VideoEase Discreet Balun Application Guide

VideoEase Discreet Audio-Video Balun Application Guide
VideoEase Discreet Audio-Video
Baluns
500019
500020
500021
Application Guide
Version 1.03
Jan 2006
© MuxLab Inc. 2003-2006
1
VideoEase Discreet Audio-Video Balun Application Guide
Purpose
The purpose of this document is to explain how to apply MuxLab’s Discreet Audio-Video
Baluns in different operating scenarios and to discuss issues not covered in the Installation Guide
that comes with the products.
Function of the Discreet Audio-Video Baluns
The function of the Discreet Audio-Video Baluns is to provide a cost-effective method to
connect consumer audio-video equipment via Cat5 twisted pair cable in a point-to-point
connection. The size of the product and the screw terminal connections allow the baluns to be
installed in various combinations thereby maximizing the use of the Cat5 cable.
Equipment Supported
Used in pairs, the Discreet Audio-Video equipment work with any audio-video equipment that
supports analog audio, analog video and digital audio formats. The list includes equipment such
as the following:
DVD players
VCR
Monitors
Projectors
Plasma screens
Home theatre systems
Laptops
PCs
Gamestations
Splitters
Distribution amplifiers
Scan converters
Video scalers
Matrix switchers
1xN switchers
MPEG decoders
Video servers
Cameras
CCTV equipment
Component Video Balun (500021) - Performance Limit
Due to the bandwidth limitation of the Component Video Balun, the product supports only
medium resolution (480i and 480p). It does not support high definition video (HDTV) which is
720p and 1080i. Therefore when used with HiDef sources such as satboxes, or HiDef DVD, it
is recommended to select 480 resolution. The same applies to the RGB Balun (5000002).
Specifically, in one situation it was been found that ghosting occurred when an older model
NEC42VP4 plasma screen was upgraded to a newer Panasonic TH50PHD7. The balun
bandwidth, coupled with a higher receiver bandwidth of the plasma may have combined to
create an impedance mismatch, thereby causing ghosting to appear on the screen. One way to
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
reduce the ghosting may be to turn off the progressive scan (p) of the component video source
thereby reducing the signal bandwidth.
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Typical Applications
The Discreet Audio-Video Baluns may be used to establish a variety of point-to-point
connections via Cat5 twisted pair. The following diagrams illustrate some basic applications.
Cat 5 twisted pair cable
Audio Amplifier
DVD or VCR
Analog Audio Source
Analog Audio Baluns (500019)
One pair required for mono
Two pairs required for stereo
Analog Audio Amplifier and
Speaker System
Figure 1; Analog Stereo Audio
Y
Pb
Pr
DVD or VCR
Y
Pb
Pr
4-pair Cat5 twisted pair cable
Component Video Source
Component Video Baluns (500021)
Six (6) required per YPbPr connection
Component Video Monitor
Figure 2; Component Video (YPbPr)
DVD or VCR
4-pair Cat5 twisted pair cable
Composite Video Source
Component Video Baluns (500021)
Composite Video Monitor
Figure 3; Composite Video (NTSC, PAL, SECAM)
Digital Audio Balun (500021)
DVD or VCR
Digital Audio
Decoder/Amplifier
DA Decoder/Amp
1-pair twisted pair
Digital Audio Source
Figure 4; Digital Audio (ie; Dolby™ Digital)
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Combining Baluns for Maximum Cat 5 Cable Utilization
The Discreet Audio-Video Baluns may be combined on the back of audio-video equipment in a
variety of combinations, thereby allowing for maximum utilization of the Cat 5 cable. The
following diagrams illustrate how a single four-pair Cat5 cable may be optimized in different
application scenarios.
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Figure 5: Component Video Only
Component Video
Y
Pb
Pr
Figure 6: Component Video and Digital Audio
Analog Audio
S-Video
Composite
Video
L
Digital Audio
R
S/PDIF
Component Video
Composite
Y Pb
Pr
S-Video
Video
Component Video
Baluns (500021)
Component Video
Baluns (500021)
One (1) Twisted Pair
Pb
Pr
Analog Audio
S-Video
Digital Audio
Balun (500020)
4-pair Cat 5
Twisted Pair Cable
Figure 7: Composite Video and Digital Audio
Y
Digital Audio
S/PDIF
One (1) Twisted Pair
4-pair Cat 5
Twisted Pair Cable
Component Video
Analog Audio
L
R
Composite
Video
L
Component Video
Balun (500021)
Digital Audio
R
Figure 8: Composite Video and Analog Audio
Component Video
S/PDIF
Y
Pb
Digital Audio
Balun (500020)
Pr
Composite
Video
S-Video
Analog Audio
L
Digital Audio
R
S/PDIF
Component Video
Balun (500021)
Analog Audio
Baluns (500019)
One (1) Twisted Pair
One (1) Twisted Pair
4-pair Cat 5
Twisted Pair Cable
4-pair Cat 5
Twisted Pair Cable
Figure 9: S-Video and Analog Audio
Figure 10: S-Video and Digital Audio
Audio-Video Equipment Interface
Audio-Video Equipment Interface
Component Video
Component Video
Composite
Y
Pb
Pr
S-Video
Video
Analog Audio
L
R
S-Video to Dual
RCA Adaptor
(3rd party)
Digital Audio
S/PDIF
Analog Audio
Baluns (500019)
Component Video
Baluns (500021)
One (1) Twisted Pair
Y
Pb
Pr
S-Video to Dual
RCA Adaptor
(3rd party)
Analog Audio
S-Video
Composite
Video
L
Digital Audio
R
S/PDIF
Digital Audio
Balun (500020)
Component Video
Baluns (500021)
One (1) Twisted Pair
4-pair Cat 5
Twisted Pair Cable
4-pair Cat 5
Twisted Pair Cable
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Using Spare Twisted Pairs from a LAN Connection
In some installations where a point-to-point audio-video connection is needed and it is not
practical to add twisted pair cable, there is the possibility of using spare twisted pair cable that is
behind the wall. For example if an Ethernet 10/100 LAN is installed and there is a LAN outlet
connecting two rooms between a PC and a LAN hub, it may be possibly to use the unused
twisted pairs from this connection. Ethernet 10/100 requires two (2) twisted pairs. These
twisted pairs must be terminated on pins 1&2, 3&6 of the RJ45 jack. Assuming a four-pair
Cat 5 cable was installed between the PC and the hub, there may be two unused twisted pairs
available behind the wall if they have not already been used for other services.
Assuming the spare pairs are available and the expertise to modify the wiring is available, the
two spare twisted pairs could be diverted to a second and/or third RJ45 outlet at both ends.
This would allow up to two audio-video channels to be transmitted via Cat5 between the two
locations. The following diagram shows how the two spare twisted pairs could be used to
transmit stereo-audio or composite video and monaural audio from one room to another.
In regard to crosstalk, there will be no interference between the audio-video signal and the
LAN signal under the same Cat5 cable jacket.
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Wallplates With Multimedia Feed-Thru Modules
The Discreet Audio Video Baluns work in conjunction with wallplates with third party
multimedia feed-thru modules. The Discreet Baluns offer the advantage of greater distance
performance versus standard Cat5 multimedia modules thus providing increased cabling
flexibility and range. The following photos illustrate some typical multimedia modules available
on the market.
In this application, the Discreet Baluns are connected to the back of the feed-thru module. A
standard RCA coax jumper cable is used to connect the equipment to the front of the wallplate.
Since the Discreet Balun adds depth, one of the issues to consider is the amount of clearance
that is available behind the module. The following diagram illustrates a typical connection with
approximate dimensions for balun depth and height.
RCA Female-Female
Feed-Thru Module
2.5" (6.35 cm)
One (1) Twisted Pair
0.5625" (1.429cm)
Discreet Balun
Depth - Fully Inserted
2.0625" (5.24 cm)
The following are some of the companies offering multimedia feed-thru modules.
Company
Leviton
Hubbell
Ortronics
Panduit
ICC
Unicom
Signamax/AESP
Siemon
Website
http://www.levitonvoicedata.com/
http://www.hubbell.com/
http://www.ortronics.com/
http://www.panduitncg.com/
http://www.icc.com
http://www.unicomlink.com/#
http://www.signamax.com/
http://www.homecabling.com/
Product
QuickPort Audio/Video Cable Connectors
Modular Inserts
Multimedia feed-thru modules
The tradenames mentioned in this table are registered trademarks of their respective companies.
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Balun Spacing Requirements
The Discreet Baluns are designed to mount side by side on the rear of any audio-video
equipment. The height and width dimensions are .594” x 625” (1.51 x 1.59 cm). Therefore
the minimum center-to-center spacing of the RCA is approximately .95” to 1.0” ( 2.41 to 2.54
cm). The following diagram illustrates the layout when a matrice of Discreet Baluns are
mounted adjacent to each other.
.625"
1.59 cm
.594"
1.51 cm
Balun Access on Matrix Panels
In the professional audio-video environment, the BNC connector is more typically found than
the RCA connector. In some applications a matrix of CCTV Screw Terminal Baluns (500009)
must be mounted onto a matrix of BNC connectors. If the baluns must be removed
periodically, access to the BNC connector in the center of the matrix may be difficult. To
overcome the problem, the Component Video Balun (500021) may be used in conjunction with
a RCA-F to BNC-M adapter, thereby allowing a video balun in the matrix center to be
removed and reconnected with ease. The following diagram illustrates.
MuxLab Discreet Balun
RCA-F to BNC-M adapter
BNC-F
© MuxLab Inc. 2003-2006
9
VideoEase Discreet Audio-Video Balun Application Guide
Compatibility With Other MuxLab Baluns
The Discreet Baluns are compatible with other MuxLab VideoEase baluns as shown in the
following table. Although designed for the component video environment, the Component
Video Balun (500021) supports composite video and S-Video. When used for S-Video and
S-Video adapter that converts the standard 4-pin mini-DIN to two RCA connectors is needed
as shown in figures 5 & 6.
Model
500000
500019
500001
•
500020
•
•
•
500002
500007
500009
500010
500011
500012
•
•
•
•
500015
500016
500017
500025
500026
•
•
•
•
500032
500033
•
500050
500060
500061
500200
© MuxLab Inc. 2003-2006
500021
•
•
•
•
•
•
•
10
VideoEase Discreet Audio-Video Balun Application Guide
Analog Audio Balun (500019) in a Single-Ended
Configuration
The Analog Audio Balun (500019) may be used in a single-ended application where one end is
an 75-ohm unbalanced audio interface and the other is a balanced audio interface. For example
the Analog Audio Baluns are connected to an unbalanced audio source such as a DVD or
VCR.
If the receiver, such as an audio matrix switcher has balanced audio inputs, the twisted pair from
the source can be connected directly to the receiver input.
Line Audio Boosters
In some applications, it may be necessary to boost the line audio signal due to a weak output
signal. A line audio boost such as the one found in the following photo may be helpful and may
be used in conjunction with the 500019 as well as other MuxLab audio-video baluns.
http://www.audiooutfitter.com/store/AB-1PA.html.
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Line Audio Splitters
In order to split a single stereo audio source to two receivers, it is recommended to use an
active audio distribution amplifier such as the one shown in the following link.
http://www.kramerelectronics.com/indexes/pic.asp?p=PT-102A
Compatibility with Crestron™ QM-RMCRX-BA
The Analog Audio Balun has been tested by Creston to work with its Room Media controller
and QuickMedia™ Receiver (Model QM-RMCRX-BA) in a single-ended balanced audio
environment. The QM-RMCRX features balance audio output and when used with the
500019 on the receive end, results are positive. The following is a link to the Crestron QMRMCRX datasheet.
http://www.crestron.com/downloads/pdf/spec_sheets/commercial_and_residential/qm-rmcrx-ba.pdf
For more information, please contact Crestron Technical Support.
© MuxLab Inc. 2003-2006
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VideoEase Discreet Audio-Video Balun Application Guide
Conclusion
Should you require additional information, please contact MuxLab Customer Technical Support
for assistance or visit MuxLab’s website at www.muxlab.com.
MuxLab Inc.
8114 Trans Canada Hwy,
St. Laurent (Quebec)
Canada H4S 1M5
© MuxLab Inc. 2003-2006
Telephone : ....................................514-905-0588
Toll-free (North America) : ......... 1-877-689-5228
Fax : ..............................................514-905-0589
E-mail:
videoease@muxlab.com
URL:
www.muxlab.com
13
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