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evertz S623 Instruction Manual

Time code reader with serial i/o
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© Copyright 1988, 1991, 1993
EVERTZ MICROSYSTEMS LTD.
3465 Mainway, Burlington, Ontario, Canada, L7M 1A9
Phone: 905-335-3700
BBS:
905-335-9131
Internet: Tech Support: eng@evertz.com
Sales: sales@evertz.com
Web Page: http://www.evertz.com
Revision 1.1.1, April 1993
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.
permission of Evertz Microsystems Ltd. Copies of this guide can be ordered from your Evertz products
dealer or from Evertz Microsystems.
MODELS S623, S623-VIR, S623-EDL
TIME CODE READER with SERIAL I/O
INSTRUCTION MANUAL
Fax:
905-335-3573
No part of this publication may be reproduced without the express written

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  • Page 1 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.
  • Page 2 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...
  • Page 3 EV-BLOC REVISION HISTORY REVISION DESCRIPTION DATE Original issue - preliminary release 7/88 1.0.1 Manual Change Sheet S623-1 6/89 Reformatted, schematic up-dates 1/91 1.1.1 Schematic revisions as follows: 4/93 OLD DWG. NEW DWG. 611-80K 6110-80L 6110-30K 6110-30L ADDITION 6111-80F Component Layout...
  • Page 4 EV-BLOC This page left intentionally blank...

  • Page 5: Table Of Contents

    EV-BLOC TABLE OF CONTENTS INTRODUCTION ..........................1-1 INSTALLATION ..........................2-1 2.1. LTC INPUT AND OUTPUT ......................2-1 2.2. READER VIDEO INPUT......................2-1 2.3. SERIAL REMOTE CONTROL....................2-1 OPERATION .............................3-1 3.1. LTC/VITC SELECTION ......................3-1 SERIAL PORT OPERATION ......................4-1 4.1. COMMUNICATION PROTOCOL .....................4-1 4.2. CONTINUOUS BROADCAST MODE ..................4-1 4.3.
  • Page 6 7.2. INSIDE THE 4600T:REMOVING THE FRONT PANEL ............7-1 7.3. MOUNTING ..........................7-2 Figures Figure 1-1: Model S623 Block Diagram....................1-2 Figure 4-1: Serial Protocol State Diagram ....................4-1 Figure 5-1: Editor Format Output......................5-3 Figure 5-2: Edit Modes & Types ......................5-5 Figure 5-3: Evertz Format EDL Output ....................

  • Page 7: Introduction

    Both RS-232-C and RS-422 levels are supported. Reader data may be sent continuously, or on request only. In addition, the computer can set up various operation modes. The S623 reader module is available in three versions: Model S623: LTC Reader Model S623-VIR: LTC/VITC Reader...

  • Page 8: Figure 1-1: Model S623 Block Diagram

    EV-BLOC All versions of the S623 are equipped with a regenerated LTC output from the incoming code, and a serial I/O port for connection to a computer or printer. Figure 1-1: Model S623 Block Diagram INTRODUCTION Page 1-2...

  • Page 9: Installation

    EV-BLOC INSTALLATION Each S623 module is housed in a compact enclosure suitable for table or shelf mounting. An external 12 VDC (300 mA) power adapter must be connected to provide power to the S623 reader. All the necessary connectors are on the rear panel.
  • Page 10 EV-BLOC Name Description RS-232 Transmit Frame Ground Receive Common Receive “A” & RS-232 Receive “B” Transmit “B” Transmit “A” Transmit Common Frame Ground When pin 8 is connected to an RS-232-C level signal, pin 3 should be connected to ground (pin 4) The default data format used is 9600 Baud, 8 data bits, even parity, one stop bit.

  • Page 11: Operation

    EV-BLOC OPERATION 3.1. LTC/VITC SELECTION three position toggle switch mounted front panel (LTC/AUTO/VITC) selects the reader operating mode. The user may select either an LTC or VITC only mode or the AUTO switch-over mode. The automatic mode allows the microcontroller to dynamically switch to the other reader if the transport speed exceeds the recovery range of the currently selected reader.
  • Page 12 EV-BLOC This page left intentionally blank OPERATION Page 3-2...

  • Page 13: Serial Port Operation

    (10 msec) undefined command, etc) T(NAK) Figure 4-1: Serial Protocol State Diagram 4.2. CONTINUOUS BROADCAST MODE The S623 reader immediately enters the continuous broadcast state upon power-up. In this mode, the S623 reader sends a response message once SERIAL PORT OPERATION...

  • Page 14: Message Format

    To re-enter the continuous broadcast mode, send an ESC (03 hex) character. The S623 responds with an ACK (04 hex) character and enters the broadcast mode. For example, if the current LTC reader time code was 12:45:30:00 and the...
  • Page 15 ARGUMENT single byte of data only if required by COMMAND If the command message was not accepted by the S623 reader due to a checksum error, parity error or an invalid command, the S623 reader will respond with a NAK (05 hex) character and re-enter the SELECT state.

  • Page 16: Data Formats

    EV-BLOC MINUTES HOURS STATUS 1 STATUS 2 CHECKSUM 4.4. DATA FORMATS 4.4.1. BCD Time Data BCD time data is transmitted as four packed BCD bytes with the frames byte transmitted first. The time code status flag bits (i.e.: drop frame, colour frame etc.) are extracted before transmission but are available in the STATUS flags data.
  • Page 17 EV-BLOC Field Mark Flag (VITC) NTSC units: Not used at this time bit 5 PAL units: Not used at this time NTSC units: Binary Group Flag 2 bit 6 LTC FLAG - Indicates longitudinal time code being read bit 7 VITC FLAG - Indicates vertical interval time code being read The Binary group flag bits are defined as follows: Bin Grp...

  • Page 18: 4.4.3. User Bit Data

    4.5. COMMANDS Following is a list of the commands understood by the S623 reader. If invalid commands are sent to the S623, it will respond with a NAK (05 hex) character. READ BINARY TIME DATA Returns the current time code data in binary format and the...
  • Page 19 EV-BLOC S623 OPERATING MODE FLAGS bit 0 LTC Reader Enable bit 1 VITC Reader Enable bit 2 Local Lockout Enable bit 3 EDL Output Format (EDL Option) 0=Editor Format 1=Evertz Format bits 4-7 not used, set to 0 READ LINE NUMBER Returns one byte containing the current line number which the VITC Enable is being activated.
  • Page 20 Local lockout is enabled automatically by issuing the enable/disable reader mode commands ENABLE EVERTZ FORMAT Model S623 & 623-VIR: In Broadcast Mode outputs the current time code data in BCD format, the user bit data and the status flags Model S623-EDL: Selects Evertz edit decision list output...

  • Page 21: Edit Decision List

    To properly detect edit points, the S623-EDL must be referenced to the video from the source VTR. Connect the video output from the VTR to the video input of the S623-EDL and provide a 75 ohm termination. This must be done even if you are using LTC from the VTR.

  • Page 22: Two Edit Decision List Formats

    EV-BLOC The S623-EDL has the ability to bypass the reading of the continuous VITC on the lower line numbers and read only the dicontinuous VITC (which identifies the edits) on the higher line numbers. (See section 5.4) 5.2. TWO EDIT DECISION LIST FORMATS...

  • Page 23: User Bit Encoding In Editor Format

    With this convention a total of 100 of the more popular edit identifiers can be used. The S623-EDL uses the first eight codes to identify the MODE of the edit while fixing the TYPE to a CUT. (At first this appears to be an...

  • Page 24: Edit Duration (Ddd)

    100 code identifications and this does not allow us to cross-reference every edit TYPE with each of the seven MODES.) Since most EDIT TYPES are video effects, the S623-EDL convention is to relate them to the VIDEO edit mode, with the exception of the CUT and SPLIT EDIT.

  • Page 25: Figure 5-2: Edit Modes & Types

    The edit DURATION is the time (measured in video frames) it takes for an edit effect to be completed. The S623-EDL software assigns the digit numbers 4, 5 and 6 of the user bits to the duration of the edit taking place.

  • Page 26: Example Of User Bit Encoding

    RS- 232 serial port. The default setting is for the S623-EDL to read VITC on any line number. (i.e.: the lower line numbers will be read if more than one set of VITC is present) (See section 6.5 for information about changing the...

  • Page 27: Evertz Format

    “clean-up” software so as to obtain the data in a format specific to the desired application. In Evertz format, the in and out points are the first and last frame numbers of the edited material. The in and out user bits, are the user bit values at the in and out frames.
  • Page 28 EV-BLOC This page left intenationally blank EDIT DECISION LIST SOFTWARE Page 5-8...

  • Page 29: Technical Description

    6.1. MICROCONTROLLER (6110-30) At the heart of the S623 reader module is an 8031 microcontroller, (MCU) U24. Its three 8 bit bi-directional ports and 8 bit bus provide peripheral interfacing to the rest of the circuits. Program memory is contained on EPROM U23.

  • Page 30: Video Processing (6110-30)

    EV-BLOC amplitude ramp is generated by U12 and associated components. Three quarters of the peak ramp level is used as a reference on comparator U1 to decode the data from the clock transitions. If the next code bit is a 0 then the ramp will exceed the reference before a transition occurs.

  • Page 31: Changing The Power Up Defaults

    EPROM. These facilities are provided for only in versions of the S623 modules with a 2764 (2764a or 27C64) EPROM type. This procedure should only be carried out by qualified technicians or damage may result to the EPROM or other devices on the board.
  • Page 32 VITC reader will recognize code. It should be set as follows: ENTER CODE FIRST LINE FIRST LINE (PAL) (NTSC) All Lines All Lines Default Output Format Model S623 & S623-VIR: TECHNICAL DESCRIPTION Page 6-4...
  • Page 33 This parameter, stored in location 18 (hex) in the EPROM, allows the user to set the default Broadcast mode output format. It should be set as follows: Evertz Format (BCD) ASCII Characters Model S623-EDL: This parameter, stored in location 18 (hex) in the EPROM, allows the user to set the default Edit Decision List output format.
  • Page 34 EV-BLOC This page left intentionally blank TECHNICAL DESCRIPTION Page 6-6...

  • Page 35: 4600T Installation

    EV-BLOC 4600T INSTALLATION REAR PANEL The following connectors are provided on the rear panel for connection into your system. Each slot has the same configuration for its respective module. Timecode Connectors LTC OUT:A ¼"stereo phone jack for output of SMPTE/EBU longitudinal time code from generator.

  • Page 36: Mounting

    EV-BLOC The module in the center is the LTC/VITC reader/character inserter for time code, and the one on the right is the LTC/VITC reader/character inserter for Keykode. To replace the front panel assembly, slide it into place, and turn the quick release fasteners clockwise until they are firmly secured.
  • Page 44 EV-BLOC This page left intentionally blank...

This manual is also suitable for:

S623-virS623-edl

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