Black Box TV Video Accessories 1121A User Manual

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: Call 724-746-5500 or fax 724-746-0746  
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018  
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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-232 Control (no IP) .................................................... 7  
2.4.1.1 Primary RS-232 Control Port .................................................................... 8  
2.4.1.2 Auxiliary RS-232 Control Port.................................................................. 8  
2.4.2 Units with IP control............................................................................ 9  
3.0 OPERATION ................................................................................................ 9  
3.1 FRONT-PANEL BUTTONS AND INDICATORS.................................................. 9  
3.1.1 Viewing Audio and Video Routings or “Ties”................................... 10  
3.1.1.1 Viewing ties by Video and Audio ........................................................... 10  
3.1.1.2 Viewing ties by Video only..................................................................... 11  
3.1.1.3 Viewing ties by Audio only..................................................................... 12  
3.1.2 Making Audio and Video Routings or “Ties”.................................... 12  
3.1.2.1 Making a tie by Input .............................................................................. 12  
Video and Audio to follow each other................................................................. 12  
Video only or Audio only.................................................................................... 13  
3.1.2.2 Making a tie by Output............................................................................ 13  
Video and Audio to follow each other................................................................. 13  
Video only or Audio only.................................................................................... 13  
3.1.3 Recalling Presets (routing patterns).................................................. 14  
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-232 AND IP)................................................... 16  
3.2.1 Naming Functions.............................................................................. 17  
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3.2.2 Routing Functions.............................................................................. 17  
3.2.2.1 To make a video tie:................................................................................ 17  
3.2.2.2 To make an audio tie: .............................................................................. 17  
3.2.2.3 To make a synchronized audio/video tie:................................................ 17  
3.2.3 Preset Pattern Saving and Routing Functions................................... 18  
3.2.3.1 To recall a saved preset Video routing pattern:....................................... 18  
3.2.3.2 To save the current Video routing pattern to a preset:............................. 18  
3.2.4 Restoring Factory Defaults................................................................ 18  
3.2.5 Rebooting the System......................................................................... 18  
3.2.6 To Read Audio Volume Units (VU) of output #1 ............................... 19  
3.2.7 To Read Temperature inside the Matrix ............................................ 19  
3.2.8 To Read the Firmware Version.......................................................... 19  
3.2.9 To Read Supply Voltages................................................................... 19  
3.2.10 Real Time Clock Functions.............................................................. 19  
3.2.10.1 To set date & time:................................................................................ 19  
3.2.11 Scheduling Auto recall of Preset Patterns....................................... 20  
3.2.11.1 To set a schedule ................................................................................... 20  
3.2.12 IP Control Basics............................................................................. 22  
3.2.12.1 IP Setup Commands using the RS-232 Serial Port................................ 22  
3.2.12.2 IP Configuration through port 23 .......................................................... 25  
4.0 MAINTENANCE AND TROUBLESHOOTING.................................... 28  
4.1 MAINTENANCE .......................................................................................... 28  
4.2 TROUBLESHOOTING ................................................................................... 28  
4.2.1 Calling Black Box .............................................................................. 28  
4.2.2 Shipping and Packaging.................................................................... 29  
5.0 SPECIFICATIONS .................................................................................... 29  
APPENDIX 1 – FRONT PANEL QUICK REFERENCE GUIDE .............. 30  
APPENDIX 2 – COMMAND SUMMARY .................................................... 31  
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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-encompassing user’s manual,  
portions of this guide may not pertain to any specific unit.  
AC1120A  
AC1121A  
AC1122A  
AC1123A  
8x8 VGA Matrix Switch With Serial Control  
8x8 VGA & Audio Matrix Switch with IP and Serial Control  
16x16 VGA Matrix Switch with Serial Control  
16x16 VGA & Audio Matrix Switch with IP and Serial Control  
*** Upon power-up the switches output a string on their RS-232 port 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-end matrix switches for  
video and audio. The matrices are used for cross-point switching 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-media conference 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-point switching 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-backed Real-time clock 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-in universal power supply  
Compact, Rugged, Reliable, and Economical  
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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-RCA cables 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-through EDID  
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-stereo connectors. To  
use these with PC audio, standard male-to-male audio 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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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-ended audio 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-in universal 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-232 or through IP.  
2.4.1 Matrix with RS-232 Control (no IP)  
The AC1120A and AC1122A (without IP feature) actually have 2 separate and  
independent RS-232 control ports.  
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Model AC1120A, AC1121A, AC1122A, AC1123A  
The main RS-232 port 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-232 screw 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 an RS-232 serial connection.  
Figure 6 – IP input versus Auxiliary RS-232  
2.4.1.1 Primary RS-232 Control Port  
This is a 3-terminal captive 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 – Primary RS-232 to PC cable  
2.4.1.2 Auxiliary RS-232 Control 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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Figure 8 – Aux RS-232 port pinout  
2.4.2 Units with IP control  
Models AC1121A and AC1123A are equipped with 10/100 base-T Ethernet  
connection and can be controlled via IP. They also have the primary RS-232 serial  
control port on the screw terminal input. The command set for controlling the  
matrix via the IP port is exactly the same as the RS-232 port. The basic method of  
control is via Telnet. Please see section 3.2.12 IP Control Basics for details.  
3.0 Operation  
The Matrices can be operated using the front panel buttons, by serial commands  
via RS232, or through the IP port.  
3.1 Front-Panel Buttons and Indicators  
An image of the front panel for the 8x8 matrix is shown below. The 16x16 units  
have more INPUT and OUTPUT buttons than shown in this picture.  
Figure 9 –AC1120A front panel controls & indicators  
The front panel can be used for the following purposes:  
Monitor Power On/Off status  
View current routings (ties) either from input or from output  
Make new ties either from input or from output  
Blank or mute a particular or all outputs  
Recall preset patterns  
Save preset patterns  
Disconnect all ties  
Display current sound level as a digital light bar VU meter  
Recall factory presets  
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Model AC1120A, AC1121A, AC1122A, AC1123A  
All of the front panel switches have built-in LEDs that help in the operation. The  
functions of front panel are carefully designed for intuitiveness. With just a little  
practice, one can learn to quickly monitor and control the matrix.  
3.1.1 Viewing Audio and Video Routings or “Ties”  
There are three different ways to view a tie: Video & Audio, Video only, or  
Audio only. The point of view can also be either from input side (where the  
selected input is routed to), or from the output side (see which input is feeding the  
selected output). You can also use the and buttons to quickly go through  
and check status of all channels. Furthermore, during viewing of ties you can  
make new ties.  
3.1.1.1 Viewing ties by Video and Audio  
Press and release both VID and AUD buttons so that the LEDs of the VID and  
AUD buttons are lit, which indicates that you are going to view both together.  
At this point you have to decide if you want to view from the point of view of the  
input or the output side.  
… To View from input side  
Press and release any Input button, the backlit LED of that button will light, and  
all the backlit LEDs for the outputs whose video and audio are both currently tied  
to this input will also light up solid.  
Note  
If there is audio breakaway, the output LED will not be lit. An example may be  
that output #2 video is tied to input #7 while output #2 audio is tied to input 12.  
In this case if you start the viewing from input #7, output #2 will not be lit even  
though input 7 video is routed to it. To see video ties independently from audio  
ties, only the Video or the Audio LED on the front panel should be lit, not both.  
You can now use the and buttons to quickly go through all inputs.  
You can also make new ties by hitting output buttons. New ties will not take  
effect unless ENTER is hit (see next section).  
When you are done viewing ties, to exit you can hit ENTER. If you don’t hit any  
buttons, then after 8 sec the view function times out and all the input and output  
LEDs will go out.  
… To View from output side  
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Press and release any output button, the backlit LED of that button will light, and  
if that output’s video and audio are tied to one particular input, that input LED  
will also light.  
Note: If there is audio breakaway, the input LED will not be lit  
You can now use the and buttons to quickly go through all outputs.  
You can also make new ties by hitting another input button. New ties will not take  
effect unless ENTER is hit (see next section).  
When you are done viewing ties, to exit you can hit ENTER. If you don’t hit any  
buttons, then after 8 sec the view function times out and all the input and output  
LEDs will go out.  
3.1.1.2 Viewing ties by Video only  
Press and release the AUD and/or VID buttons so that the backlit LED of the VID  
button is lit and the AUD button is off  
At this point you have to decide if you want to view from the point of view of the  
input side or the output side.  
… To View from input side  
Press and release any Input button, the backlit LED of that button will light, and  
all the backlit LEDs for the outputs whose video is currently tied to this input will  
also light up solid.  
You can now use the and buttons to quickly go through all inputs.  
You can also make new ties by hitting output buttons. New ties will not take  
effect unless ENTER is hit (see next section).  
When you are done viewing ties, to exit you can hit ENTER. If you don’t hit any  
buttons, then after 8 sec the view function times out and all the input and output  
LEDs will go out.  
… To View from output side  
Press and release any output button, the backlit LED of that button will light, and  
if that output’s video is tied to any input, that input LED will also light.  
You can now use the and buttons to quickly go through all outputs.  
You can also make new ties by hitting another input button. New ties will not take  
effect unless ENTER is hit (see next section).  
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When you are done viewing ties, to exit you can hit ENTER. If you don’t hit any  
buttons, then after 8 sec the view function times out and all the input and output  
LEDs will go out.  
3.1.1.3 Viewing ties by Audio only  
Press and release the AUD and/or VID buttons so that the backlit LED of the  
AUD button is lit and the VID button is off  
At this point you have to decide if you want to view from the point of view of the  
input side or the output side.  
… To View from input side  
Press and release any Input button, the backlit LED of that button will light, and  
all the backlit LEDs for the outputs whose audio is currently tied to this input will  
also light up solid.  
You can now use the and buttons to quickly go through all inputs.  
You can also make new ties by hitting output buttons. New ties will not take  
effect unless ENTER is hit (see next section).  
When you are done viewing ties, to exit you can hit ENTER. If you don’t hit any  
buttons, then after 8 sec the view function times out and all the input and output  
LEDs will go out.  
… To View from output side  
Press and release any output button, the backlit LED of that button will light, and  
if that output’s audio is tied to any input, that input LED will also light.  
You can now use the and buttons to quickly go through all outputs.  
You can also make new ties by hitting another input button. New ties will not take  
effect unless ENTER is hit (see next section).  
When you are done viewing ties, to exit you can hit ENTER. If you don’t hit any  
buttons, then after 8 sec the view function times out and all the input and output  
LEDs will go out.  
3.1.2 Making Audio and Video Routings or “Ties”  
This procedure is an extension of “Viewing Ties” described in above paragraphs.  
3.1.2.1 Making a tie by Input  
Video and Audio to follow each other  
Make sure both VID and AUD LEDs are lit, indicating that your changes will be  
synchronized (audio and video are together). Video and audio will be routed to  
the same input channel.  
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8x8 and 16x16 VGA / HDTV Matrix Switch with Audio, RS232 & IP Control  
Press and release any Input button, the backlit LED of that button will light, and  
all the backlit LEDs for the outputs tied to it will light up solid. At this point,  
pressing any output buttons will be breaking or making connections.  
To disconnect a tie, press the lit output button once. To make new ties, press any  
of the unlit output buttons. The output LED will be blinking to indicate a pending  
change of state. If you change your mind simply press the blinking output LED  
again and it will go back to its previous state.  
When you are done, press ENTER to save new changes. If you wait too long (8  
seconds of inactivity) your changes will be lost and all the input and output LEDs  
will go out.  
Video only or Audio only  
Press and release the AUD and/or VID buttons so that the backlit LED of the  
desired button is lit and the other one is off.  
Follow the same procedure as described above  
3.1.2.2 Making a tie by Output  
Video and Audio to follow each other  
Make sure both VID and AUD LEDs are lit, indicating that your changes will be  
synchronized (i.e. audio and video are from the same input).  
Press and release any Output button, the backlit LED of that button will light,  
and all the backlit LEDs for the input tied to it will light up solid. At this point,  
pressing any output buttons will be breaking or making connections.  
To disconnect a tie, press the lit input button once. To make a new tie, press any  
of the unlit input buttons. The new input LED will be blinking to indicate a  
pending change of state. If you change your mind simply press the blinking input  
LED again and it will go back to its previous state.  
When you are done, press ENTER to execute and save the changed route. If you  
wait too long (8 seconds of inactivity) your changes will be lost and all the input  
and output LEDs will go out.  
Video only or Audio only  
Press and release the AUD and/or VID buttons so that the backlit LED of the  
desired button is lit and the other one is off. Follow the same procedure as  
described above.  
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3.1.3 Recalling Presets (routing patterns)  
The number of presets accessible from front panel is the same as # of inputs  
(however through the IP or Serial port, the unit can store and recall up to 16  
presets even for an 8 input Model)  
Press and release the Preset button. The button will light up solid. Then press and  
release the input button (it will light up) and hit ENTER. You have 8 seconds to  
hit ENTER or the action will be cancelled. This will recall the desired preset tie  
pattern.  
Note that a recalled preset replaces the current tie configuration, which will be  
lost unless it has been stored as another preset.  
3.1.4 Saving Presets (routing patterns)  
The current tie configuration can be saved as a preset to be called up later on.  
To save the current AV routing pattern, press and hold the PRESET button for 3  
sec, the backlit LED will start flashing (this means that save preset function has  
been activated). Press the desired input button to save the preset (the button with  
light up). Then hit the ENTER button to complete the operation. Again, you have  
8 seconds to complete this sequence.  
3.1.5 Disconnecting all AV outputs (blank preset)  
There is a hidden blank preset (think of it as Preset #0) in the system that can be  
very useful in clearing all ties. A blank preset is a preset without any ties selected  
in it. To Recall a blank preset, press and release the Preset button, press and hold  
the ARROW UP () button, and simultaneously press the ARROW DOWN ()  
button. This will clear all ties. From here, the user can make new ties or save the  
blank tie over a preset that had ties in it which effectively erases that preset.  
3.1.6 To reset system to factory defaults  
Disconnect the AC power from the unit. Press and hold the ENTER button on the  
front panel while plugging in AC power. Continue to hold the ENTER button  
until all LEDs on the front panel flash on. System reset clears all ties, presets,  
schedule settings, and unit name.  
3.1.7 Using the Front Panel VU meter  
This function is useful for ensuring no noticeable volume difference among the  
audio sources for models AC1121A and AC1123A.  
Press and hold the AUD button for approximately 3 seconds until the backlit LED  
starts to blink. Press and release an input button whose audio you want to adjust.  
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The associated input LED lights up, the matrix will temporarily route the audio  
input from the selected channel to audio output #1 and monitor its level on the  
front panel. Any other outputs tied to this selected input channel stay connected  
during this adjustment procedure.  
The installer can connect an external VU meter to output #1 or rely on the front  
panel (bottom row of lights) that act as a digital VU meter.  
Notes about VU Meter Function  
The front panel VU meter function is available on both the 16x16 and the 8x8  
units with audio. However, the matrices do not change the volume level. The  
user can do that at the source and use the matrix to monitor the level. The bar  
indicator is for the left input (tip on mini-phono input) channel only. So when  
adjusting a stereo level make sure the left and right audio inputs are balanced  
The bottom row of 8 or 16 LEDs indicate the sound level. Position 10 (or 5 for  
8x8 matrix) is used to correspond to 0 VU (desired peak level).  
Figure 10 –Comparison  
with Analog VU meter on  
16x16 Matrix  
Figure 11 – Graph of VU dB level versus LED bar length  
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3.2 Control Commands (RS-232 and IP)  
The matrices can be controlled via an external control system by using RS-232.  
Additionally, Models AC1121A and AC1123A can be controlled through an IP  
port. Any program capable of standard serial communication in ASCII format is  
capable of working with the matrices. Most PCs with Microsoft Windows  
operating systems have HyperTerminal™ pre installed with this capability. There  
are also many free Terminal Emulator and Telnet software programs available for  
download on the internet.  
Note on RS-232 port availability on your PC  
Most PCs and notebooks do not have a serial port. So to program the  
Matrix Switch you may need a USB to RS-232 Serial converter. These  
are available from Black Box (Model IC199A-R3).  
Figure 12 – USB to RS-232 Adapter  
Use Figure 8 to connect the unit to the PC’s serial port. Use 9600 Baud, 8 bits, No  
Parity, 1 Stop bit, No flow control.  
Upon power up, the matrix will output a screen similar to the figure below  
through its serial port(s).  
Unit's name:  
Version 2.3  
Build # 7  
BBox-I-A-8-8  
Figure 13 – Power on screen  
Note on RS-232 commands  
When the front panel is in use (for example to make new ties or recall presets,  
etc), only status request commands are accepted. Any other command will be  
prompted with the following response:  
Front panel is in use<cr>  
Fortunately, all front panel operations have a timeout function so even if a user  
started to use the panel but forgot to finish the process, it will time out in a few  
seconds and full serial port functionality will be restored.  
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3.2.1 Naming Functions  
The matrix unit can be named. Its name can be up to 10 characters long.  
To assign or retrieve a unit name:  
Command: NU<cr> stands for Name Unit  
Response:  
xxxxxxxxxx (current name)  
Rename unit: ___________  
No change<cr>  
If you hit <cr> or wait 5 seconds (command times out) the unit will respond with:  
Cancelled<cr>  
Otherwise you have 5 seconds to change the name by entering up to 10 ASCII  
characters followed by <cr>. If you just send a <cr> then the stored name will not  
be changed. If you enter more than 10 characters, then the 1st 10 characters will  
be saved as the name and the rest discarded.  
3.2.2 Routing Functions  
Video routing commands are specified from the point of view of the output. The  
wildcard character ‘*’ is acceptable for output (but not input).  
In addition, these commands can be used to monitor or query the status of system  
ties. Omitting the input channel will result in a response of the current routing for  
that output. In entering channel numbers leading zeros are acceptable hence you  
can specify channel 7 as 07 or just 7.  
3.2.2.1 To make a video tie:  
Command: CVn,m<cr> stands for Connect Video n = output, m= input (unit  
accepts leading zeros and spaces are ignored)  
Response: CVn,m<cr>  
If you enter CVn<cr> then you will get the response as above for the n output  
3.2.2.2 To make an audio tie:  
Command: CAn,m<cr> stands for Connect Audio n = output, m= input (unit  
accepts leading zeros and spaces are ignored)  
Response: CAn,m<cr>  
3.2.2.3 To make a synchronized audio/video tie:  
Command: COn,m<cr> stands for Connect Output n = output, m= input (unit  
accepts leading zeros and spaces are ignored)  
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Response:  
CAn,m<cr>  
CVn,m<cr>  
Note: If the system does not have audio, it will still accept this command but  
response will be missing audio tie line.  
3.2.3 Preset Pattern Saving and Routing Functions  
3.2.3.1 To recall a saved preset Video routing pattern:  
Command: PRx<cr> stands for Preset Recall  
x = preset # can be 1 to 16  
Response:  
PRx<cr>  
CVn1,m1<cr>  
CVn2,m2<cr>  
3.2.3.2 To save the current Video routing pattern to a preset:  
Command: PSx<cr> stands for Preset Save  
x = preset # can be 1 to 16 (unit should accept leading zero)  
Response:  
PSx<cr>  
3.2.4 Restoring Factory Defaults  
To restore factory defaults:  
Command: FR<cr> stands for Factory Restore  
Response: Are you sure (Y,N)?<cr>  
Note: You have 5 seconds to press Y, or the command is cancelled.  
Factory defaults restored<cr>  
if the “Y” was entered.  
Cancelled<cr> if other key was entered or command times out.  
Note: Restore Factory command will clear all ties, presets, schedule settings, and  
unit name. All LEDs on the front panel should flash when units executes factory  
defaults command.  
3.2.5 Rebooting the System  
To perform a system reset/reboot (same effect as cycling AC power):  
Command: FB<cr> stands for Firmware Boot  
Response:  
Are you sure (Y,N)?<cr>  
Note: You have 5 seconds to press Y, or the command is cancelled.  
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3.2.6 To Read Audio Volume Units (VU) of output #1  
This command returns the height of hypothetical bar LED indicator having a  
height of 16 segments. It will return a number from 0 to 16 with 10 being 0 db  
level. So if the output #1 is at 0 dB (900 mv p-p sinewave) it returns 10. See  
figure 11 for 16x16 row. This value is 0-16 regardless of the type of matrix.  
Command: RB<cr> stands for Read Bar  
Response: 0 ~ 16<cr>  
3.2.7 To Read Temperature inside the Matrix  
Command: RT<cr> stands for Read Temperature  
Response:  
Temperature in degrees C = 32.500000<cr>  
Temperature in degrees F = 90.500000<cr>  
3.2.8 To Read the Firmware Version  
Command: RI<cr> stands for Read Identity  
Response:  
Unit's name:  
Version 2.3  
Build # 7  
User defined name of the unit  
Firmware Version  
Build number (for mfg purposes only)  
Characteristics of the unit  
BBox-I-A-8-8  
3.2.9 To Read Supply Voltages  
The supply voltages consist of clock battery voltage, 5V supply, and 12V supply.  
Command: RV<cr> stands for Read Voltages  
Response:  
RTC Battery Voltage = 2.9876704  
+5V Supply = 4.9473252  
+12V Supply = 12.4646893  
3.2.10 Real Time Clock Functions  
3.2.10.1 To set date & time:  
Command: DS<cr> stands for Date Set  
Response:  
Friday 04/18/08 12:27:15pm  
Enter the year (00-99):  
Enter the month (01-12):  
Enter the date (01-31):  
Hit Enter if you want to keep previous value; hit Esc to exit  
Enter the day of the week (1=Sun – 7=Sat):  
Enter the hour (1-12):  
Enter the minute (00-59):  
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Enter the second (00-59):  
Enter AM/PM (0-1):  
Notes: You have 16 seconds to make your selection, or the command is cancelled. To skip  
the current prompt without making a change, press ENTER.  
Invalid entry<cr>  
Cancelled <cr> if invalid value was entered.  
Cancelled <cr> if ESC was entered.  
3.2.11 Scheduling Auto recall of Preset Patterns  
The matrix provides up to 4 specific times throughout the day where any preset  
patterns (0 to 16) can be recalled. You can set a schedule that is the same every  
day (daily) or is different for weekdays and weekends. Presets 1 to 16 are those  
saved by the user, and preset 0 disconnects all video and audio outputs  
Notes on Scheduling Presets  
When defining a schedule, to skip the current prompt without making a change,  
press ENTER. Press ESC to exit the schedule setting at any time. Timer values  
should be entered in the proper order meaning that Timer1 should occur prior to  
Timer2, Timer2 should occur prior to Timer3, and etc. Timers will be disabled if  
hour, minute, and AM/PM are set to 0. So if for example, your schedule only has  
to set the pattern once in the morning, leave the data for timers 2 through 4 at  
zero and only enter values for timer 1. If Timer values are not set properly (in  
ascending order), an error message will be prompted  
3.2.11.1 To set a schedule  
Command: SS<cr> stands for Schedule Set (current schedule is displayed)  
Response:  
------------------ Weekday ------------------ (on/off)  
Timer1 = 06:00am Preset Pattern = 1  
Timer2 = 12:05pm Preset Pattern = 3  
Timer3 = 05:30pm Preset Pattern = 7  
Timer4 = 09:00pm Preset Pattern = 12  
(on/off) indicates if  
the Schedule is in-  
effect or not.  
Weekday and  
weekend are both  
on or both off.  
If the 4 timers are  
not in ascending  
order, the unit  
does not let you  
turn the schedule  
on; fix any  
------------------ Weekend ------------------ (on/off).  
Timer1 = 02:00am Preset Pattern = 1  
Timer2 = 06:00am Preset Pattern = 5  
Timer3 = 12:00pm Preset Pattern = 13  
Timer4 = 06:00pm Preset Pattern = 16  
inconsistencies  
before turning on.  
Select Schedule Setting  
00:00am is not a  
valid time setting  
and is used to turn  
off a timer  
1
2
3
= Weekday  
= Weekend  
= Daily  
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4
5
= Schedule On  
= Schedule Off  
ESC = Quit  
Note: You have 16 seconds to make your selection, or the command is cancelled.  
Response: if “1”, “2” or “3” was entered  
Enter weekday Timer1 hour (00-12): Hit Enter if you want to keep previous value  
Enter weekday Timer1 minute (00-59):  
Enter weekday Timer1 AM/PM (0-1):  
Enter weekday Timer1 preset pattern (0-16): Remember Preset 0 disconnects outputs  
.
…… (data for timers 2 & 3, hit Esc if you are done at any time)  
.
Enter weekday Timer4 hour (00-12):  
Enter weekday Timer4 minute (00-59):  
Enter weekday Timer4 AM/PM (0-1):  
Enter weekday Timer4 preset pattern (0-16):  
Response: if “4” was entered (schedule on).  
Schedule setting is ON<cr>  
- - - - - Alternate Response: In case of an inconsistency or error in entry  
Schedule setting cannot be ON because weekday (weekend) TimerX is less than  
or equal to TimerY<cr>  
Response: if “5” was entered (schedule off).  
Schedule setting is OFF<cr>.  
Response: if “ESC” was entered (Quit).  
Quit schedule setting<cr>.  
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3.2.12 IP Control Basics  
Serial  
Control  
RS-232  
Port  
Matrix  
Command  
Processing  
Port 1001  
IP  
Control  
Port 23  
IP Setup  
Figure 14 – Control Block Diagram  
As shown in the figure above, the matrix can be controlled via RS232 Serial port  
or through an IP (Ethernet) port if equipped. If the unit is missing the IP port, then  
in its place, there is an auxiliary 2nd serial control port (see section 2.4.1).  
The IP port of the matrix can be accessed via Telnet (interactive TCP connection).  
Two ports are available, one for controlling the matrix and the other to configure  
the IP parameters.  
Though not recommended, using port 23 you can change the Ethernet interface’s  
IP parameters such as IP address, gateway, port number, etc. The IP settings can  
also be accessed through the unit’s RS232 serial port (recommended).  
Port 1001 by default is used to control the matrix (this port number can be  
changed as part of the IP Settings). The commands used to control the matrix are  
the same as those through the RS-232 Serial port.  
3.2.12.1 IP Setup Commands using the RS-232 Serial Port  
IP interface on the matrix has a unique MAC-address, and it must be assigned a  
valid IP-address to function properly on the network. As shipped from factory this  
IP is 192.168.123.180  
1. To get into the IP setting mode:  
Note: Inactivity period of 16 seconds causes the system to exit this mode. You can also hit  
ESC to end the IP setting mode.  
Command: IP <cr> stands for IP setting mode  
Response:  
Enter IP commands:  
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This is the normal response meaning that IP setting through the RS-232 port is  
allowed  
- - - - - Alternate Response - - - - -  
IP commands not enabled. Please refer to the manual  
This message indicates that IP setting through the RS-232 port is disabled on  
your unit for some reason. Please refer to section 3.2.12.2 below to enable this  
mode  
2. To get the current IP address of the matrix box:  
Command: GIP <cr> stands for Get IP address.  
Response: 192.168.123.180  
3. To set a new IP address:  
Command: SIP192.168.123.179 <cr> stands for Set IP address.  
Response:  
OK ..................................................if command completed successfully.  
Error........................................................................... if command failed.  
4. To get the current gateway IP address:  
Command: GGI <cr> stands for Get Gateway IP address.  
Response: 192.168.123.122  
5. To set a new gateway IP address:  
Command: SGI192.168.123.125 <cr> stands for Set Gateway IP address.  
Response:  
OK ..................................................if command completed successfully.  
Error........................................................................... if command failed.  
6. To get the current subnet mask:  
Command: GNM <cr> stands for Get Net Mask.  
Response: 255.255.255.0  
7. To set a subnet mask:  
Command: SNM255.255.255.0 <cr> stands for Set Net Mask.  
Response:  
OK ..................................................if command completed successfully.  
Error........................................................................... if command failed.  
8. To get the current port number (this is the port to access the matrix):  
Command: GPN <cr> stands for Get Port Number.  
Response: 1001  
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9. To set a port number (IP port that controls the Matrix):  
Command: SPN1000 <cr> stands for Set Port Number.  
Response:  
OK ..................................................if command completed successfully.  
Error........................................................................... if command failed.  
10.To get a device/host name:  
Command: GDN <cr> stands for Get Device Name.  
Response: BB1123-A  
Note on Device Name  
This is the host name assigned to the IP port; it is independent of the  
name assigned to the matrix (NU command), though you can use the  
same name if you wish!  
11.To set a device name:  
Command: SDNnew_name <cr> stands for Set Device Name.  
Response:  
OK ..................................................if command completed successfully.  
Error........................................................................... if command failed.  
12.To reboot the system for the changes to take effect:  
If you change the IP address, Subnet mask, etc., the changes do not take effect  
unless you reboot the unit. You can do this by unplugging the AC from the unit  
and reconnecting it in a few seconds, or by using the FB command discussed  
earlier. However you must first exit the IP setup mode by hitting Esc,  
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3.2.12.2 IP Configuration through port 23  
If you were unable to enter the IP setting mode through the serial command, a  
Telnet TCP programming method can be used to turn on RS-232 serial mode  
programming, or even to configure the network settings directly through port 23.  
To open a Telnet section, a command prompt (Run: CMD) or a HyperTerminal  
window can be used:  
For example, to run a HyperTerminal window, set it up for TCP/IP connection on  
PORT 23 along with the Matrix’s default IP address as the host address.  
Telnet commands and replies have the following format:  
STX  
Command/reply  
CR  
STX character (ASCII code 2 or CTRL-B from the keyboard)  
The unit will respond with <CTRL-B> A for most valid commands.  
1. To use the IP configuration Telnet commands, you must first log in using the  
(L) command.  
Command: <CTRL-B> L <CR> stands for Log in  
2. To enable a serial IP setting (serial programming) mode, type the following  
commands:  
Command: <CTRL-B> SSE2 <CR> Stands for Set Serial Enable  
Command: <CTRL-B> SEC6 <CR> Stands for Serial Enable Char  
Command: <CTRL-B> O <CR> stands for log out  
Reboot the system by cycling power. Now you should be able to configure IP  
parameters through the IP port.  
Alternatively instead of rebooting the system you could use <CTRL-B> <E>  
<CR> to reboot the IP port, this may cause a momentary loss of Telnet  
connection.  
3. To get the current IP address:  
Command: <CTRL-B> GIP <CR>  
Response: <CTRL-B> A 192.168.123.180 <CR>  
4. To set a new IP address:  
Command: <CTRL-B> SIP192.168.123.179 <CR>  
5. To get the current gateway IP address:  
Command: <CTRL-B> GGI <CR>  
Response: <CTRL-B> A 192.168.123.122 <CR>  
6. To set a new gateway IP address:  
Command: <CTRL-B> GGI192.168.123.125 <CR>  
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7. To get the current subnet mask:  
Command: <CTRL-B> GNM <CR>  
Response: <CTRL-B> A 255.255.255.0 <CR>  
8. To set a subnet mask:  
Command: <CTRL-B> SNM255.255.255.0 <CR>  
9. To get a port number:  
Command: <CTRL-B> GPN <CR>  
Response: <CTRL-B> A 1001 <CR>  
10. To set a port number:  
Command: <CTRL-B> SPN1000 <CR>  
11. To get the current device name:  
Command: <CTRL-B> GDN <CR>  
Response: <CTRL-B> A BB1123-A <CR>  
12. To set a new device name:  
Command: <CTRL-B> SDNconcert_hall <CR>  
13. To Reboot device for the new parameters to take effect:  
Command: <CTRL-B> E <CR>  
Response: none! May lose connection  
14. To log out :  
Command: <CTRL-B> O <CR>  
Response: <CTRL-B> <CR>  
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Note on IP Settings through port 23  
If you are unable to access the unit’s  
port 23 from your PC using the  
matrix’s default or last known IP  
address, it could be that the IP  
address of the matrix is not  
compatible on your LAN. One way  
around this is to connect your PC  
directly to the Matrix’s IP port using a  
cross over cable, or use a switch or  
router not connected to anything else  
but your PC and the Matrix, Then  
configure your PC for a static IP  
compatible with the current address  
of the matrix. If the matrix has the  
factory default of 192.168.123.180, a  
PC address of 192.168.123.nnn may  
be entered where nnn is any number  
except 180.  
Note on Accessing the Matrix via the Internet  
It is best to contact your IT or network administrator for assistance. As  
mentioned earlier you can control the matrix through its IP via port  
1001 (default). Most likely the unit will be on a local network connected  
to an Ethernet Switch or Router with a WAN connection. To access the  
matrix from outside your local network, you should configure the  
Ethernet Switch or Router to treat the IP and port assigned to the  
matrix as a virtual server this is a setting of your switch or router. Then  
you can access the matrix from anywhere on the internet via your WAN  
address and assigned port. It is advised to set the matrix’s Gateway  
address the same as your Ethernet switch or router’s Gateway IP  
address. In case of trouble please contact your IP administrator for  
assistance.  
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4.0 Maintenance and Troubleshooting  
4.1 Maintenance  
The front panel CHECK button LED starts flashing if one of the following  
conditions occurs:  
RTC Battery Voltage is below 2.4V  
+5V Supply is outside of normal operating range 4.5V – 5.5V  
+12V Supply is outside of normal operating range 10.8V – 13.2V  
System temperature is exceeding 122° F (50° C)  
If the battery needs changing, please contact Black Box (during the warranty  
period).  
Caution High-Voltage  
Never open the unit’s cover. Lethal voltages exists inside the unit  
Opening the unit also voids your warranty.  
If there is a problem with the 12 or 5v supplies, you need to return the unit for  
repair. Please see next section. If the temperature is excessive in the unit, you  
must make sure that there is adequate air flow around the unit.  
4.2 Troubleshooting  
Make sure that all your connections are solid, and check the state of the LED’s on  
the front of the unit. Do not open or try to repair the unit yourself. There is no  
customer repairable item in the unit and you will void your warranty.  
4.2.1 Calling Black Box  
If you determine that your unit is malfunctioning, do not attempt to repair the unit.  
Contact Black Box Tech. Support at 724-746-5500.  
Before you do, make a record of the history of the problem. We will be able to  
provide more efficient and accurate assistance if you have a complete description,  
including:  
• The nature and duration of the problem;  
• The components involved in the problem  
• The results of any testing you’ve already done.  
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4.2.2 Shipping and Packaging  
If you need to transport or ship your matrix:  
• Package it carefully. We recommend that you use the original container.  
• Before you ship the unit back to Black Box for repair or return, contact us to  
get a Return Authorization (RA) number.  
5.0 Specifications  
Video Inputs  
8 or 16 HD15 female connectors  
8 or 16 HD15 female connectors  
Video Outputs  
Resolutions Supported PC resolutions up to 1900x1200 @ 60 Hz & HDTV to  
1080p  
Video Levels  
-0.3v to 0.7v (1 V p-p) on RGB, 0 to 5v DC on Sync  
Unbalanced Stereo.  
Audio Inputs  
Audio Input Levels  
Audio outputs  
Audio Bandwidth  
0 to +4dBu (0.78 to 1.23Vrms) line level  
Balanced Stereo on screw terminals.  
10 Hz to > 10 MHz (could pass through analog or  
digital S/PDIF audio sources)  
Temperature  
Operating: 32 to 122°F (0 to 50°C);  
Storage: –40 to +185°F (–40 to +85°C)  
Enclosure  
Battery Type  
MTBF  
Steel with Aluminum front panel  
CR2032 (3v Lithium)  
90,000 hours (calculated estimate)  
100VAC-240VAC 50/60Hz.  
3.5" High x 19" Wide 12.78” Deep  
9.4 pounds  
Power  
Size  
Weight  
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Appendix 1 – Front Panel Quick Reference Guide  
Figure 15 – Control buttons on the front panel  
Function  
Procedure  
View ties or Make ties Hit VID and/or AUD buttons to light desired  
Hit any of the INPUT or OUTPUT Buttons  
To change ties, hit any INPUT or OUTPUT then  
hit ENTR  
Use and buttons to quickly scroll  
Hit PRE (button lights up)  
Hit any of the 16 INPUT buttons  
Hit ENTR  
Recall Presets  
Save Presets  
Hold PRE until it starts blinking  
Hit any of the 16 INPUT buttons  
Hit ENTR  
Disconnect all outputs Hit PRE (button lights up)  
Hold ▲  
While holding the , hit button  
Reset to Factory Defaults Disconnect power  
Hold ENTR  
While holding ENTR, plug power  
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Appendix 2 – Command Summary  
Command  
Function  
COn,m  
Connect Output (both A&V). n = output, m= input  
Omitting ,m will show current connections  
Substitute * for n to tie all outputs  
CVn,m  
CAn,m  
Connect Video output. n = output, m= input  
Omitting ,m will show current connection  
Substitute * for n to tie all outputs  
Connect Audio output. n = output, m= input  
Omitting ,m will show current connection  
Substitute * for n to tie all outputs  
PRx  
PSx  
NU  
FR  
FB  
RT  
RI  
Preset Recall... x = preset # can be 1 to 16  
Preset Save ... x = preset # can be 1 to 16  
Name Unit  
Factory Restore (back to default settings)  
Firmware Boot (Resets the entire system)  
Read Temperature  
Read Identity (firmware version, & characteristics)  
Read Voltage levels (battery, power supply)  
Read Bar (reads VU level of output #1 Left Chan)  
Date and Time Set  
RV  
RB  
DS  
SS  
IP  
Schedule Set  
Access or change IP settings of Matrix  
GIP (get IP)  
SIP  
SGI  
(set IP)  
GGI (get Gateway)  
(set Gateway)  
(set Net Mask)  
(get Port No.)  
(set Dev Name)  
GNM (get Net Mask) SNM  
GPN (get Port No.) SPN  
GDN (get Dev Name) SPN  
31  
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Model AC1120A, AC1121A, AC1122A, AC1123A  
32  
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Download from Www.Somanuals.com. All Manuals Search And Download.  
© Copyright 2008. Black Box Corporation. All rights reserved.  
1000 Park Drive  
Lawrence, PA 15055-1018  
724-746-5500  
Fax 724-746-0746  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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