MANUAL PART NUMBER: 400-0039-003
PRODUCT REVISION: 1
VA6834FC
SYSTEM ANALOG INTERFACE
USER’S GUIDE
Page 2
INTERFACES
INTRODUCTION
Altinex appreciates your purchase of the
VA6834FC Analog Interface. We are sure you will
find it to be reliable and simple to use.
Superior performance for the right price, backed by
solid technical and customer support is what
Altinex has to offer.
The product you are holding in your hands is
designed using state-of-the-art technology and is
superior to anything available on the market. You
will find this and our other products reliable, long
lasting, and simple to operate.
We are committed to providing our customers with
signal management solutions to the most
demanding audio-visual installations at very
competitive pricing.
We appreciate your selection of our products and
are confident that you will join the ranks of our
many satisfied customers throughout the world.
CONTACT INFORMATION ..............................13
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INTERFACES
PRECAUTIONS / SAFETY WARNINGS1
Please read this manual carefully before using your
VA6834FC Interface. Keep this manual handy for
future reference. These safety instructions are to
ensure the long life of your VA6834FC and to
prevent fire and shock hazard. Please read them
carefully and heed all warnings.
1.1 GENERAL
• Unauthorized personnel shall not open the unit
since there are high-voltage components
inside.
• Qualified Altinex service personnel, or their
authorized representatives must perform all
service.
1.2. SAFETY GUIDELINES FOR THE RACKMOUNTING OF THE VA6834FC
• Maximum operating ambient temperature is 35
(degrees C).
• Never restrict the airflow through the devices’
fan or vents.
• When installing equipment into a rack,
distribute the units evenly. Otherwise,
hazardous conditions may be created by an
uneven weight distribution.
• Connect the unit to a properly rated supply
circuit.
• Reliable Earthing (Grounding) of RackMounted Equipment should be maintained.
1.3 INSTALLATION
• For best results, place the VA6834FC
Interface on a flat, level surface in a dry area
away from dust and moisture.
• To prevent fire or shock, do not expose this
unit to rain or moisture. Do not place the
VA6834FC Interface in direct sunlight, near
heaters or heat radiating appliances, or near
any liquid. Exposure to direct sunlight, smoke,
or steam can harm internal components.
• Handle the VA6834FC Interface carefully
because dropping or jarring can damage
internal components.
• Do not place heavy objects on top of the
VA6834FC. If the VA6834FC is to be mounted
to a table or wall, use only Altinex made
mounting accessories, such as brackets
(DA1293FC or DA1294FC) and cables for
optimum setup.
• To turn off the main power, be sure to remove
the power cord from the power outlet. The
power outlet socket should be installed as
near to the equipment as possible, and should
be easily accessible.
• Do not pull the power cord or any cable that is
attached to the VA6834FC Interface.
• If the VA6834FC Interface is not used for an
extended period, disconnect the power cord
from the power outlet.
1.4 CLEANING
• Unplug the VA6834FC power cord before
cleaning. Clean surfaces with a dry cloth.
Never use strong detergents or solvents, such
as alcohol or thinner. Do not use a wet cloth or
water to clean the unit.
1.5 FCC / CE NOTICE
• This device complies with Part 15 of the FCC
Rules. Operation is subject to the following two
conditions: (1) This device may not cause
harmful interference, and (2) this device must
accept any interference received, including
interference that may cause undesired
operation.
• This equipment has been tested and found to
comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide
reasonable protection against harmful
interference when the equipment is operated
in a commercial environment. This equipment
generates, uses, and can radiate radio
frequency energy and, if not installed and
used in accordance with the instruction
manual, may cause harmful interference to
radio communications. Operation of this
equipment in a residential area is likely to
cause harmful interference in which case the
user will be required to correct the interference
at his own expense.
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INTERFACES
• Any changes or modifications to the unit not
expressly approved by Altinex, Inc. could void
the user’s authority to operate the equipment.
ABOUT YOUR INTERFACE2
There are many types of computers and computer
video cards on the market today. There are also
numerous data monitors and large screen data
projectors. When a computer image is displayed on
a large screen data projector or on a large screen
monitor, it often becomes clear that some
computers are not always compatible with certain
display devices. The VA6834FC is a computer
video interface designed to resolve this
incompatibility.
The VA6834FC is a dual output computer video
interface. It is designed to interface a single VGA/
SVGA/XGA/UXGA/MAC/SUN or SGI computer
video source to two scan-rate compatible
presentation monitors or data projectors.
It is important to understand the general
capabilities of interfaces. Interfaces do not change
the scan-rate or the resolution of the video signal.
An interface simply converts a computer video
signal to a pre-selected analog format.
The VA6834FC is a state-of-the art piece of
equipment with an exceptional combination of
compact size, advanced features and very
competitive pricing.
TECHNICAL SPECIFICATIONS3
FEATURES/DESCRIPTIONVA6834FC
GENERAL
Inputs
Computer Video Input
Connector
Outputs
Local Monitor Connector15-pin HD Female
Main Video Connector2 sets of 6-BNC F
Analog Signal0.3 to 1.2 volt p-p
Impedance75 Ohms
Rise/Fall Time (ns)0.9
Input Sync Signal
Horizontal, Vertical, & C-TTL(+/-)
Sync
Sync on Green-0.3V
Impedance0.3 k Ohms
Output Video Signals
Analog Signal0.77 V p-p
Impedance75 Ohms
Rise/Fall Time (ns)1.2
Output Sync Signal
Composite SyncTTL(+/-)
Sync on Green-0.3V
Impedance22 Ohms
Frequency Compatibility
Minimum Video Bandwidth350 MHz
Typical Video Bandwidth425 MHz
Horizontal15-130 kHz
Vertical25-180 Hz
Horizontal Position Range
Cross-talk
Power
Internal Power Supply90-140V/200-240V
Power Consumption
20 %
39dB @ 100MHz
Table 3. VA6834FC Electrical
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INTERFACES
VA6834FC DESCRIPTION4
The VA6834FC has two key functions. Its first
function is to buffer the signal and insure that it is
strong enough to travel a distance of 100 ft or
longer through a coaxial cable. The second
function is to process the sync and to convert it into
a format that is acceptable to most displays.
4.1 COMPUTER VIDEO INPUT (VGACOMPATIBLE HD 15-PIN CONNECTOR).
The HD 15-pin connector input allows the
connection of a computer source to the interface
using Altinex input cables, which are available
for a variety of popular computers and graphics
cards on the market. These include VGA, MAC,
SUN, and SGI type video output connectors with
the proper cables. The VA6834FC input is
compatible with standard VGA cables.
PIN
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Table 4. VA6834FC Input pin-out
4.2 LOCAL MONITOR OUTPUT (HD 15-PIN
CONNECTOR)
The HD 15-Pin connector output is used to
connect the local monitor to the interface. This is
a fully buffered output, eliminating reflections
often caused by “Y” type monitor breakout
cables. There is no need to terminate the
unused output. The termination switch on the
VA6834FC affects only the terminations of the
computer video input. The output is VGA
compatible, but can also be used to feed other
INPUT SIGNALS ON HD 15-PIN FEMALE
CONNECTOR
Red Video
Green Video
Blue Video
ID Bit (Grounded when ID Bit switch is ON)
Ground
Ground
Ground
Ground
No connection
No connection
ID Bit
ID Bit
Horizontal Sync/Composite Sync
Vertical Sync
No connection
types of local monitors using designated Altinex
adapter cables such as VGA, MAC, SUN, SGI or
RGB.
PIN
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LOCAL MONITOR OUTPUT SIGNALS ON
15-PIN HD FEMALE CONNECTOR
Red Video
Green Video
Blue Video
ID Bit (Grounded when ID Bit switch is ON)
Ground
Ground
Ground
Ground
Composite Sync
No connection
ID Bit
ID Bit
Horizontal Sync
Vertical Sync
No connection
Table 5. Local Monitor Output pin-out
4.3 MAIN (RGBS/RGBHV) OUTPUTS THROUGH
6 BNC CONNECTORS
BNC connectors offer a reliable connection for
high-resolution video signals, and they facilitate
easy cable maintenance in the field. The
VA6834FC offers two main outputs with six BNC
connectors for each output. By selecting the
appropriate connectors, these outputs can
provide RGSB, RGBHV, or RGBS output signals.
For a RGsB type signal the “Sync on Green” dip
switch must be set to the ON position.
For an RGBHV type signal, you may either
connect cables to horizontal or vertical BNC
connectors or you may connect the horizontal
channel to the composite sync connector by
turning the HV OUTPUT switch to the ON
position. For a RGBS type signal output, the
cables should be connected to a composite sync
signal. With these connectors the VA6834FC
can be connected to compatible data projectors
using 3 coax, 4 coax, or 5 coax cables.
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INTERFACES
5
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INTERFACES
6
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INTERFACES
CONNECTORMAIN DUAL OUTPUT (6-BNC
FEMALE)
Red
Green
Blue
Sync
Hor.
Vert.
Red Video
Green Video
Blue Video
Composite Sync/ Horizontal
Horizontal Sync
Vertical Sync
Table 3. VA6834FC dual (6 BNC) Output pin-out
4.4 HORIZONTAL POSITION ADJUSTMENT
Most monitors and projectors have the ability to
adjust the horizontal position of the image, but
sometimes it is helpful to be able to control this
feature at the interface. This control is especially
useful when multiple computers are switched to
a single display and the horizontal positions from
each computer are slightly different.
By keeping the VA6834FC’s horizontal position
control dial located in the center position, the
image on the display should be adjusted using
the monitor or projector control. If it is
necessary, adjust the horizontal position of the
image with the VA6834FC’s horizontal position
control dial.
To turn off the horizontal position control, turn
the adjustment dial fully to the right until a
“clicking sound is heard.
4.5 HORIZONTAL DELAY REMOVAL
The VA6834FC offers the ability to by-pass
horizontal delay. This may be necessary when
interfacing with projectors or monitors with
sensitive sync inputs, particularly with LCD type
projectors. By turning the horizontal position
adjustment dial fully to the right, the control will
“click” into a locked position. In this position, the
VA6834FC outputs the same sync type as that
which is fed into it from the source. In this
setting, the VA6834FC will not provide horizontal
positioning. Horizontal position adjustment
must be made at the display.
4.6 POWER REQUIREMENTS
The VA6834FC may be used with either 120V or
220V throughout the world for ease of use.
Always make sure that the fuse box window
above the power input connector displays the
proper voltage. To change the setting, unplug
the VA6834FC, and squeeze the clips on either
side of the fuse box. Pull out the fuse holder and
turn it 180 degrees, resetting it with the proper
voltage shown through the window. Re-insert
the fuse box making sure that the side clips of
the fuse box lock securely into place.
4.7 MOUNTING CAPABILITY
The VA6834FC can be easily mounted into an
equipment rack. Four mounting holes are
provided on each side of the unit. To mount a
single unit, use Altinex 19”-1U Rack Mount Ears
(part # DA1294FC). To mount two units in
tandem, use an Altinex 19”-1U Rack Mount
Shelf (part # DA1293FC). For mounts under the
table, optional brackets, such as theTM1271,
TM1272, TM1273, or TM1274 can be used.
4.8 BANDWIDTH
The typical bandwidth of the VA6834FC is
425 MHz. The minimum bandwidth is 350 MHz.
This exceptionally high bandwidth allows the
passing of the third harmonics of the video
signal, thus maintaining the highest quality of
the input signal.
7
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APPLICATION DIAGRAM5
INTERFACES
INSTALLING YOUR INTERFACE6
Step 1.Please attach the Interface on the rack
using the provided rack mount
hardware. The Interface can also be
attached on top or under furniture using
the optional TM Series Altinex brackets.
Step 2.Before you plug in the power cord to the
unit, please verify that the voltage rating
of 110V/220V which is located on the
FUSE CLIP at the rear of the unit is the
same as the power outlet. (Refer to
section 4-6 for changing voltage)
Step 3.Connect one end of the input cable
included with the Interface unit to the
video output connector of your computer
and other end to the computer input HD15 port of the VA6834FC.
Step 4.If needed, connect the local monitor
output HD-15 connector of the
VA6834FC to the local monitor using
the appropriate Altinex Local Monitor
cables. It is not necessary to terminate
this output with a termination plug if a
local monitor is not being used.
Step 5.Connect one end of a BNC cable to
output 1 or 2 of the VA6834FC. Connect
the other end to the RGB input on the
projector or monitor. Usually either a 4
BNC or 5 BNC coaxial cable
is used, depending on whether display
devices require Composite SYNC or
H&V SYNC signals.
Step 6.Make sure that the dip- switches are set
properly. For the desired sync output
format, refer to section 7.
Step 7.It is recommended that if the Interface
horizontal position control is centered
(turned OFF), the horizontal position of
the image should be adjusted using the
control provided by the monitor or
projector. If still required, the image can
be adjusted using the horizontal position
control dial located on the front of the
VA6834FC.
CONGRATULATIONS! YOU ARE DONE.
If you experience any problems, please call
1-800-258-4623 or 1-714-990-2300 for
international calls.
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INTERFACES
OPERATION7
The settings of the VA6834FC Interface can be
adjusted using the dip-switches in Table 4. There
are no other adjustments necessary to operate the
unit. The VA6834FC will operate successfully as
long as cables are attached properly and technical
specifications are followed.
DIP SWITCHOFFON
SerrationX
HV OutputX
Sync on GreenX
TerminationX
ID BitX
Not UsedX
Table 6. Dip switches default setting
7.1 SERRATION PULSE SWITCH
Certain monitors and projectors will exhibit
better stability when the serration pulse switch is
ON. This switch is seldom used and in most
circumstances should be turned OFF.
7.2 H&V OUT SWITCH
When the composite sync channel is used and
RGBS format is desired from the VA6834FC,
the H & V OUT switch should be turned off.
When this switch is turned on, the sync. The
connector will output horizontal sync, but not
composite sync. The horizontal sync can be
connected to the sync connector and the vertical
sync signal is connected to the vertical
connector using the H & V OUT switch in the ON
position.
the boot up stage of the computer. If your
computer does not output video, place the I.D.
Bit switch in the ON position and reboot the
computer. When in the OFF position, the ID Bit
will be passed through the Local Monitor Output
port.
7.4 SYNC ON GREEN OUTPUT SWITCH
In some systems the ability of the VA6834FC to
output Sync on Green can be a very helpful
feature. It is important to know that the
VA6834FC will not separate the sync signal from
the green signal if the input is RGsB. It simply
amplifies the composite sync signal and passes
it through. The VA6834FC will combine the sync
signal and the green channel to output a RGsB
signal when the SYNC ON GREEN dip-switch is
in the ON position even if the input is in RGBS
or RGBHV format. If the desired output is RGBS
or RGBHV, then leave the SYNC ON GREEN
dipswitch in the OFF position.
7.5 TERMINATION SWITCH
When the built-in termination switch is set to the
ON position, the input of the interface will be
terminated. As a rule, the termination switch
should be ON. This switch does not affect the
termination of any output signal. The termination
switch should be left in the OFF position if a “Y”
cable is used at the local monitor output
connector.
7.3 I.D. BIT SWITCH
Many computers use ID Bits or Sense Pins to
recognize the connection of a monitor to its
video output port. Often, these ID Bits will even
allow the computer to recognize the type of
monitor connected in terms of its scan rate
compatibility. When the I.D. Bit switch is in the
ON position, the VA6834FC allows the main ID
Bit (pin 4 on the input connector) to be
connected to the ground signal. This is used
primarily when interfacing to laptop computers to
imitate the presence of a local monitor.
Typically, this recognition will take place during
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INTERFACES
ACCESSORIES8
Model No.Description
RACK MOUNT ACCESSORIES
DA1293SXRack/Wall Shelf fits two VA6834FC
units side by side
DA1294SX
TM1271
TM1272
TM1273
Model No.Description
TM1274
MS8121CAMAC Output cable for VA6834FC
MS8122CAMAC Input cable for VA6834FC
MS8123CA
MS8124CASUN/SGI Input cable for VA6834FC
MS8125CAVGA Output cable for VA6834FC
MS8126CAVGA Input cable for VA6834FC
MS8129CARGB Output cable for VA6834FC
100 ft, 5-BNC to 5-BNC coaxial
cable
150 ft, 5-BNC to 5-BNC coaxial
cable
6 ft, 5-BNC to 5-BNC coaxial
12 ft, 5-BNC to 5-BNC coaxial
25 ft, 5-BNC to 5-BNC coaxial
50 ft, 5-BNC to 5-BNC coaxial
75 ft, 5-BNC to 5-BNC coaxial
100 ft, 5-BNC to 5-BNC coaxial
150 ft, 5-BNC to 5-BNC coaxial
3 ft, 5-BNC M to 5-BNC M
6 ft, 5-BNC M to 5-BNC M
12 ft, 5-BNC M to 5-BNC M
25 ft, 5-BNC M to 5-BNC M
50 ft, 5-BNC M to 5-BNC M
75 ft, 5-BNC M to 5-BNC M
100 ft, 5-BNC M to 5-BNC M
150 ft, 5-BNC M to 5-BNC M
200 ft, 5-BNC M to 5-BNC M
250 ft, 5-BNC M to 5-BNC M
3 ft, 5-BNC M to 5-BNC M
6 ft, 5-BNC M to 5-BNC M
12 ft, 5-BNC M to 5-BNC M
25 ft, 5-BNC M to 5-BNC M
50 ft, 5-BNC M to 5-BNC M
75 ft, 5-BNC M to 5-BNC M
All MS81 series cables listed on the previous page
are 3 ft. long. These are available in 6 ft. and 12 ft.
lengths. Please call 1-714-990-2300 for a wider
selection of cables.
100 ft, 5-BNC M to 5-BNC M
150 ft, 5-BNC M to 5-BNC M
200 ft, 5-BNC M to 5-BNC M
250 ft, 5-BNC M to 5-BNC M
FAQ (FREQUENTLY ASKED QUESTIONS)9
No:QuestionAnswer
1Why does
the
termination
switch
have to be
ON?
2When and
why should
I use the
Horizontal
Position
Control
dial?
3What dip-
switch do I
set to
obtain
composite
SYNC
output?
4When and
why would
I use the
sync on
green dipswitch,
although
the unit
does not
The termination switch should
be ON if a local monitor is
connected through a straight
cable. It will be OFF only if a
monitor breakout cable is used
at the local monitor output
connector.
The Horizontal Position
Control dial enables or
disables the control of the
horizontal position of the
image. First, adjust the
horizontal position using the
monitor or projector’s control.
Then use the horizontal
Position Control of the
VA6834FC, if needed.
If the desired output signal is
composite sync, then turn OFF
the H & V OUTPUT Dip-switch
and connect only 4 wires
(RGBS) to the red, green, blue
and sync connectors.
The VA6834FC does not
separate the sync signal from
green. If the desired output is
in RGsB format, turn the sync
on green dip-switch to the ON
position. The VA6834FC
combines sync on green if the
dip-switch is in the ON
position.
separate
sync from
green?
5When do I
use the
H & V OUT
dip-switch?
6What is a
Common
Computer
Video Card
pin-out?
If the desired output is in
RGBHV format, turn ON the H
& V OUT dip-switch. If the H &
V OUT dip-switch is OFF, then
the output signal may have
composite sync present on the
horizontal sync connector.
See table 5 for pin-outs for
common computer video cards
that can be used with the
VA6834FC.
11
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INTERFACES
PIN
No.
A1
A2
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Table 7. Common Computer Video Cards pin-out.
MACVGASUN
n/an/aRed
n/an/aGreen
n/an/aBlue
Red GndRedN/C
RedGreenN/C
C.SyncBlueSense
ID Bit 01ID BitSense Rtn
GreenN/CC. Sync Sens
Green Gnd.Red Rtn.N/C
ID Bit 02Green Rtn.N/C
N/CBlue Rtn.N/C
BlueN/CN/C
ID Bit 03GndN/C
C/V Gnd.ID Bit
V. SyncID Bit
Blue Gnd.H. Sync.
H. GndV. Sync
H. SyncN/C
TROUBLESHOOTING GUIDE10
1.The power, LED should be ON when the
correct voltage is applied to Interface.
2.The Termination dipswitch should be in the
ON position if no Y cable (breakout) is used
on the input.
3.Make sure that the cables have the correct
pin-outs and the connection and quality of the
cables are good.
4.Make sure that the source and display are
scan-rate compatible. The projector should
support an appropriate signal format (RGsB,
RGBS or RGBHV). Connect the projector
directly to a computer with a shorter cable to
verify the compatibility of the display and the
source.
5. If you are using output RGBS or RGsB then
the HV Output dip-switch is in the OFF
position and the composite sync signal is
taken from the sync connector. If the display
needs an RGBHV signal then the HV Output
dip-switch should be ON if sync and vertical
connectors are used.
6. If the desired output is RGsB then the Sync
on Green dipswitch should be ON.
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INTERFACES
ALTINEX POLICY11
11.1 LIMITED WARRANTY
Altinex warrants that its products and cables are
free from defects in materials under normal use
and service. This warranty is limited to repairing
at company’s factory any part or parts of the
product, which upon company’s examination
shall disclose to be, thus defective. Products
considered defective should be returned to
company with transportation charges pre-paid
within 2 years (90 days for cables) from date of
shipment to the purchaser. The warranty is
expressly instead of all other warranties
expressed or implied. Altinex neither assumes
nor authorizes any other person to assume for it
any other liability in connection with the sale of
the products. This warranty shall not apply to
any product that shall have been repaired or
altered outside of company’s factory in any way
so as, in its judgment, to affect its stability or
reliability, or that has been subject to misuse,
negligence or accident.
If your product is out of warranty and needs
service, contact the Altinex Sales Department
for an RMA (Return Material Authorization).
Products returned without an RMA number may
experience a delay in service. The service
charges will be quoted to you before the actual
repairs are done.
11.3 CONTACT INFORMATION
Sales Department
Phone: 714-990-2300
Fax: 714-990-3303
Accounting Department
Phone: 714-990-6088
Fax: 714-990-5778
11.2 RETURN POLICY
It is very important to Altinex that you receive the
product that you have ordered and that this
product fulfills your need. In the unlikely event,
that an Altinex product needs to be returned
please follow the policies below:
Altinex will accept product returns for a period of
30 days from authorized Altinex dealers.
Products must be returned in an unopened
package.
If a product has been opened, the restocking
fees will apply. For the restocking fee amount,
please contact an Altinex Sales Representative.
If the product is in your possession for more
than 30 days, the restocking fees will apply.
Altinex will not accept any returns on cables or
custom products.
If your product is in warranty and needs service,
contact the Altinex Sales Department for an
RMA (Return Material Authorization). Products
returned without an RMA number may
experience a delay in service.
13
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