Snell & Wilcox MDD550-50 Operator'S Manual Download Page 7

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SECTION 1

Introduction

DESCRIPTION

The MDD550 series are composite video decoders
which have an adaptive multi-dimensional filter which
can work across 5 fields or in a minimum delay mode.

The MDD550 series comprise:

MDD550-50

NTSC Decoder

MDD550-60

PAL Decoder

MDD550-70

Multi-standard Decoder

Fuse

PANEL

ROLLCALL

CONTROL

EDH

COMPOSITE PARALLEL

SERIAL OUTPUT

CONTROL

COMPONENT OUTPUT

Pb/B

Y/G

Sync

REFERENCE

SERIAL

COMPOSITE

INPUT

LOOP

REMOTE

Pr/R

RS422

POWER

88-264V(AC)
50/60Hz0.6A

FUSE1A(T)

The units are contained in a single 1U rack case,
meeting current EMC regulations (BS EN 50081-1 for
emission and BS EN 50082-1 for immunity)

Control is via card edge controls or by using the
RollCall



remote control system.

MDD550050398 Version 1 Issue 1

Software Version 1.3.1 onwards 1.1

Summary of Contents for MDD550-50

Page 1: ...e tie wraps should be removed by cutting off the tie wrap knot and completely removing the tie wrap REPLACING THE TRANSIT TIE WRAPS Before shipping the transit tie wraps should be replaced with the sp...

Page 2: ...e 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 GREE...

Page 3: ...n 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 b...

Page 4: ...System Diagram 4 9 Operation from an active front panel 4 10 Active Front Panel Push Buttons 4 12 Menu Details 4 13 Packing List The unit is supplied in a dedicated packing carton provided by the man...

Page 5: ...Revision Record Date Version No Issue No Change Comments 050398 1 1 First Issue for MDD550 series 011298 1 2 UL data added New manual issued MDD550011298 Version 1 Issue 2 Software Version 1 3 1 onwar...

Page 6: ...Operator s Manual Snell Wilcox MDD550 Series MDD550 50 MDD550 60 and MDD550 70 Operator s Manual Snell Wilcox MDD550 Series of Decoders Covering MDD550 50 MDD550 60 and MDD550 70...

Page 7: ...ANEL ROLLCALL CONTROL EDH COMPOSITE PARALLEL SERIAL OUTPUT CONTROL COMPONENT OUTPUT Pb Y Pr Pb B Y G Sync 3 2 1 REFERENCE SERIAL COMPOSITE INPUT A A B LOOP REMOTE Pr R RS422 4 POWER 88 264V AC 50 60Hz...

Page 8: ...ical temporal separation filter Two 4fsc SMPTE 259 looped inputs One Parallel 4fsc input Four Rec656 4 2 2 outputs Synchronise frame operation Output may be locked to input High quality Digital filter...

Page 9: ...SECTION 1 Introduction All 10 bit digital design OPERATIONAL BLOCK DIAGRAM MDD550050398 Version 1 Issue 1 Software Version 1 3 1 onwards 1 3...

Page 10: ...25 connector Terminated in 110 Ohms 10 Ohms 10 m maximum cable length using shielded multi core cable OUTPUT SIGNALS Serial Digital Four isolated serial digital outputs are available via BNC connector...

Page 11: ...hroniser is incorporated into the main signal processing path The output of the synchroniser may be locked to the input video the reference video or allowed to free run Control Limited control functio...

Page 12: ...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 POWER INDICATOR The green LED indicator on the f...

Page 13: ...A Pin 9 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 c...

Page 14: ...with the operating standard of the unit SERIAL These are the two Serial Digital video inputs to the unit via loop through BNC connectors for 75 Ohms If the loop through facility is not used a BNC 75...

Page 15: ...ion on this unit and connections should not be made to them COMPOSITE A B EDH COMPONENT OUTPUT Y Pb Pr Sync Y G Pb G Pr R SECTION 3 Installation PANEL ROLLCALL CONTROL EDH COMPOSITE PARALLEL SERIAL OU...

Page 16: ...located behind the hinged front panel from a suitable active remote front panel or via a computer interface Remote control is also available via a wired network system called RollCall and several uni...

Page 17: ...ld be pressed simultaneously SW3 Position 0 The input gain may be adjusted in this position Adjustment range is from 0 to 117 in steps of 1 and preset value is 100 SW3 Position 1 The chrominance gain...

Page 18: ...asing or offset between the reference signal and the output signal may be adjusted In NTSC mode this selection allows the horizontal phasing to be adjusted in steps of 37 ns Preset value is 0 ns In PA...

Page 19: ...ese indicate that the 6 V 5 V 6 V and 5 V power supplies are present D9 INPUT This indicator will illuminate if the input is present D10 REF This indicator will illuminate if the reference signal is p...

Page 20: ...es and may be used where audio delay problems may exist and cannot be compensated for Position 4 This position has no function Position 5 This position has no function Position 6 Still This mode gives...

Page 21: ...osition 3 This position is not used Position 4 This position is not used Position 5 This position is not used Position 6 Test In the OFF position the unit operates normally in the ON position a test m...

Page 22: ...on 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 t...

Page 23: ...ll 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...

Page 24: ...MDD550050398 Software Version 1 3 1 onwards 4 9...

Page 25: ...put output standard selections of the unit and information messages The highest level menu is called the Main Menu and contains the names of the lower level menus which may be scrolled through using t...

Page 26: ...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 Outpu...

Page 27: ...e 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 tha...

Page 28: ...d still graphics Simple1 This simple decode mode incorporates a wide bandwidth subcarrier notch filter Simple2 This simple decode mode incorporates a narrow bandwidth subcarrier notch filter Line This...

Page 29: ...stment range is from 0 to 117 in steps of 1 and preset value is 100 Chroma Gain This selection allows adjustment of overall Chroma gain Adjustment range is from 0 to 200 in steps of 1 and preset value...

Page 30: ...ch may be adjusted in 148 ns steps Preset value is 5630 ns 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 blank...

Page 31: ...the new text as any other button function will return to another menu without modifying the original text Note that to remove a character and leave a clear space in the text line the Clear function ab...

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