Thank you for purchasing one of our products. Please read this manual before using this
product. When using this product, always follow the instructions contained in this manual,
and pay attention to the safety information.
Do not expose this product to water, rain or moisture.
Doing this can result in electric shock or re.
Never take this product apart or try to modify it.
Doing so is very dangerous and could result in electric shock.
Do not store this product near open ame.
Do not use this product near open ame or place lit or ammable items, such as
candles, incense, ect., on it.
Do not place any containers lled with water or other liquids near this product.
Doing so could result in re or electric shock if the liquid spills and enters the product or
gets it wet. If a liquid spills near this product, unplug the product immediately.
Do not remove or insert the power supply with wet hands.
Doing so could result in electric shock.
Do not use the power supply in any of the following ways.
Doing so could result in re or electric shock.
Modifying or heating the power cable
Damaging the power cable
Bending or tugging on the power cable unnecessarily
Knotting or kinking the power cable
Setting heavy objects on the power cable
When moving this product , rst unplug the power supply from the outlet. Do not
tug the cable or move this product with the power supply plugged into the outlet.
Doing so could damage the cable, possibly resulting in re or electric shock.
To reduce the risk of electric shock, do not remove the cover.
No parts inside the product can be serviced by the user. If your product needs service
contact:
Compu-Video Systems Inc. at (845) 737-7009.
Usage Environment
Avoid using or storing this product in areas such as those listed below. Doing so could
damage the product or cause it to malfunction.
Areas exposed to heat or ames
Humid areas and areas where water is used
Handling this product
Do not drop or apply a strong force to this product or any included or connected parts.
Do not spill liquids around or inside this product or drop ammable objects around or
inside it.
Power Supply
Only use the supplied power supply which is designed specically for this product.
Do not allow the plug to come into contact with metal or water.
This Product is not designed for contact medical use
Do not use this product for medical applications that could result in patient contact.
The information in this manual is believed to be accurate. It is intended for professional
end users having the skills to evaluate and use the data properly. Compu-Video assumes
no liability in connection with damages incurred while using this product.
P.O. Box 749 Peekskill, NY 10566 Tel: (845) 737-7009 Fax: (845) 737-0426 Web: www.compuvideosystems.com
Model # Of Inputs # Of Outputs Controls Special Features
DA-220 2 2 Per Input
Gain & HF
Adjustments
Ground Loop
Protection
P.O. Box 749 Peekskill, NY 10566 Tel: (845) 737-7009 Fax: (845) 737-0426 Web: www.compuvideosystems.com
The DA-220 set includes a 12VDC @ 500mA power supply that plugs into 120VAC. A
220VAC unit is available by special order.
While the DA-220 has rubber feet for table top use, it can be wall mounted by simply using
the cover side ange mounting holes. (4) #8 screws are recommended for mounting.
Installation And Removal Of A Board
(BS) From The CH-1 Chassis.
1) Remove power from the system by unplugging the power pack from the power
source.
2) Remove the 2 screws holding the top cover on the chassis.
Removal of a BS:
A) Remove the 2 screws holding the front panel in place. For Short boards remove the
screw from the side of the card guide. Then unplug the board by gently pulling the
board towards the front of the chassis. Long Boards have the front panel attached to
the board, while short boards have a separate, blank front panel.
B) On the rear of the unit the connector board that must be removed if a complete boards
set is being changed. As there are no electronics on the rear board you do not need
to change it for repair purposes. Using a small Phillips head screwdriver, remove the
top and bottom screw from the connector panel. Carefully, holding on to a connector,
pull the panel away from the rear of the chassis. Put the main board and the connector
board together.
Fig. 1
Chassis Font & Board View
P.O. Box 749 Peekskill, NY 10566 Tel: (845) 737-7009 Fax: (845) 737-0426 Web: www.compuvideosystems.com
Installing a Board Set in an open slot:
A) Holding the board so that the components face up, carefully slide the board into the
slot. Seat the board in the mating connector in the motherboard. If you meet any
resistance, remove the board and check for bent pins and a misaligned mating
connector in the back of the slot. After correcting the error, reinstall the board. Then
for long boards (Fig.1) reinstall both screws that hold the board in place.
B) On the rear of the unit you need to install the connector eld. Carefully align the top pin
on the back of the connector eld with the top pin on the internal connector on the rear
of the chassis. There may be open slots on the connector in the chassis. After the
connector panel is installed, using a small Philips head screwdriver, install the two
mounting screws in the panel.
C) Once the boards have been removed/installed you can reconnect the video cables.
D) Attach a test monitor the recently installed BS and test for proper operation. Check
for video. If none is present, check the installation of the rear connector eld for a
misalignment. Reset the rear connector panel and test again. Align the board as
specied.
E) For Short Boards (Fig 1), once the board has been adjusted, Install the blank front
panel on the CH-1 with the 2 small screws. Then reinstall chassis cover.
If any problems persist, call 845-737-7009 and ask for tech support.
Fig. 2
Standard Rear View
P.O. Box 749 Peekskill, NY 10566 Tel: (845) 737-7009 Fax: (845) 737-0426 Web: www.compuvideosystems.com
The green LED indicates the presence of video and the red LED indicates which position
the switcher output is viewing.
Input 1
Input 2
Video Present
Indecator For Input 1
Switcher Selection
For Input 1
Video Present
Indecator For Input 2
Switcher Selection
For Input 2
Fig. 3
Front Panel View
P.O. Box 749 Peekskill, NY 10566 Tel: (845) 737-7009 Fax: (845) 737-0426 Web: www.compuvideosystems.com
DA-220 (2) 1x2 Distribution Amplier, Coax
Video:
Inputs: Composite Video
Input Connectors: BNC
Input Level: 1vpp Into 75 Ohms
Input Impedance: 75 ohm +/-5%
Output: 2x Per Input
Output Connector: BNC
Output Impedance: 75 ohm +/-5%
Gain In/Out: +/-3dB
Diff Gain: <1%
Diff Phase: <1°
Frequency Response: 0-15mHz +/- .5dB
Power / Supply Hum: <63dB
H Tilt: <1%
V Tilt: <1%
CCMR: Type. 60dB @4Mhz
High Freq. Boost: Type 0+/- 10dB
Power Requirements:
DC Operation: 12 to 18VDC Isolated Source
Power Connector: 3.5mm Phono
Mechanical:
Size: 5.50”W x 6.25”D x 1.6”H
Weight: 1.0lbs
KEY FEATURES:
·(2) 1x2 Distribution amp ·High quality Color video performance
·Differential inputs ·Industrial grade specications
·Variable gain control ·HF Compensation
·Coax Inputs ·Made in the USA
The DA-220 is a Differential input, ground loop blocking, high performance Dual 1x2 Color
Video Distribution Amplier. The DA-220 has Gain and HF adjust to compensate for
signal loss for each channel. The differential input amplier is used to minimize or eliminate
ground loop problems. Will compensate for approx. 1200 feet of coax.
LIMITED WARRANTY:
Compu-Video Systems warrants this product and all accessories provided with it to be
free of defects in material and workmanship for a period of 5 years after the original date
of purchase. This warranty does not cover damage to the product resulting from accident,
misuse or modication.
How The Warranty Works
If this product, or any of the accessories supplied with it, become defective within the
warranty period, Compu-Video Systems Inc. will at its discretion repair, or replace the
product with an equivalent unit of equal or higher value without charge. Overland return
transportation from Compu-Video Systems Inc. to the user is free of charge.
How To Get Service
Please contact CVS by phone for return authorization number and then return the
defective unit, transportation prepaid and a dated proof of purchase to:
Compu-Video Systems Inc.
37 Arden Drive
Garrison, NY 10524
The customer is responsible for all costs incurred from shipping the product back to
Compu-Video Systems.
Obtaining Technical Help/Service
Web Site: www.compuvideosystems.com
Phone: (845) 737-7009
Fax: (845) 737-0426
In no event shall Compu-Video Systems Inc.
be liable for Consequential Damages.
Some states do not allow exclusion or limitation of incidental or consequential damages,
so the above limitation may not apply to you. This warranty gives you specic legal rights,
and you may also have other rights which vary from state to state.
P.O. Box 749 Peekskill, NY 10566 Tel: (845) 737-7009 Fax: (845) 737-0426 Web: www.compuvideosystems.com
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