evertz 8950 User manual

Model 8950 Digital VITC Reader
Instruction Manual
© Copyright 1996
EVERTZ MICROSYSTEMS LTD.
5288 John Lucas Drive, Burlington, Ontario, Canada, L7L 5Z9
Phone: [phone]
Fax: [phone]
Internet: Sales: [email protected]
Tech Support: [email protected]
Web Page: http://www.evertz.com
Revision 1.1, October, 1996
The material contained in this manual consists of information that is the property of Evertz Microsystems and is
intended solely for the use of purchasers of the 8950 Digital VITC Reader. Evertz Microsystems expressly
prohibits the use of this manual for any purpose other than the operation of the 8950.
All rights reserved. No part of this publication may be reproduced without the express written permission of Evertz
Microsystems Ltd. Copies of this guide can be ordered from your Evertz products dealer or from Evertz
Microsystems.

INFORMATION TO USERS IN EUROPE
NOTE
CISPR 22 CLASS A DIGITAL DEVICE OR PERIPHERAL
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to the European Union EMC directive. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation
of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense.
INFORMATION TO USERS IN THE U.S.A.
NOTE
FCC CLASS A DIGITAL DEVICE OR PERIPHERAL
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
WARNING
Changes or Modifications not expressly approved by Evertz Microsystems Ltd. could
void the user’s authority to operate the equipment.
Use of unshielded plugs or cables may cause radiation interference. Properly shielded
interface cables with the shield connected to the chassis ground of the device must be
used.

Model 8950 Digital VITC Reader Manual
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 Original issue January 96
1.1 Added Chapter 5, Technical Description October 96
Updated Chapter 2, Installation November 96
Updated Chapter 5 May 97

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Model 8950 Digital VITC Reader Manual
TABLE OF CONTENTS i
TABLE OF CONTENTS
1. OVERVIEW.................................................................................................................................. 1-1
1.1. HOW TO USE THIS MANUAL .................................................................................................... 1-1
1.2. DEFINITIONS .............................................................................................................................. 1-1
2. INSTALLATION........................................................................................................................... 2-1
2.1. REAR PANEL.............................................................................................................................. 2-1
2.1.1. Digital Video Connections ............................................................................................. 2-1
2.1.2. Linear Time Code Connections..................................................................................... 2-1
2.1.3. Analog Monitor Connections (8950-MON option) ......................................................... 2-1
2.1.4. Remote Control Connections ........................................................................................ 2-1
2.1.5. Power Connections ....................................................................................................... 2-2
2.2. MOUNTING ................................................................................................................................. 2-2
2.3. POWER REQUIREMENTS .........................................................................................................2-2
2.3.1. Selecting the Correct Mains Voltage............................................................................. 2-2
2.3.2. Changing the Fuse........................................................................................................2-3
2.4. CONNECTING THE DIGITAL VIDEO ......................................................................................... 2-3
2.4.1. Video Input .................................................................................................................... 2-3
2.4.2. Video Output ................................................................................................................. 2-4
2.5. LINEAR TIME CODE TRANSLATOR OUT ................................................................................ 2-4
2.6. TYPICAL APPLICATION ............................................................................................................ 2-5
3. HOW TO OPERATE THE DIGITAL VITC READER................................................................... 3-1
3.1. AN OVERVIEW OF KEY AND DISPLAY FUNCTIONS.............................................................. 3-1
3.1.1. The Setup Push-button Group ...................................................................................... 3-1
3.1.2. The Character Window-Button Group........................................................................... 3-2
3.1.3. The Display-Button........................................................................................................ 3-2
3.1.4. An Overview of the SHIFT Key functions...................................................................... 3-2
3.1.5. An Overview of the Status Indicators ............................................................................ 3-3
3.2. AN OVERVIEW OF THE FRONT PANEL PROGRAMMING MENU .......................................... 3-3
3.2.1. Engineering Setup Menu............................................................................................... 3-5
3.3. PROGRAMMING THE 8950 OPERATIONAL MODES .............................................................. 3-6
3.3.1. Selecting the Video Type .............................................................................................. 3-6
3.3.2. Selecting the Format of the Time and User Bit Data..................................................... 3-7
3.3.3. Setting The VITC Reader Line Range .......................................................................... 3-7
3.3.4. Controlling the Reader ‘Look ahead’ Compensation..................................................... 3-7
3.3.5. Selecting the Character Size......................................................................................... 3-8

Model 8950 Digital VITC Reader Manual
TABLE OF CONTENTS ii
3.3.6. Selecting the Character Style........................................................................................ 3-8
3.3.7. Selecting whether the Frames, Fields and Symbols will be displayed on the VCG ...... 3-9
3.4. PROGRAMMING THE ENGINEERING SETUP FUNCTIONS ................................................... 3-9
3.4.1. Selecting the Serial Port Baud Rate.............................................................................. 3-9
3.4.2. Selecting the Serial Port Data Format........................................................................... 3-9
3.4.3. Testing the Serial Port................................................................................................. 3-10
3.4.4. Adjusting the Front Panel Display Brightness ............................................................. 3-10
3.4.5. Resetting the 8950 to Factory Defaults....................................................................... 3-10
3.4.6. Displaying the 8950 Software version......................................................................... 3-10
3.5. CHARACTER GENERATOR FUNCTIONS .............................................................................. 3-10
3.5.1. Selecting and Positioning the Individual Character Inserter Windows ........................ 3-10
3.5.2. Positioning the Overall Character Display................................................................... 3-11
3.5.3. Making Fine Adjustments To The Character Generator Raster Position .................... 3-11
3.5.4. Character Generator On/ Off Controls ........................................................................ 3-11
3.5.5. Special VCG Indicators ............................................................................................... 3-11
3.6. PARALLEL REMOTE CONTROL FUNCTIONS....................................................................... 3-12
4. SERIAL REMOTE CONTROL PROTOCOL ............................................................................... 4-1
4.1. OVERVIEW.................................................................................................................................. 4-1
4.1.1. Connector Pin Assignment............................................................................................ 4-1
4.1.2. Data Format .................................................................................................................. 4-1
4.2. COMMUNICATIONS PROTOCOL.............................................................................................. 4-2
4.3. MESSAGE BLOCK FORMAT..................................................................................................... 4-3
4.4. COMMANDS ............................................................................................................................... 4-4
4.5. DATA FORMATS ........................................................................................................................ 4-6
4.5.1. Time Format Block ........................................................................................................4-6
4.5.2. Data Format Block ........................................................................................................4-6
4.6. COMMAND AND RESPONSE DESCRIPTIONS ........................................................................ 4-6
4.6.1. System Commands ....................................................................................................... 4-6
4.7. VIDEO CHARACTER INSERTER COMMANDS ........................................................................ 4-7
4.8. READER COMMANDS ............................................................................................................... 4-9
5. TECHNICAL DESCRIPTION....................................................................................................... 5-1
5.1. OVERVIEW.................................................................................................................................. 5-1
5.2. JUMPERS AND SWITCHES.......................................................................................................5-1
5.2.1. DIP Switch Functions .................................................................................................... 5-1
5.2.2. Jumper Functions - Main Board .................................................................................... 5-1

Model 8950 Digital VITC Reader Manual
TABLE OF CONTENTS iii
5.3. CIRCUIT DESCRIPTION............................................................................................................. 5-2
5.3.1. Microcontroller (8025-36) .............................................................................................. 5-2
5.3.2. Front Panel Display and Pushbuttons (5220-31) .......................................................... 5-3
5.3.3. Serial Digital Video Input (8025-33) .............................................................................. 5-4
5.3.4. Serial Digital Video Output (8025-34) ........................................................................... 5-2
5.3.5. VITC Reader/Character Generator Logic (8034-31, 8034-32, 8034-33) or (8037-31,
8037-32, 8037-33)......................................................................................................... 5-2
5.3.6. Keyer LCA (8025-32, 8025-35, 8025-37)...................................................................... 5-3
5.3.7. LTC Translator (8025-35) and (8037-33, or 8036-30)................................................... 5-4
5.3.8. Analog Monitor Output - optional (8026-31, 8026-32) or (8029-31, 8029-32).............. 5-4
Figures
Figure 2-1: 8950 Rear Panel........................................................................................................2-1
Figure 2-2: Typical Application of 8950 for Character Generation and Translation to LTC .........2-5
Figure 3-1: Front Panel Layout ....................................................................................................3-1
Figure 3-2: Overview of the 8950 Programming Menu System ...................................................3-5
Figure 3-3 Overview of the 8950 Engineering Menu ...................................................................3-6
Figure 4-1: Communications Protocol State Diagram..................................................................4-2
Figure 5-1: DIP Switch Functions ................................................................................................5-1
Figure 5-2: Block Diagram ...........................................................................................................5-3
Tables
Table 4-1: Systems Commands and their Valid Responses........................................................4-4
Table 4-2: Character Generator Commands and their Valid Responses ....................................4-5
Table 4-3: Reader Commands and their Valid Responses..........................................................4-5
Table 4-4: VCG Window Numbers...............................................................................................4-7
Table 4-5: VCG Sizes ..................................................................................................................4-7
Table 4-6: Reader Modes ............................................................................................................4-9
Table 5-1: Keyboard Scan Codes.................................................................................................5-4
Drawings..................................................................................................................................... Drawing #
Parallel Video I/O Schematic ............................................................................................................. 8025-31F
Serial / Parallel Mux and I/O Schematic............................................................................................. 8025-32F
Serial Video Input Schematic ............................................................................................................. 8025-33F
Serial Video Output Schematic .......................................................................................................... 8025-34F
Digital Video LCA Schematic ............................................................................................................. 8025-35F
Microprocessor and EPROM Schematic............................................................................................ 8025-36F
Monitor submodule Header, Tri Oscillator and Control Inputs Schematic ........................................ 8025-37F
Power Supply DIP Switch and Display Header Schematic................................................................ 8025-38F
Clock Buffer and Phase Restorer Schematic..................................................................................... 8025-39F
Main Board Component Layout ....................................................................................................... 8025-83F1
Video Encoder....................................................................................................................................8029-30B
Digital I/O & Submodule Headers ......................................................................................................8029-31B
Option CC D’Code Circuit ..................................................................................................................8029-32B
8029 Top Component Layout.............................................................................................................8029-80B
8029 Bottom Component Layout .......................................................................................................8029-81B
VITC / Character Generator Submodule Memory Schematic............................................................8034-31A
VITC / Character Generator Submodule LCA Schematic..................................................................8034-32A
VITC / Character Generator Submodule Header Schematic ............................................................. 8034-33A
VITC / Character Generator Component Layout ...............................................................................8034-80A
Memory & Serial I/O Circuits..............................................................................................................8037-31B
LTC Input Circuitry .............................................................................................................................8037-32B

Model 8950 Digital VITC Reader Manual
TABLE OF CONTENTS iv
VITC/Char Output Circuitry ................................................................................................................8037-33B
LCA Circuit .........................................................................................................................................8037-34B
Optional Colour Frame & Ref Video Circuit .......................................................................................8037-35B
Sub-Module Header ...........................................................................................................................8037-36B
VITC/CHAR Generator Sub-Module Component Layout...................................................................8037-82B
Display Board Schematic ...................................................................................................................5220-31C
Display Board Component Layout .....................................................................................................5220-89C
Power Supply Schematic ...................................................................................................8102-31A
Power Supply Component Layout .....................................................................................8102-80A

Model 8950 Digital VITC Reader Manual
OVERVIEW Page 1-1
1. OVERVIEW
The 8950 is a multi-purpose Digital VITC Reader that extracts the vertical
interval timecode directly from the digital bitstream. The model 8950 VITC
reader's line range can be easily programmed from the front panel, thus
permitting recovery of specific VITC data where multiple sets have been
recorded.
Features:
• Standard unit is equipped for component digital video.
• Serial digital video input provides automatic cable equalization on cable
lengths up to 200 meters of low loss coax such as Belden 8281
• Serial digital video output provides two separate outputs
• Passes embedded audio and other ancillary data signals
• Rack mountable
• 8 or 10 bit resolution
• 12 digit Alpha-numeric display, with 10 pushbuttons
• Serial Remote Control for connection to a computer - Broadcasts
reader data or sends it on request.
1.1. HOW TO USE THIS MANUAL
This manual is organized into 5 chapters: Overview, Installation, Operation,
Serial Remote Control Protocol and Technical Description.
Items of special note are indicated with a double box like this.
1.2. DEFINITIONS
AES: (Audio Engineering Society): A professional organization
that recommends standards for the audio industries.
AES/EBU:Informal name for a digital audio standard established jointly by
the Audio Engineering Society and the European Broadcasting
Union organizations.
ANALOG: An adjective describing any signal that varies continuously as
opposed to a digital signal that contains discrete levels
representing digits 0 and 1.
A-TO D CONVERTER (ANALOG-TO-DIGITAL): A circuit that uses
digital sampling to convert an analog signal into a digital
representation of that signal.
!

Model 8950 Digital VITC Reader Manual
OVERVIEW Page 1-2
BIT: A binary representation of 0 or 1. One of the quantized levels of
a pixel.
BIT PARALLEL: Byte-wise transmission of digital video down a multi-
conductor cable where each pair of wires carries a single bit.
This standard is covered under SMPTE 125M, EBU 3267-E and
CCIR 656.
BIT SERIAL: Bit-wise transmission of digital video down a single
conductor such as coaxial cable. May also be sent through
fiber optics. This standard is covered under SMPTE 259M and
CCIR 656.
BIT STREAM:A continuous series of bits transmitted on a line.
BNC: Abbreviation of "baby N connector". A cable connector used
extensively in television systems.
BYTE: A complete set of quantized levels containing all the bits. Bytes
consisting of 8 to 10 bits per sample are typical in digital video
systems.
CABLE EQUALIZATION: The process of altering the frequency
response of a video amplifier to compensate for high frequency
losses in coaxial cable.
CCIR (International Radio Consultative Committee) An international
standards committee. (This organization is now known as ITU.)
CCIR-601:(This document now known as ITU-R601). An international
standard for component digital television from which was
derived SMPTE 125M and EBU 3246-E standards. CCIR-601
defines the sampling systems, matrix values and filter
characteristics for both Y, B-Y, R-Y and RGB component digital
television signals.
CCIR-656(This document now known as ITU-R656).The physical parallel
and serial interconnect scheme for CCIR-601. CCIR-656
defines the parallel connector pinouts as well as the blanking,
sync and multiplexing schemes used in both parallel and serial
interfaces. It reflects definitions found in EBU Tech 3267 (for
625 line systems) and SMPTE 125M (parallel 525 line systems)
and SMPTE 259M (serial 525 line systems).
CLIFF EFFECT (also referred to as the ‘digital cliff’) This is a
phenomenon found in digital video systems that describes the
sudden deterioration of picture quality when doe to excessive bit
errors, often caused by excessive cable lengths. The digital
signal will be perfect even though one of its signal parameters is
approaching or passing the specified limits. At a given moment

Model 8950 Digital VITC Reader Manual
OVERVIEW Page 1-3
however, the parameter will reach a point where the data ca no
longer be interpreted correctly, and the picture will be totally
unrecognizable.
COMPONENT ANALOG: The non-encoded output of a camera, video
tape recorder, etc., consisting of the three primary colour
signals: red, green, and blue (RGB) that together convey all
necessary picture information. In some component video
formats these three components have been translated into a
luminance signal and two colour difference signals, for example
Y, B-Y, R-Y.
COMPONENT DIGITAL: A digital representation of a component
analog signal set, most often Y, B-Y, R-Y. The encoding
parameters are specified by CCIR-601. The parallel interface is
specified by CCIR-656 and SMPTE 125M.
COMPOSITE ANALOG: An encoded video signal such as NTSC or
PAL video, that includes horizontal and vertical synchronizing
information.
COMPOSITE DIGITAL: A digitally encoded video signal, such as
NTSC or PAL video, that includes horizontal and vertical
synchronizing information.
D1: A component digital video recording format that uses data
conforming to the CCIR-601 standard. Records on 19 mm
magnetic tape. (Often used incorrectly to refer to component
digital video.)
D2: A composite digital video recording format that uses data
conforming to SMPTE 244M. Records on 19 mm magnetic
tape. (Often used incorrectly to refer to composite digital video.)
D3: A composite digital video recording format that uses data
conforming to SMPTE 244M. Records on 1/2" magnetic tape.
EBU (European Broadcasting Union): An organization of European
broadcasters that among other activities provides technical
recommendations for the 625/50 line television systems.
EBU TECH 3267-E: The EBU recommendation for the parallel interface
of 625 line digital video signal. This is a revision of the earlier
EBU Tech 3246-E standard which was in turn derived from
CCIR-601.
EDH Error Detection and Handling (EDH) is defined in SMPTE
RP-165 as a method of determining when bit errors have
occurred along the digital video path. According to RP-165, two
error detection checkwords are used, one for active picture

Model 8950 Digital VITC Reader Manual
OVERVIEW Page 1-4
samples, and the other on a full field of samples. Three sets of
flags are used to convey information regarding detected errors,
to facilitate identification of faulty equipment or cabling. One set
of flags is associated with each checkword, and the third is used
to evaluate ancillary data integrity. The checkwords and flags
are combined into a special error detection data packet which is
included as ancillary data in the serial digital signal.
EMBEDDED AUDIO: Digital audio is multiplexed onto a serial digital video
data stream.
ITU: The United Nations regulatory body governing all forms of
communications. ITU-R (previously CCIR) regulates the radio
frequency spectrum, while ITU-T (previously CCITT) deals with
the telecommunications standards.
ITU-R601: See CCIR601
PIXEL: The smallest distinguishable and resolvable area in a video
image. A single point on the screen. In digital video, a single
sample of the picture. Derived from the words picture element.
RESOLUTION: The number of bits (four, eight, ten, etc.) determines
the resolution of the signal. Eight bits is the minimum resolution
for broadcast television signals.
4 bits = a resolution of 1 in 16.
8 bits = a resolution of 1 in 256.
10 bits = a resolution of 1 in 1024.
SERIAL DIGITAL: Digital information that is transmitted in serial form.
Often used informally to refer to serial digital television signals.
SMPTE (Society of Motion Picture and Television Engineers): A
professional organization that recommends standards for the
film and television industries.
SMPTE 125M: The SMPTE standard for bit parallel digital interface
for component video signals. SMPTE 125M defines the
parameters required to generate and distribute component
video signals on a parallel interface.
SMPTE 244M: The SMPTE standard for bit parallel digital interface
for composite video signals. SMPTE 244M defines the
parameters required to generate and distribute composite video
signals on a parallel interface.
SMPTE 259M: The SMPTE standard for 525 line serial digital
component and composite interfaces.

Model 8950 Digital VITC Reader Manual
OVERVIEW Page 1-5
TRS: Timing reference signals used in composite digital systems.
(It is four words long).
TRS-ID: Abbreviation for "Timing Reference Signal Identification". A
reference signal used to maintain timing in composite digital
systems. (It is four words long.)
4:2:2 A commonly used term for a component digital video format.
The details of the format are specified in the CCIR-601
standard. The numerals 4:2:2 denote the ratio of the sampling
frequencies of the luminance channel to the two colour
difference channels. For every four luminance samples, there
are two samples of each colour difference channel.
4Fsc Four times subcarrier sampling rate uses in composite digital
systems. In NTSC this is 14.3 MHz. In PAL this is 17.7 MHz.

Model 8950 Digital VITC Reader Manual
OVERVIEW Page 1-6
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Model 8950 Digital VITC Reader Manual
2. INSTALLATION .................................................................................................................................. 2-1
2.1. REAR PANEL .................................................................................................................................. 2-1
2.1.1. Digital Video Connections.................................................................................................. 2-1
2.1.2. Linear Time Code Connections ......................................................................................... 2-1
2.1.3. Analog Monitor Connections (8950-MON option) .............................................................. 2-1
2.1.4. Remote Control Connections............................................................................................. 2-1
2.1.5. Power Connections............................................................................................................ 2-2
2.2. MOUNTING ...................................................................................................................................... 2-2
2.3. POWER REQUIREMENTS .............................................................................................................. 2-2
2.3.1. Selecting the Correct Mains Voltage.................................................................................. 2-2
2.3.2. Changing the Fuse............................................................................................................. 2-3
2.4. CONNECTING THE DIGITAL VIDEO.............................................................................................. 2-3
2.4.1. Video Input......................................................................................................................... 2-3
2.4.2. Video Output ...................................................................................................................... 2-4
2.5. LINEAR TIME CODE TRANSLATOR OUT ..................................................................................... 2-4
2.6. TYPICAL APPLICATION ................................................................................................................. 2-5
Figures
Figure 2-1: 8950 Rear Panel........................................................................................................ 2-1
Figure 2-2: Typical Application of 8950 for Character Generation and Translation to LTC ........ 2-5

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Model 8950 Digital VITC Reader Manual
INSTALLATION Page 2-1
2. INSTALLATION
2.1. REAR PANEL
MONITOR
VIDEO IN
.25 A
.125 A
230V:
115V:
FUSE
VIDEO
PARALLEL
SERIAL
REMOTE CONTROL
model 8950
DIGITAL VITC READER
C
T
O
U
L
T
MADE IN CANADA
EVERTZ MICROSYSTEMS LTD
SDI
VIDEO OUT
SDI
Figure 2-1: 8950 Rear Panel
The following sections describe the purpose of the rear panel connectors of
the 8950. Sections 2.1.1 to 2.1.3 describe the specific signals that should
be connected to the 8950.
2.1.1. Digital Video Connections
VIDEO IN SDI: A BNC connector for input of 10 bit serial digital
video signals compatible with the SMPTE 259M standard.
VIDEO OUT SDI: Two BNC connectors for output of 10 bit serial digital
video signals compatible with the SMPTE 259M standard. This
video will be the video input with characters inserted onto it.
2.1.2. Linear Time Code Connections
LTC OUT: A male XLR connector for output of SMPTE / EBU linear
timecode from the VITC to LTC translator.
2.1.3. Analog Monitor Connections (8950-MON option)
The analog composite monitor output is optional and may not be fitted on
your unit.
MONITOR VIDEO: A BNC output of the optional composite analog
encoder.
2.1.4. Remote Control Connections
SERIAL: A 9 pin female 'D' connector for RS232/422 communications to a
computer

Model 8950 Digital VITC Reader Manual
INSTALLATION Page 2-2
Pin Description
1 Ground
2 RS-422 Transmit A(-)
3 RS-422 Receive B(+)
4 Receive Common
5 RS-232 Transmit
6 Transmit Common
7 RS-422 Transmit b(+)
8 RS-232 Receive and RS-422 Receive A(-)
9 Ground
PARALLEL: A 9 pin female 'D' connector for connection to 'closure to
ground' remote control signals for the character inserter. Each
input has an internal 47 K ohm pull-up to +5 volts.
Pin Description
1 Ground
2 n/c
3 n/c
4 Time VCG Window On/Off
5 UB VCG Window On/Off
6 VCG Keyer On/Off
7 Front Panel Time/UB Display
8 not used
9 Ground
2.1.5. Power Connections
LINE: The 8950 may be set for either 115v/60 Hz or 230v/50 Hz AC
operation. The voltage selector switch is accessible on the rear
panel. The line voltage connector contains an integral slow
blow fuse (and a spare one).
2.2. MOUNTING
The 8950 Digital VITC Reader is equipped with rack mounting angles and
fits into a standard 19 inch by 1 3/4 inch (483 mm x 45 mm) rack space.
The mounting angles may be removed if rack mounting is not desired.
2.3. POWER REQUIREMENTS
2.3.1. Selecting the Correct Mains Voltage
Power requirements are 115 or 230 volts AC at 50 or 60 Hz, switch
selectable on the rear panel. Power should be applied by connecting a 3
wire grounding type power supply cord to the power entry module on the

Model 8950 Digital VITC Reader Manual
INSTALLATION Page 2-3
rear panel. The power cord should be minimum 18 AWG wire size, type
SST marked VW-1, maximum 2.5 m in length.
Before connecting the line power, be sure to select the proper line voltage.
Also, check that the line fuse is rated for the correct value marked on the
rear panel.
The power entry module combines a standard IEC 320 power inlet
connector, voltage selector switch, two 5 x 20 mm fuse holders (one active,
one spare) and an EMI line filter.
To change the mains voltage setting, open the cover of the power entry
module using a small screwdriver. Remove the drum selector switch, and
re-insert it so that the desired voltage is visible through the opening on the
mains connector cover. Check that the correct fuse is in use as shown in
section below.
2.3.2. Changing the Fuse
The fuse holder is located inside the power entry module. To change the
fuse, open the cover of the power entry module using a small screwdriver.
The fuse holder on the bottom contains the active fuse. The one at the top
contains a spare fuse. Pull the bottom fuse holder out and place a fuse of
the correct value in it. Use slo blo (time delay) 5 x 20 mm fuses rated for
250 Volts with the following current ratings:
For 115 Volt operation 250 mA
For 230 Volt operation 125 mA
Make sure that the arrow is pointing down when you replace the fuse
holder. Close the door on the power entry module and connect the mains
voltage.
Never replace with a fuse of greater value.
2.4. CONNECTING THE DIGITAL VIDEO
2.4.1. Video Input
The 8950 requires that a digital video source be connected to the VIDEO
IN SDI video input. The 8950 may be configured to accept either 525 or
625 line digital video in the component (4:2:2) format or 525 line digital
"
"

Model 8950 Digital VITC Reader Manual
INSTALLATION Page 2-4
video in the composite (4Fsc) format. The VIDEO TYPE parameter on the
front panel menu must be set correctly to match the video input. See
section 3.3.1 for information on changing the video type setting.
The 4:2:2 and 4 Fsc LED's indicate which input is active. The VIDEO LED
indicates that there is video present. When it is blinking it indicates that
there is no video present.
2.4.2. Video Output
The VIDEO OUT SDI outputs contain the input video with VITC (with
timecode, source ID and VTR status encoded), and character data keyed
in by the keyer. Connect one of these outputs to any input on your system
that accepts 8 or 10 bit SERIAL digital video. Two identical VIDEO OUT
SDI digital video outputs are provided.
2.5. LINEAR TIME CODE TRANSLATOR OUT
The 8950 provides a fully decoded and regenerated play speed LTC output
containing the time and user bits of the VITC Reader. The output is
available on an XLR connector at the rear panel. Output level is adjustable
from approximately 0.5 V to 4 V using a trim pot inside the unit. The code
output should be connected to the record input of the time code channel of
your video recorder. Pin 1 of the XLR is ground. Pins 2 and 3 provide a
balanced output.