Hall Research Technologies UVA-4 Bedienungsanleitung
User’s Manual
UVA-4 & UVA-8
4 or 8 Channel Splitter
PC Video and Audio over Twisted-Pair
UMA1189 Rev. NC
Order toll-free in the U.S. 800-959-6439
FREE technical support, Call 714-641-6607 or fax 714-641-6698
Address: Hall Research, 1163 Warner Ave. Tustin, CA 92780
Web site: www.hallresearch.com E-mail: info@hallresearch.com
CUSTOMER
SUPPORT
INFORMATION
UVA-4
UVA-8
4 or 8 Channel Splitter PC Video & Audio over Twisted-Pair Receivers
1
TRADEMARKS USED IN THIS MANUAL
Hall Research and its logo are trademarks of Hall Research.
Any other trademarks mentioned in this manual are acknowledged as
the property of the trademark owners.
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment generates, uses, and can radiate radio frequency
energy and if not installed and used in strict accordance with the
manufacturer’s instructions, may cause interference to radio
communication. This equipment is 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, which are intended to provide
reasonable protection against such interference when the equipment
is operated in a commercial environment. Operation of this
equipment in a residential area is likely to cause interference, in
which case the user at their 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.
Model UVA-4 and UVA-8
2
Contents
1. Introduction .....................................................................3
1.1 General .........................................................................3
1.2 Features ........................................................................3
2. Installation.......................................................................3
2.1 Package Contents............................................................3
2.2 Connection to Compatible Receivers ....................................4
2.3 Cable Requirements .........................................................4
2.4 Typical Block Diagram for UVA-4 or UVA-8 ............................4
3. Configuration & Operation..................................................5
3.1 Why Cable Compensation? ................................................5
3.2 Compensation Adjustment Procedure on URA Receivers ..........6
3.3 Advanced Brightness Adjustment on URA Receivers................7
3.4 Why Skew Adjustment?.....................................................8
3.5 Skew Adjustment for URA-SKU and URA-XT Receivers............9
3.6 Signal Adjustment for the Daisy Chain ..................................9
4. Troubleshooting .............................................................10
4.1 Contacting Hall Research.................................................10
4.2 Shipping and Packaging ..................................................10
4.3 Problem Solving FAQ......................................................11
5. Specifications.................................................................12
4 or 8 Channel Splitter PC Video & Audio over Twisted-Pair Receivers
3
1. Introduction
1.1 General
This User Manual applies to model number UVA-4 and UVA-8 series of high
resolution PC or HDTV component audio and video systems.
These devices are four (4) or eight (8) Channel Splitters for PC Video & audio over
Twisted-Pair senders
In a typical application, they are located at the video & audio source and connected
to one or more compatible receiver units.
Low-skew UTP cable (such as Hall Research’s Zero-skew™ CAT5 cable) is
recommended for the URA particularly if cable lengths are 200 feet or longer.
1.2 Features
•4 channel (UVA-4) or 8 channel (UVA-8) splitter versions
•Support for local monitor and audio at transmitter
•Transmits video and audio on a single CATx cable
•Supports resolutions up to 1920x1440 at any refresh rate
•Compact & rugged metal enclosure
•Eliminates the need for bulky, expensive and hard to build multi-coaxial
cables for High-Resolution A/V extension
•Amplifies the signal for clean and crisp transmission
•Differential signaling eliminates ground loops and noise
•Rugged, Reliable, Compact size
•Drive standard Cat5 cables to 1,000 feet depending on resolution
2. Installation
2.1 Package Contents
Your package should contain the following items:
(1) UVA – 4 or UVA-8
(1) Universal power supply (6 VDC @ 1.5A) with IEC320 Power Cord
(1) 6 ft HD15-M-M VGA cable
(1) 6 ft 3.5mm – MM Audio cable
(1) User manual.
Model UVA-4 and UVA-8
4
2.2 Connection to Compatible Receivers
The UVA-4 and UVA-8 units have single UTP cable connections to any of Hall
Research’s compatible URA receiver product line.
Some compatible receivers are:
PART NUMBER
URA
URA-SKU
URA-XT
URA-232
URA-232-XT
RS232 is Not Functional
Table 2 – Compatible Receivers
Connect the UTP cable from each compatible URA receiver to the “UTP
OUT” connectors of the UVA-4 or UVA-8.
Connect the HD15 - “PC/HDTV IN” connector on the splitter to the video
source. For YPbPr video sources, use a 3-RCA to HD15 cable (Hall
Research P/N CHD15-RGB).
Connect the 3.5mm - “AUDIO IN” connector to the audio source or other
sound equipment.
Connect the included power supply to the 2.5mm – center positive +6 VDC
power input connector on the unit.
Never use any other supply as this may damage the device.
2.3 Cable Requirements
All units can use CAT5/5e/6 or Zero-Skew™ UTP or STP (unshielded or shielded
twisted pair) cables.
2.4 Typical Block Diagram for UVA-4 or UVA-8
Figure 2 – UVA-4 & UVA-8 Application Diagram
4 or 8 Channel Splitter PC Video & Audio over Twisted-Pair Receivers
5
3. Configuration & Operation
3.1 Why Cable Compensation?
All cables attenuate (reduce) the high-frequency components of the video signal that
is being transmitted. The longer the cable, the more signal loss. If not compensated
for, this signal loss will result in blurry and smeared images being displayed.
The image quality depends on the resolution and level of detail in the image. The
Hall Research URA series of receivers have one of the most precise and complex
equalization techniques in the industry and allow full recovery of the original signal’s
bandwidth.
It is best to make this adjustment using a test pattern that is designed to depict and
exaggerate this effect.
Some Hall Research senders may have a built-in test pattern generator. If your
sender unit is equipped with this feature, simply activate it on the sender. Otherwise,
you can connect a PC to the source and display a test pattern. A sample test pattern
is available at http://www.hallresearch.com/skew.htm to assist in the adjustment of
the compensation and to evaluate the amount of color skew in the installation.
The table below lists the recommended maximum distances from sender to the
receiver depending on the resolution used.
Refresh Rate
60 Hz 75 Hz
800x600 1000 ft 1000 ft
1024x768 1000 ft 850 ft
1280x1024 850 ft 750 ft
Resolution
1920x1200 750 ft 700 ft
Table 3 -
Recommended maximum
CATx cable length from
sender to the receiver
Model UVA-4 and UVA-8
6
3.2 Compensation Adjustment Procedure on URA Receivers
•If possible, display a video test pattern on your video source when
adjusting the URA receiver. This allows the user to properly adjust the
receiver to optimal conditions.
•Apply power to the receiver. Wait until all LED’s are turned off
•Press the SEL button once to enter Adjustment-mode.
•In Adjustment-mode, all three (3) LEDs will be illuminated.
•The UP or DOWN buttons can now be used to adjust the high
frequency (HF) compensation up or down until the video no longer
looks smeared (see figure below).
•While using the UP and DOWN buttons, if an upper or lower limit of
adjustment is reached, the LED’s will blink for each continued press
of the UP or DOWN button.
•Pressing both the UP & DOWN buttons together will reset the high
frequency (HF) compensation back to zero.
•To exit the Adjustment mode at any time, press the SEL button until
all LED’s are OFF (the unit also has a built-in 1 minute timeout)
Figure 3 - Typical test patterns used for adjusting compensation
Figure 4 - Effect of adjustment on the smearing
4 or 8 Channel Splitter PC Video & Audio over Twisted-Pair Receivers
7
3.3 Advanced Brightness Adjustment on URA Receivers
The URA series of devices can equalize the brightness of the video by reducing
smearing.
•Apply power to the receiver. Wait until all LED’s are turned off
•Press the SEL button once to enter Adjustment-mode.
•In Adjustment-mode, all three (3) LEDs will be ON solid.
•Press and hold the SEL button for at least 3 seconds to enable the
Video Brightness Adjustment Mode (previously called Wire Gauge
Mode).
•In Video Brightness Adjustment Mode, the GREEN and BLUE
LED’s will be blinking.
•The UP button raises the video brightness level.
•The DOWN button lowers the video brightness level.
•Pressing BOTH the UP and DOWN buttons at the same time will
reset the Video Brightness to the default setting.
•While using the UP and DOWN buttons, if an upper or lower limit of
the adjustment is reached, the brightness will no longer change with
each button press.
•To exit the Video Brightness Adjustment mode at any time, press
the SEL button until all LED’s are ON solid (Adjustment-mode).
Press the SEL button repeatedly until all LED’s are OFF indicating the
unit is ready for operation. (The unit will automatically return to this
mode after 1 minute if no buttons are pressed).
Note
The Video Brightness adjustment may not be noticeable when only using 1 device.
When products are daisy-chained using the –XT version the adjustment is easier to
observe.
Model UVA-4 and UVA-8
8
3.4 Why Skew Adjustment?
UTP cables have 4 twisted pairs inside. The Hall Research UVA/URA video
transmission on UTP uses 3 individual pairs for each color (Red, Green, & Blue).
Figure 5 - skew mechanism, example
As shown in the figure above, a characteristic of CAT5/5e/6 cable is that the pairs of
wires twist at different rates.
Therefore, for a given length of CAT5/5e/6 cable the total length of any particular
pair could be longer than other pairs in the same cable. Since the signals travel
along the length of each pair at a fixed speed, the arrival times of signals will be
skewed in a long cable (those that have to travel farther arrive later and the
corresponding color shifts to the right). This is viewed on the monitor as separation,
or lack of convergence in colors. For example, a vertical white line on the screen
may look to have a red tinge on the left edge and blue tinge on the right edge. This
effect gets worse at high resolutions, high refresh rates, long cables (in excess of
200 feet), and depends on the cable construction itself.
If you are using special UTP cables that are specifically designed for video
transmission (such as Hall Research Zero-Skew™), then there should be no shift in
color alignment regardless of the cable length. However, in many applications
standard and common CAT5/5e/6 cables can be utilized, this will necessitate a
receiver that can also move each color component to the left and right in order to
realign them.
300 ft of CAT6 (1280x1024 source)
* actual zoomed photo of screen *
After skew adjustment
Figure 6 – Example of Skew manifested
Dieses Handbuch passt für folgende Modelle
1
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