Black Box 1123A User Manual

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Models AC1120A 1121A 1122A 1123A *

16x16 and 8x8 VGA/HDTV Video Matrix Switch with Front Panel, RS232, and Optional Audio & IP Control

*This user’s manual pertains to a number of Black Box 16x16 and 8x8 video matrix switches. Some models have audio switching and IP control port, and some models do not.

UMA1149 Rev. A

CUSTOMER

SUPPORT INFORMATION

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday:877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call724-746-5500 or fax724-746-0746 Mail order:Black Box Corporation, 1000 Park Drive, Lawrence, PA15055-1018

Web site: www.blackbox.comE-mail: info@blackbox.com

8x8 and 16x16 VGA / HDTV Matrix Switch with Audio, RS232 & IP Control

TRADEMARKS USED IN THIS MANUAL

BLACK BOX and its logo are registered trademarks of Black Box Corporation.

Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

FCC and Canadian Dept of Communications Radio Frequency interference statements

This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been designed to comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le brouillage radioélectrique publié par le ministère des Communications du Canada.

European Union Declaration of Conformity

This product complies with the requirements of the European EMC directive 89/336/EEC

Normas Oficiales Mexicanas (NOM)

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Model AC1120A, AC1121A, AC1122A, AC1123A

 

Table of Contents

 

1.0 GENERAL.....................................................................................................

4

1.1 FEATURES....................................................................................................

4

2.0 INSTALLATION..........................................................................................

5

2.1 INPUT AUDIO & VIDEO CONNECTIONS ........................................................

5

2.2 OUTPUT AUDIO & VIDEO CONNECTIONS.....................................................

6

2.3 POWER INPUT CONNECTION .........................................................................

7

2.4 CONTROL INPUTS.........................................................................................

7

2.4.1 Matrix with RS-232Control (no IP) ....................................................

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2.4.1.1 Primary RS-232Control Port ....................................................................

8

2.4.1.2 Auxiliary RS-232Control Port..................................................................

8

2.4.2 Units with IP control............................................................................

9

3.0 OPERATION ................................................................................................

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3.1 FRONT-PANEL BUTTONS AND INDICATORS..................................................

9

3.1.1 Viewing Audio and Video Routings or “Ties”...................................

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3.1.1.1 Viewing ties by Video and Audio ...........................................................

10

3.1.1.2 Viewing ties by Video only.....................................................................

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3.1.1.3 Viewing ties by Audio only.....................................................................

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3.1.2 Making Audio and Video Routings or “Ties”....................................

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3.1.2.1 Making a tie by Input ..............................................................................

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Video and Audio to follow each other.................................................................

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Video only or Audio only....................................................................................

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3.1.2.2 Making a tie by Output............................................................................

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Video and Audio to follow each other.................................................................

13

Video only or Audio only....................................................................................

13

3.1.3 Recalling Presets (routing patterns)..................................................

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3.1.4 Saving Presets (routing patterns) ......................................................

14

3.1.5 Disconnecting all AV outputs (blank preset) .....................................

14

3.1.6 To reset system to factory defaults.....................................................

14

3.1.7 Using the Front Panel VU meter .......................................................

14

3.2 CONTROL COMMANDS (RS-232AND IP) ...................................................

16

3.2.1 Naming Functions..............................................................................

17

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8x8 and 16x16 VGA / HDTV Matrix Switch with Audio, RS232 & IP Control

3.2.2 Routing Functions..............................................................................

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3.2.2.1 To make a video tie: ................................................................................

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3.2.2.2 To make an audio tie: ..............................................................................

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3.2.2.3 To make a synchronized audio/video tie: ................................................

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3.2.3 Preset Pattern Saving and Routing Functions...................................

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3.2.3.1 To recall a saved preset Video routing pattern: .......................................

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3.2.3.2 To save the current Video routing pattern to a preset:.............................

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3.2.4 Restoring Factory Defaults................................................................

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3.2.5 Rebooting the System .........................................................................

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3.2.6 To Read Audio Volume Units (VU) of output #1 ...............................

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3.2.7 To Read Temperature inside the Matrix ............................................

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3.2.8 To Read the Firmware Version..........................................................

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3.2.9 To Read Supply Voltages ...................................................................

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3.2.10 Real Time Clock Functions..............................................................

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3.2.10.1 To set date & time: ................................................................................

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3.2.11 Scheduling Auto recall of Preset Patterns .......................................

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3.2.11.1 To set a schedule ...................................................................................

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3.2.12 IP Control Basics.............................................................................

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3.2.12.1 IP Setup Commands using the RS-232Serial Port ................................

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3.2.12.2 IP Configuration through port 23 ..........................................................

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4.0 MAINTENANCE AND TROUBLESHOOTING....................................

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4.1 MAINTENANCE ..........................................................................................

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4.2 TROUBLESHOOTING ...................................................................................

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4.2.1 Calling Black Box ..............................................................................

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4.2.2 Shipping and Packaging ....................................................................

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5.0 SPECIFICATIONS ....................................................................................

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APPENDIX 1 – FRONT PANEL QUICK REFERENCE GUIDE ..............

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APPENDIX 2 – COMMAND SUMMARY ....................................................

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Model AC1120A, AC1121A, AC1122A, AC1123A

About This Manual

This user’s manual covers several variations of Black Box’s 8x8 and 16x16 VGA/HD matrix switches. Four configurations of the matrix are discussed in this user’ manual per the table below. Since this is an all-encompassinguser’s manual, portions of this guide may not pertain to any specific unit.

AC1120A

8x8

VGA Matrix Switch With Serial Control

 

 

 

AC1121A

8x8

VGA & Audio Matrix Switch with IP and Serial Control

 

 

 

AC1122A

16x16

VGA Matrix Switch with Serial Control

 

 

 

AC1123A

16x16

VGA & Audio Matrix Switch with IP and Serial Control

 

 

 

 

*** Upon power-upthe switches output a string on theirRS-232port that identifies the unit’s capabilities such as:BBox-I-A-8-8(I=IP port, A= Audio,8-8= number of inputs and outputs respectively)

1.0 General

The AC1120A through AC1123A are compact high-endmatrix switches for video and audio. The matrices are used forcross-pointswitching of video and audio signals. The switch provides 8 or 16 video (and audio) outputs, each capable of independently displaying any of 8 or 16 inputs in any combination. Additionally, the outputs can be blanked out and/or muted. The Matrices can be used in TV broadcasting environments,multi-mediaconference halls, public facilities, large display projects, schools, courtrooms, and command & control centers.

The units are compatible with PC video from 640x480 to 1920x1600 or analog SD/HDTV Component Video (YPbPr) from 480i to 1080p. The Matrix can be controlled in 3 ways: manually using the buttons on the front panel, through one or two serial RS232 control ports, or remotely via IP port.

1.1 Features

Allows cross-pointswitching of PC or HD video and audio signals Multiple control methods including front panel, serial and IP ports Switched output can be blanked or muted

Wide bandwidth to support PC resolutions to 1920x1200 or HD to 1080p Balanced stereo audio outputs allow interference free connections

VU meter (sound level) bar graph display on the front panel Battery-backedReal-timeclock on all models with scheduling capability Monitors system voltage levels and temperature

Alerts user with a blinking CHECK light if system faults are detected Built-inuniversal power supply

Compact, Rugged, Reliable, and Economical

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8x8 and 16x16 VGA / HDTV Matrix Switch with Audio, RS232 & IP Control

2.0 Installation

The matrix is housed in a 2RU 19” wide rack mountable enclosure. All of I/O, control, and the power connections are on the rear of the unit.

Figure 1 – Rear panel of AC1123A showing all the connections

2.1 Input Audio & Video Connections

Figure 2 - Audio and video inputs on AC1123A

The video connectors are HD15 female. These are compatible with PC’s VGA video signal (RGBHV). The Matrix is also compatible with analog SD or HDTV signals (YPbPr) with resolutions from 480i to 1080p. To connect these types of signals to the Matrix, HD15 to 3-RCAcables may be required.

Technical Note about the Video Inputs

The HD15 inputs of the matrix handle only the color and sync signals. EDID (extended display identification data) is absent. EDID is normally used by the source PC to read pertinent information from the connected display. This information includes a list of the resolutions that are supported by the LCD. If EDID is not implemented, the source PC is unaware of the specific LCD connected to it. Generally this is not a problem since in the absence of EDID, most PC’s allow the user to select from a set of default resolutions for output. Some PC’s may not output any video signal, or only allow limited resolution settings with the absence of EDID . One way to resolve this is to change the display settings of the PC to show all modes and not detect Plug and Play LCD. The procedure for doing this varies depending on the operating system and the video card in the PC. It is generally found under: Control Panel > Display Settings > Advanced > Monitor tab. Alternatively a pass-throughEDID emulator can be used. This a piece of hardware that is sold separately.

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Model AC1120A, AC1121A, AC1122A, AC1123A

The audio input on the basic unit uses standard 3.5mm mini-stereoconnectors. To use these with PC audio, standardmale-to-maleaudio extension cables would be required. To connect from typical TV sources with separate right and left connectors, 3.5mm male to 2 RCA cables would be needed.

Technical Note about the Audio Inputs

Since the audio inputs are unbalanced (single ended), the ground reference of the source has to be the same as the matrix. Of course the cable connecting the two is tying the grounds across but if there are currents flowing in the ground it can create potential differences that would manifest as noise. The quality of grounding at the audio source and the matrix are important. For example if the input source is a desktop PC, as long as the PC is properly grounded and the audio cable length is not excessive, you can expect good results. On the other hand if the input is a notebook PC running on battery, there is no ground reference at the source so it gets its reference through the audio (and video) cable connection to the matrix. This should also be okay. However if it is plugged in through its external power brick, noise can be induced. This is because most notebook power supplies do not properly provide an AC ground path to the system ground (some only have only 2 prong AC cords). The switching power supply circuit will inject noise into the audio lines. In this case the solution may be to attach a low resistance ground strap to the notebook. The other option for eliminating the noise is to use a stereo audio Balun (or isolator). The Balun essentially couples the audio through a transformer so the audio grounds are isolated. Baluns can also cure noise pickup in long cable runs.

2.2 Output Audio & Video Connections

Figure 3 – Standard matrix audio and video outputs

The video output connectors are HD15 female. These are compatible with PC’s VGA video signal (RGBHV). The Matrix is also compatible with YPbPr HDTV signals with the use of HD15 to 3 RCA adapter cables.

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8x8 and 16x16 VGA / HDTV Matrix Switch with Audio, RS232 & IP Control

The audio outputs of the matrix are balanced. So a + and a – are provided for each side. There is also a ground connection available. If you are going to connect the matrix output to a single-endedaudio device (one with RCA or phono connectors), then use the + of the left, + of the right, and ground. On the other hand, if you will be connecting the output to professional audio gear it is best to use the differential + and – (balanced) outputs of each side that offer immunity to noise.

Figure 4 – Typical balanced audio output connector

The balanced audio outputs are provided on detachable screw-terminals.Mating connectors for all outputs are also provided.

2.3 Power input connection

The matrix has a built-inuniversal power supply. The AC input connector on the rear of the matrix is an IEC320 / C6 and is always shipped with a North American power cord (shown below). If you want to use the matrix in a country with different plug type, you should purchase your own cable or adapter. The Matrix supports both 110 V, 60 Hz and 220 V, 50 Hz power systems. There is a power on indicator light on the front panel

Figure 5 – End of IEC320 / C6 power cord

2.4 Control Inputs

The matrix can be controlled from either RS-232or through IP.

2.4.1 Matrix with RS-232Control (no IP)

The AC1120A and AC1122A (without IP feature) actually have 2 separate and independent RS-232control ports.

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Model AC1120A, AC1121A, AC1122A, AC1123A

The main RS-232port is on a screw terminal and the auxiliary port is on an RJ45.

Caution on RJ45 Control Input

Since the matrices with the IP control and those without both have an RJ45 connector next to the RS-232screw terminal, it is easy to confuse their function. The function of the connector should be labeled above it. A sure way to tell if the RJ45 control input is LAN or Serial is by the existence of little LED indicators to the sides of the connector. If the connector has these lights, then it is a LAN connection, otherwise it is anRS-232serial connection.

Figure 6 – IP input versus AuxiliaryRS-232

2.4.1.1 Primary RS-232Control Port

This is a 3-terminalcaptive screw input. A detachable mating connector is provided. The function of each pin is designated on the panel above the connector. Below is a diagram for connection this port to a PC’s DB9 serial port.

Figure 7 – PrimaryRS-232to PC cable

2.4.1.2 Auxiliary RS-232Control Port

The matrix switches without IP control have a secondary serial port that can work independently of the primary port. The user can control the matrix from either or both ports.

The auxiliary RS-232 is on an RJ45. Make sure to not connect this to any LAN devices.The pinout for the auxiliary RS-232 follows the basic EIA-561 for TX RX and Ground. Optional current limited 12v DC may also be provided (max rated output current of 50ma) that can be used to power external keypads or control devices.

Caution High-Voltage

Never open the unit’s cover. Lethal voltages exists inside the unit

Opening the unit also voids the warranty on the unit.

The pinout is shown below.

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