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SIERRA VIDEO SYSTEMS Tahoe 2010V User Manual

Tahoe series 20 routing switchers
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SIERRA VIDEO SYSTEMS
Tahoe Series 20 Routing Switchers Models 2010V,
2010VA, 2010VAA, 2010A, 2010AA, 2020V, 2020VA,
2020VAA, 2020A,2020AA
User's Manual

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  • Page 1 SIERRA VIDEO SYSTEMS Tahoe Series 20 Routing Switchers Models 2010V, 2010VA, 2010VAA, 2010A, 2010AA, 2020V, 2020VA, 2020VAA, 2020A,2020AA User’s Manual...
  • Page 3 T A H O E S E R I E S 2 0 R O U T I N G S W I T C H E R S User’s Manual  Sierra Video Systems P.O. Box 2462 Grass Valley, CA 95945...

  • Page 5: Table Of Contents

    Table of Contents Introduction Before You Begin Warnings & Safety Regulations Communication Protocol Warnings Introduction Cautions Generic Protocol Cautions (continued) Leader and Trailer Power Supply Cords North American Power Supply Cords Troubleshooting International Power Supply Cords EMC Regulatory Notices Introduction Delivery Damage Inspection Power and Indicators Tahoe Family Overview...

  • Page 7: Introduction

    Sierra Video Systems Chapter Introduction Before You Begin There are several terms and acronyms that you should become familiar with before reading this manual. They are shown below. Term/Acronym Definition Crosspoint The electronic switch that assigns one of the inputs on the matrix crosspoint modules to an output.

  • Page 8: Warnings & Safety Regulations

    Sierra Video Systems Warnings & Safety Regulations The information in the following section provides important warnings and safety guidelines for both the operator and service personnel. Specific warnings and cautions may be found throughout this manual. Please read and follow the important safety precautions noting especially those instructions relating to risk of fire, electrical shock and injury to persons.

  • Page 9: Cautions (Continued)

     Only an authorized Sierra Video Systems technician should service the switchers. Any user who makes changes or modifications to the unit without the expressed approval of the Sierra Video Systems will void the warranty. Power Supply Cords...

  • Page 10: Tahoe Family Overview

    Tahoe Family Overview Introduction The Tahoe Family is Sierra Video Systems’ most extensive line of analog routing switchers, setting the standard in mid-sized switchers for more than a decade. Tahoe frames can be populated with limited modules, providing flexibility for future expansion.

  • Page 11: Model Suffix Designations

    Take time to familiarize yourself with the location of your switcher model features. Tahoe Family Series 20x Switchers Component  804030 Frame  2020V, 2020VA, 2020VAA, 2020A, 2020AA, 2010V, 2010VA, 2010VAA, 2010A, 2010AA Frame  Video and /or Audio contained in one frame  Power Supply(ies) ...

  • Page 12: Frame 804030

    Sierra Video Systems Frame 804030 Note The Tahoe model shown here and in the subsequent sections are fully populated video and / or audio matrices. In some cases, these frames may be configured with fewer video channels and perhaps no audio. i.e. Tahoe models also offer redundant power supplies.

  • Page 13: Factors Affecting Quality Of Results

    CAUTION! Only an authorized Sierra Video Systems technician can service the switchers. Any user who makes changes or modifications to the unit without the expressed approval of the manufacturer will void the warranty Use the proper AC voltage to supply power to the switcher.

  • Page 15: Installation

    Sierra Video Systems Chapter Installation Introduction Carefully inspect the frame to ensure that there has been no shipping damage. Make sure all shipping material is removed from the router frame. The routing switcher described in this manual can be rack mounted in a standard 19"...

  • Page 16: Connecting To Video Devices

    Sierra Video Systems Connecting To Video Devices Video sources and output devices (such as monitors, or recorders) may be connected to the routing switchers through the BNC type connectors located on the back of the unit. Keep in mind that the output signal format will be that of the input signal format.

  • Page 17: Balanced/Unbalanced Audio Connections

    Tahoe Series 20 Balanced/Unbalanced Audio Connections All audio sources from the routing switcher are balanced audio. Connect the balanced audio to the balanced input of your destination device(s). If this is a 2-channel system used for stereo audio, ensure that you keep the same phase relationship.

  • Page 18: Audio Follow Video And Breakaway Audio Configurations

    Sierra Video Systems Audio Follow Video and Breakaway Audio Configurations Video and Audio signals are switched by separate crosspoint modules. Audio can be switched following the video or separately after the breakaway. Audio channels can be configured to “breakaway” from each other (left and right, ect.).

  • Page 19: Connecting Peripherals

    Tahoe Series 20 Connecting Peripherals Control panels, sync inputs, and power are all connected to the rear of the frame. The peripherals area may vary depending on the model size and type. Tahoe series routing switchers offer redundant power supplies but must be specified prior to order.

  • Page 20: Sync Input

    Sierra Video Systems Sync Input There are two BNC connectors labeled "SYNC". This is a "looping" input for sync referencing. Connect either composite sync or video with sync to either BNC. If desired, use the second BNC to loop the signal to another device. If the loop is not used, terminate the second BNC with 75 ohms.
  • Page 21 Tahoe Series 20 Note: Changing any Dip Switch causes an automatic reset after a few seconds.

  • Page 22: Names

    Sierra Video Systems Names Source, Destination, and level names can be applied using two methods. Names can be applied using the GRIP program (See the GRIP manual for details on naming), or names can be applied using the serial port (See the Generic Protocol section of this manual).

  • Page 23: Operation

    Sierra Video Systems Chapter Operation Control System Overview The Tahoe Family’s three port control system incorporates many powerful features, while retaining control compatibility with many leading third party control systems and with earlier generation SVS routing switchers. The control system uses an intuitive interface for routing switcher control and configuration, passwording, salvo setup, multiple input/output configuration and name configuration.

  • Page 24: Control Panels (Rs-485)

    Sierra Video Systems Host & Terminal Port Installation RS-232 RS-422 Ground Ground Transmit (-) Transmit Receive (+) Receive (Tied to pin 8) Not used Not used Not used Not used Not used Not used Not used Transmit (+) Receive (-)

  • Page 25: Communication Protocol

    Sierra Video Systems Chapter Communication Protocol Introduction The protocol uses the 7-bit ASCII character set, usually sent over an RS232-C or RS422 serial link — 9600 bps is recommended with 8 data bits and no parity. The protocol is compact, with few characters required to cause switch changes to occur. It is also human-readable and thus easy to understand and use.
  • Page 26 Sierra Video Systems The protocol uses only 7-bit ASCII characters. The 8th bit of received characters is treated as if it is 0. Within the command string, certain ASCII characters may be present and are ignored: any ASCII character whose code is less than the SPACE character (includes all control characters and the SPACE character) and the DEL (ASCII 7F) character.

  • Page 27: Leader And Trailer

    Tahoe Series 20 Leader and Trailer The simplest possible command string would be “**!!” which consists of the leader and trailer characters but no command between them. This command string would generate the response “**OK!!” followed by “CR”. This can be useful for verifying that the serial link to the switcher is operational.
  • Page 28 Sierra Video Systems “R”: Router Reset Use this command to force the routing switcher to reset, by sending it the command "RESET". If an administrator password has been set (using the “G ADMIN_PASSWORD” command described later in this document), then the password must be sent in a “K”...
  • Page 29 Tahoe Series 20 might return the following string: ** L64,3,32,VIDEO~AudioL~AudioR~~ OK !!<CR> indicating that the router has 64 outputs, 3 levels, and 32 inputs, and the levels are named "VIDEO", "AudioL", and "AudioR". “O”: Output Status Inquiry The command "O" requests that matrix status information for a single output be returned to the host.
  • Page 30 Sierra Video Systems Thus, a 21-level 16 output router would generate 2x16 = 32 substrings of status command output. The length of each substring depends on the size of the particular switcher involved. Larger switchers use bigger numbers for inputs, outputs, and levels.
  • Page 31 Tahoe Series 20 password is the one that must be sent in the “K” command to permit the router configuration to be changed, while in the latter case the password that was used to lock the output is the one that must be sent in the “K” command to permit the take to occur. Refer to the “B”...
  • Page 32 Sierra Video Systems establishes password 9664 as the password for remote address 139. The response to this command string would be: ** M139 OK !! If remote address 13 later sends the command: ** M139 Y8,27 !! to request that output 8 be connected to input 27, the router would check to see if output 8 has been locked.
  • Page 33 Tahoe Series 20 more immediate feedback to the controlling device that is sending a crosspoint change command. The U1 mode of operation is provided for compatibility with older control systems. “V”: Connect Levels The command "V" is used to request that a connection be made. It must be followed by an output number, a comma, and a comma-separated list of input numbers, one for each level, up to the number of levels in the router.
  • Page 34 Sierra Video Systems **X8, 3, 2!! This string says that a connection is to be made between output 8 and input 3 on level 2. If the level number is specified as “0”, this means that the connection is to be made on all levels (AFV).
  • Page 35 Tahoe Series 20 says that input 5 is to be connected to output 1 on all levels, then a delay of 300 (=200+100) sync intervals is to occur, then input 6 is to be connected to output 1 on all levels, then a status response is to be returned.
  • Page 36 Sierra Video Systems “B”: Output Lock inquiry or change The command "B" requests that lock information for the specified output be returned to the host, and optionally that the lock status of that output be changed. Whenever the router receives a “B” command, it sends one back.
  • Page 37 Tahoe Series 20 Since output lock status changes frequently, it is not really useful to cache output lock status for outputs, so the output lock version number is not really useful. For example, to request whether or not output 21 is locked: ** B21,0,0 !! The response might be: ** B21,0,0 OK !!
  • Page 38 Sierra Video Systems however, will add one more field to the minimum possible delay. Thus, delayfields specifies the number of full fields of delay between end-of-crosspoint-command-string- received and crosspoint-switch-occurs. Note that the actual minimum value of delayfields depends on the particular router model.
  • Page 39 Tahoe Series 20 Basic “G” Command: Action From Syntax Modify Host G command_name { arguments… } ~ Query Host G command_name { arguments… } ~ Query Response Router G command_name { arguments… } ~ Modify is Protected: Report Changes: The command "G" is used to query or modify a router configuration parameter or parameters.
  • Page 40 Sierra Video Systems Every “G” command must be terminated with a tilde (‘~’) character. This allows a command parser to ignore any received “G” command that has a command_name that it doesn’t know about. The “G” commands available for any given router may vary, depending on the router model.
  • Page 41 Tahoe Series 20 VAR1: Modify or query single-dimensional array variables Action From Syntax Modify Host VAR1,<varname>,<index>,<value>[,<value>…]~ Query Host G VAR1,<varname>,<index>~ Query Response Router (same as Modify) Modify is Protected: Report Changes: The “G VAR1“ command is used to change or query single-dimensional array variables that control specific features of the router.
  • Page 42 Sierra Video Systems VAR2: Modify or query two-dimensional array variables Action From Syntax Modify Host VAR2,<varname>,<index1>,<index2>,<value>[,<value>…]~ Query Host VAR2,<varname>,<index1>,<index2>~ Query Response Router (same as Modify) Modify is Protected: Report Changes: The “G VAR2“ command is used to change or query two-dimensional array variables that control specific features of the router.

  • Page 43: Troubleshooting

    If not, turn the power switch off and on again to reset the switcher. If the following recommended actions still do not result in satisfactory operation, please consult your Sierra Video Systems Dealer. Power and Indicators Problem...

  • Page 44: Video Signal

    Sierra Video Systems Video Signal Problem Remedy No video at the  Confirm that your sources and destination device are powered on and output device, connected properly. Video signals connected to the input of the switcher regardless of should be of an identical signal format as the output of your source. Video input selected.

  • Page 45: Audio Signal

    Tahoe Series 20 Audio Signal Problem Remedy No audio at the  Confirm that your sources and destination device are powered on and destination connected properly. Audio signals connected to the input of your switcher device, should be properly wired from the output of your source. Audio signals regardless of connected to the output of your switcher should be properly wired to the input source selected...

  • Page 46: Switching Malfunctions

    Sierra Video Systems Switching Malfunctions Problem Remedy The switcher Malfunction in the particular source or cable assembly. succeeds in NOTE: switching a The most common failure mode in transferring the signal of an audio source is a number of break in the connecting wire.

  • Page 47: Theory Of Operation

    “daisy-chained” on this network. A variety of different panel types can be used, and are available from Sierra Video Systems. The RS-485 network can be operated at either 9600 baud or 31250 baud. The factory default baud rate is 31250.
  • Page 48 Sierra Video Systems described in the Communication Protocol section of this manual and can be addressed using the SVS windows program “GRIP”. Two 8-bit dip switches allow the user to make configuration choices. See the section on Dip Switch settings.
  • Page 49 Tahoe Series 20 The matrix interface has special timing requirements. These time delays are too long to be provided by the MC68302 wait state or DTACK generator. This special timing is generated externally using U14, U15, and U12. The basic operation of the circuit is U14, which counts up to 32 starting from 0 whenever a CS3 cycle is initiated.

  • Page 50: Video Crosspoint Module 504034

    Sierra Video Systems impedance output to sync separator Q1. The output of Q1 is inverted sync. U23E and U23F form a low pass filter which separates vertical sync from the signal. U23D performs several functions. When sync is present at its input, it acts as an inverter. If no sync is present at the output of U23E, it may be in either state it is AC coupled by C1 to U23D.

  • Page 51: Audio Crosspoint Module 504035

    Tahoe Series 20 The gain of the output amplifier is adjusted by a 15 turn control (R7). R9, a 75 ohm 1% resistor provides the required output line driving impedance. Control Circuits The 504034 is usually controlled by a centralized control processor module which may be in the same frame as the 504034 or in another frame in the overall system.

  • Page 52: Power Supply

    Sierra Video Systems damage. Second, it protects the bus in the system from a failure on an individual 504035 module. U6 is a 4 line to 16 line decoder. Its output determines which bus on the 504035 is being addressed by the central controller. The strobe input (J1-6S) is centered timing wise in the data time that appears on the other logic lines to the 504035.

  • Page 53: Schematics

    Tahoe Series 20 Schematics 504001...
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  • Page 61: Specifications

    Sierra Video Systems Chapter Specifications Audio Specifications Audio Nominal Input Level +4 dbm Maximum Input Level + 24 dbm Input Impedance 15k ohms, balanced Common Mode Rejection ≥ 40 db @ 60 Hz Nominal Output Level +4 dbm Maximum Output Level...

  • Page 62: Video Specifications

    Sierra Video Systems Video Specifications Video Nominal Input Video Level 1 V p-p Maximum Input Video Level 1.5 V p-p Input Impedance 75 ohms Input Return Loss ≥ 40 db @ 5 MHz Superimposed DC ± 5 V External Sync...

  • Page 63: Software Upgrades

    Sierra Video Systems Chapter Software Upgrades Introduction From time to time software upgrades will be available from SVS. Check our web site (sierravideo.com) for available downloads, or contact the factory. Tahoe series router processors can be upgraded via the 9 pin serial port on the router’s Host port.

  • Page 65: Warranty

    Sierra Video Systems Chapter Warranty A. General Buyer assumes all responsibility for ascertaining the suitability of Sierra Video (hereinafter "SVS") products for Buyer's intended use. No product sold by SVS is designed or manufactured for use in any manner or under any conditions other than those described in SVS's instruction manuals and other printed material for each particular product.
  • Page 66 No waiver, alteration, or modification of any of the provisions hereof shall be binding unless in writing and signed by an authorized Officer of SVS. NOTE: All products returned to SVS for service must have prior approval. Return authorization requests may be obtained from your SVS dealer. © Sierra Video Systems...

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