GRASS VALLEY SMS 8301A Instruction Manual

Instruction Manual

TP3473-01

FIRST PRINTNG: AUGUST 1995

REVISED PRINTNG: DECEMBER1997

SMS 8301A

COMPONENT ANALOG VIDEO TO SERIAL DIGITAL CONVERTER

Contacting Grass Valley Group

Region Voice Fax Address Web Site

North America [phone]

Pacific Operations [phone]

U.K., Europe, Asia,
Middle East

France [phone]
Germany [phone] [phone]

530-478-4148

Support: 852-2585-6579
[phone] [phone]

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 pat­ents, issued and pending. Product options and specifications subject to change without
notice. The information in this manual is furnished for informational use only, is sub­ject 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.

[phone] Grass Valley Group

[phone]

P.O. Box 599000
Nevada City, CA 95959-7900 USA

www.grassvalleygroup.com

Contents

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

iii

Contents

Index

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-1

iv

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

v

Contents

List of Tables

Table 1. Format Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 2. Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

vi

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.

vii

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.

viii

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.

ix

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.

x

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

Power Supply Cords

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.

xi

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

xii

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.

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

1

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.

Reference

Vertical

Detector

Sync

External

Reference

Input

Amplifiers

and

Reference

Selector

Ref

Video

Timing and Control

Y/G
B-Y/B
R-Y/R

Analog

Processing

and Filtering

Y/G
B-Y/B
R-Y/R

Signal Processing

Figure 1. 8301A Block Diagram

Sync

Separator

A/D Converter

and

Digital Filter

Ref

Horiz

Y/G
B-Y/B
R-Y/R

Lock Phase

Error

Detector

Digital Matrix

with

Bypass

2

Local Horizontal Timing

Ref Sync
Presence

Detector

Ref Vertical

Free Run

Control

Format
Select
Switch

Remote

Monochrome

Control

System Control

Micro

Controller

System
Control

Outputs

Function

Freq

Control

27 MHz and 13.5 MHz

Y

B-Y

Lowpass Filter

R-Y

27MHz VCXO

and

Divider

Clocks

Y

Channel

Delay

Chroma
Channel

13.5 MHz

Y

B-Y
R-Y

Horizontal

Timing

Generator

Horiz Timing

Signals

Calibration

Display

Generator

Blanking Gate

Limiter and

Rounder

2H Clock

Y

Chroma

Vert Timing

Generator

and Auto

Standard Logic

525/625

Control

CCIR 601

Encoder

Calibration

Display

Test Point

CCIR

601

Vertical

Timing Signals

Scrambler

and

Serializer

Serial
Digital

Outputs

3

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.

4

Timing and Control

Function

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.

5

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 MII, BETA, SMPTE, EBU N10, GBR

External Reference Input

External Reference
Selections Available

Input Signal Type Color Black
Return Loss >40dB to 5.0MHz
Level 300mV sync ±6dB
Timing Within ±2µS of video input

Selection between US or Japan MII/BETA

(Selectable in GBR mode only)

Selection of frame reference or individual
module reference (75Ω terminating)

Output

Signal Type Serial component digital conforming to proposed

SMPTE 259M

/EBU Tech 3267 standard

Connectors Two (2) 75Ω BNCs
Impedance 75
Return Loss >15 dB (5MHz to 270MHz)
Output DC Zero volts (ac coupled)

Ω

Performance

A to D Conversion Oversampled (27MHz) 10 bits
Output Data Bits Switchable between 10 or rounded to 8
Vernier Analog Gain

Control

6

Provides compensation for analog inputs of
±1dB with respect to selected format nominal

Specifications

Performance

(Continued)

Frequency Response (Y) ±0.1dB to 6MHz ref 100 kHz

(C

B/CR) ±0.1 dB to 2.55 MHz ref 100KHz

Group Delay Error (Y) 10 Hz to 5.2 MHz, <5nS p-p

(C

B/CR) 10Hz to 2.5 MHz, <5nS p-p

Relative Timing Error Y to CB/CR, <5nS

C

B/CR, <5nS

Video Input Differential

>30dB at 50/60Hz

Hum Rejection
Internal Sync (Y/G Input)

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
Analog Gain and Y Black

Calibration

Test point provided to allow observation of input

video Y channel peak white and black levels as

will as C

B/CR channel 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

7

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

8

Installation

Vertical Blanking Width Selection

JP1 selects between Narrow or Wide vertical blanking width
when operating in the 525 or 625 line standard. See Figure 2 below
for the location and settings of JP1.

JP1

NARROW WIDE NARROW WIDE

Figure 2. JP1 Jumper Settings

JP1

OR

9

SMS 8301A Component Analog Video to Serial Component Digital 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.

JP101

BITS

BITS

8

10

Figure 3. JP101 Jumper Settings

OR

BITS

8

JP101

BITS

10

10

Installation

MII/BETA Format Configuration

JP102 alters the parameters associated with the BETA and MII
input selector switch on the front panel. It provides selection of US
(setup 7.5 IRE present) or JAPAN (no setup 0 IRE) versions of the
525 line BETA and MII CAV formats.

Figure 4 illustrates the location and settings for JP102.

JP102

US

JAPAN

Figure 4. JP102 Jumper Settings

OR

US

JP102

JAPAN

11

SMS 8301A Component Analog Video to Serial Component Digital Converter

GBR Format Internal/External Sync Selection

JP103 selects a synchronizing pulse source for the GBR input CAV
format, it does not affect the sync source for other CAV input
formats. For all other CAV formats, the input Y channel sync is
used as a reference regardless of the position of JP103.

If the GBR source has sync on the green channel, JP103 should be
placed in the G INPUT position. If the GBR source does not have
sync present on the green channel, 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 G
input has sync present, if desired.

Figure 5 illustrates the location and settings for JP103.

12

JP103

INPUT

REF

G

EXT

Figure 5. JP103 Jumper Settings

OR

JP103

INPUT

G

REF

EXT

Installation

Chroma Filter Selection

JP600 selects digital chroma channel low pass filter responses. In
the NORMAL position, the chroma channel filter response is very
flat and has a rapid roll off at the high frequency cutoff. The fast
cutoff of the NORMAL filter can result in some overshoots and
ringing on fast waveform edges but provides the best frequency
response if the same video must be filtered multiple times.

In the SLOW position, the roll is gradual which results in less
ringing and waveform distortion of fast waveform edges. This
gradual roll off will result in deteriorating high frequency
response if the same video must be filtered multiple times.
Because of the increased attenuation of the SLOW filter at the
Nyquist frequency (3.375 MHz), this filter response may be
preferred if large amounts of energy are present in the video
signal near this frequency to reduce beats in the chroma channels.

Figure 6 illustrates the location and settings for JP600.

SLOW

FILTER SELECT

JP600

NORM

Figure 6. JP600 Jumper Settings

OR

SLOW

JP600

NORM

FILTER SELECT

13

SMS 8301A Component Analog Video to Serial Component Digital Converter

External Sync Source

JP900 selects an external sync source. Position A selects the loop
through frame reference. Position B selects a terminating
reference input used for this module only.

NOTE: JP900 does not have to be set unless GBR Format Internal/
External Sync Selection (JP103) is in the External 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 module needing the alternate sync
source.

Figure 7 illustrates the location and settings of JP900.

14

BAEXT REF

JP900

Figure 7. JP900 Jumper Settings

OR

BAEXT REF

JP900

Module Installation

Installation

Follow the steps listed below to install a module into the SMS 8000
Frame.

1. Insert the module 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.

15

SMS 8301A Component Analog Video to Serial Component Digital Converter

Rear Connectors

Inputs/Outputs

The frame rear panel for each module consists of six BNCs, and
one 9-pin D connector. Each module uses a unique overlay which
labels the connector set appropriately for the function of that
module.

For the 8301A, three BNCs are component inputs and two BNCs
are serial digital outputs. The sixth BNC is an 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 8 illustrates the 8301A rear
connector overlay.

8301

REF

IN

270Mb

OUT

G/Y

IN

B/B-Y

IN

R/R-Y

IN

Figure 8. 8301A Rear Connector Overlay

Remote

9 pin D connector J7 provides a remote input at pin 5 (which if
pulled to ground will force the 8301A modules chroma channels
off to create a monochrome output). An output at pin 8 will
indicate if the module is operating in 525 or 625 line standard. The
output will be +5 volts in the 525 mode or 0 volts in the 625 mode.
Pins 1 and 9 provide frame ground connections.

8301

16

Front Panel Controls/Displays

The 8301A Front Panel Controls and Displays are discussed in the
six categories listed below:

■ Front Panel

■ Input Format

■ Y Black Level Control

■ Gain Controls

■ H Timing Controls

■ Ref Present LED

Installation

17

SMS 8301A Component Analog Video to Serial Component Digital Converter

Front Panel

The 8301A Front Panel consists of five trim pots, a five position
rotary switch, 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 9.

GND

GAIN CAL

GAIN

1=MII
2=BETA

REF

3=EBU NI0

PRESENT

4=SMPTE
5=GBR

R/R-YB/B-YY/G

GND

+5V

INPUT

FORMAT

5

4

3

2

1

0

6

7

Y BLACK

LEVEL

-5V

H ø COARSE

EXT
REF

H

A

B

9

8

7

6

5

4

3

2

1

0

ø

C

D

E

F

FINE

COMPONENT
A D

TRIGGER

Figure 9. 8301A Front Panel

Input Format

Input format select switch S100 must be set to conform to the CAV
input signal format being used. Table 1 lists the format selections.

Table 1. Format Selection

Input Format Select Switch Positions

1 = MII (525 line only)
2 = BETA (525 line only)
3 = EBU N10 (used for 625 line MII and BETA)

SMS 8301

18

4 = SMPTE
5 = GBR

Installation

Table 2 lists the nominal signal levels for the video formats with

100% saturated color bar signal and 100% luminance.

Table 2. Signal Levels

Format Y Channel Level

MII (US 525) 647.5mV video

plus 52.5 mV setup

MII (Japan 525) 700mV 700mV

BETA (US 525) 660.4mV video

plus 53.6mV setup

BETA (Japan 525) 714mV 1009mV

EBU N10 700mV 700mV

SMPTE 700mV 700mV

GBR G, B, and R channels, all 700mV

Peak to Peak

Chroma Level

647.5 mV

933.3mV

Y Black Level Control

If the US version of the MII or BETA formats is used, the Y black
level control will be operational. This control compensates for
possible incorrect setup level on the Y video input. The output Y
channel black level will be held fixed by a digital clamp when
using other formats and the control will not function.

19

SMS 8301A Component Analog Video to Serial Component Digital Converter

Gain Controls

The three gain controls can be adjusted via two methods, both of
which require a known CAV input level. One method requires the
use of a 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 module.

NOTE: Using the internally generated calibration waveform method to
adjust gains has the advantage that calibrated external equipment is not
required.

When adjusting the gain controls with a calibrated waveform
monitor, a known standard CAV input level (such as 100%
saturated color bars with 100% Y level) should be applied to the
SMS 8301A inputs.

The three gain controls (and Y black level control for MII/BETA
US) are then adjusted to produce correct levels for all channels as
observed on the waveform monitor. Each input gain control
operates independently.

20

If the GBR format is used, the gain controls will interact. The B and
R gain controls should be adjusted to place the positive peaks of
the output CB and CR waveforms at the correct levels. The G gain
control should be adjusted so the Y channel level is correct and the
CB/CR channel waveforms are at zero (mid scale) during the
white bar. The resulting chroma channel and Y levels will be
correct.

The calibration waveform created by the module contains
digitally generated reference levels which make accurate gain
calibration of the oscilloscope unimportant. A 100% level color bar
input is required. 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 20uS/div and a gain of
500mV/div.

Installation

The calibration waveform consists of a four-video-line sequence
within an eight line sequence. It starts with a line which contains
the upper 1/4 of the 10-bit Y channel dynamic range and a Y
channel 100% peak reference level. The next two lines are the
upper or lower 1/8 of the CB then CR channel 10-bit dynamic
ranges and 100% peak positive or negative reference levels. The
fourth line contains the lower 1/4 of the Y channel 10-bit dynamic
range and a Y black reference level.

NOTE: This fourth line does not need to be observed unless the MII or
BETA (US versions) are being used in which case the Y black level must
be adjusted.

The four line sequence repeats with no changes in the Y channel
lines but with the opposite end (upper or lower) of the chroma
channels being displayed. See figure 11 for typical example of
calibration display with 100% full field color bar input and last bar
at black level. The waveform presents a magnified view of peak
digital video levels as compared to digital reference levels. The
module video gain controls can be adjusted to make the video
peak levels match the appropriate reference level as closely as
possible.

When adjusting B-Y and R-Y gains, offset errors, lack of waveform
symmetry, and/or A/D converter linearity errors may make it
impossible to make both waveform peaks match the reference
levels at the same time. The method of adjustment previously
mentioned can be used for GBR inputs while observing the
calibration display.

Figure 10 illustrates the 8301A Calibration Waveform.

21

SMS 8301A Component Analog Video to Serial Component Digital Converter

Full Scale Limit

Waveforms Shown for 100% Y and 100% Saturated Color Bar Input

Level Varies as

Gain is Adjusted

Fixed

Ref

Reference

Level

Reference

Level Varies

as Gain is

Adjusted

Level Varies

as Gain is

Adjusted

Level

Upper and Lower

Portions Present

on Alternate

Repeats of 4

Line Sequence

Reference

Level

Upper and Lower
Portions Present

on Alternate

Repeats of 4

Line Sequence

Reference

Level

Level Varies

as Gain is

Adjusted

Level Varies

as Gain is

Adjusted

Reference

Level

Reference

Level

Level Varies

as Y Black

Level is Adjusted

Ref

22

Y Gain Cal

1 Line

Lower Limit of

Cal WFM Range

B-Y Gain Cal

1 Line

R-Y Gain Cal

1 Line

Y Black Cal

1 Line

Figure 10. 8301A Calibration Waveform

H Timing Controls

If GBR format is being used with external reference sync, the
external reference coarse and fine H timing controls will be
functional. These controls must be adjusted to correctly position
the output picture with respect to the digital timing information
added by the module. The picture 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.

Module Alignment

Alignment Equipment

Module Alignment

This Section contains:

■ Alignment Equipment

■ Free Run Frequency Adjustment

■ Frequency Response Adjustment

■ Y/G Ref H Phase Adjustment

The 8301A is fully aligned at the factory and normally 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, assembly 160007, may be
used to position a module outside the frame during adjustments.

23

SMS 8301A Component Analog Video to Serial Component Digital Converter

Free Run Frequency Adjustment

To adjust the Free Fun Frequency, follow the steps listed below.

1. Place the module on an extender board. (Allow 5 minutes to

reach operating temperature.)

2. Remove Y/G video input signal.

3. Set Jumper JP103 in the G INPUT position (if it is not already
in that position). Refer to Figure 11 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.

24

JP103

INPUT

REF

G

EXT

Figure 11. JP103 Jumper Settings

OR

JP103

INPUT

G

REF

EXT

Frequency Response Adjustment

This adjustment sets the analog video frequency response from
the module input to each A/D converter input. Follow the steps
listed below.

1. Connect GBR format 100% line sweep to module video
inputs.

2. Select GBR input format.

3. Observe response with oscilloscope at TP7 and adjust Y/G
Response C240 to obtain flat response to 5.5MHz.

4. Observe response at TP12 and adjust B/B-Y Response C340 to
obtain flat response to 5.5MHz.

5. Observe response at TP16 and adjust R/R-Y Response C401 to
obtain flat response to 5.5Mhz.

NOTE: If a source of line sweep flat to 6MHz is available response
adjustments should be made to provide flat response to this frequency.

Module Alignment

25

SMS 8301A Component Analog Video to Serial Component Digital Converter

Y/G Ref H Phase Adjustment

This adjustment sets the timing of the modules EAV/SAV digital
timing reference output and digital H blanking. Follow the steps
listed below:

1. Remove shorting jumper on JP103 and short all three pins
together using a small piece of wire. Refer to Figure 12 for
jumper location.

2. Force the Y/G channel digital clamp to operate at mid-scale
by shorting all six pins of JP200 together with a short length of
wire. Refer to Figure 12 for jumper location.

3. Change input format switch to position 3 to enable a test
mode which inhibits digital blanking.

4. Observe digital output with digital signal analyzer. Adjust
R929 to place analog sync leading edge 50% point at Y sample
736 for 525 line standard, or 732 for 625 line standard.

26

5. Remove wires used to short JP103 and JP200.

6. Replace the shorting jumper on JP103 that was previously
removed.

JP103

INPUT

G

REF

EXT

JP200

Figure 12. JP103 and JP200 Shorting Jumpers

Service

Service

The 8301A CAV to Serial Component Digital Converter module
makes extensive use of surface mount technology and
programmable parts to achieve compact size and adherence to
demanding technical specifications. Circuit modules should not
be serviced in the field.

If your module is not operating 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 Products representative for depot location.

For jumper settings or adjustments, refer to the Module
Configuration and Module Alignment sections of this manual.

27

SMS 8301A Component Analog Video to Serial Component Digital Converter

28

Index

Numerics

8/10 Bit Output Selection 10
8301A Calibration Waveform

Illustration 22

8301A Features 1
8301A Front Panel

Illustration 18

8301A Rear Connector Overlay

Illustration 16

A

Alignment Equipment 23

B

BETA 19, 20
BETA Input 11
Blanking Gate Limiter 5
Block Diagram

Illustration 2

C

Calibrated Waveform Monitor 20
Calibration Display Generator 4
CCIR601 Encoder 4
Chroma Channel Lowpass Filters 4
Chroma Filter 13
Component

Inputs 16

Component Analog Video

Specifications 6

D

Digital Matrix 5

E

Environmental/Power

Specifications 7
External Reference Input 6
External Sync Source 14

F

FCC

Part 68 xiv
Format

Inputs 18
Format Selection

Table 18
Free Run Frequency Adjustment 24
Frequency Response Adjustment 25
Front Panel 18
Front Panel Controls/Displays 17

G

Gain Controls 20
GBR 12, 20

H

H Timing Controls 22

Index-1

Index

I

Illustration

8301A Calibration Waveform 22
8301A Front Panel 18
8301A Rear Connector 16
Block Diagram 2
JP1 Jumper Settings 9
JP101 Jumper Settings 10
JP102 Jumper Settings 11
JP103 and JP200 Shorting Jumpers 26
JP103 Jumper Settings 12, 24
JP600 Jumper Settings 13
JP900 Jumper Settings 14

Inputs 16

Component 16
Format 18
Reference 16

Installation 8

J - K

J7 16
JP1 9
JP1 Jumper Settings

Illustration 9

JP101 10
JP101 Jumper Settings

Illustration 10

JP102 11
JP102 Jumper Settings

Illustration 11

JP103 12, 24, 26
JP103 and JP200 Shorting Jumpers

Illustration 26

JP103 Jumper Settings

Illustration 12, 24
JP200 26
JP600 13
JP600 Jumper Settings

Illustration 13

JP900 14
JP900 Jumper Settings

Illustration 14

L

Local Horizontal Timing 5
Lock Phase Error Detector 5

M - N

MII 19, 20
MII Input 11
MII/BETA Format Configuration 11
Module Alignment 23
Module Configuration 8
Module Installation 15

O

Output

Specifications 6

Outputs 16

Serial Digital 16

P - Q

Part 68 xiv
Performance

Specifications 6

R

Rear Connectors 16
Ref Present LED 22
Reference

Inputs 16
Reference Sync 22
Reference Vertical Detector 5
Remote 16
Rounder 5

Index-2

Index

S

S100 Switch 18
Scrambler 4
Serial Digital

Outputs 16
Serializer 4
Service 27
Signal Levels

Table 19
Signal Processing 4
Specifications

Component Analog Video Input 6

Environmental/Power 7

Output 6

Performance 6
Switch S100 18
Sync Selection 12
Sync Separator 5

T - U

Table

Format Selection 18

Signal Levels 19
Timing and Control 5
Timing Generator 5
TP1 20
TP24 20

V - W - X

Vertical Blanking Width Selection 9

Y - Z

Y Black Level Control 19
Y Channel Delay 4
Y/G Ref H Phase Adjustment 26

Index-3

Index

Index-4