................................................. 1-1 CAUTION AND W ARNING STATEMENTS ..........................
PT 5780 DVB-T Modulator 4.4 4.5 4.6 4.7 ProTelevision Technologies Contents 4.3.4 Configuration Menu System ....................................................................... 4-11 4.3.4.1 Top-level configuration menu access............................................ 4-12 4.3.4.2 Context sensitive menu access.................................................... 4-13 4.3.4.3 TRANSMISSION Menu System (Menu ID 1000) ........................... 4-14 4.3.4.4 SIGNAL Menu System (Menu ID 2000) ...........
PT 5780 DVB-T Modulator ProTelevision Technologies Contents 6.2.3.13 TEST commands ........................................................................ 6-23 6.2.3.14 FACTORY commands ................................................................. 6-24 6.3 COMMANDS S UMMARY ........................................................................................... 6-25 6.3.1 Mandated Commands ............................................................................... 6-25 6.3.
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PT 5780 DVB-T Modulator 1 ProTelevision Technologies Safety Safety Read this chapter carefully before installation and use of the instrument. 1.1 Introduction The instrument described in this manual has been designed for use by properly trained personnel only. Adjustment, maintenance and repair of the exposed equipment should only be carried out by qualified personnel who are aware of hazards involved. 1.
Safety ProTelevision Technologies 1.4 Impaired Safety Protection 1.4.1 Technical Specifications PT 5780 DVB-T Modulator This manual provides technical information important for safe operation of the equipment. Please refer to the Chapter Product Data for information regarding technical specifications and the Chapter Installation and Operating Instructions regarding instructions for use.
PT 5780 DVB-T Modulator 1.4.
Safety 1.6 ProTelevision Technologies PT 5780 DVB-T Modulator Symbols Symbol ~ Colour: Explanation: Red High voltage terminal: a terminal at which a voltage, with respect to another terminal or parts exists or may be adjusted to 1000 V or more. (High voltage > 1000 V). Black/Yellow Live part shock risk of electric shock. Black/Yellow To preserve the instrument from damage the operator must refer to an explanation in the instruction manual. White/Black Protective earth (grounding) terminal.
PT 5780 DVB-T Modulator 2 ProTelevision Technologies Introduction and Applications Introduction and Applications Designed to meet the most demanding requirements of today’s Digital Terrestrial Television Broadcast Market, the DVB-T Modulator PT 5780 from ProTelevision Technologies is ranked number one in its class. A key factor in the products success is the quality of the coding and modulation process.
Introduction and Applications ProTelevision Technologies PT 5780 DVB-T Modulator To extend the standard range of transmission modes to include support of hierarchical modulation the Hierarchical Modulation option PT 8733 must be added. Hierarchical modulation allows simultaneous transmission of two MPEG-2 transport streams. The compromise between data rate and ruggedness can be set differently between the two virtual channels.
PT 5780 DVB-T Modulator ProTelevision Technologies Introduction and Applications accordance with the SNMP protocol (Get, Set and SNMP traps). This remote control option is intended for systems solutions where it is desired to integrate the control of a range of (SNMP compliant) equipment in a common management system, the SNMP manager. The management system must be adapted/designed to the specific systems requirements and it is therefore not included with the supplied SNMP client option. 2.1.
Introduction and Applications 2.3 ProTelevision Technologies PT 5780 DVB-T Modulator Transport Stream Inputs The standard version of the PT 5780 DVB-T modulator is provided with two serial (ASI) inputs. By non-hierarchical mode the active input is selected either via the front panel or the remote control. By hierarchical mode one input is assigned to the high priority stream and the other input is assigned to the low priority stream.
PT 5780 DVB-T Modulator ProTelevision Technologies Introduction and Applications In Table 2-2 the maximum useful bit rates are indicated for all valid transmission modes in a 7 MHz system.
Introduction and Applications ProTelevision Technologies PT 5780 DVB-T Modulator With Multi Frequency Network operation (MFN) the built-in Transport Stream Adapter (TSA) performs the function of discarding any stuffing present on the input stream, inserting new stuffing (0-packets) to adjust the bit rate and finally recalculating the PCR values of the MPEG2 transport stream. Thus the modulator will accept any transport stream with a useful bit rate lower than the maximum indicated in the table.
PT 5780 DVB-T Modulator 2.7 ProTelevision Technologies Introduction and Applications Test Facilities The DVB-T Modulator PT 5780 features a range of useful test signal for both off-line and on-line testing. Single carrier: The single carrier test signal is an off-line test signal (i.e. it interrupts the modulators data transmission).
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PT 5780 DVB-T Modulator 3 Installation 3.1 Initial Inspection ProTelevision Technologies Installation Check the contents of the shipment for completeness and possible transport damage. If the contents are incomplete or damaged, a claim should be filed with the carrier immediately, and the ProTelevision Help Desk should be notified in order to facilitate the repair or replacement of the instrument. 3.2 Safety Instruction 3.2.
Installation ProTelevision Technologies PT 5780 DVB-T Modulator Warning: Make sure that only fuses of the required rating, voltage, and of the specified type are used for replacement. The use of repaired (jumpered) fuses and/or the short-circuiting of the fuse holder are prohibited. Fuses must only be replaced by a qualified person who is aware of the hazards involved. 3.4 Rack Mounting This instrument is delivered in a 19" cabinet.
PT 5780 DVB-T Modulator ProTelevision Technologies Installation 3.6 Configuration 3.6.1 Wiring schemes for RS 232 (handshake not implemented) PT 5780 PC controller 1 2 3 4 5 6 7 8 9 RxD / TxD TxD / RxD DTR / DSR * GND / GND DSR / DTR* RTS / CTS* CTS / RTS* 9 pins *:Not implemented PT 5780 9 pins PC controller 1 2 3 4 5 6 7 8 9 RxD / TxD TxD / RxD DTR / DSR* GND / GND DSR / DTR* RTS / CTS* CTS / RTS* 9 pins 3.6.
Installation 3.6.3 ProTelevision Technologies PT 5780 DVB-T Modulator Mute The modulator output can be forced to the muted state by establishing a connection between pin 7 and 8 of the Alarm connector (see paragraph 3.6.2 above). 3.6.4 Reset The modulator can be reset by briefly establishing a connection between pin 7 and 9 of the Alarm connector (see paragraph 3.6.2 above). 3.7 Access to and Replacement of Parts 3.7.
PT 5780 DVB-T Modulator ProTelevision Technologies 4 Operating Instructions 4.1 Front Panel Operating Instructions All operational control and configuration are conveniently carried out from the front panel. The two line by forty characters LCD display, in conjunction with four cursor keys and an EXECUTE button, allows easy operation of the PT 5780 DVB-T Modulator. The display is used to indicate the status of various system parameters and also allows changes to be made to these system parameters.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator Status Menu System Push [EXECUTE] button Push [UP ARROW] button and [RIGHT ARROW] button to return to the Status Menu in sequence to enter the System. Configuration Menu System Rev 3.0 23.01.2003 Configuration Menu System u/5780/work/manual v3/drawings/status and config system (note 1). Note 1: Activates the Configuration Menu System at the top-level default entry point (Menu ID 1000 - ).
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions The EXECUTE button is used to • Enter the configuration menu system (GENERAL or SPECIFIC) when in the status menu system. • Confirm changes made to configurable parameters. 4.1.3 Front Panel Display To guide the user through operations, symbols of the push buttons, which are active at that particular time appear in the top right hand side of the display.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator Mains Connector Mains voltage receptacle with ON/OFF switch. ON: When “I” is pressed. OFF: When “O” is pressed. Input Connectors A and B Two BNC inputs (A and B) are provided for asynchronous serial transport streams (ASI). Remote Connectors 1 and 2 Two 9 pole male Sub-D connectors are utilised for the remote connectors. They are configured as RS 232 connections.
PT 5780 DVB-T Modulator 4.3 ProTelevision Technologies Operating Instructions Menu System – Description and Operation The PT 5780 DVB-T Modulator is equipped with different functions dependent on the purchased options. An operating menu chart, which reflects the structure of the menu system when all possible functions are installed and enabled, is provided in appendix A.. The menu system is designed as a “tree” structure, with a number of different “branches”.
Operating Instructions ProTelevision Technologies In case new micro-code has to be installed, the following is displayed: ---------------------------------------**** R E C O N F I G U R I N G **** =micro-code being installed -= ---------------------------------------- PT 5780 DVB-T Modulator The first line will flash. After new micro-code has been downloaded, the system automatically reboots. Following successful start-up, the first status display window appears – see Chapter 4.3.3.1.
PT 5780 DVB-T Modulator 4.3.3.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator Status Window ‘b1’ – The Mode Status Window This window shows the output configuration settings: IFFT, constellation, Code rate, network mode (MFN or SFN), hierarchical mode (none, a1, a2 or a4)), and guard interval.
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions optional delay value. The modulator does not implement the frequency offset and the absolute power value but both values can be extracted via the modulator remote control (SCPI/RS232) for use by the transmitter control system if desired. ---------------------------------------Optional Delay Time:-30.0 ìs wv8E Freq:400 Hz Power:10.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator Status Window ‘f1’ – Demodulator Status Window This window displays the status of the built-in COFDM demodulator. The COFDM demodulator monitors, when enabled, the modulators IF output. If the output signal is a valid COFDM signal the display will indicate the signals transmission parameters (IFFT, Constellation, Code rate, Hierarchy, and guard interval.).
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions Additional information about each alarm can be obtained via the configuration sub menu –-> menu ID 3200 (accumulated count of the alarm type and specific information for generic alarms).
Operating Instructions 4.3.4.1 ProTelevision Technologies PT 5780 DVB-T Modulator Top-level configuration menu access To enter the configuration menu at the top level of the menu hierarchy press the [EXECUTE] button followed by the [RIGHT ARROW] button. After pressing the [EXECUTE] button the below display will be shown. If the [RIGHT ARROW] button is not pressed within about 3 seconds the display will close automatically and return to the last open status window.
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions th longer then 8 characters, the name is truncated and a dot (.) is included as the 8 character. In a few cases, the “current” parameter is automatically updated in the display window, e.g. the Clock. The lowest level of any particular “branch” of the menu system produces a window that displays the available parameter list, a configurable value or a non-configurable value.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator The context sensitive access to the configuration system will open directly the configuration sub menu that is related to the status menu window in which the activation of the configuration menu system is initiated. For example, pressing [EXECUTE] à [EXECUTE] when the “Input status” display is active will open the à sub menu for configuration of input source.
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions MFN/SFN (ID 1300) The menu allows selection of the network mode to be applied for the transmission; Multi Frequency Network – MFN or Single Frequency Network – SFN. Note: The menu is only accessible when the SFN option PT 8732 is installed. 4.3.4.4 SIGNAL Menu System (Menu ID 2000) The signal menu system (menu ID 2000) is accessed by pressing the [EXECUTE] button followed by the [RIGHT ARROW] button as described in paragraph 4.3.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator choice of standard channel rasters (ITU UHF combined with either the VHF B, VHF L or VHF I raster) and a user defined channel raster. When the user-defined raster is selected the user can configure this raster via sub menu 2231 with respect to base frequency and start channel number. The ‘base frequency’ represents the centre frequency of the first channel in the userdefined raster (for example 529,5 MHz).
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions ID 2340). The menu for setting the peak clipping level allows the user to control the ratio between peak power and average RMS power of the COFDM spectrum. If the clip level is set to 0dB the peak power is limited to +17dB relative to average RMS power. If the clip level is increased to 4dB the peak power relative to average RMS power will be limited to 13dB. The average RMS power remains unchanged.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator Reference input (ID 2600) This menu allows the user to select the 10MHz clock reference source and to configure parameters with respect to the 10MHz and 1PPS reference inputs. Sub menus are available for selecting 10MHz source (menu ID 2610), impedance for the 1PPS reference input (menu ID 2620), impedance for the 10MHz reference input (menu ID 2630), and trigger level for the 1pps input.
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions There are a total of 13 possible alarm types. Five of the alarm conditions are independent of the instrument version while eight of the alarm conditions are only available for specific instrument configurations.
Operating Instructions ProTelevision Technologies continued from previous page: ID Number Alarm Source/Condition 10 RF tuner / “type” 11 RF Tuner level 12 Demodulator 1 / “type” 13 Demodulator 2 / “type” PT 5780 DVB-T Modulator Description Indicates that an alarm of the specified type has been raised for the RF tuner module (for specific alarm types see below).
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions Alarm Information menu (ID 3200) This menu allows the user to access further information concerning the status of the various alarms.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator Post-Viterby BER (sub-menu ID 3442): User definition of the bit error rate threshold above which the demodulator-2 alarm for Post-Viterby bit error rate is raised. Default bit error rate threshold is 1E-4. The adjustable range is 1E-10 to 1E1. UCE (sub-menu ID 3442): User definition of the UCE counter value at which the demodulator-2 alarm for UCE is raised. Default UCE count is 10000. The adjustable range is 1 to 1000.
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions The CONFIGURE – AUTO ESCAPE MENU menu (menu ID 5200) allows the user to enable (ON) or disable (OFF) the return to the last active Status Display window (Chapter 4.3.3), from the Configuration Menu System (Chapters 4.3.4 and 4.3.4.1) when no key has been activated for 60 seconds.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator instrument in question. The menu allows furthermore the user to input a new options key if additional options are to be installed/enabled at a later date. The CONFIGURE – STATUS MENU ID (menu ID 5B00) configures the manner in which the status menu ID shown in the bottom right hand corner of every Status Display window (See Chapter 4.3.3) is displayed. It can either be turned off (“Off”), flash, or be displayed as normal. 4.3.4.
PT 5780 DVB-T Modulator 4.3.4.9 ProTelevision Technologies Operating Instructions RECEPTION Menu System (Menu ID 7000) The RECEPTION menu is only available with the DVB-T Re-Modulator PT 5788 (RF Tuner must be enabled).
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator Spectrum (Sub-menu ID 7356): User definition of the spectrum polarity for of the received signal at the tuner input. Default setting is Normal (carrier 1 located at lowest frequency). Selectable settings are Normal and Inverted (carrier 1 located at highest frequency).
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions located at lowest frequency). Selectable settings are Normal and Inverted (carrier 1 located at highest frequency). 4.3.4.10 EVENT LOG Menu System (Menu ID 8000) The event log menu system allows the user to observe the recorded events (sub menu ID 8100) and to clear the event log (sub menu ID 8200).
Operating Instructions 4.3.5.2 ProTelevision Technologies PT 5780 DVB-T Modulator Editing of Numerical Values ---------------------------------------Cfg. TX Ident <5800>wv8E 65,335 [0..65,535] ---------------------------------------(the character 5 alternates between ‘5’ and ‘_’ at approximately 2 Hz) The configurable value that appears on the display is always the current value and the cursor is always initially positioned on the last digit.
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions ---------------------------------------Sig. Out. RF Level (dB) <2250>wv8E -0.07 [-10.0 .. 0.0] ---------------------------------------(the characters ‘E’ and ‘7 ’ flash at approximately 2 Hz) In this case all the buttons perform the same functions as when editing a configurable value.
Operating Instructions Navigating: w 8 6 5 EXECUTE 4.3.5.4 ProTelevision Technologies PT 5780 DVB-T Modulator Aborts any changes made and moves up one menu level. Aborts any changes made and moves up one menu level. Aborts any changes made and moves up one menu level. Aborts any changes made and moves up one menu level. Saves the edited value to memory and returns to the menu level above. Editing of Percentage Values ---------------------------------------Cfg.
PT 5780 DVB-T Modulator ProTelevision Technologies Operating Instructions ---------------------------------------****** DEFAULT DATA LOADED ****** =Release Keys -= ---------------------------------------On releasing the keys, the following window is displayed for approximately 1 second (LUI – Local User Interface): ---------------------------------------********* REBOOTING ********* LUI Factory Reset ---------------------------------------After this the system reboots and the display reflects this.
Operating Instructions ProTelevision Technologies PT 5780 DVB-T Modulator alarm to warn the user that the (external) reference signal has been lost. Note, as before, there is no automatic muting of the output signal, whilst the internal 10 MHz signal is in operation. A short discontinuity in the output signal will occur when the instrument switches from the external to internal frequency reference.
PT 5780 DVB-T Modulator ProTelevision Technologies 5 Remote Interface 5.1 General Description Remote Interface The serial remote allows control of virtually all functions in the modulator as well as the monitoring of various instrument settings. The serial remote operates electrically as an RS 232C communication port. The settings for the RS 232 communication port can be set up using the front panel of the modulator (see Chapter 4.3.2) or SCPI commands.
Remote Interface 5.2.2 ProTelevision Technologies PT 5780 DVB-T Modulator Syntax of Program Messages A command or query command 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. The program header separator between the header and the first parameter must be at least one “white space” character. The header consists of one or more mnemonics (key words) describing the command.
PT 5780 DVB-T Modulator ProTelevision Technologies Remote Interface The instrument will always send the response data in capitals. Headers are not sent in the response messages, only the parameters. 5.2.4 Long and Short Form Program messages may be sent in either long or short form.
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PT 5780 DVB-T Modulator ProTelevision Technologies 6 RS232 Communication 6.1 References - RS232 Communication IEEE 488.2-1987: IEEE Standard Codes, Formats, Protocols, and Common Commands. SCPI 1995.0: Standard Commands for Programmable Instruments, Vol I-IV. “A Beginner’s Guide to SCPI”, Barry Epler, HEWLETT-PACKARD PRESS, 1991. http://www.scpiconsortium.org/ http://ourworld.compuserve.com/homepages/acea/Scpi_uk.htm 6.2 Commands Explanation 6.2.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • *SRE SERVICE REQUEST ENABLE The device accepts this command but does not act on it. • *SRE? SERVICE REQUEST ENABLE QUERY The device accepts this query command but does not act on it. Note that this query command responds with a “0”. • *STB? READ STATUS BYTE QUERY The device accepts this query command but does not act on it. Note that this query command responds with a “0”.
PT 5780 DVB-T Modulator ProTelevision Technologies RS232 Communication • STATus: QUEStionable:ENABle The device accepts this command but does not act on it. • STATus: PRESet The device accepts this command but does not act on it. 6.2.3 Instrument Commands 6.2.3.1 DIAGnostic commands • DIAGnostic:DISPlay The device accepts this command but does not act on it. • DIAGnostic:ERRorqueue:RESet The device accepts this command but does not act on it.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • SYSTem:DATE Command to amend the system date using the format yyyy,mm,dd. Example: SYST:DATE 2001,6,28 SYST:DATE? Store 28 June 2001 as the current date Response: 2001,6,28 • SYSTem:TIME Command to amend the system time using the format hh,mm,ss.
PT 5780 DVB-T Modulator ProTelevision Technologies Option No.
RS232 Communication 6.2.3.4 ProTelevision Technologies PT 5780 DVB-T Modulator DISPlay commands • DISPlay:CONTrast Adjusts the display contrast in percentage terms. Example: DISP:CONT 20 Set the display contrast to 20%. DISP:CONT? Response: 20 6.2.3.5 INPut commands • INPut:ASWitch Command for automatically switching between the primary & secondary inputs. The default setting is such that this facility is turned off.
PT 5780 DVB-T Modulator INP: SEC A,B INP: SEC? ProTelevision Technologies RS232 Communication Select inputs A (high priority) and B (low priority). Response: A, B • INPut:REFerence:SOURce Command for selecting the 10 MHz input reference source from AutoDetect, External or Internal. Example: INP:REF:SOUR INT INP:REF:SOUR? Select an internal 10 MHz reference source.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator Query command only. Provides the transport stream buffer fill indicator for the high priority signal in a hierarchical system, in terms of number of packages. Example: INP:BUFF:HP? Response: 1 • INPut:BUFFerfill:LP? Query command only. Provides the transport stream buffer fill indicator for the low priority signal in a hierarchical system, in terms of the number of packages.
PT 5780 DVB-T Modulator ProTelevision Technologies RS232 Communication • OUTPut:MODE:CONStell Command to set the constellation. Parameter choices are QPSK, QAM16 and QAM64. Example: OUTP:MODE:CONS QPSK OUTP:MODE:CONS? Set constellation to QPSK. Response: QPSK • OUTPut:MODE:GUARd Command to set the guard interval. Parameter choices of guard interval are ¼, Example: OUTP:MODE:GUAR G1_4 OUTP:MODE:GUAR? 1 1 , /16 and /32. Set guard interval to ¼.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • OUTPut:IF:LEVel This command is used to set the IF level in the IF version of modulator. The level range possible is –2 to 8 dB in 0.1 dB steps. Note that the command :OUTPut:LEVel could also be used – see this command description below. Example OUTP:IF:LEV –1.0 OUTP:IF:LEV? Set level to –1dB. Response: -1.0 • OUTPut:RF:FREQency This command is used to set the RF value in the RF version of modulator.
PT 5780 DVB-T Modulator ProTelevision Technologies RS232 Communication • OUTPut:CRASter Command to select between the fixed ITU UHF, ITU VHF, ITU UHF and VHF channel rasters and the user programmable channel raster (UCHannel). Applicable only if the RF converter is installed and enabled. Example: OUTP:CRAS UCH OUTP:CRAS? Select the user defined channel raster. Response: UCHANNEL • OUTPut:VSUBsystem Command to select the VHF standard from either standard B, standard L or standard I.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • OUTPut:BANDwidth Command to select the output channel bandwidth. Parameters available for this command are 6, 7 and 8 MHz. However the 6 MHz parameter option is only available if the 6 MHz option is installed and enabled in the modulator. Example: OUTP:BAND 7 OUTP:BAND? Select a 7 MHz bandwidth. Response: 7 • OUTPut:WINDow:ENABle Command for enabling (ON) and disabling (OFF) the spectrum window filter.
PT 5780 DVB-T Modulator ProTelevision Technologies Example: OUTP:PEAK:CLIP 5 OUTP:PEAK:CLIP? Or :OUTP:PEAK? 6.2.3.7 RS232 Communication Set clip level to 5dB. Response: 5 MONitor command • :MONitor:SOURce Command to select a source to monitor. Choices are HP Input, HP Output, LP Input, LP Output, Test picture, or Demodulator. Example: MONitor:SOURce HPIN MONitor:SOURce? 6.2.3.8 Monitor the HP input signal.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • PRECorrect:USERpoints String data describing the user point location and the active view type for the “active” curve, using a maximum of 130 characters. Example: PREC:USER ”0000202020A0002020402020202040204020200040202040202020202010404 0200022102020202020202020202020202020202020202020202020201010404010" Describes the non-linear pre-corrector user point location.
PT 5780 DVB-T Modulator ProTelevision Technologies RS232 Communication PREC:CURV? Response: 8192,0,8192,0,8192,6,8192,0,8192,0, 8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192 ,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,81 92,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0, 8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192,0,8192 ,0,8192,0,8192,0,8192,0
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator 7,-4,8181,-4,8175,-4,8171,-4,8168,-4,8167,-4,8167,-4,8170,-4,8174,-4,8179,-4,8185,-4,8192,-4, 8199,-4,8206,-4,8213,-4,8219,-4,8224,-4,8228,-4,8231,-4,8232,-4,8231,-4,8228,-4,8222,-4,821 4,-4,8205,-4,8196,-4,8186,-4,8177,-4,8169,-4,8164,-4,8161,-4,8161,-4,8162,-4,8165,-4,8169,-4, 8173,-4,8177,-4,8180,-4,8182,-4,8183,-4,8182,-4,8181,-4,8179,-4,8177,-4,8175,-4,8173,-4,817 1,-4,8169,-4,8168,-4,8167,-4,8166,-4,8166,-4,8165,-4,8164,-4,8164,
PT 5780 DVB-T Modulator 6.2.3.9 ProTelevision Technologies RS232 Communication LPRecorrect (Linear Pre-corrector) commands • LPRecorrect:ENABle Command to activate (ON) or deactivate (OFF) the linear pre-corrector function. Switching the linear pre-corrector on activates the linear pre-corrector parameters in the “active” preset location. Example: LPR:ENAB ON LPR:ENAB? Activate the linear pre-corrector function.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • LPRecorrect:CHECksum Query command only. This is a simple 32-bit addition sum of all the coefficients from 0 to 23 in the “active” location or in a particular preset location. The number of ‘preset’ curves can vary from 1 to 10. Example: LPR:CHEC? 2 Response: 511 • LPRecorrect:PRESet Transfer coefficients to, or read coefficients from, a preset location.
PT 5780 DVB-T Modulator Example: SFN:MARG? ProTelevision Technologies RS232 Communication Response: 350 • SFN:MARGin:HP? Query only command to view the actual delay (in ms) from the high-priority mega-frame is received in the input buffer till it’s transmitted from the modulator (only available when the instrument is configured SFN and hierarchical mode.
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • SFN:MIPData Command to output MIP data on the RS232 serial ports 1 or 2. The query command provides the serial port number to which the MIP data is output. If there is no MIP data output, the response to this command is 0. The MIP frames (used parts only) can only be output at a 115200 baud rate.
PT 5780 DVB-T Modulator ProTelevision Technologies Continued from previous page ID Number Alarm Source/Condition 6 Timing adjusted 7 1PPS Reference loss 8 Mega-Frame (MIP) Loss 9 RF converter 10 RF tuner 11 RF Tuner level 12 Demodulator 1 RS232 Communication Description Indicates that the modulator has adapted the internal system clock or internal 1PPS timing to allow for a mismatch between the local network timing reference (10MHz and 1PPS) and the timing reference (MIP) embedded in the inc
RS232 Communication ProTelevision Technologies continued from previous page ID Number Alarm Source/Condition 13 Demodulator 2 PT 5780 DVB-T Modulator Description Indicates that an alarm has been raised by demodulator 2 to signal that one or more of the set thresholds have been exceeded. The thresholds are specified via the commands ALAR:LIM:BERB, ALAR:LIM:BERB and ALAR:LIM:UCER.
PT 5780 DVB-T Modulator 6.2.3.12 ProTelevision Technologies RS232 Communication EVENT commands • EVENt:COUNt Command to read the total number of events recorded in the event log since the last reset of the log system. Example: EVEN:COUN? Response: 35 That is, 35 events are recorded in the log system. • EVENt:CLEAr Command to clear the event log memory (event log cleared will be recorded as the first event in the reset event log).
RS232 Communication ProTelevision Technologies PT 5780 DVB-T Modulator • TEST:M50C Command to define the start carrier for the –50 carrier test signal. Available only when a –50 carrier test signal has been enabled. TEST:M50C 1600 TEST:M50C? 6.2.3.14 Start carrier for –50 carrier test signal of 1600. Response: 1600 FACTORY commands Only the query formats of these commands are accessible by the customer. • FACTory:SNINst Command to query the modulator’s serial number.
PT 5780 DVB-T Modulator 6.3 ProTelevision Technologies RS232 Communication Commands Summary All commands listed consist of both a set and request command unless specifically listed in the table. 6.3.1 Mandated Commands Command Parameter Status after Factory Reset *CLS *ESE *ESE? *ESR? *IDN? *OPC *OPC? *RST *SRE *SRE? *STB? *TST? *WAI No action No action No action No action No action No No No No No 6.3.2 Required commands 6.3.2.
RS232 Communication ProTelevision Technologies 6.3.3 Instrument commands 6.3.3.1 DIAGnostic subsystem 6.3.3.2 Command Parameter Status after Factory Reset :DISPlay :ERRorqueue? :ERRorqueue :RESet - - No query. No action Query only. No action - - No query. No action 6.3.3.4 Remarks Remarks SYSTem subsystem Command Parameter Status after Factory Reset :PRESet [:RECall] :STORe :NAMe 1 to 10 1 to 10 1 to 10,<”Name”> - :DATE :TIME :OINStalled :OUSed <”xxxx.xxxx.
PT 5780 DVB-T Modulator 6.3.3.
RS232 Communication Command ProTelevision Technologies PT 5780 DVB-T Modulator Parameter Status after Factory Reset Remarks :FREQuency 35 to 37 MHz 36 MHz :LEVel -2.0 to 8.0 dB 0.0 Only in IF version. Step size of 1Hz. Query only in RF version. Only in IF version. Step size of 0.1dB. Query only in RF version. :FREQuency 30 to 1000 MHz 474 MHz :LEVel -10.0 to 0.0 dB 0.0 35 to 37MHz (if IF version) 30 to 1000 MHz (if RF version) -2.0 to 8.0 dB (if IF Version) -10.0 to 0.
PT 5780 DVB-T Modulator 6.3.3.7 6.3.3.8 RS232 Communication MONitor subsystem Command Parameter :SOURce HPIN | LPIN | HPOUT | LPOUT | TPICture | DEModulator Status after Factory Reset HPIN Remarks PRECorrect (Nonlinear Pre-corrector) subsystem Command Parameter :ENABle :GAIN :POINt OFF | ON -3.0 to 3.0 dB 0 to 255, {, } :CURVe :DESCription {,} <”Curve Description”> :USERpoints <”User Point Information”> :CURVe :PRESet
RS232 Communication 6.3.3.10 ProTelevision Technologies PT 5780 DVB-T Modulator SFN subsystem Command Parameter :DEL :MARGin? Or :MARGin:HP? :MARGin:LP? -1 to 1 sec Status after Factory Reset 0 :MAXDelay? :OPTional :TIMeoffset? :FREQoffset? :POWer? :MIPData 6.3.3.11 OFF | ON,1 | ON,2 OFF Remarks In 100ns steps. Query only. Response in msecs. Query only. Response in msecs. Query only. Query only. Query only. Query only. Query command provides serial port no. to which MIP data is output.
PT 5780 DVB-T Modulator 6.3.3.12 ProTelevision Technologies RS232 Communication EVENt subsystem Command Parameter Status after Factory Reset :COUNt? Query only. Response format is: n : total number of events recorded in the log No Query. Clears the entire event log. Query only.
RS232 Communication ProTelevision Technologies 6.4 Error Codes 6.4.1 Command errors [-199, -100] PT 5780 DVB-T Modulator Error Number Error string [description/explanation/example] -100 Command error The command is invalid or incorrect. Invalid character A command or parameter contains an invalid character, e.g. a header containing an ampersand, SYST:VERS&. Syntax error An unrecognised command or data type was encountered, e.g. a string was received when the generator did not accept strings.
PT 5780 DVB-T Modulator RS232 Communication Error Number Error string [description/explanation/example] -131 Invalid suffix The suffix is syntactically incorrect. Suffix too long The suffix contains more than twelve characters. Suffix not allowed A suffix was encountered after a numeric element that does not allow suffixes. Character data error An error in the character was encountered. String data error An error in the string data was encountered.
ProTelevision Technologies 6.4.3 Error Number Error string [Description/explanation/example] -241 Hardware missing Indicates that a legal program command or query could not be executed because of missing device hardware. Device specific errors [-399, -300] Error Number Error string [Description/explanation/example] -300 Device-specific error -350 Queue overflow A specific code entered into the queue in lieu of the code that caused the error.
PT 5780 DVB-T Modulator ProTelevision Technologies Appendix A Menu System Maps A set of charts describing the menu system is provided attached overleaf in order to diagrammatically show the structure of the menu system and the various menu options and parameters. The charts enclosed are: • Status Menu System • Configuration Menu System (page 1 of 2) • Configuration Menu System (page 2 of 2) All menu windows in the menu system contain a four-digit number in the top right hand position.
PT 5780 DVB-T Modulator ProTelevision Technologies Appendix B Document History Rev.: 1.0 1.1 Date: 280801 181001 Name: DG DG 2.0 301101 DG 3.0 30.01.2003 HSO 3.1 13.03.2003 HSO 3.11 25.08.2003 HSO Instruction Manual Details: First version of manual. Amendments made to reflect changes made in software from software version 1.01 to software version 1.1. Amendments made to reflect changes made in software from software version 1.1 to software version 2.0.
