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17

Installation

Gain Control

The front of module gain control can be adjusted via two methods
both of which require a known input level. One method requires
the use of a known calibrated digital waveform monitor to
observe the serial digital output. An alternate method requires the
use of an oscilloscope to observe a calibration adjustment
waveform generated by the 8301A-K.

To adjust the gain control with a calibrated waveform monitor the
key video source should be set to produce a full level output. If the
key video source has black level setup, the input format switch
should be placed in Position 7 and the black level control must be
adjusted first to correctly set the black level as observed on the
waveform monitor Y channel. The gain control is then adjusted to
produce correct peak white level as observed on the waveform
monitor. If the key signal does not contain setup, the input format
switch should be placed in Position 6 and only the gain control
need be adjusted to correctly set the white level as observed on the
waveform monitor Y channel.

Use of the calibration waveform created by the 8301A-K to adjust
gain has the advantage that calibrated external equipment is not
required. The calibration waveform created by the module
contains digitally-generated reference levels which makes
accurate gain calibration of the oscilloscope used unimportant. A
100% level input is required. Two front-of-module test points are
provided to allow adjustment of the gain and (optionally) black
level controls to create a correct digital output level. The rising
edge of the waveform at TRIGGER test point TP1 can be used as
an oscilloscope trigger source. The waveform at GAIN CAL test
point TP24 should be observed on the oscilloscope at a sweep
speed of 20µs/div and a gain of 500mV/div.

The calibration waveform consists of a four video line sequence. It
starts with a line which contains the upper 1/4 of the 10 bit Y
channel dynamic range and a 100% peak reference level. The next
two lines are unused for the 8301A-K version of the module. A
fourth line contains the lower 1/4 of the Y channel 10 bit dynamic
range and a black reference level. This fourth line does not need to
be observed unless the key input video has black level setup.

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Содержание SMS 8301A-K

Страница 1: ...SMS 8301A K KEY TO SERIAL COMPONENT DIGITAL C ONVER TER Instruction Manual TP3507 01 FIRST PRINTNG AUGUST 1993 REVISED PRINTNG APRIL 1998 ...

Страница 2: ...ents issued and pending Product options and specifications subject to change without notice The information in this manual is furnished for informational use only is sub ject to change without notice and should not be construed as a commitment by Grass Valley Group Grass Valley Group assumes no responsibility or liability for any errors or inaccuracies that may appear in this publication Region Vo...

Страница 3: ...Part 15 Information xii 89 336 EEC EMC Directive xii SMS 8301A K Key to Serial Component Digital Converter Introduction 1 Function 2 Signal Processing 4 Timing and Control 5 Specifications 6 Installation 8 Module Configuration 8 Vertical Blanking Width Selection 9 8 10 Bit Output Selection 10 Internal External Sync Selection 11 External Sync Source 12 Module Installation 13 Rear Connectors 14 Inpu...

Страница 4: ...ut Format 16 Black Level Control 16 Gain Control 17 Ref Present LED 19 Module Alignment 20 Alignment Equipment 20 Free Run Frequency Adjustment 21 Frequency Response Adjustment 22 Key Video In H Phase Adjustment 22 Service 24 Index ...

Страница 5: ... Figure 3 JP101 Jumper Settings 10 Figure 4 JP103 Jumper Settings 11 Figure 5 JP900 Jumper Settings 12 Figure 6 8301A K Rear Connector Overlay 14 Figure 7 8301A K Front Panel 15 Figure 8 8301A K Calibration Waveform 18 Figure 9 JP103 Jumper Settings 21 Figure 10 JP103 and JP200 Shorting Jumpers 23 ...

Страница 6: ...vi Contents List of Tables Table 1 Format Selection 16 ...

Страница 7: ...or enclosure are for use by qualified service 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 Symbols and Their Meanings in This Manual The lightning flash with arrowhead symbol within an equilateral triangle alerts the user to the presence of dangerous voltage within the prod...

Страница 8: ...epresents a protective grounding terminal Such a terminal must be connected to earth ground prior to making any other connections to the equipment The fuse symbol indicates that the fuse referenced in text must be replaced with one having the ratings indicated ...

Страница 9: ...ions and components while power is on Do not wear hand jewelry or watches when troubleshooting high current circuits such as the power supplies During installation do not use the door handles or front panels to lift the equipment as they may open abruptly and injure you To avoid fire hazard use only the replacement parts with specified correct type voltage and current rating as referenced in the a...

Страница 10: ... only as described in the manual To prevent equipment damage select the proper line voltage at the AC input connector as described in the installation documentation Ensure that the two power supply cords are each plugged into a separate branch circuit in case one circuit should fail Circuit boards in this product are densely populated with surface mount and ASIC components Special tools and techni...

Страница 11: ...are color coded white neutral black line and green or green yellow ground Operation of this equipment at voltages exceeding 130 VAC will require power supply cords which comply with NEMA configurations International Power Supply Cord This equipment is supplied with a molded grounding receptacle IEC 320 C13 at one end and stripped conductor 50 5 mm at the other end Conductors are CEE color coded li...

Страница 12: ... the following two conditions 1 This device may not cause harmful interference 2 This device must accept any interference received including interference that may cause undesirable operations 89 336 EEC EMC Directive EN500081 1 EN55022 WARNING This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measur...

Страница 13: ...g video Key Signal input 525 or 625 line and converts it to the Y channel of an 8 or 10 bit 270 Mb s serial component digital signal per SMPTE 259M EBU Tech 3267 standard 8301A K features are Automatically selects between 525 and 625 lines 525 625 Line Standard Sense Output Gain Calibration Display Ten Bit A D Conversion Selectable Ten Bit Output or Dynamic Rounding to 8 Bits Oversampling A D Conv...

Страница 14: ... 1 while reading the pages that follow Figure 1 8301A K Block Diagram Key External Reference Input Analog Processing and Filtering A D Converter and Digital Filter Key Input Amplifiers and Reference Selector Sync Separator Reference Vertical Detector Ref Video Sync Lock Phase Error Detector Ref Horiz Timing and Control Signal Processing Freq Control Key Local Horizontal Timing ...

Страница 15: ...y Delay Calibration Display Generator Blanking Gate Limiter and Rounder Key Calibration Display Test Point 27 MHz and 13 5 MHz Clocks Horiz Timing Signals 525 625 Control Vertical Timing Signals Y Chroma CCIR 601 Encoder CCIR Scrambler and Serializer 601 Serial Digital Outputs Freq Control Format Select Switch System Control Micro Controller System Control Outputs Chroma Channel Data Fixed at Zero...

Страница 16: ...n an oscilloscope connected at the module front panel The resulting display shows the key signal peak white and black levels and calibration markers for each The Blanking Gate Limiter and Rounder receives delayed Key Y data and a chroma channel data input corresponding to zero color It rounds 10 bit input data to 8 bits if required and adds digital blanking level data as required The CCIR601 Encod...

Страница 17: ... the Ref Sync Presence Detector and the Vert ical Timing Generator and Auto Standard Logic circuit blocks The 27MHz VCXO generates the master clock for the video A D converter The Horizontal Timing Generator generates a horizontal rate square wave which drives the previously mentioned Lock Phase Error Detector to create a phase error voltage Freq Control which controls the 27MHz VCXO The resulting...

Страница 18: ...by on board jumper to select external timing reference External Reference Input External Reference Selections Available Selection of frame reference or individual module reference 75Ω terminating Input Signal Type Color Black Return Loss 40dB to 5 0MHz Level 300mV sync 6dB Timing Within 2µS of video input Output Signal Type Serial component digital conforming to proposed SMPTE standard 259M and EB...

Страница 19: ...vided to compensate for 2µS with respect to video input Coarse control 8 steps of 296nS Fine control range 400nS Vertical Blanking Width 525 selectable 9 lines Narrow or 19 lines Wide 625 selectable 9 lines Narrow or 25 lines Wide Electrical Length 5 05µS Standards Selection Automatic 525 625 Black Level Accuracy Maintained to full 10 bit by drift free digital clamp Front of module black level tri...

Страница 20: ...Installation Rear Connector Front Panel Controls Displays Module Configuration When installing the 8301A K module check and or set the following four jumpers Vertical Blanking Width Selection Jumper JP1 8 10 bit Output Selection Jumper JP101 Internal External Sync Selection Jumper JP103 External Sync Source Jumper JP900 ...

Страница 21: ...ection JP1 selects between Narrow or Wide of vertical blanking width when operating in the 525 or 625 line standard See Figure 2 below for the location and settings of JP1 Figure 2 JP1 Jumper Settings JP1 NARROW WIDE NARROW WIDE 8301A K OR JP1 ...

Страница 22: ...l Converter 8 10 Bit Output Selection JP101 selects between 10 bit or rounded to 8 bit serial data outputs Figure 3 illustrates the location and settings for JP101 Figure 3 JP101 Jumper Settings OR JP101 10 BITS 8 BITS JP101 10 BITS 8 BITS 8301A K ...

Страница 23: ...osition If the source does not have sync present an external reference input is required and JP103 must be placed in the EXT REF position NOTE The external reference input can be used even though the key input has sync present if desired Figure 4 illustrates the location and settings for JP103 Figure 4 JP103 Jumper Settings OR JP103 EXT REF G INPUT JP103 EXT REF G INPUT 8301A K ...

Страница 24: ... Ref position If a common reference can be used for all modules in the frame which require a reference JP900 should be placed in Position A Alternately if a separate reference is required JP900 should be placed in Position B For example if modules needing 525 and 625 line standard references are both present in a single frame position B should be used on modules needing the alternate sync source F...

Страница 25: ...e into the frame so that the left and right edges of the module slide inward between the card guides 2 Press the front panel retaining ejecting tab in to lock the module in place 3 Additional information concerning the frame and power supply installation is located in the SMS 8000 Frame and Power Supply Manual part number TP3465 ...

Страница 26: ...outputs The sixth BNC is a reference input The 9 pin D connector provides Remote interface Ensure that the rear connector overlay on the rear of the frame is in the correct location Figure 6 illustrates the 8301A K rear connector overlay Figure 6 8301A K Rear Connector Overlay Remote 9 pin D connector J7 provides an output at pin 8 which will indicate if the module is operating in 525 or 625 line ...

Страница 27: ...el consists of three trim pots an eight position rotary switch two positions are used for the 8301A K a sixteen position rotary switch a Reference Present LED and 6 test points 2 GND GAIN CAL TRIGGER 5V and 5V The front panel is illustrated in Figure 7 Figure 7 8301A K Front Panel 5V GND 5V GND GAIN CAL TRIGGER SMS 8301A K KEY A D PRESENT REF INPUT FORMAT BLACK 6 NO SETUP 7 SETUP 0 1 2 3 4 5 6 7 8...

Страница 28: ...up If the input has setup present Position 7 should be used Black Level Control If Input Format Switch Position 7 is used the black level control will be operational This control compensates for possible incorrect setup level on the video input The output Y channel black level will be held fixed by a digital clamp when using Input Format Position 6 and the control will not function Table 1 Format ...

Страница 29: ...served on the waveform monitor Y channel Use of the calibration waveform created by the 8301A K to adjust gain has the advantage that calibrated external equipment is not required The calibration waveform created by the module contains digitally generated reference levels which makes accurate gain calibration of the oscilloscope used unimportant A 100 level input is required Two front of module te...

Страница 30: ...etup can thus be adjusted to make the video peak levels match as closely as possible the appropriate reference level Refer to Figure 8 for a typical gain calibration waveform Figure 8 8301A K Calibration Waveform Waveforms Shown for 100 Level Input Reference Level Reference Level Level Varies as Gain is Adjusted Ref Level Varies as Black Level is Adjusted Lower Limit of Cal WFM Range Fixed Ref Ful...

Страница 31: ...These controls must be adjusted to correctly position the output with respect to the digital timing information added by the module The position can be observed either with a digital waveform monitor or with a serial digital to analog converter feeding a picture monitor Ref Present LED An LED is provided to indicate when a reference signal is present ...

Страница 32: ... requires no adjustments in the field If adjustments are necessary they should be attempted only by qualified technicians using at a minimum the following equipment or equivalents Tektronix GVP Deserializer M9103 Tektronix 2465B Oscilloscope HP 5384A Frequency Counter Test signal generator Tektronix TSG 300 Digital signal analyzer Viewtronics LTD DIGIVIEW NOTE SMS 8000 Series extender module assem...

Страница 33: ...3 Set Jumper JP103 in the G INPUT position if it is not already in that position Refer to Figure 9 below for jumper location 4 Observe frequency at test connector P500 pin 12 end pin near TP18 with frequency counter 5 Adjust R960 for a frequency of 13 5MHz 25Hz 6 When calibration is complete set JP103 in the previous position if it was moved Figure 9 JP103 Jumper Settings OR JP103 EXT REF G INPUT ...

Страница 34: ...ng of the modules EAV SAV digital timing reference output and digital H blanking Follow the steps listed below 1 Connect video input signal with sync to module key input 2 Remove shorting jumper on JP103 and short all three pins together using a small piece of wire Refer to Figure 10 for jumper location 3 Force the digital clamp to operate at mid scale by shorting all six pins of JP200 together wi...

Страница 35: ...23 Module Alignment 7 Replace the shorting jumper on JP103 that was previously removed Figure 10 JP103 and JP200 Shorting Jumpers JP103 EXT REF G INPUT JP200 8301A K ...

Страница 36: ...ting correctly proceed as follows Check input signals Check cables and connections Check switch positions on front panel Verify source equipment is operating correctly Check output connections If the module is still not operating correctly replace it with a known good spare and return the faulty module to a designated Tektronix Grass Valley Products repair depot Call your Tektronix Grass Valley Pr...

Страница 37: ...tions 7 External Reference Input Specifications 6 External Sync Source 12 F FCC Part 68 xiv Format Selection Table 16 Frame Ground Connections 14 Free Run Frequency Adjustment 21 Frequency Response Adjustment 22 Front Panel 15 Front Panel Controls Displays 15 G Gain Control 17 H H Timing Controls 19 Horizontal Timing Generator 5 I Illustration 8301A K Calibration Waveform 18 8301A K Front Panel 15...

Страница 38: ... 5 Module Alignment 20 Module Configuration 8 Module Installation 13 O Output Specifications 6 Outputs 14 Serial Digital 14 P Q Part 68 xiv Performance Specifications 7 R Rear Connectors 14 Ref Present LED 19 Reference Sync 19 Reference Vertical Detecto 5 Remote 14 S S100 Switch 16 Scrambler 4 Serializer 4 Service 24 Specifications Component Analog Video Input 6 Environmental Power 7 External Refe...

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