GRASS VALLEY SMS 8301A User manual

SMS 8301A
COMPONENT ANALOG VIDEO TO SERIAL DIGITAL CONVERTER
Instruction Manual
TP3473-01
FIRST PRINTNG: AUGUST 1995
REVISED PRINTNG: DECEMBER1997

Contacting Grass Valley Group
Copyright © Grass Valley Group. All rights reserved.
This document may not be copied, in whole or in part, or otherwise reproduced,
except as specifically permitted under U.S. copyright law, without the prior written
consent of Grass Valley Group, P.O. Box 599000, Nevada City, CA 95959-7900 USA.
GRASS VALLEY GROUP is a registered trademark and Grass Valley is a trademark of
Grass Valley Group. All registered trademarks and trademarks are property of their
respective holders. Grass Valley Group products are covered by U.S. and foreign pat-
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 Voice Fax Address Web Site
North America [phone]
530-478-4148 [phone] Grass Valley Group P.O. Box 599000
Nevada City, CA 95959-7900 USA
www.grassvalleygroup.com
Pacific Operations [phone]
Support: 852-2585-6579 [phone]
U.K., Europe, Asia,
Middle East [phone] [phone]
France [phone]
Germany [phone] [phone]

iii
Important Safeguards and Notices
Symbols and Their Meanings in This Manual . . . . . . . . . . . . . . . . . . . . . . vii
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Power Supply Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
North American Power Supply Cord . . . . . . . . . . . . . . . . . . . . . . . . . . xi
International Power Supply Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
EMC Regulatory Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Federal Communications Commission
(FCC) Part 15 Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
89/336/EEC EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
SMS 8301A Component Analog Video 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
MII/BETA Format Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 11
GBR Format Internal/External Sync Selection . . . . . . . . . . . . . . 12
Chroma Filter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
External Sync Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Rear Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Contents
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iv
Contents
Front Panel Controls/Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Input Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Y Black Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Gain Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ref Present LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Module Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Alignment Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Free Run Frequency Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Frequency Response Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Y/G Ref H Phase Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1
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v
Contents
List of Illustrations
Figure 1. 8301A Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 2. JP1 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 3. JP101 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4. JP102 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. JP103 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. JP600 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. JP900 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8. 8301A Rear Connector Overlay . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 9. 8301A Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 10. 8301A Calibration Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 11. JP103 Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 12. JP103 and JP200 Shorting Jumpers . . . . . . . . . . . . . . . . . . . . . . . 26
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vi
Contents
List of Tables
Table 1. Format Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 2. Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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vii
Important Safeguards and Notices
Information on the following pages provides important safety
guidelines for both Operator and Service Personnel. Specific
warnings and cautions will be found throughout the manual
where they apply, but may not appear here. Please read and
follow the important safety information, noting especially those
instructions related to risk of fire, electric shock or injury to
persons.
WARNING
Any instructions in this manual that require opening the equipment
cover 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 product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle alerts the
user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the
equipment.
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viii
Section — Important Safeguards and Notices
This symbol represents 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.
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ix
Warnings
Warnings
■
Heed all warnings on the unit and in the operating
instructions.
■
Do not use this product in or near water.
■
Disconnect AC power before installing any options.
■
This product is grounded through the grounding conductor
of the power cord. To avoid electrical shock, plug the power
cord into a properly wired receptacle before connecting the
product inputs or outputs.
■
Route power cords and other cables so that they are not likely
to be damaged.
■
Disconnect power before cleaning. Do not use liquid or
aerosol cleaners; use only a damp cloth.
■
Dangerous voltages exist at several points in this product. To
avoid personal injury, do not touch exposed connections 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 appropriate parts list for this product.
Always refer fuse replacement to qualified service personnel.
■
To avoid explosion, do not operate this product in an
explosive atmosphere unless it has been specifically certified
for such operation.
■
Have qualified personnel perform safety checks after any
completed service.
■
If equipped with redundant power, this unit has two power
cords. To reduce the risk of electric shock, disconnect both
power supply cords before servicing.
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x
Section — Important Safeguards and Notices
Cautions
■
To prevent damage to equipment when replacing fuses, locate
and correct the trouble that caused the fuse to blow before
applying power.
■
Verify that all power supply lights are off before removing
power supply or servicing equipment.
■
Use only specified replacement parts.
■
Follow static precautions at all times when handling this
equipment.
■
Leave the back of the frame clear for air exhaust cooling and
to allow room for cabling. Slots and openings in the cabinet
are provided for ventilation. Do not block them.
■
The front door is part of the fire enclosure and should be kept
closed during normal operation.
■
This product should be powered 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
techniques are required to safely and effectively troubleshoot
and repair modules that use SMT or ASIC components. For
this reason, service and repair of Tektronix-GVP products
incorporating surface mount technology are supported only
on a module exchange basis. Customers should not attempt to
troubleshoot or repair modules that contain SMT or ASIC
components. Tektronix-GVP assumes no liability for damage
caused by unauthorized repairs. This applies to both in- and
out-of-warranty products.
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xi
Power Supply Cords
Power Supply Cords
There are two types of power supply cords available for the
SMS 8000 Series. Refer to one of the following, depending on the
location where the equipment will be used.
North American Power Supply Cord
This equipment is supplied with a molded grounding plug
(NEMA 5-15P) at one end and a molded grounding receptacle
(IEC 320-C13) at the other end. Conductors 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, light blue (neutral),
brown (line) and green/yellow (ground). Other IEC 320 C-13 type
power supply cords can be used if they comply with the safety
regulations of the country in which they are installed.
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xii
Section — Important Safeguards and Notices
EMC Regulatory Notices
Federal Communications Commission (FCC) Part 15 Information
This device complies with Part 15 of the FCC Rules. Operation is
subject to 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 measures.
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1
SMS 8301A Component Analog Video to
Serial Component Digital Converter
Introduction
The SMS 8000 product line consists of a 1RU frame which holds
up to 4 modules. The modules provide such functions as video
delay and format conversion. Modules are selected by the user to
suit their particular requirements.
The SMS 8301A CAV to Serial Component Digital Converter
Module accepts a component analog video (CAV) input (525 or
625 line) and converts it to an 8 or 10 bit 270 Mb/s serial
component digital signal per SMPTE 259M/EBU Tech 3267
standard.
8301A features are:
■
Automatically selects between 525 and 625 lines
■ Selectable Chroma Channel Bandwidth
■
Gain Calibration Display
■
Ten Bit A/D Conversion
■
Selectable Ten Bit Output or Dynamic Rounding to 8 Bits
■
Oversampling A/D Conversion
■
Input selectable MII, BETA, EBU N10, or GBR
■
Digital Filtering
■ Digital Clamping
■
525/625 Vertical Blanking Width (Narrow or Wide)
■
Selectable Internal or External Reference in GBR Mode
■
Remote Chroma Off Input
■
525/625 Line Standard Sense Output
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2
SMS 8301A Component Analog Video to Serial Component Digital Converter
Function
This description is divided into two sections:
■
Signal Processing
■
Timing and Control
Refer to block diagram Figure 1 while reading the pages that
follow.
Figure 1. 8301A Block Diagram
Y/G
B-Y/B
R-Y/R
External
Reference
Input
Analog
Processing
and Filtering
A/D Converter
and
Digital Filter
Y/G
B-Y/B
R-Y/R
Amplifiers
and
Reference
Selector
Sync
Separator
Reference
Vertical
Detector
Ref
Video
Sync
Lock Phase
Error
Detector
Ref
Horiz
Y/G
B-Y/B
R-Y/R
Digital Matrix
with
Bypass
Timing and Control
Signal Processing
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3
Function
27MHz VCXO
and
Divider
Horizontal
Timing
Generator
Vert Timing
Generator
and Auto
Standard Logic
Ref Sync
Presence
Detector Free Run
Control
Local Horizontal Timing
Ref Vertical
13.5 MHz 2H Clock
Y
Channel
Delay
Chroma
Channel
Lowpass Filter
Y
B-Y
R-Y
Calibration
Display
Generator
Blanking Gate
Limiter and
Rounder
Y
B-Y
R-Y
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
Remote
Monochrome
Control
System Control
Micro
Controller
System
Control
Outputs
347301A1.book Page 3 Thursday, November 2, 2000 10:41 AM

4
SMS 8301A Component Analog Video to Serial Component Digital Converter
Signal Processing
The three video input channels (Y/G, B-Y/B, R-Y/R) are passed
through Analog Processing and Filtering circuitry then applied to
the Analog–to–Digital Converter and Digital Filter block.
Three A/D converters sample the video at 27MHz and converts it
to 10–bit data.
In GBR input mode, the Digital Matrix combines the input
channels to produce color difference signals required by
downstream circuitry. If the input is already color difference, the
combining circuitry is bypassed. Out of the matrix, the B–Y and
R–Y channels are applied to the Chroma Channel Lowpass Filters;
the Y channel is applied to a delay circuit.
The digital filters lowpass filter the B–Y and R–Y channels. Two
filters alternately drive a common bus to create a multiplexed
chroma channel data stream.
The Y Channel Delay delays the Y signal to compensate for the
delay introduced into the B–Y and R–Y channels by the Chroma
Channel Lowpass Filters.
The Calibration Display Generator uses the delayed Y channel
and the multiplexed B–Y and R–Y channels to produce a signal
which can be observed on an oscilloscope connected at the
module front panel. The resulting display contains all three
channels and calibration markers for each.
The Blanking Gate, Limiter and Rounder receives delayed Y data
and the multiplexed B–Y, R–Y channel data. It rounds 11-bit input
data to 10 or 8 bits as required and adds digital blanking level data
as required.
The CCIR601 Encoder receives the Y and Chroma outputs of the
Blanking Gate, Limiter and Rounder and creates a SMPTE 125M/
CCIR601 format, parallel data output.
The Scrambler and Serializer receives the multiplexed CCIR601
(SMPTE 125M) data stream from the CCIR601 Encoder and
produces serial outputs conforming to the proposed SMPTE
259M/ EBU Tech 3267 standard.
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5
Function
Timing and Control
The Microcontroller interfaces between front panel controls and
the crosspoints and registers of the Digital Matrix and Blanking
Gate Limiter and Rounder circuits. The controller also configures
the chroma channel low pass filter ASICs and feeds registers
which determine the mix coefficients for the Digital Matrix.
The external and internal (G/Y) reference inputs are amplified
and then fed to a selector. The selected reference is low pass
filtered to remove burst (if the reference was color black) and fed
to a Sync Separator.
The Sync Separator extracts sync from the selected reference. A
Lock Phase Error Detector compares Local Horizontal Timing
with separated sync to create a phase error voltage.
Separated reference sync (Sync) also feeds a Reference Vertical
Detector which generates a reference vertical pulse (Ref Vertical)
to 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
converters. 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 phase-locked-loop locks the Horizontal Timing
Generator outputs and the clocks to the reference video
horizontal.
The Vertical Timing Generator receives a 2H clock and uses it to
create vertical frequency outputs. The Ref Vertical input is used to
set the phase of internal counters to phase the vertical blanking
and field outputs to the vertical reference. The circuit also
provides automatic 525/625 standard selection by comparing Ref
Vertical and internally generated timing pulses.
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6
SMS 8301A Component Analog Video to Serial Component Digital Converter
Specifications
Specifications are subject to change without prior notice.
Component Analog Video Input
Input Connectors 3 BNC terminating
Input Impedance 75 Ω nominal
Input Return Loss >40 dB to 5.5 MHz
Input Formats M
II
, BETA, SMPTE, EBU N10, GBR
Selection between US or Japan M
II
/BETA
External Reference Input (Selectable in GBR mode only)
External Reference
Selections Available Selection of frame reference or individual module reference (75 Ω 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 259M
/EBU Tech 3267 standard
Connectors Two (2) 75 Ω BNCs
Impedance 75 Ω
Return Loss >15 dB (5MHz to 270MHz)
Output DC Zero volts (ac coupled)
Performance
A to D Conversion Oversampled (27MHz) 10 bits
Output Data Bits Switchable between 10 or rounded to 8
Vernier Analog Gain
Control Provides compensation for analog inputs of ±1dB with respect to selected format nominal
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7
Specifications
Performance (Continued)
Frequency Response (Y) ±0.1dB to 6MHz ref 100 kHz
(CB/CR) ±0.1 dB to 2.55 MHz ref 100KHz
Group Delay Error (Y) 10 Hz to 5.2 MHz, <5nS p-p
(CB/CR) 10Hz to 2.5 MHz, <5nS p-p
RelativeTiming Error Y to CB/CR, <5nS
CB/CR, <5nS
Video Input Differential
Hum Rejection >30dB at 50/60Hz
Internal Sync(Y/GInput)
Timing Digital video output H position error <25nS with respect to input sync
External Sync Timing Coarse control ±8 steps of 296 nS,
±2µS total range
Fine control range 400 nS
Vertical Blanking (525) selectable 9 lines (Narrow) or 19 lines
(Wide)
(625) selectable 9 lines (Narrow) or 25lines
(Wide)
Electrical Length 5.05µS
Standards Selection Automatic 525/625
Black Level Accuracy Maintained to full 10 bit by drift free digital
clamps.Y channel black level trim adjustment
provides ±20mV correction for input video setup
errors on input formats with setup
AnalogGainandYBlack
Calibration Test point provided to allow observation of input videoY channel peak white and black levels as
will as CB/CRchannel peak levels with digital
level references
Environmental/Power
Operating Temperature 0 to 50 degrees C
Humidity 95% non-condensing maximum
Power <17 watts from frame power supply
EMI Complies with FCC and VDE requirements
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8
SMS 8301A Component Analog Video to Serial Component Digital Converter
Installation
This section contains:
■Module Configuration
■Module Installation
■Rear Connector
■Front Panel Controls/Displays
Module Configuration
When installing the 8301A module, six jumpers must be checked
and/or set:
■Vertical Blanking Width Selection Jumper, JP1
■8/10 bit Output Selection Jumper, JP101
■MII/BETA Format Configuration Jumper, JP102
■GBR Format Internal/External Sync Selection Jumper, JP103
■Chroma Filter Selection Jumper, JP600
■External Sync Source Jumper, JP900
347301A1.book Page 8 Thursday, November 2, 2000 10:41 AM