pro bel VISTEK V1667 User Manual Download Page 3

Page: 3 / 19

VISTEK V1667, V1667/SY & V1667/SY-VHS
12-bit pal/ntsc to sdi adaptive
comb filter decoder

HU-V1667&SY&SY-VHS

8.4

An Introduction to Vislock Processing........................................................ 18

8.4.1

What is VisLock? ................................................................................ 18

8.4.2

How does it work?............................................................................... 18

8.4.3

Does the added data degrade my picture? ......................................... 19

8.4.4

Will digital equipment in the path pass the VisLock signal?................ 19

8.4.5

How is VisLock Implemented? ............................................................ 19

Summary of Contents for VISTEK V1667

Page 1: ...1 VISTEK V1667 V1667 SY V1667 SY VHS 12 BIT PAL NTSC TO SDI ADAPTIVE COMB FILTER DECODER USER GUIDE www pro bel com...

Page 2: ...or 9 4 3 Video Standard Indicators Selection of Video Standard 9 4 4 Parameter Indicators and Adjustment 9 4 5 Remote Local Switch 10 5 TIMING PAGE FRAME SYNCHRONISER 11 5 1 Timing Page Entry 11 5 2 T...

Page 3: ...decoder HU V1667 SY SY VHS 3 8 4 An Introduction to Vislock Processing 18 8 4 1 What is VisLock 18 8 4 2 How does it work 18 8 4 3 Does the added data degrade my picture 19 8 4 4 Will digital equipme...

Page 4: ...f the standard synchroniser module but also offers the facility to decode non timebase corrected signals specifically the output of a VHS tape recorder VisLock processing may be optionally factory fit...

Page 5: ...utput 1 SDI Output 4 Looping Input BNC Connector Input Output Description Comments SD IN SDI Output 1 Cable drive length up to 200 metres SD 1 OUT SDI Output 2 Cable drive length up to 200 metres SD 2...

Page 6: ...hen the Frame Synchroniser option is fitted there is a TTL output signal to indicate the amount of extra delay inserted above the minimum as specified for the unit The signal has a constant period of...

Page 7: ...hown above Commonly used controls are directly available whilst the less used ones are protected from inadvertent use The panel uses the concept of Pages and Parameters Within each Page there are a po...

Page 8: ...ment Top Page Page 1 SIG Page 2 TIM Page 3 ANC ENG A Standard V Timing NTSC type B Video Gain H Timing Vertical interval C Chroma Gain Sync I P fail mode VisLock1 D Phase Minimum delay Delay line PAL...

Page 9: ...cted standard LED when in force mode When in automatic mode the AUTO LED will flash and none of the standard LEDs will be illuminated 4 4 Parameter Indicators and Adjustment There are five parameters...

Page 10: ...200 Cal 100 Resolution 0 2 steps Min 0 Demodulation phase Phase may be adjusted either side of the calibration position by using the Up and Down buttons and Phase adj Max 45 Cal 0 Resolution 0 3 steps...

Page 11: ...et Selection of the parameter to be adjusted is made by repeatedly pressing the Select button until the relevant green parameter LED is illuminated Then use the Up and Down buttons to adjust the chose...

Page 12: ...timing parameters may be reset to their respective normalised positions by following the procedure described below 1 Select the Timing Reset parameter 2 Depress the Up and Down buttons simultaneously...

Page 13: ...fault 625 Default 525 C ON OFF VisLock processing enabled VisLock processing disabled Default 2 D ON OFF Adaptive delay line PAL Simple PAL Default all PAL standards Default all other standards E ON O...

Page 14: ...elect button followed by the Down button The decoder will exit the Engineering Page immediately and resume normal front panel operation If the unit is left in the engineering page for more than five m...

Page 15: ...tputs 4 Format EBU Tech 3267 ANSI SMPTE T14 22 082 Data rate 270 Mb s Connector BNC Impedance 75 Return loss 15dB 5 270MHz Amplitude 800mV p p terminated DC offset 0V 0 5V Rise and fall times 0 75 1 5...

Page 16: ...put VR4 Luminance gain alignment 625 input Note The table above is included for information only Users are strongly advised not to adjust these components as to do so may mis align the related functio...

Page 17: ...Furthermore DEC 2 has been configured to apply automatic gain control Video AGC and automatic chrominance gain control ACGC to the input signal as the output from a typical VHS recorder can vary grea...

Page 18: ...signal to serial digital form then subsequently re converting back to NTSC with negligible loss of picture quality This enables digital and analogue plant to be mixed in a high quality installation 8...

Page 19: ...nal digital video plant including switchers routers synchronisers audio embedders and de embedders caption and logo inserters etc Certain equipment such as standards converters and effects generators...