Snell & Wilcox. Operator s Manual MDD500S. NTSC Decoder. December 1998

Transcription

1 Snell & Wilcox MDD500S NTSC Decoder December 1998 Operator s Manual SNELL & WILCOX LTD DURFORD MILL, PETERSFIELD, HANTS. GU31 5AZ TEL +44 (0) FAX +44 (0) UNITED KINGDOM MDD500S Version 1 Issue 3 SNELL & WILCOX 0.1

2 Safety Warnings Always ensure that the unit is properly earthed and power connections correctly made. This equipment shall be supplied from a power system providing a PROTECTIVE EARTH having a neutral connection which can be reliably identified. connection and The power terminals of the IEC mains input connector on the rear panel are identified as shown below: E = Protective Earth Conductor N = Neutral Conductor L = Live Conductor Power cable supplied for countries other than the USA The equipment is normally shipped with a power cable with a standard IEC moulded free socket on one end and a standard IEC moulded plug on the other. If you are required to remove the moulded mains supply plug, dispose of the plug immediately in a safe manner. The colour code for the lead is as follows: GREEN/YELLOW lead connected to E (Protective Earth Conductor) BLUE lead connected to N (Neutral Conductor) BROWN lead connected to L (Live Conductor) Power cable supplied for the USA The equipment is shipped with a power cord with a standard IEC moulded free socket on one end and a standard 3-pin plug on the other. If you are required to remove the moulded mains supply plug, dispose of the plugimmediately in a safe manner. The colour code for the lead is as follows: GREEN lead connected to E (Protective Earth Conductor) WHITE lead connected to N (Neutral Conductor) BLACK lead connected to L (Live Conductor) The terminals of the IEC mains supply lead are identified as shown opposite: Note that for equipment that is not fitted with a mains power switch, to comply with BS60950 Clauses and 2.6.9, the power outlet suppling power to the unit should be close to the unit and easily accessible. Warnings Voltages within this unit can be lethal under certain circumstances. Where power is required to be connected to the unit during servicing great care must be taken to avoid contact with these voltages. Maintenance should only be carried out by suitably qualified personnel. No part of this publication may be transmitted or reproduced in any form or by any means, electronic or mechanical, including photocopy, recording or any information storage and retrieval system, without permission being granted, in writing, by the publishers or their authorised agents. MDD500S Version 1 Issue 3 SNELL & WILCOX 0.2

3 EMC Standards This unit has been designed to conform to the following standards: Electromagnetic Compatibility-Generic Immunity Standard BS EN :1992 The European Standard EN :1992 has the status of a British Standard and is related to European Council Directive 89/336/EEC dated 3rd May Electromagnetic Compatibility-Generic Emission Standard BS EN :1992 The European Standard EN :1992 has the status of a British Standard and is related to European Council Directive 89/336/EEC dated 3rd May Safety Standards This unit conforms to EN60950:1992 as ammended by ammendment A1(May 1993) and ammendment A2(March 1994). Specification for safety of technology equipment, including electrical business equipment. EMC Performance of Cables and Connectors Snell & Wilcox products are designed to meet or exceed the requirements of the appropriate European EMC standards. In order to achieve this performance in real installations it is essential to use cables and connectors with good EMC characteristics. All signal connections (including remote control connections) shall be made with screened cables terminated in connectors having a metal shell. The cable screen shall have a large-area contact with the metal shell. COAXIAL CABLES Coaxial cables connections (particularly serial digital video connections) shall be made with high-quality double-screened coaxial cables such as Belden 8281 or BBC type PSF1/2M. D-TYPE CONNECTORS D-type connectors shall have metal shells making good RF contact with the cable screen. Connectors having "dimples" which improve the contact between the plug and socket shells, are recommended. CAUTION: These servicing instructions are for use by qualified personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. MDD500S Version 1 Issue 3 SNELL & WILCOX 0.3

4 Table of Contents SECTION 1 Introduction Description Features Operational Block Diagram Specifications 3 Installation Power Connections Communication Connections Input Connections Output Connections Operation Menu System Diagram opp. 4.1 Control Panel and Menu System Dedicated Push Buttons Menu Details Card Edge Controls Appendices Appendix 1 Proposed SMPTE Standard for Fault reporting in Television Systems Appendix 2 Proposed SMPTE Recommended Practice Packing List The unit is supplied in a dedicated packing carton provided by the manufacturer and should not be accepted if delivered in inferior or unauthorised materials. Carefully unpack the carton and check for any shipping damage or shortages. Any shortages or damage should be reported to the supplier immediately. Enclosures: * MDD500S Decoder * Power cable * Operator s Handbook MDD500S Version 1 Issue 3 SNELL & WILCOX 0.4

5 Manual Revision Record Date Version No. Issue No. Change Comments First Issue UL data added Menu changes Blanking, Status and logging Section 4 for Software V1.4.2 onwards MDD500S Version 1 Issue 3 SNELL & WILCOX 0.5

6 Snell & Wilcox Snell & Wilcox MDD500S NTSC Decoder Operator s Manual MDD500S NTSC Decoder Operator s Manual MDD500S Version 1 Issue 3 SNELL & WILCOX 0.1

7 SECTION 1 Introduction DESCRIPTION The MDD500S has an adaptive multi-dimensional filter which can work across 5 fields. Analogue inputs and digital outputs are provided. The unit is contained in a single 1U rack case, meeting current EMC regulations (BS EN for emission and BS EN for immunity) Control is via card edge switches or by using a KUDOS active front panel (Shoebox) via the RollCall remote control system. MDD500S MDD500S Version 1 Issue 3 SNELL & WILCOX 1.1

8 SECTION 1 Introduction FEATURES Analogue to Serial Digital Four Rec656 4:2:2 outputs Synchronise frame operation Tolerant to non-broadcast quality analogue inputs Output may be locked to input Fully supports EDH on output High quality analogue and Digital filtering RollCall control protocol with built-in gateway to RS422 Built-in test pattern generator All 10-bit digital design MDD500S Version 1 Issue 3 SNELL & WILCOX 1.2

9 SECTION 1 Introduction OPERATIONAL BLOCK DIAGRAM MDD500S MDD500S Version 1 Issue 3 SNELL & WILCOX 1.3

10 SECTION 2 Specifications INPUT SIGNALS Composite Reference Two inputs (A and B ) of Composite video at 1V p-p level when terminated in 75 Ohms via loop-through BNC connectors Standard Video or black burst via loop-through BNC connectors for 75 Ohms. OUTPUT SIGNALS Serial Digital Four isolated serial digital outputs are available via BNC connectors for connection to 75 Ohms systems. Output level 800 mv ±10% Output return loss better than MHz Note that to ensure reliable transmission of serial digital signals without causing unacceptable levels of radiated emissions, only high quality 75 Ohm co-axial cable should be used. The cable must also be terminated with a precision 75 Ohm load. EDH A single BNC connector providing error status reporting in accordance with SMPTE 269M. This is an Opto-coupled output, open for OK, closed for fault or power fail. SIGNAL PATH Analogue Input Two composite inputs via passive loop-through BNC connectors for 75 Ohms. Nominal input level 1 V p-p. Return loss better than -35 db to 5.5 MHz. Pre-Filter Response Passband flatness better than ±0.1 db to 5.75 MHz Group delay variation less than 5 ns to 5.75 MHz Rejection greater than 40 db at 8 MHz Analogue to Digital Reference Input RollCall Input Rate Conversion Analogue-to-digital conversion is performed using a 10-bit converter One input via passive loop-through BNC connectors for 75 Ohms. Nominal input level 1 V p-p composite video, black burst at standard level or mixed syncs at 2 V p-p. Return loss better than -35 db to 5.75 MHz. One input via BNC connector for 75 Ohms. For connection to RollCall network All digital rate conversion is performed operating on a data path with a minimum of 10 bits resolution. The rate conversion method used is the subject of a Snell & Wilcox patent. MDD500S Version 1 Issue 1 SNELL & WILCOX 2.1

11 SECTION 2 Specifications Synchroniser Control A full 10-bit digital frame synchroniser is incorporated into the main signal processing path. The output of the unit may be locked to the input video, the reference video or allowed to free run. Limited control functions are available from card edge switches with modes of operation indicated by LED s. Full control using RollCall which can control the unit from a P.C. or a KUDOS Active remote front panel (Shoebox). Test Digital Output The main board has a sophisticated built-in test mode where the integrity of all data paths and all memory locations are tested and status reported via RollCall and a failed unit can be analysed using a P.C. Four serial digital outputs are provided via BNC connectors for 75 Ohms. The serial component digital output is in accordance with SMPTE 259M-C Return loss is better than -15 db to 270 MHz. EDH Output Power Requirements Temperature Range Mechanical An output providing EDH information via available via a BNC connector and is in accordance with SMPTE 269M-C 90 V to 250 V 50/60Hz A.C. IEC Socket Fused 1A(T) (Note that EN60950 clause requires safe operation taking into account a tolerance of +6% to -10% on this voltage range) Power Consumption 50VA maximum 0 to 40 C operating (Unit incorporates a cooling fan) The unit is ruggedly constructed in a 19" 1U steel rack mount case. Dimensions 483mm x 457mm x 45mm (W, D, H.) Weight 7 kg MDD500S Version 1 Issue 1 SNELL & WILCOX 2.2

12 SECTION 3 Installation POWER CONNECTIONS This is the IEC320 mains power connector suitable for a standard IEC type power cable and contains a 1A(T) fuse. If a fused type plug is fitted to the cable a fuse of 7A (F) rating should be installed. POWER ON/OFF SWITCH The power ON/OFF switch is located behind the drop-down front panel in the left hand corner. MDD500S Version 1 Issue 1 SNELL & WILCOX 3.1

13 SECTION 3 Installation COMMUNICATIONS CONNECTIONS CONTROL RS422 This 9 pin D connector on the rear panel is the RS422 control connector. Connections are as follows: Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Ground Transmit TXA Receive RXB Common (Transmit Signal) Ground Common (Receive Signal) Transmit TXB Receive RXA Ground REMOTE PANEL This 9-pin D connector allows an interconnection to be made to a remote or other panels in a multiple-unit system. ROLLCALL This single BNC connector allows the unit to be connected to the RollCall network communications system. For more details of the RollCall system see Section 1 MDD500S Version 1 Issue 1 SNELL & WILCOX 3.2

14 SECTION 3 Installation INPUT CONNECTIONS COMPOSITE INPUT These are the two composite (cvbs) video inputs to the unit via loop-through BNC connectors for 75 Ohms. If the loop-through facility is not used a BNC 75 Ohm terminating plug should be fitted on the unused connector. Nominal input level is 1 V p-p. Either A or B input may be selected using the front panel controls. REFERENCE The unit and its output signals may be reference locked to an external analogue (black burst or composite video) signal using the REFERENCE connector. This input expects a standard level signal via loop-through BNC connectors for 75 Ohms. If the loop-through facility is not used a BNC 75 Ohm terminating plug should be fitted on the unused connector. Note that any reference signal supplied must be compatible with the operating standard of the unit. SERIAL These connectors have no function on this unit and connections should not be made to them. COMPOSITE PARALLEL INPUT This connector has no function on this unit and connections should not be made to it. MDD500S Version 1 Issue 1 SNELL & WILCOX 3.3

15 SECTION 3 Installation OUTPUT CONNECTIONS COMPONENT and SYNC OUTPUTS These connectors have no function on this unit and connections should not be made to them. SERIAL OUTPUTS There are four outputs of Serial digital video available from the unit via these BNC connectors for 75 Ohms. EDH This BNC connector provides an output for error status reporting in accordance with SMPTE 269M. This is an opto-coupled output, open for OK, closed for fault or power fail. For more details refer to the Appendix. MDD500S Version 1 Issue 1 SNELL & WILCOX 3.4

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17 SECTION 4 Operation OPERATION FROM A KUDOS ACTIVE FRONT PANEL (SHOEBOX) All operational parameters and selections are made using a system of menus displayed in two LCD windows. Menus are selected by push buttons and further menu selections made by rotating a spinwheel and pressing a push button. The spinwheel also allows continuously variable parameters, e.g. Gain, to be adjusted and the setting to be seen in the LCD window. Various specific operations may be achieved by operating dedicated push buttons. The Menu System (See MDD500S Menu System drawing on previous page) The system may be considered structured as a set of menus and sub-menus which are displayed in the central LCD window. The left hand LCD window will display the current input/output standard selections of the unit and information messages. The DISPLAY buttons allows the information displayed to toggle between the modules current setup and more detailed data including software version etc. The highest level menu is called the Main Menu and contains the names of the lower-level menus which may be scrolled through using the spinwheel. The sub-menu may be then be selected by pressing the push button adjacent to the arrowhead in the text line of the menu name. This sub-menu will then be displayed in the window and will have the option of selecting another sub-menu in the same manner, or allow the adjustment of a particular parameter. Parameters enabled will appear as highlighted reverse text (white text on a black background) Note that the spinwheel will be operative when the LED labelled SCROLL is illuminated, indicating that a menu with more than four text lines is being displayed. Operating the spinwheel then allows the other text lines to be displayed. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.1

18 SECTION 4 Operation THE LCD DISPLAY WINDOWS Control Window The control window displays all Selection Menus and sub-menus. An example is shown opposite. The selection is made by pressing the button adjacent to the required item and will become highlighted (reverse text) when active. Information Window The left hand window has text indicating current selections and various messages. Input... Setup... Genlock... Output... TPG... Status... The DISPLAY SELECT buttons allow the Information Window to display two different sets of information: 1 Identity Codes The first line will show the unit name e.g. MDD500S The second line will show the unit address code and the RV (RollCall Version) MDD500S (Unit Name) Ref:OK Inp:OK NTSC Ref:Pic This line may be blank or show: Presetting or Ref Locked to Input The third line will show the unit identity (RollCall) for that unit as three sets of digits separated by a dot. 1st set =The version of the control unit 2nd set=variant of software version 3rd set =Control compatibility version number The fourth line will display system save codes MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.2

19 SECTION 4 Operation 2 Current selections and conditions First Line: MDD500-S (Unit Name) This line shows the name of the unit, in this case the default name of MDD500-S. If the name has been chnged in the Unit Name Menu the new name will appear here. Second line: Ref:OK Inp:OK NTSC MDD500S (Unit Name) Ref:OK Inp:OK NTSC Ref:Pic This line may be blank or show: Presetting or Ref Locked to VHS This shows that the reference input has a signal, the signal input has a valid signal and the unit will be decoding in the PAL standard. Third Line: Ref: Pic This line shows that the reference is derived from the input picture source. Fourth Line: This line may be blank or show one of the following: Presetting Presetting indicates that the unit has been asked to return all settings to their default values and the unit is performing this operation. or SAVING 1 (...8) or RECALLING 0 (...8) This indicates that the unit is Saving or Recalling to a particular location. Note that the default settings are saved in location 0. New settings cannot be saved in location 0 but settings in location 0 may be recalled. if the line shows: SAVE 0 this indicates that the recall function is not enabled. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.3

20 SECTION 4 Operation USING THE DEDICATED PUSH BUTTONS Home Pressing the Home button will display the Main Menu in the control window from any position in the menu hierarchy. Previous The Previous button allows a return to the last menu that was changed. Up to 20 changed menus may be retraced using this function. Return The Return button will allow access to the previously selected upper-level menu. Scroll & Adjust LED s Note that the spinwheel will only be operative when the Scroll green LED is illuminated, indicating that a menu with more than four text lines is being displayed. Operating the spinwheel then allows the other text lines to be displayed. When illuminated the Adjust LED indicates that parameters of the selected module may be adjusted. Note that if the unit loses power at any time all settings will be restored to the values at power-down when power is restored. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.4

21 SECTION 4 Operation MAIN MENU DETAILS The main menu is located in the control display window and is the highest level menu from which various sub-menus may be selected using the adjacent push buttons. Selections available from this menu are as follows: Input This selection reveals the Input Menu and allows one of three types of input signals to be activated. Ana_A Ana_B Selects Composite input A Selects Composite input B Setup This selection reveals the Setup Menu which allows various signal parameters to be adjusted using the spinwheel. Numerical parameters are shown in the display window and a preset function returns the value to the default setting. Gain Chroma Gain This selection allows adjustment of overall video gain. Adjustment is in steps of 1% and preset value is 100%. This selection allows adjustment of overall Chroma gain. Adjustment is in steps of 1% and preset value is 100%. TPG Selects the the pattern enabled via the TPG item in the main menu (see TPG below) Hue This selection allows adjustment of the hue or colour tint of the picture. Adjustment range is from -180 to +179 in steps of 1 and preset value is 0. Output This selection reveals the Output Menu and allows various options to be applied to the output signals. Signal Loss Clipper On From a sub-menu the output can be frozen or cut to black when the input signal is lost Applies the clipping function to the output signals Output EDH On Adds EDH data to the output signal Input Set-Up Picture Pos This selection reveals a sub-menu that allows the unit to correctly process input signals that have or have not, a black level set-up. Note: NTSC signals originated in the USA normally have set-up; NTSC signals originating in Japan normally do not have set-up. The horizontal picture position (within blanking) may be adjusted using this function. Adjustment is in steps of 4 ns and preset value is 0 ns. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.5

22 SECTION 4 Operation Blanking This selection reveals the Blanking sub-menu that allows picture blanking to be adjusted. Using both the Front Porch and Back Porch controls allows the blanking position and width to be adjusted by setting independant start and finish points. It should be noted that these controls will not allow blanking to exceed the limits for valid D1 signals. Control Functions Front Porch Back Porch The width of the front porch may be adjusted in 148 ns steps. Preset value is 1333 ns. The width of the back porch may be adjusted in 148 ns steps. Preset value is 4741 ns. Blank/Pass All Vertical These functions allow all vertical interval lines to be either blanked or passed through. Field 1, Field 2 This reveals another sub-menu for selecting particular lines in the vertical interval of field 1 or field 2 that may be blanked or unblanked. Field 1 Any lines in the range 10 to 20 may be selected to be blanked (text highlighted) or unblanked (text normal) Field 2 Any of the lines in the range 272 to 282 may be selected to be blanked or unblanked. Analogue Using this function adjustments may be made to the analogue signal that is fed to the A to D converter to normalise the signal ensuring correct A to D conversion. Fast Lock Analog Gain This enables the time constant in the analogue PLL to be changed. The default setting is ON (text highlighted) which selects a short time constant. Setting to OFF selects a long time constant; this setting should only be used when the analogue input signal is guaranteed to stable and free of any timebase errors etc. This allows the gain, and hence the amplitude of the analogue signal to be adjusted. The gain may be adjusted in steps of 1 unit. Factory Defaults This function allows all control settings to be reset to factory default values. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.6

23 SECTION 4 Operation TPG This selection reveals the TPG Menu and allows either patterns or ITS to be applied to the outputs. Selecting ITS allows ITS to be added (text highlighted) or removed from the output signals. When the TPG selection is made the pattern that is currently selected (see below) will appear at the output. Selecting Patterns reveals a list of patterns that may be enabled for display: Black NTC7-1 FCC-MBST FCC-COMP NTC7-2 CB100 SMPTE SDI VALIDRMP P&B2T Genlock This selection reveals the Genlock Menu which allows the reference input to be selected and phasing adjustments to be made. Reference This selection reveals the Reference sub-menu that allows a particular reference signal to be selected. The output signals will then be locked to that signal. Reference Input This selection will lock the unit to the signal connected to the rear panel reference input. Horizontal/Vertical These selections allow the phasing between the reference signal and the output signal to be adjusted. Horizontal Vertical This selection allows the horizontal phasing to be adjusted in steps of 37 ns. Preset value is 0 ns. This selection allows the vertical phasing to be adjusted by ±262 lines in steps of 1 line. Preset value is 0. Status This selection reveals the Status Menu and allows the following modes to be enabled: Unit Name The unit name of MD500S will be displayed in the window and the text may be edited as follows: When the item is selected, the first character will be in reversed flashing text; this character can then be changed by rotating the spinwheel. When the desired character is found the button to the left or right of the text line should be pressed and the next text character will be highlighted and available for changing. The buttons to the left and right of the text line may be used to select other characters. To save the new text, press the OK button. It should be noted that this is the only way to save the new text as any other button function will return to another menu without modifying the original text. Picture Input Freerun This selection will lock the unit to the picture input selected from the Input Menu. Note that to remove a character and leave a clear space in the text line the Clear function (above Preset) should be used. When this selection is made the output signals will be locked to the internal SPG of the unit. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.7

24 SECTION 4 Operation Logging If a logging device is attached to the RollCall network, certain information may be made available for logging. Setting the destination address The destination for the delay information is set by the network code address as follows: Selections are: Log Inputs Log Ref Log Std Log Faults Server Logs input source selection Logs reference source selection Logs Operating standard Logs fault data Selecting RollTrack Event provides numerical display that allows up to 10 (0 to 9) audio delays to be selected (using the spinwheel) as a destination. Selecting RollTrack Unit allows the code to be set up (using the spinwheel) to edit the text. The full network address has six sets of numbers The first set (0000) is the network segment code number This item allows logging server communication functions to be setup and naming of the server. Logging Off Logging To Server Logging Any Server Logs off the server Logs onto a server Logs onto any server The item Server Name reveals a menu that allows the server name to be changed. RollTrack This function allows the value of the delay time produced by this module to be sent, via the RollCall network, to audio delay units connected on the same network. This enables compatible audio delay units to produce an audio delay dependent on this and other similar units. The audio delay unit will dynamically follow or track the received delay-time information allowing processed video signals to be timed correctly with audio signals. This automatic tracking system via the RollCall network is called RollTrack. (The spinwheel selects the character; the clear button removes a character and leaves a clear space, the Preset function sets the text line to all zeros, and the OK function accepts the network address) The second set is the number identifying the Unit address (enclosure/mainframe) The third set is the Port (slot number) in the unit. The fourth set is the (Virtual) channel number. Note that only channel numbers 14, 15, 16 & 17 should be used for audio delay cards. The fifth set is the Unit Identification. The sixth set In the event of a failure (loss of input, loss of power etc.) an instruction may be sent to a remote unit to switch the transmissiom output to a caption/picture such as "Normal service wil be resumed as soon as possible" The sixth set of 2 digits can be used to issue this instruction. Once a destination address for a unit has been set the OK function will save the data. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.8

25 SECTION 4 Operation RollTrack Mode This sub-menu allows the unit to provide the following information to the connected RollTrack Unit: Not Used No information will be sent to the RollTrack unit Delay The MDD500S delay time will be sent to the RollTrack unit Input Loss If the input signal to the MDD500S is lost this information will be sent to the RollTrack unit so that appropriate action may be taken. Recall Setup Selecting this function will reveal the Recall menu; press the push button adjacent to the desired memory location number. The settings saved at that location will then be loaded into the unit. Factory Defaults This function allows all control settings to be reset to factory default values. Reboot This function allows the unit to reboot and all power-up settings to be enabled. This is an easier method than switching the mains power on and off Input Restore When the input signal to the MDD500S is restored this information will be sent to the RollTrack unit so that appropriate action may be taken. The sixth set of digits (00) will indicate these states. Version This reveals the software version installed. Press OK to return to previous menu. Serial No This reveals the serial number of the card. Press OK to return to previous menu. Save Setup The MDD500S contains a non-volatile memory that can store all settings in 8 memory locations. Selecting this function will display the Save Setup menu. A memory location may then be selected by pressing the button adjacent to the desired location and the settings will be saved in that location. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.9

26 SECTION 4 Operation CARD EDGE CONTROLS Adjustment of the settings for the MDD500S is available either via card edge controls or via the RollCall remote control system. Front Panel Connector The front panel is connected to the card via this 9-pin connector. SW1 and SW2 These push-button switches allow parameters (as selected by SW3) to be adjusted. SW1 increases values and SW2 decreases values. To return to default values both buttons should be pressed simultaneously. SW3 Position 0 The input gain may be adjusted in this position. Adjustment is in steps of 1% and preset value is 100%. SW3 Position 1 The chrominance gain may be adjusted in this position. Adjustment is in steps of 1% and preset value is 100%. SW3 Position 2 This position has no function SW3 Position 3 This position allows the front porch to be adjusted.the width of the front porch may be adjusted in 148 ns steps. Preset value is 1333 ns. SW3 Position 4 This position allows the back porch to be adjusted. The width of the back porch may be adjusted in 148 ns steps. Preset value is 4741 ns MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.10

27 SECTION 4 Operation SW3 Position 5 This position has no function SW3 Position 6 In this position the vertical phasing or offset between the reference signal and the output signal may be adjusted. Adjustment range is ±262 lines in steps of 1 line. Preset value is 0. SW3 Position 7 In this position the horizontal phasing or offset between the reference signal and the output signal may be adjusted. Adjustment is in steps of 37 ns. Preset value is 0 ns. SW3 Position 8 Note that this position is only operative when TSG is selected to output (SW5 position 3 set to ON) This position allows a test pattern to be selected from the list of patterns. SW3 Position 9 This position allows adjustment of the hue or colour tint of the picture. Adjustment range is from -180 to +179 in steps of 1 and preset value is 0 SW3 Position A The horizontal picture position (within blanking) may be adjusted from this position. Adjustment is in steps of 4 ns and preset value is 0 ns. SW3 Positions B to E These positions are reserved SW3 Position F In this position operating the push buttons will set all controls to their factory default values. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.11

28 SECTION 4 Operation LED INDICATORS D1 (SOIRX) This indicator will flash when RS422 data is being received from the remote control port. D2 (SIOTX) This indicator will flash when RS422 data is being transmitted to the remote control port. D3 (DAT2) This indicator will flash when network data is being received from the RollCall remote control port. D4 (DAT1) This indicator will flash when network data is being transmitted to the RollCall remote control port. D5, D6, D7 & D8 These indicate that the -6 V, +5 V, +6 V and -5 V power supplies are present. D9 (INPUT) This indicator is non-operational D10 (REF) This indicator is non-operational D11 (ERROR) This indicator is non-operational D12 (EDH) This indicator will flash when EDH errors are detected D13 (SCL) and D14 (SDA) These are internal status indicators D15 (ILF) This indicator will flash if an internal load fault is detected; continious illumination indicates a faulty unit. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.12

29 SECTION 4 Operation SW5 and SW6 The two 8-way DIL switches allow various functions to be set when an active front panel is not fitted. Note that when an active front panel is fitted most switch settings will be reflected by the front panel menu display or indicators. SWITCH SW5 (UP = OFF, DOWN = ON) Position 1 This position has no function Position 2 Input Type Select Analogue A is selected in the UP (Off) position Analogue B is selected in the DOWN (On) position Position 3 Normal/Pattern Select In the OFF position the unit will process the input signal; in the ON position a test pattern will be displayed. The type of test pattern may be selected from the front panel menu or by setting SW3 to position 8. Position 4 VITS Operation In the OFF position the will be no VITS insertion; in the ON position VITS signals will be inserted. Position 6 Test In the OFF position the unit operates normally; in the ON position a test mode is enabled. Positions 7 This position has no function. Position 5 Select Output Signal Type This position has no function Position 8 This position selects the settings read at power-up. In the ON position the stored settings are read and implemented at power-up; in the OFF position the switch/default settings are read and implemented at power-up MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.13

30 SECTION 4 Operation SW6 (UP = OFF, DOWN = ON) Position 1 Input Signal Set-Up This switch should be set to the OFF position if the input signal has set-up (e.g. NTSC USA); it should be set to the ON position if the input signal does not have set-up (e.g. NTSC Japan) Position 2 This poition has no function Position 3 This poition has no function Position 4 Vertical Blanking In the OFF position all lines during vertical blanking are blanked; in the ON position all lines are passed through. Positions 5 & 6 These two positions allow the reference source to be selected. ( 0=OFF, 1=ON and X=Don t Care) Reference Source Position 5 Position 6 Freerun 0 0 Picture Input 0 1 Reference Input 1 X Position 7 Setting this to ON applies the clipping function to the output signal. Clipping levels are at peak white, black and 100% chrominance. Position 8 has no function SW7 and SW8 These two switches enable the RollCall network address to be set. SW7 sets the MSB (most significant bit) and SW8 sets the LSB (least significant bit) Both of these switches are used to define the Unit Address code for the equipment. They are only read at power-up. Position 0 on SW7 will disable the RollCall function on the unit; all other positions on these switches may be used to set the Unit Address code in Hex. (SW7 in the range 1 to f, SW8 in the range 0 to f) If a code is already in use the RollCall receive and transmit LED s will flash alternately at a 1 second rate. The unit must then be powered-down, the code reset and the unit powered-up again. Note that in a RollCallsegment, all units must have different unit address codes. MDD500S Version 1 Issue 2 SNELL & WILCOX For software V1.4.2 onwards 4.14

31 SECTION 5 Appendix 1 PROPOSED SMPTE STANDARD FOR FAULT REPORTING SMPTE269M IN TELEVISION SYSTEMS Copyright, Society of Motion Picture and Television Engineers. Reprinted by permission. 1 SCOPE This standard describes a simple interface over which television equipment can report the occurrence of internal failures and faults in incoming signals. It is intended for use in all television equipment, from the simplest active device to the most complex. The interface consists of an isolated closure which can assume one of three states: open, closed or pulsing. These respectively signal that the reporting device is okay, has detected an internal fault, or is detecting incoming signal faults. Fault occurrence data may be collected from equipment complying with this standard by several means, ranging from simple "follow the lights to the trouble" summary alarm schemes to computerised logging systems. While full specification of such systems is beyond the scope of this standard, a general outline of one possible implementation is given in annex A. 2 NORMATIVE REFERENCE The following standard contains provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. IEC (1978), R.F. Coaxial Connectors with Inner Diameter of Outer Conductor 6.5 mm (0.256 in) with Bayonet Lock - Characteristic Impedance 50 Ohms (Type BNC) 3 FAULT STATES 3.1 A reporting device may be one of three states: Normal operation The device is currently not detecting any internal failures and is receiving power Internal failure The device is currently detecting an internal failure or has lost power Incoming signal fault The device is not detecting any internal failures, but is currently detecting fault in incoming signal(s). MDD500S Version 1 Issue 1 SNELL & WILCOX 5.1

32 SECTION 5 Appendix 1 4 INTERFACE DEFINITION 4.1 Interface The interface consists of two-wire connection from an electrically-isolated output closure in the reporting device. The interface reports faults only at the times that they are detected. The closure may be in one of three states: Open An open output signifies that the reporting device is operating correctly with valid input(s) Closed A closed output signifies that the reporting device has detected an internal fault or has lost power. The closure last s only for the duration of the fault Pulsing A pulsing output signifies that the reporting device has detected errors in the signal(s) it is receiving. The pulsing lasts only for the duration of the errored field(s). 4.2 Pulsing Pulsing is defined as a closed pulse from 1-2 ms long occurring once per field. 5 ELECTRICAL CHARACTERISTICS 5.1 Output The output of the reporting device is a closure, electrically isolated from the rest of the device. The isolating mechanism shall withstand a common-mode potential of 60 V peak at frequencies from DC to 400 Hz. The shell of the connector may be bypassed to the chassis by a small-value capacitor, if needed, to limit rf radiation. 5.2 Output closure The output closure must be in the closed state when power is removed from the device (see annex A). 5.3 Open state characteristics When in the open state, the leakage across the closure must be less than 100 ua at any voltage from 0V to 5 V DC. The closure shall be able to withstand 24 V DC in the open state without damage. 5.4 Closed-state characteristics In the closed state, the maximum voltage drop across the closure shall not exceed 2V at 20mA. The sensing device shall not supply more than 20mA of current to the reporting device. MDD500S Version 1 Issue 1 SNELL & WILCOX 5.2

33 SECTION 5 Appendix 1 6 CONNECTOR The chassis connector used shall be a female BNC type, as defined in IEC The center contact shall be connected to the positive side of the sensing mechanism. Note - Only the mechanical dimensions are specified. Both 50- and 75-ohm connectors are available which meet these requirements. ANNEX A (informative) Possible implementation of a reporting scheme There are many ways to implement a fault data collection and reporting system using the interface specified in this standard. The implementation described here is one of the simplest. It is a hierarchical system and is designed to lead a technician to the faulty device by means of visual and audible signals. No provision is made for automated logging of faults; however, such logging is not precluded. The scheme works as follows: All fault reporting outputs in each rack or frame are connected in parallel to a summary alarm repeater, which consists of a power supply, an optoisolator circuit, and an alarm lamp and driver, as shown in figure A V 2 OUTPUT 3 INPUTS N ALARM LAMP Figure A.1.-Reporting Scheme Implementation The outputs of the repeaters are connected in parallel to an identical repeater at the end of the rack row. These in turn are connected to another repeater at the entrance to the rack area, and so forth, until all alarms are summed at a staffed monitoring point. Audible alarms may also be used where desired. When an alarm occurs, the technician simply follows the lights to the correct room, rack area, rack row, rack, frame, and faulty module, and either resets or replaces it as required. Note that this scheme relies on the device originally reporting the fault to provide visual indication of the fault condition. Schemes of this type have been used by telephone companies for years. They are simple to design and inexpensive to implement. Although they do not provide detailed fault logging, as noted, they greatly facilitate locating failures. MDD500S Version 1 Issue 1 SNELL & WILCOX 5.3

34 SECTION 5 Appendix 1 ANNEX B (informative) Output loss detection The requirement to signal loss of power as a fault implies that the output must revert to the closed state when the power is off. Figure B.1 shows one possible implementation of such a circuit. +V OUTPUT FAULT Figure B.1.-Output Interface Implementation ANNEX C (informative) Output loss detection Normal analog video system design practice is to have all outputs of a device driven by the same active components, with the different outputs isolated from each other by buildout resistors. With this arrangement, one can determine the condition of all outputs of the device with a high degree of confidence by monitoring only one of them. In digital television systems, the bandwidths involved make commonly-driven resistively-isolated outputs impractical. Instead, each output is typically driven by a separate active stage, and noise considerations frequently dictate that half the output drivers are fed from the Q output of the previous stage, while the other half are fed by the not-q output. Given this topology, monitoring one output of a device does not indicate the health of the other outputs to the degree of confidence required. The only way to provide this level of confidence is for the device itself to monitor all outputs internally, signalling a fault if any of them fails while the device is receiving or generating a valid input. ANNEX D (informative) Bibliography SMPTE 259M, Television--10-bit 4:2:2 Component and 4 fsc NTSC Composite Digital Signals -- Serial Digital Interface SMPTE RP165, Error Detection Checkwords and Status Flags for Use in Bit-Serial Digital Interfaces for Television. MDD500S Version 1 Issue 1 SNELL & WILCOX 5.4

35 SECTION 5 Appendix 2 PROPOSED SMPTE RECOMMENDED PRACTICE RP165 Error Detection Checkwords and Status Flags for Use in Bit-Serial Digital Interfaces for Television Copyright, Society of Motion Picture and Television Engineers. Reprinted by permission. 1 SCOPE 1.1 This practice describes the generation of error detection checkwords and related status flags to be used optionally in conjunction with the serial digital interface for system M (525/59.94) and systems B, G, H and I (625/50) digital television equipment operating with either 4:2:2 component digital signals of 4fsc composite digital signals. Although it is preferred that this error checking method be used in all serial transmitters and receivers, it is recognised that some equipment must minimise complexity. NOTE - Line numbers in tables 2 and 3 for 625/50 systems are tentative, and subject to change pending decisions on vertical interval switching for serial signals. 1.2 Two checkwords are defined: one based on a field of active picture samples and the other on a full field of samples. This two-word approach provides continuing error detection for the active picture when the digital signal has passed through processing equipment that has changed data outside the active picture area without re-calculating the full-field checkword. 1.3 Three sets of flags are provided to feed forward information regarding detected errors to help facilitate identification of faulty equipment. One set of flags is associated with each of the two field related checkwords. A third set of flags is used to provide similar information based on evaluating all of the ancillary data checksums within a field. 1.4 The checkwords and flags are combined in an error data packet which is included as ancillary data i the serial digital signal. At the receiver, a recalculation of checkwords may be compared to the error data packet information to determine if a transmission error occurred. MDD500S Version 1 Issue 1 SNELL & WILCOX 5.5

36 SECTION 5 Appendix 2 2 NORMATIVE REFERENCES The following standards contain provisions which, through reference in this text, constitute provisions of this practice. At the time of publication, the editions indicated were valid. All standards re subject to revision, and parties to agreements based on this practice are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below: ANSI/SMPTE 125M-1992, Television - Component Video Signal 4:2:2 - Bit-Parallel Digital Interface SMPTE 244M, Television - System M/NTSC Composite Video Signals - Bit-Parallel Digital Interface SMPTE 259m, Television - 10-Bit 4:2:2 Component and 4fsc NTSC Composite Digital Signals - Serial Digital Interface SMPTE RP 168, Definition Of Vertical Interval Switching Point for Synchronous Video Switching ICE 60B(Sec)200, Helical-Scan Digital Composite Video Cassette Recording Using 19mm Magnetic Tape (Format D-2) (NTSC, PAL), Section Five, Video Interface EBU Tech E, Parallel Interface for 625-Line Digital Video Signals MDD500S Version 1 Issue 1 SNELL & WILCOX 5.6

37 SECTION 5 Appendix 2 3 LOCATION OF CHECKWORDS, FLAGS, AND INCLUDED SAMPLES 3.1 Location of Checkwords and Flags Digital data packets containing the calculated checkwords and error information flags are located in the ancillary data area of the vertical interval in a manner to complement the recommended practice of source switching. Locations are shown graphically in figure 1 and specified in table 1 for 525/59.94 systems and table 2 for 625/50 systems. For composite signals, the error data packet is located in the ancillary data area of the first horizontal pulse occurring in the line prior to the recommended vertical interval switching point of each field. For component signals, the error data packet is located just prior to SAV (start of video) in the same lines. To enable proper operation of equipment implementing this practice, signal switching must take place in the vertical interval and conform to SMPTE RP 168. Vertical Blanking Interval ccc fff (Line n with last full-field sample) (Line n+1 with error data packet) (Line n+2 used for switching) (Line n+3 not included in full-field sample) (Line n+4 first full-field sample) eef aaa (Line with first active picture sample) H-interval Samples not contained in Active Picture Area (see 3.2 for definition) active picture checkword (Line with last active picture sample) eea NOTES 1 See Tables 1 and 2 for exact sample locations in both fields. 2 ccc = location of checkwords and status flags 3 fff = first sample included in the full-field checkword 4 aaa = first sample included in the full-field checkword 5 eea = last sample included in the active picture checkword. 6 eef = last sample included in the full-field checkword Figure 1-Location of Checkwords and Included Samples MDD500S Version 1 Issue 1 SNELL & WILCOX 5.7

38 SECTION 5 Appendix 2 Table 1-Location of 525/59.94 System Checkwords Data Item Composite Component Error checking data locations Line 9 fields 1 & 111, Line 272,fields 11 &1V Ancillary data header, word 1 - component Ancillary data header, word 2 - component Ancillary data header, word 3 - component Auxiliary data flag - composite Data ID Block number Data Count Active picture data word 0 Active picture data word 1 Active picture data word 2 Full-field data word 0 Full-field data word 1 Full-field data word 2 Ancillary data error flags Active picture error flags Full-field error flags Reserved words (7 total) Checksum for this ancillary data block 795 (3FCh) 796 (1F4h) 797 (200h) 798 (110h) (200h) (000h) 1690 (3FFh) 1691 (3FFh 1692 (1F4h) 1693 (200h) 1694 (110h) (200h) 1711 MDD500S Version 1 Issue 1 SNELL & WILCOX 5.8

39 SECTION 5 Appendix 2 Table 2 - Location of 625/50 System Checkwords Data item Composite Component Error checking data locations: Line (5) fields 1 & 111, Line (318), fields 11&1V Ancillary data header, word 1 - component Ancillary data header, word 2 - component Ancillary data header, word 3 - component Auxiliary data flag - composite Data ID Block number Data count Active picture data word 0 Active picture data word 1 Active picture data word 2 Full field data word 0 Full field data word 1 Full field data word 2 Ancillary data error flags Active picture error flag Full field error flags Reserved words (7 total) Checksum for this ancillary data block 972 (3FCh) 973 (1F4h) 974 (200h) 975 (110h) (200h) 992 Cr425(3FFh) Y851 (3FFh) Cb 426 (1F4h) Y852 (200h) Cr426 (110h) Y853 Cb427 Y854 Cr427 Y855 Cb428 Y856 Cr428 Y857 Cb429-Cr430 (200h) Y861 NOTES 1 Values in the tables are word numbers for the appropriate standard. 2 Values in parentheses are sample values /50 line numbers (in brackets) are tentative. MDD500S Version 1 Issue 1 SNELL & WILCOX 5.9