Snell & Wilcox MDD550-70, MDD550-50, MDD550-60 Operator's Manual

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MDD550011298 Version 1 Issue 2

0.1

Operator’s

Manual

Snell & Wilcox

MDD550

Series of Decoders -50,-60,-70

Transit Protection-Important Notice

REMOVING THE TRANSIT TIE-WRAPS

When supplied the PCB car d will be secured by 2 tie- wraps, looped around the card eject ors and through 2 holes in the base plate. B efore ins talling t he rack bot h of t he t ie-wraps s hould be r emoved by cut ting off the tie-wrap knot and com pletely removing the tie-wrap.

REPLACING T HE TRANSIT TI E - WRAPS

Before shipping, t he trans it t ie-wraps s hould be replaced wit h the spare tie-wraps supplied (part no. RMW610). With the unit free-standing ensure that the PCB card is pushed fully home using the card ejectors. From the inside of the unit, feed the tongue of the tie-wrap behind the card ejector and through the base plate using the rear of the 2 holes. F rom t he outs ide, f eed the tongue back thr ough the base plate using the other hole, past the front of the card ejector, feed t hrough t he eye of t he tie- wrap, pull tight and cut of f the excess.

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 connection and having a neutral connection which can be reliably identified.

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 1.7.2 and

2.6.9, the power outlet suppling power to the unit should be close to the unit and easily accessible.

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.

Warnings

Voltages within this unit can be l ethal under certain cir cumstances. 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.

MDD550011298 Version 1 Issue 2 Software Version 1.3.1 onwards 0.2

EMC Standards

This unit has been designed to conform to the following standards:

Electromagnetic Compatibility-Generic Immunity Standard BS EN 50082-1:1992

The European Standard EN 50082-1:1992 has the status of a British Standard and is related to European Council Directive 89/336/EEC dated 3rd May 1989.

Electromagnetic Compatibility-Generic Emission Standard BS EN 50081-1:1992

The European Standard EN 50081-1:1992 has the status of a British Standard and is related to European Council Directive 89/336/EEC dated 3rd May 1989.

Safety Standards

This unit conforms to EN60950:1992 as ammended by ammendment A1(May 1993) and ammendment A2(March 19 94). Specifi cation for sa fety of techn ology equip ment, 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 cabl es 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 s hell. The c able screen shall hav e 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.

MDD550011298 Version 1 Issue 2 Software Version 1.3.1 onwards 0.3

Table of Contents

SECTION

1 Introduction

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2

Operational Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3

2 Specifications

Input Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1

Output Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2

3 Installation

Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1

Communication Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2

Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3

Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4

4 Operation

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1

Operation using Card Edge Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2

Menu 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 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: * MDD550 series Decoder

* Power cable

* Operator’s Handbook

MDD550011298 Version 1 Issue 2 Software Version 1.3.1 onwards 0.4

Manual 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 onwards 0.5

Operator’s Manual

Snell

Wilcox

MDD550

Series

MDD550-50 MDD550-60

and

MDD550-

Operator’s

Manual

Snell & Wilcox

MDD550

Series of Decoders

Covering MDD550-50, MDD550-60 and MDD550-70

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

PbYPr

Pb/B

Y/G

Sync

REFERENCE

SERIAL

COMPOSITE

INPUT

AAB

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

SECTION 1

Introduction

FEATURES

NTSC, PAL and Multi-Standard versions 4fsc to 4:2:2 bridge Sophisticated adaptive, multi-tap vertical-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 filtering RollCall control protocol with built-in gateway to RS422

MDD550050398 Version 1 Issue 1 Software Version 1.3.1 onwards 1.2

SECTION 1

Introduction

All 10-bit digital design

OPERATIONAL BLOCK DIAGRAM

MDD550050398 Version 1 Issue 1 Software Version 1.3.1 onwards 1.3

INPUT SIGNALS

Reference Standard Video or black burst via loop-through BNC connectors for 75 Ohms. Serial Two inputs (A and B ) for Serial Digital via loop-through BNC connectors for 75

Ohms. Input return loss better than -15 dB @ 270 MHz An input equaliser contains an automatic equaliser allowing input cable lengths of up to 150 m when high quality cable is used.

Parallel One input for parallel composite digital video via DB25 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 connectors for

connection to 75 Ohms systems. Output level 800 mV ±10% Output return loss better than -15 dB @ 270 MHz

Note that to ensure reliable transmission of serial digital signals without causing unacceptable levels of radiated emissi ons, only high quality 75 Ohm co-axial cable should be used. The cable must also be terminated with a precision 75 Ohm load.

SECTION 2

Specifications

MDD550050398 Software Version 1.3.1 onwards 2.1

SIGNAL PATH Digital Input One parallel digital composite i nput via 25 way DB connector in accordance

with SMPTE 244M (110 Ohm ±10 Ohms) Two serial inputs for 143 Mbs/177Mbs composite digital video data in

accordance with SMPTE 259M-A via passive loop-through BNC connectors for 75 Ohms. Return loss better than -15 dB to 270 MHz at all times (active or inactive)

Reference Input 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.

RollCall Input One input via BNC connector for 75 Ohms. For connection to RollCall network Rate Conversion 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.

Synchroniser A full 10-bit digital frame synchroniser 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 functions are available from card edge switches with modes of

operation indicated by LED’s. Full control is via the optional front panel or by using RollCall which can control

the unit from a P.C. or a remote front panel.

Digital Output 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.

Power Requirements 90 V to 250 V 50/60Hz A.C. IEC Socket Fused 1A(T)

(Note that EN60950 clause 1.4.5 requires safe operation taking into account a tolerance of +6% to -10% on this voltage range) Power Consumption 50VA maximum

Temperature Range 0 to 40°C operating (Unit incorporates a cooling fan) Mechanical 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

SECTION 2

Specifications

MDD550050398 Software Version 1.3.1 onwards 2.2

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.

POWER INDICATOR The green LED indicator on the front panel marked

POWER will be illuminated when the unit is powered-up.

Fuse

WER

4V(AC) Hz0.6A

E1A(T)

SECTION 3

Installation

MDD550050398 Software Version 1.3.1 onwards 3.1

COMMUNICATIONS CONNECTIONS

CONTROL RS422

This 9 pin ‘D’ connector on the rear panel is the RS422 control connector. Connections are as follows:

Pin 1 Ground Pin 2 Transmit TXA Pin 3 Receive RXB Pin 4 Common (Transmit Signal) Pin 5 Ground Pin 6 Common (Receive Signal) Pin 7 Transmit TXB Pin 8 Receive RXA 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

connected to the RollCall network communications system. For more details of the Ro llCall system see Section 1

PANEL ROLLCALL

CONTROL

SERIAL

LOOP

REMOTE

SECTION 3

Installation

SERIAL OUTPUT

CONTROL

COMP

PYP

Y/G

RS422

ROLLCALL

CONTROL

MDD550050398 Software Version 1.3.1 onwards 3.2

INPUT CONNECTIONS

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 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 Ohm terminating plug should be fitted on the unused connector. Nominal input level is 1V p-p.

Either A or B input may be selected using the card edge controls or via the RollCall remote control system.

PARALLEL INPUT This is the parallel composite digital video input to the

unit via a 25 way ‘D’ type connector (DB25)

SERIAL

LOOP

SECTION 3

Installation

REFERENCE

INPUT

COMPOSITE PARALLEL

MDD550050398 Software Version 1.3.1 onwards 3.3

OUTPUT CONNECTIONS

SERIAL OUTPUTS There are four outputs of Serial digital video available

from the unit via these BNC connectors for 75 Ohms.

Note that the following connectors have no function 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 PAR ALLEL

SERIAL OUTPUT

CONTROL

COMPONENT O UTPUT

YPr

Pb/B

Y/G

Syn

REFERENCE

SERIAL

COMPOSITE

INPUT

AAB

LOOP

REMOTE

Pr/R

RS422

SERIAL OUTPUT

MDD550050398 Software Version 1.3.1 onwards 3.4

GENERAL INFORMATION

The MDD550 series may be controlled by means of a card edge controls 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 units may be controlled.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.1

OPERATION USING CARD EDGE CONTROLS

Adjustment of the settings for the MDD550 series 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 range is from 0% to 117% in steps of 1% and preset value is 100%.

SW3 Position 1 The chrominance gain may be adjusted in this

position. Adjustment range is from 0% to 200% in steps of 1% and preset value is 100%.

SW3 Position 2 This position is not used SW3 Position 3 This position allows the front porch to be adjusted.

In NTSC mode the width may be adjusted in 148 ns steps. Prese t v al u e i s 133 3 ns . In PAL mode the width may be adju sted in 148 ns steps. Prese t v al u e i s 133 3 ns .

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.2

SW3 Position 4 This position allows the back porch to be adjusted.

In NTSC mode the width of the back porch may be adjusted in 148 ns steps. Preset value is 4741 ns. In PAL mode the width of the back porch may be adjusted in 148 ns steps. Preset value is 5630 ns.

SW3 Position 5 This position is not used SW3 Position 6 In this position the vertical phasing or offset between

the reference signal and the output signal may be adjusted.

In NTSC mode this selection allows the vertical phasing to be adjusted by ±262 lines in steps of 1 line. Preset value is 0. In PAL mode this selection allows the vertical phasing to be adjusted by ±312 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.

In NTSC mode this selection allows the horizontal phasing to be adjusted in steps of 37 ns. Preset value is 0 ns. In PAL mode this selection allows the horizontal phasing to be adjusted in steps of 37 ns. Preset value is 0 ns.

SW3 Position 8 This position is not used SW3 Position 9

(Only available in NTSC mode)

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. The adjustment 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.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.3

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 bei ng

received from the RollCall remote control port. D4 (DAT1) This indicator will flash when network data is bei ng

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 will illuminate if the input is present. D10 (REF) This indicator will illuminate if the reference signal is

present. D11 (ERROR) This indicator will illuminate if an error is detected

e.g. selected input is missing or selected reference is missing or the wrong standard.

D12 (EDH) This indicator is non-operational. 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.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.4

SW4 This Hex switch allows various decoder c omb modes

to be selected. Position 0: Studio 1 This mode should be used for most stable studio signal

sources Position 1: Studio 2

This mode should be used for ‘non-sports’ type material.

Position 2: Studio 3

(Only available in NTSC Mode)

This mode should be used for "real life" type pictures e.g. sports etc. Use this mode as a starting point.

Position 3: Mindel This mode produces the minimum input/output delay

(approx 3 lines) 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 best results with sources that contain

no motion. e.g. Rostrum cameras and still graphics. Position 7: Simple1 This simple decode mode incorporates a wide

bandwidth subcarrier notch filter. Position 8: Simple2 This simple decode mode incorporates a narrow

bandwidth subcarrier notch filter. Position 9: Line This is a classical line comb with no adaption. Positions A to F are reserved; do not use.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.5

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) Positions 1 & 2 Input Type Select Used with SW6 position 3

(Note 0=OFF, 1=ON X=Don’t Care)

Input SW5 Pos 1 SW5 pos 2 SW6 pos 3 Digital A X 0 0 Digital B X 1 0

Parallel X X 1

Position 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 mode is enabled. Positions 7 This position has no function. Position 8 If this switch is in the OFFposition the unit will power-up

to the conditions set by switches SW4, SW5 and SW6. Control Panels (Front+RollCall or Remote) will not connect to the unit.

If this switch is ON the unit will power up as last configured. Both Front and Remote control panels may connect and control it.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.6

SW6 (UP = OFF, DOWN = ON) Position 1 Input Signal Set-Up

(Only available in NTSC mode)

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 position is not used Position 3

See SW5 positions 1 and 2

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 s ource 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 ar e at peak white, black and 100% chrominance.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.7

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 RollCallsegment, all units must have different unit address codes.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.8

MDD550050398 Software Version 1.3.1 onwards 4.9

OPERATION FROM AN ACTIVE FRONT PANEL (Optional) 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 sel ecti ons made by rotating a spi nwheel and press ing 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 ‘MDD550 series Menu System’ drawing opposite) 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 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 only be operative when the LED labelled ADJUST 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.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.10

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.

Output...

Setup...

Status...

Input...

Comb... Genlock...

MDD550-x ref: OK Inp: OK NTSC ref: Pic

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.11

ACTIVE FRONT PANEL PUSH BUTTONS

Home

Pressing the Home button will display the Main Menu in the control window from any position in the menu hierarchy.

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.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.12

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 types of input signals to be activated.

Dig_A Selects Digital input A Dig_B Selects Digital input B Parallel Selects the Composite Digital

Parallel input

Comb

This selection reveals the Comb Menu and allows one of six types of comb filtering sy stems to be appl ied to the signal.

Studio 1 This mode should be used for most

stable studio signal sources

Studio 2 This mode should be used for

‘non-sports’ type material.

Studio 3 (Only available in NTSC Mode)

This mode should be used for "real life" type pictures e.g. sports etc. Use this mode as a starting point.

MinDelay This mode produces the minimum

input/output delay (approx 3 lines) and may be used where audio delay problems may exist and cannot be compensated for.

Still This mode gives best results with

sources that contain no motion. e.g. Rostrum cameras and 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 is a classical line comb with no

adaption

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.

Picture Input This selection will lock the unit to the

picture input selected from the Input

Menu. Freerun When this selection is made the output signals will be

locked to the internal SPG of the unit. Horizontal/Vertical These selections allow the phasing between the

reference signal and the output signal to be adjusted. Horizontal This selection allows the horizontal

phasing to be adjusted in steps of

37 ns.

Preset value is 0 ns. Vertical This selection allows the vertical

phasing to be adjusted by ±262 lines

(NTSC) or ± 312 lines (PAL) in steps

of 1 line.

Preset value is 0.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.13

Output

This selection reveals the Output Menu Signal Loss Selecting this function reveals a sub-menu that allows

the action taken when the input signal is lost, to be changed.

Freeze on Signal Loss The output will be a frozen picture.

Black on Signal Loss

The output will cut to black

Clipper On This applies the clipping function to

the output signal. Clipping levels are at peak white, black and 100% chrominance.

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 This selection allows adjustment of

overall video gain. Adjustment 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 is 100%.

Hue (Only available in NTSC Mode)

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°

Input Set-Up (Only available in NTSC Mode)

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 i n the

USA normally have set-up; NTSC

signals originating in Japan nor mally

do not have set-up.

Picture Pos The horizontal picture position

(within blanking) may be adjusted

from this position.

The adjustment is in steps of 4 ns and

preset value is 0 ns.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.14

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 This allows the front porch to be

adjusted. The width may be adjusted in 148 ns steps. Prese t v al u e i s 133 3 ns .

Back Porch This allows allows the back porch to

be adjusted. In NTSC mode the width of the back porch may be adjusted in 148 ns steps. Preset value is 4741 ns. In PAL mode the width of the back porch 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 blanked or unblanked.

Field 1 Any lines in the range 10 to 20 (NTSC)

or 7 to 22 (PAL) may be selected to

be blanked (text highlighted) or

unblanked (text normal) Field 2 Any of the lines in the range 272 to

282 (NTSC) or 320 to 335 (PAL) may

be selected to be blanked or

unblanked.

Operating Modes

This function allows the decode standard to be set. The unit may be forced to decode in either PAL or NTSC by making the appropriate selection; when Auto is selected the unit will detect the signal standard and automatically decode in that standard.

Factory Defaults

Selecting this function sets all parameters to factory set default settings.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.15

Status

This selection reveals the Status Menu and allows the following modes to be enabled:

Unit Name The unit name of MDD550 will be displayed in the

window and the text may be edited as follows: When the item is selected, the first character of 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.

Note that to remove a character and leave a clear space in the text line the Clear function (above Preset) should be used.

Logging If a logging device is attached to the RollCall

network, certain information may be made available for logging.

The first item in the Logging sub-menu is ‘Input State’ This selection allows information about the state of the input to be logged.

The second item ‘Ref State’ allows information about the state of the reference input to be logged.

The third item ‘Server Name’ reveals a menu that allows the server name to be changed.

Version This reveals the software version install ed. Press OK

to return to previous menu. Serial No This reveals the serial number of the unit. Press OK to

return to previous menu.

SECTION 4

Operation

MDD550050398 Software Version 1.3.1 onwards 4.16

Snell & Wilcox MDD550-70, MDD550-50, MDD550-60 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual