evertz S621 User manual

MODELS S621, S621-LTR
VITC GENERATOR/TRANSLATOR
WITH SOURCE IDENT
INSTRUCTION MANUAL
© Copyright 1989
EVERTZ MICROSYSTEMS LTD.
3465 Mainway, Burlington, Ontario, Canada, L7M 1A9
Phone: [phone] Fax: [phone]
BBS: 905-335-9131
Internet: Tech Support: [email protected]
Sales: sales@evertz. com
Revision 1.0, September 1989
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 Evertz time code equipment. Evertz Microsystems expressly prohibits
the use of this manual for any purpose other than the operation or maintenance of the equipment
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.

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REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 Original issue 9/89

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TABLE OF CONTENTS
1. MODEL S621 VITC GENERATOR/TRANSLATOR............................................................................ 1-1
1.1. INSTALLATION ............................................................................................................................... 1-1
1.1.1. Power Requirements ......................................................................................................... 1-2
1.1.2. Video Input and Output ...................................................................................................... 1-2
1.1.3. LTC Input and Output ........................................................................................................ 1-2
1.1.4. Parallel Remote Control..................................................................................................... 1-2
1.2. LINE SELECTION ............................................................................................................................ 1-2
1.3. SOURCE IDENTIFICATION ENCODING ........................................................................................ 1-3
1.3.1. Message Number Switch ................................................................................................... 1-4
1.3.2. Source Number Switch ...................................................................................................... 1-5
1.4. GENERATOR RUN FUNCTIONS ....................................................................................................1-6
1.5. REMOTE CONTROL INPUTS ......................................................................................................... 1-6
1.6. TECHNICAL DESCRIPTION ........................................................................................................... 1-7
1.6.1. Microcontroller (6210-32)................................................................................................... 1-7
1.6.2. Video Processing (6210-30) .............................................................................................. 1-8
1.6.3. Colour Frame Detector (6210-32)...................................................................................... 1-8
1.6.4. VITC Generator Logic ........................................................................................................ 1-9
1.6.5. High Speed LTC Reader (6211-31) ................................................................................... 1-9
Figures
Figure 1-1: S621 Block Diagram.................................................................................................1-1
Figure 1-2: Line Selection ........................................................................................................... 1-3
Figure 1-3: BCD Encoding of DIP Switch ................................................................................... 1-4
Figure 1-4: Message Select Codes............................................................................................. 1-5
Drawings Dwg. #
LTC Reader Sub-Module 6211 ----------------------------------------------------------------------------621-81C
VITC Keyer Circuit ---------------------------------------------------------------------------------------- 6210-30C2
Logic Diagram---------------------------------------------------------------------------------------------- 6210-32C2
LTC Reader Sub-Module---------------------------------------------------------------------------------- 6211-30E
6211/7202 Sub-Module Component Layout --------------------------------------------------------- 6211-80E
603/6031 I/O Modules ------------------------------------------------------------------------------------- 6030-30A
6031 Component Layout ---------------------------------------------------------------------------------- 6031-81E
6031 I/O Module Power Supply ------------------------------------------------------------------------- 6031-31A
6031/6051 Stand Alone Rear Panels --------------------------------------------------------------M6000-58RL
Parts Lists List #
VITC Generator ....................................................................................................................... BAM6210VG
LTC Reader Suib-Module ..........................................................................................................BAS6211LR
Stand Alone I/O Board (Parallel) ...............................................................................................BAM6031IO
Stand Alone EV Bloc Enclosure .........................................................................................MA6000SINGLE
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TABLE OF CONTENTS ii

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1. MODEL S621 VITC GENERATOR/TRANSLATOR
This microcontroller based module is a full featured vertical interval time
code (VITC) generator. Easily accessible DIP switches are used to preset
parameters such as VITC line numbers, 2,4, or 8 field locking, drop frame
and source ID code. An optional LTC reader sub-module upgrades the
S621 to an LTC to VITC translator with sophisicated error bypass
functions. Remote control inputs permit generator reset/start, user bit
transfer and tally control. (used for ON AIR indication in source ID
applications) In addition, 6 uncommitted inputs are available for remote
control of downstream equipment via the video path. Figure 1-1 shows a
functional block diagram of the S621 module.
Figure 1-1: S621 Block Diagram
1.1. INSTALLATION
All connections to the S621 are made on the rear panel. During set-up it
may be necessary to remove the module from its enclosure to set up DIP
Switches. Each module is held in the chassis by two quarter turn screws to
allow for easy removal of the module. Care must be taken in aligning the
module in the card guides and making sure the board connector is properly
seated.
MODEL S621 VITC GENERATOR/TRANSLATOR 1-1

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1.1.1. Power Requirements
Power requirements are 12 volts DC
1.1.2. Video Input and Output
The generator must be locked to a stable 1 volt p-p composite video source
applied to the video input loop. The S621 inserts VITC on the same video
used to provide frame synchronization to the generator. The internal sync
separator has a high impedance input tapped off the loop through,
therefore, the input must be terminated with 75 ohms at the end of the line.
When the S621 senses a stable video input, the µP OK LED will be on.
When no video is present, it will be flashing on and off. Program video with
VITC inserted on the selected lines is available on two separate outputs.
1.1.3. LTC Input and Output
A loop through consisting of two 1/4" stereo phone jacks is provided as an
input to the LTC reader. When using an unbalanced input to the reader,
the signal should be applied to the tip of the phone plug. Normally, the
unused input (ring) should be connected to ground (sleeve). Code should
be applied to the INP connector. The OUTP connector is provided as a
convenient way of daisy chaining several modules together.
1.1.4. Parallel Remote Control
A nine pin subminiature 'D' connector is provided on the rear panel, for
remote control of the generator functions. The inputs are activated by a
connection to ground. The pin connections are described below:
Pin Name Description
5 REM 1 Remote control input #1
9 REM 2 Remote control input #2
4 REM 3 Remote control input #3
8 REM 4 Remote control input #4
3 REM 5 Remote control input #5
7 REM 6 Remote control input #6
2 REM 7 ON AIR Tally input
6 GND Ground
1 REM 8 Generator Start/Reset
1.2. LINE SELECTION
Switch positions 1 to 4, and 5 to 8 of the rightmost DIP switch (SW 3)
select the video line numbers for placement of the first and second lines of
VITC respectively. It is recommended that two non-adjacent lines be used,
however, adjacent lines and a single line (selected when both line numbers
MODEL S621 VITC GENERATOR/TRANSLATOR 1-2

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are the same) are permitted. Figure 1-2 shows the switch settings and the
corresponding video line numbers.
O N
12 3 4
VITC
LINES
(5) (6) (7) (8)
Off Off Off Off 6
Off Off Off On 7
Off Off On Off 8
Off Off On On 9
Off On Off Off 10
Off On Off On 11
Off On On Off 12
Off On On On 13
On Off Off Off 14
On Off Off On 15
On Off On Off 16
On Off On On 17
On On Off Off 18
On On Off On 19
On On On Off 20
On On On On 21
Figure 1-2: Line Selection
"On NTSC units, If the switches are set for lines 6-10, then line 10 will be
selected. If the switches are set for line 21, then line 20 will be selected.
1.3. SOURCE IDENTIFICATION ENCODING
The two leftmost 8 position DIP switches provide an easy method of
presetting unique source identification codes into the user bits. Each 8
position switch is configured as a pair of 4 position switches, each one
encoding a bcd value as shown below.
MODEL S621 VITC GENERATOR/TRANSLATOR 1-3

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O N
12 3 4
BCD
VALUE
(5) (6) (7) (8)
Off Off Off Off 0
Off Off Off On 1
Off Off On Off 2
Off Off On On 3
Off On Off Off 4
Off On Off On 5
Off On On Off 6
Off On On On 7
On Off Off Off 8
On Off Off On 9
Figure 1-3: BCD Encoding of DIP Switch
1.3.1. Message Number Switch
Positions 2 to 4 and 5 to 8 of the leftmost DIP switch (SW 1) provide BCD
encoding for the 10x and 1 x digit of the message number respectively. Of
the 79 possible messages, only number 0 through 63 are valid. Any invalid
switch settings will be set to the maximum message number (63). Figure
1.4 below shows the standard messages, as they are decoded by the VITC
reader and their respective codes. Custom messages may be installed in
the readers at the factory by a PROM change.
Position 1 of the message number switch selects whether the user bits
from the optional LTC reader or source ID user bits will be inserted into the
VITC. Remote control input #8 overrides the setting of the position 1
switch. When it is grounded it reverses the setting of the position 1 switch.
When the LTC reader option is not fitted, source ID user bits are always
inserted. In this case, position 1 switch is used for the generator mode
(see section 1.5).
MODEL S621 VITC GENERATOR/TRANSLATOR 1-4