Crystal Vision DEC102S User manual

Crystal Vision Ltd., Lion Technology Park, Station Road East, Whittlesford, Cambridge, CB22 4WL, England.
E-mail: [email protected] Website: www.crystalvision.tv Tel: [phone] Fax: [phone]
DEC102S
Composite or Y/C to SDI decoder

DEC102SUser ManualV1.0 Crystal Vision
1DEC102SUser ManualV1.0 05/11/03
Contents
1 Introduction 3
Operating modes 4
Output timing 4
Audio follow pulse 4
Manual scope 4
2Statesman 5
2.1 Installing Statesman 5
2.2 Statesman operation 6
Configuration 7
Gain, black level and phase adjustment 9
Timing adjustment 10
3 Using the front control panel 13
The DEC102S menu structure 16
Selecting video standard and decoder modes 17
Setting gain and black level 19
Adjusting signal timing 21
4 Card edge operation 23
Card edge controls 23
Displaying module type and firmware 23
Setting video standard and decoder options 24
Setting gain and black level 26
Adjusting signal timing 27
Setting 525 (NTSC) Setup 29
Restoring factory defaults 29

DEC102SUser ManualV1.0 Crystal Vision
2DEC102SUser ManualV1.0 05/11/03
5 Hardware installation 31
5.1 Rear modules and signal I/O 31
RM01 31
RM02 32
RM18 33
5.2 FR1-6, FR2-12 and FR2-8 frame rear connectors 34
FR1-6 & FR2-12 connections 34
FR2-8 connections 34
5.3 Module configuration 35
Loop or terminate the external reference 35
Card-edge control - video standard and 8/10 bit jumper location 35
Setting node addresses 36
6 Trouble shooting 37
Card edge monitoring 37
Fault finding guide 37
7 Specification 39

Crystal Vision Introduction
3DEC102SUser ManualV1.0 05/11/03
1 Introduction
The DEC102S is an analogue composite or Y/C to serial digital video decoder. It contains
a 10-bit synchroniser allowing the serial digital output to be timed to an analogue
reference.
Two main operating modes are supported, 10-bit for professional quality PAL or NTSC
video and 8-bit for less stable PAL or NTSC video, as is often the case with VHS or
satellite feeds.
The decoder is fitted with a line based adaptive comb. It is also designed to accommodate
jittery or damaged signals and will automatically switch to its tolerant 8-bit decoder mode
when a non-stable signal is received.
The main features are as follows:
•compact single height module
•converts any composite or Y/C signal to SDI
•frame synchroniser
•10-bit adaptive comb plus 8-bit input modes
•automatic or manual PAL/NTSC standard selection
•adjustable timing, gain and black level
•audio follow pulse for audio to video delay tracking
•loop or terminate external analogue video reference input
•card edge, Statesman and remote control facilities
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The DEC102S analogue composite or Y/C to serial digital video decoder

Crystal Vision Introduction
4DEC102SUser ManualV1.0 05/11/03
The DEC102S is a 100mm x 266mm module, which fits in the all standard frames and
can be integrated with any boards from the company’s full product range. It uses the
single height RM01, double height RM18 and triple height RM02 rear connectors in
Indigo and other Crystal Vision frames.
Operating modes
To provide optimum performance with a wide range of sources the DEC102S can operate
in a number of different modes.
10-bit input modes Description
10-bit Comb PAL/NTSC
composite
Uses a line-based comb decoder, which mixes to simple decoder
when the comb would produce artefacts.
10-bit Y/C (S-video) Suitable for use with well-timed sources.
8-bit composite
8-bit Y/C (S-video)
All 8-bit modes use a robust simple decoder. These highly tolerant
modes are particularly suitable for use with poorly timed sources
such as VHS recorders or satellite feeds.
Each operating mode has its own luminance and chrominance gain, offset and phase
settings and both 525 and 625 line standards have separate horizontal and vertical timing
settings. All these parameters are automatically maintained when power is cycled.
Output timing
Horizontal and vertical timing adjustments are provided that operate relative to one of
three analogue timing references. These are an external reference, the video input or an
internal free-running clock. The external reference can be video or composite syncs
although a composite black and burst plus 300mV syncs into 75 Ohm as per EBU N14-
1988 is preferred.
If no analogue reference is provided the board will either time itself relative to the
composite or Y/C video input in 10 bit modes, or it will time its output to a free running
clock in 8 bit modes.
A horizontal offset delay adjustment varies the timing of the input video relative to input
syncs and blanking in 10-bit mode whichever source is the active reference.
Audio follow pulse
To allow an audio delay to track the delay through the DEC102S, a TTL level pulse is
provided. This pulse is output every frame. The length of the pulse (the time between the
rising and falling edge) is the same as the delay through the synchroniser.
Manual scope
This manual refers to module firmware version 6.86 or later.