Black Box Computer Hardware AC300A RX User Manual

AUGUST 2003  
AC300A-TX  
AC300A-RX  
Universal Video and Stereo Audio  
Fiber Optic Transmission System  
P/N122669  
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  
CUSTOMER  
SUPPORT  
INFORMATION  
 
AC300A-TX/AC300A-RX  
NOM STATEMENT  
Normas Oficiales Mexicanas (NOM)  
Electrical Safety Statement  
INSTRUCCIONES DE SEGURIDAD  
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de  
que el aparato eléctrico sea operado.  
2. Las instrucciones de seguridad y operación deberán ser guardadas para  
referencia futura.  
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de  
operación deben ser respetadas.  
4. Todas las instrucciones de operación y uso deben ser seguidas.  
5.El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la  
tina de baño, lavabo, sótano mojado o cerca de una alberca, etc.  
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que  
sean recomendados por el fabricante.  
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea  
recomendado por el fabricante.  
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá  
a lo descrito en las instrucciones de operación. Todo otro servicio deberá ser  
referido a personal de servicio calificado.  
9. El aparato eléctrico debe ser situado de tal manera que su posición no  
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,  
alfombra o superficie similar puede bloquea la ventilación, no se debe colocar  
en libreros o gabinetes que impidan el flujo de aire por los orificios de  
ventilación.  
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor  
como radiadores, registros de calor, estufas u otros aparatos (incluyendo  
amplificadores) que producen calor.  
2
 
AC300A-TX/AC300A-RX  
NOM STATEMENT  
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo  
descrito en el instructivo de operación, o como se indique en el aparato.  
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización  
del equipo no sea eliminada.  
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean  
pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo  
particular atención a los contactos y receptáculos donde salen del aparato.  
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las  
recomendaciones del fabricante.  
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas  
de energia.  
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea  
usado por un largo periodo de tiempo.  
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean  
derramados sobre la cubierta u orificios de ventilación.  
18. Servicio por personal calificado deberá ser provisto cuando:  
A: El cable de poder o el contacto ha sido dañado; u  
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o  
C: El aparato ha sido expuesto a la lluvia; o  
D: El aparato parece no operar normalmente o muestra un cambio en su  
desempeño; o  
E: El aparato ha sido tirado o su cubierta ha sido dañada.  
CE INFORMATION  
Standards to which conformity is declared: EN 55103-1:1997 EN 55103-2:1997  
3
 
AC300A-TX/AC300A-RX  
ITEMS INCLUDED  
Included with this product, you should have received:  
1) 1 - AC300ATransmitter or Receiver unit  
2) 1 - Universal inputAC power supply  
3) 1 - North American line cord  
4) 1 - 2 x BNC to 4-pin Mini-DIN cable for S-Video  
5) 1 - BNC to BNC cable for composite video (if using this system to transmit  
composite video, connect this cable to the “Y” input or output on the TX or  
RX unit.)  
6) 1 - 3 x BNC to 3 x RCA cable for component video  
7) 1 - BNC-F to RCA-M adapter for composite video  
8) 1 - 2 x RCA-M to wire ends for audio  
4
 
AC300A-TX/AC300A-RX  
GENERAL INFORMATION  
Introduction:  
The Universal Video and Stereo Audio Fiber Optic Transmission System (AC300A -  
V/A System) is a configurable, adjustment-free transmitter/receiver pair that employs  
all digital processing and transmission techniques. It is a uni-directional system that  
supports five different video formats (composite, S-Video, component, progressive  
scan DVD and 480p HDTV) with up to two channel of audio.  
The use of digital encoding assures high-quality noise-free transmissions that retain all  
of their initial parameters regardless of fiber optic cable attenuation. Indicator LEDs  
provided on each unit continuously signify the presence of video and audio signals.  
Specifications:  
Audio:  
Bandwidth .................................... 20 Hz to 20 kHz (-3dB)  
Input/Output Impedance .............. 600 Ohms or 24k Ohms, balanced or unbalanced  
Input/Output Voltage.................... 0dBm nominal +10dBm max.  
THD............................................. 0.1% typical  
Signal to Noise Ratio ................... 85dB  
Signal Connectors ........................ Removable terminal block  
Video:  
Bandwidth ........................................... Y: 14 MHz; R-Y and B-Y: 7 MHz (-3dB)  
Input/output Impedance ...................... 75 Ohms  
Input/outputVoltage ............................ 1 V p-p nom., 1.1 Vp-p max.  
Differential Phase ............................... 0.5° typical  
Differential Gain ................................. 1.0% typical  
Signal to Noise Ratio........................... 62 dB CCIR weighted  
Signal Connectors ............................... BNCs (3)  
Optical:  
Operating Wavelength ........................ 1310nm MM/SM  
Optical Fiber ....................................... 62.5/125microns MM or  
8-10/125 microns SM  
Optical Connectors ............................. ST  
5
 
AC300A-TX/AC300A-RX  
GENERAL INFORMATION  
Wavelength  
1310 MM  
1310 SM  
Loss Budget (in dB)  
Distance* (in km)  
0-25  
0-25  
0-2  
0-60  
*Note: Distance specifications are only approximate and are not guaranteed.  
Operating loss budget must not be exceeded.  
Misc:  
Operating Temperature Range ........... -35 to +75 degrees C  
Operating Power ................................ 9 to 24 Volts AC or DC @ 5 watts (max)  
CAUTION! The transmitting element in some versions of theAC300A-V/ATrans-  
mitter is a solid-state Laser Diode located in the optical connector on the unit.  
This device emits invisible infrared electromagnetic radiation which can be harm-  
ful to human eyes. The radiation from this optical connector, if viewed at close  
range without a fiber optic cable connected to the optical connector, may be of  
sufficient intensity to cause instantaneous damage to the retina of the eye. Direct  
viewing of this radiation should be avoided at all times.  
INSTALLATION  
Installation Procedure:  
The AC300A-V/ASystem is normally preset for immediate use with audio input cir-  
cuitry set for balanced 600 Ohm input impedance and output set for balanced audio. If  
a different protocol is desired, it can be easily selected using the dip switches located  
on the back panel of the unit. (See table on next page.) There are indicator LEDs on  
the units for monitoring purposes and various user selectable options for the various  
signals accommodated. The following instructions describe the typical installation pro-  
cedure and the function of the LED indicators.  
1. The various options, as already mentioned, have been preset. If unbalanced  
high-input impedance or unbalanced output is desired, please refer to instruc-  
tions on the following page.  
6
 
AC300A-TX/AC300A-RX  
INSTALLATION  
2. Connect the fiber optic cable or cables between the two AC300A-V/A units.  
See page 4 for a list of cables provided and the types of signals they support.  
3. Apply power to bothAC300A-V/A units  
4. When power is applied, the green POWER LED will light, indicating the pres-  
ence of operating power. The green VIDEO LED(s) and AUDIO LED(s) will  
give an indication stated on page 10.  
5. Connect the audio input signals to the proper positions on the removable terminal  
blocks. Be certain to check all connections and assure that inputs and outputs  
are not intermixed. Refer to the next section for the various connections.  
6. The system should now be operational.  
System Switch Settings:  
The audio interface circuit used in this product has external switches that are used  
to configure the various signal options. If you wish to make changes to the factory  
default settings, please refer to the charts below:  
Audio Input (Transmitter Unit)  
Audio Input  
Channel  
Switch  
Position  
On  
600 Ohm input impedance 24k Ohm input impedance  
unbalanced input balanced input  
600 Ohm input impedance 24k Ohm input impedance  
unbalanced input balanced input  
Off  
1
1
2
3
4
2
7
 
AC300A-TX/AC300A-RX  
INSTALLATION  
Audio Output (Receiver Unit)  
Audio Output Switch  
Channel  
Position  
On  
Off  
1
2
1
2
unbalanced output  
unbalanced output  
balanced output  
balanced output  
Notes: On the receiver unit in the AC300A-V/A system, switches 3 and 4 are  
not used and should be left in the off position.  
8
 
AC300A-TX/AC300A-RX  
INSTALLATION  
System Connections:  
The various input and output connections for the AC300A-V/A system are as  
follows:  
Video Input or Output:  
BNC (3) Connectors  
Audio Connector - Transmitter Unit:  
Balanced  
Unbalanced  
Position 1-  
Position 1+  
Position G  
Position 2-  
Position 2+  
Channel 1 Input (-)  
Channel 1 Input (+)  
Ground  
Channel 2 Input (-)  
Channel 2 Input (+)  
Channel 1 Ground  
Channel 1 Signal  
Channel 2 Ground  
Channel 2 Signal  
Audio Connector - Receiver Unit:  
Balanced  
Unbalanced  
Position 1-  
Position 1+  
Position G  
Position 2-  
Position 2+  
Channel 1 Output (-)  
Channel 1 Output (+)  
Ground  
Channel 2 Output (-)  
Channel 2 Output (+)  
Channel 1 Ground  
Channel 1 Signal  
Channel 2 Ground  
Channel 2 Signal  
9
 
AC300A-TX/AC300A-RX  
INSTALLATION  
Indicator LEDs and Alarm Circuitry:  
The AC300A-V/A system has integral indicator LEDs that are used to monitor the state  
of the units. Transmitter and receiver units each feature one Video LED, oneAudio LED  
and one Power LED. Following is an explanation of each LED’s indicator conditions.  
TRANSMITTER and RECEIVER:  
Power: (Green) Indicates that correct power has been applied.  
TRANSMITTER:  
Video: OFF: Indicates no video detected on the Y-Video BNC connector  
ON: Indicates video detected on input Y-Video BNC connector  
Audio: OFF: No audio detected on input audio connector  
BLINKING: Audio detected on input audio connector  
RECEIVER:  
Video: OFF: Indicates no video detected over fiber and, as a result, no  
video present on output Video BNCs.  
ON: Indicates video detected over fiber and, as a result, video present  
on output Video BNCs.  
Audio: OFF: Indicates no audio detected over fiber and, as a result, no active  
audio detected at the receiver unit.  
BLINKING: Indicates audio detected over fiber and, as a result,  
active audio detected at the receiver unit.  
10  
 
AC300A-TX/AC300A-RX  
OPERATING POINTERS AND TROUBLESHOOTING  
Optical Fiber:  
The AC300A-V/Aoperates with most multimode (MM) and single-mode (SM) opti-  
cal fibers. Be certain that the correct size fiber is being used for the particular trans-  
mitter/receiver combination.  
Also be certain that the attenuation and bandwidth of the fiber optic cable being used  
is within the range of the system’s loss budget specifications.  
Troubleshooting:  
Multimode fiber optic cable contains an optical fiber with a light carrying “core” that is  
only .0025 inches (62.5 microns) in diameter. Single-mode fiber optic cable has an  
even smaller “core”, only 00032 to .0004 inches (8-10 microns). This is smaller than a  
human hair!As a result, any minute particles of dirt or dust can easily block the fiber  
from accepting or radiating light. Therefore, the key word is cleanliness. Always use  
the dust caps provided with all optical connectors whenever they are exposed to air.  
Also, it is a good idea to gently clean the tip of an optical connector with a lint-free  
cloth moistened with alcohol whenever dust is suspected.  
The status of any of the indicator LEDs should provide the first clue as to the origin of  
any operation failure. Be certain that the input and output signal connections are  
proper. Due to the number of positions, it is possible that there may be wrong connec-  
tions.  
Finally, although multimode and single mode devices may look the same, they will not  
operate properly together. Using the wrong device or fiber can easily add more attenu-  
ation than specified, resulting in poor overall performance.  
If, after reviewing the above possibilities, the system is still not operating, please con-  
tact the Black Box Customer Service for further assistance  
11  
 
AC300A-TX/AC300A-RX  
MAINTENANCE  
The only maintenance that can be provided by the user is to ascertain that optical  
connectors are free of dust or dirt that could interfere with light transmission and that  
electrical connections are secure and accurate.  
All other questions or comments should be directed to Black Box Customer Service. It  
should be noted that many “problems” can easily be solved by a simple telephone call.  
12  
 
© Copyright 2003. Black Box Corporation. All rights reserved.  
1000 Park Drive Lawrence, PA 15055-1018 724-746-5500 Fax: 724-746-0746  
 

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