VGA Converter / Scaler
User Manual
DVI-3221a
Table of Contents
Section Page
1.0 INTRODUCTION …………………………………………………………………...1
1.1 Features………………...………………………………………………………...1
1.2 Getting the Best Results………………………………………………………...1
2.0 SPECIFICATIONS…………………………………………………………………. 2
3.0 CHECKING THE PACKAGE CONTENTS……………………………………… 3
4.0 CONNECTING THE HARDWARE………………………………………………..3
4.1 Connecting the Input……….…………………………………………………... 3
4.2 Connecting the Output………………………………………………………….. 3
4.3 Connecting Power to the Unit………………………………………………….. 3
5.0 TYPICAL USES……………………………….…………………………………….4
6.0 CONTROLLING THE SCALER……………………………….…….…………….5
6.1 Input Setup…..…………………………………………………………………... 5
6.2 Output Setup….……………………………………………………………….... 5
6.3 Operation Controls and Functions…………………………………………......6
6.4 HV Reset…………..…………………………………………………………...... 6
6.5 OSD Adjust…………….……………………………………………………....... 6
6.6 System Information…………………………………………………………....... 6
6.7 Auto Adjust………..………………………………………………………….......6
7.0 TROUBLESHOOTING……………………………………………………………..7
8.0 WARRANTY POLICY……………………………………………………………. ..7
9.0 REGULATORY COMPLIANCE…………………………..…………………….. ..7
1.0 INTRODUCTION
Thank you for purchasing this VGA Converter / Scaler from DVIGear, Inc.. The DVI-3221a
is designed to convert between a wide variety of PC resolutions, and many HDTV
resolutions. Our professional conversion and scaling products have been serving the
industry for several years. In addition to VGA Converter / Scaler, DVIGear, Inc. offers a full
line of high quality Scan Converters, Standards Converters, DV-to-Analog Converters,
Switchers and Distribution Amplifiers.
1.1 Features
• Ultra Compact, High Performance Units
• Convert PC-to-PC, PC-to-HD, HD-to-PC or HD-to-HD
• Convert RGBHV to/from YPbPr
• PC Resolutions to 1280x1024
• HDTV Scan Resolutions
• 48MB Frame Memory
• Integral Picture Adjustments
• On Screen Display for Setup and Adjustment
• Rugged Metal Case
• Locking DC Power Connector for Security
1.2 Getting the Best Results
There are many factors affecting the quality of results when scaling signals. Some basic
precautions will ensure the best possible performance from your converter/scaler.
• Output display device – The quality of the output signal will depend largely upon
the type and quality of display device used. For instance, some video projectors just
look better than others.
• Using Native Resolution – It is always best to set the output resolution of the scaler
to the native resolution and refresh rate of the display device. This allows our scaler
to do most of the work, which usually results in a superior picture.
• Distance between the VGA Converter / Scaler and the display device – This
plays a major role in the final result. Long distances are possible, but special
measures should be taken in order to avoid cable losses. These include using high
quality (coax-type) cables or adding line amplifiers.
• Output connection cables – Low quality cables are susceptible to interference.
They degrade signal quality due to poor matching and cause elevated noise levels.
Therefore, cables should be of the best quality. Coax-type computer cables are
recommended because of their superior internal shielding characteristics.
• Interference from nearby electrical devices – These can have an adverse effect
on signal quality. For example, an older computer monitor often emits very high
electromagnetic fields that can interfere with the performance of video equipment in
its proximity.
-- 1 --
2.0 SPECIFICATIONS
Input Format (Note 1)
Input Signal Levels
Output Format
Output Signal Levels
Input/Output Connector Type
Control
Information Display
Video Adjustments
Weight
Dimensions – HxWxD
Power Source
RGBHV, YPbPr, YCbCr
RGB @ 0.7V p-p, 75Ω. H&V Sync @ 3-5V p-p, TTL
Y @ 1V p-p, 75Ω. Pb, Cb, Pr, Cr @ 0.7V p-p, 75Ω
RGBHV, YPbPr
RGB @ 0.7V p-p, 75Ω. H&V Sync @ 3-5V p-p, TTL
Y @ 1V p-p, 75Ω. Pb, Pr @ 0.7V p-p, 75Ω
HD15 Female
Front Panel Buttons
On Screen Display
Brightness, Contrast, Color, R-G-B Levels
10 oz. (280 grams)
1.2” x 3” x 5.5” (30x75x140mm)
115VAC to 12VDC@800mA In-Plug Switching Adapter
(Note 1)
Input Signal Specifications
PC Resolutions Vert Rate Format Scan Type
VGA
VESA85
VGA70
SVGA
XGA
Mac
WXGA
1280A
SXGA
640x480
640x400
720x400
800x600
1024x768
1152x864
1280x768
1280x960
1280x1024
60, 72, 75, 85 Hz
85Hz
70Hz
60, 72, 75, 85 Hz
60, 70, 75, 85 Hz
70, 75 Hz
60Hz
60Hz
60, 75 Hz
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
HDTV Resolutions Vert Rate Format Scan Type
480p
480i
576p
576i
720p
1080i
720x480
720x480
720x576
720x576
1280x720
1920x1080
60Hz
60Hz
50Hz
50Hz
60Hz
60Hz
YPbPr, RGBHV
YCbCr, RGBHV
YPbPr, RGBHV
YCbCr, RGBHV
YPbPr, RGBHV
YPbPr, RGBHV
Progressive
Interlace
Progressive
Interlace
Progressive
Interlaced
Output Signal Specifications
PC Resolutions Vert Rate Format Scan Type
VGA
VESA85
VGA70
SVGA
XGA
Mac
WXGA
1280A
SXGA
640x480
640x400
720x400
800x600
1024x768
1152x864
1280x768
1280x960
1280x1024
60, 72, 75, 85 Hz
85Hz
70Hz
60, 72, 75, 85 Hz
60, 70, 75, 85 Hz
70, 75 Hz
60Hz
60Hz
60, 75 Hz
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
RGBHV
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
Progressive
HDTV Resolutions Vert Rate Format Scan Type
480p
576p
720p
1080i/540p
(Note 3)
720x480
720x576
1280x720
1920x1080
60Hz
60Hz
60Hz
60Hz
YPbPr, RGBHV
YPbPr, RGBHV
YPbPr, RGBHV
YPbPr, RGBHV
Progressive
Progressive
Progressive
Pseudo
Inter-laced
Note 1 - The 1080i Output is actually a doubled 540p signal. It will appear as 1080i
on most displays, however, it is not a true 1080i signal format.
-- 2 --
3.0 CHECKING THE PACKAGE CONTENTS
The following items are contained in shipping carton:
• Scaler Unit
• AC/DC Power Adapter
• HD-15 to 3 RCA Cable
• HD-15 to HD15 Cable
• User Manual
Note - Please retain the original packing material should the need arise to return the unit.
4.0 CONNECTING THE HARDWARE
The first step is to connect a video source to the input of the Scaler and to connect its
output to a display device. Below is a drawing of the unit.
4.1 Connecting the Input
The DVI-3221a VGA Converter / Scaler can accept RGBHV, YPbPr and YCbCr inputs.
When a PC (RGBHV) source is used, select an HD-15 to HD-15 Cable to connect the
source device to the Scaler Input. When an HDTV (YPbPr or YCbCr) source is used,
select an HD-15 to 3-RCA Cable to connect the source device to the Scaler Input. The
Scaler will automatically detect the input signal resolution and format.
4.2 Connecting the Output
The DVI-3221a VGA Converter / Scaler can output RGBHV or YPbPr formats. When a
PC (RGBHV) output is used, select an HD-15 to HD-15 Cable to connect the Scaler
Output to the destination device. When an HDTV (YPbPr) output is used, select an HD-15
to 3-RCA Cable to connect the Scaler Output to the destination device. .
4.3 Connecting Power to the Unit
The VGA Converter / Scaler is shipped with an In-Plug Power Adapter to convert
115VAC@50-60Hz to 12VDC (220VAC Input is optionally available). Connect the DC
Output Cord from the Power Adapter to the back of the unit and then plug the Power
Adapter into an AC Receptacle. When the unit’s front panel Power Switch is turned On,
the Power LED indicator will illuminate.
-- 3 --
5.0 TYPICAL USES
The DVI-3221a VGA Converter / Scaler is capable of many types of signal conversion.
Below are some common examples of tasks that are within the scope of their capability,
depending upon which model is used.
-- 4 --
6.0 CONTROLLING THE SCALER
The Scaler is controlled via three buttons and status is indicated by OSD.
• Menu Button: This Button displays the Menu Options via the On Screen Display on
the display device connected to the output. 6.1 thru 6.7 detail the sub-menus.
• + and - Buttons: These Buttons allow navigation within the Menu and adjustments
of the parameters available.
• XGA Reset: Simultaneously depressing the – and + buttons returns settings to
factory defaults and sets the output to XGA.
• 480p Reset: Simultaneously depressing the MENU and - buttons returns settings to
factory defaults and sets the output to 480p
6.1 Input Setup
When this is selected, a sub-menu of clock and phase adjustments will appear:
Clock 32/64
Phase 22/32
Use + and – Buttons to choose the parameter you want to adjust and then press the Menu
(Enter) to highlight your selection. Once a parameter is highlighted, use + and - Buttons to
increase or decrease the value of the setting. Press Menu again to leave the setting.
Move the arrow to Exit, then press Menu/Enter to Exit.
6.2 Output Setup
When this is selected, the following Output Resolution sub-menu will appear:
PC Resolution HDTV Resolution
SXGA
1280A
XGA
WXGA
SVGA
VGA
VGA70
VESA85
1280x768@60/75Hz
1280x960@60Hz
1024x768@60/70/75/85Hz
1280x768@60Hz
800x600@60/72/75/85Hz
640x480@60/72/75/85Hz
720x400@70Hz
640x400@85Hz
1152x864@70/75Hz
720p-RGB
576p-RGB
480p-RGB
1080i-RGB
720p-YPbPr
576p-YPbPr
480p-YPbPr
1080i-YPbPr
(Pseudo Interlace - See Note 1 on Page 2)
1280x720@60Hz
720x576@60Hz
720x480@60Hz
1920x1080@60Hz
1280x720@60Hz
720x576@60Hz
720x480@60Hz
1920x1080@60Hz
-- 5 --
Use the + and – Buttons to choose the desired PC or HDTV output resolution from the
available selections in the sub-menu.
6.3 Operation Controls and Functions
When this is selected, the following Picture Adjust sub-menu will appear:
Contrast 047
Bright 102
Color 064
Red 128
Green 128
Blue 128
Reset
Exit
The adjustment range for Contrast, Brightness, Red, Green and Blue is 0-255 for each.
The factory default preset values are listed to the right of the adjustment box pictured
above. Use the + and – Buttons to adjust the value of the selected parameter. Select
Reset to set all adjustments to the factory default values.
6.4 HV Adjust
When this is selected, the following Horizontal and Vertical Position Adjust sub-menu will
appear. Use the + and – Buttons for the best H and V Position of the picture.
H-position 184
V-position 32
6.5 OSD Adjust
When this is selected, you can adjust the Horizontal and Vertical Position of the On
Screen Display within the video image on the screen.
6.6 System Information
When this is selected, the OSD shows the Scaler’s current Input and Output Resolution
and Vertical Refresh Rate, such as:
INPUT: VGA 60
OUTPUT: XGA 75
6.7 Auto Adjust
When this is selected, the Scaler will automatically adjust all the parameters to the factory
default values. The factory default of the Output Resolution is XGA (1024x768) @ 60Hz.
-- 6 --
Simultaneously pressing and holding the + and – Buttons will also return the unit to the
factory default settings and the output to XGA@60Hz.
Note: The Scaler has a “last setting memory”, so the current settings will be retained
when the power is turned off and the unit will return to those settings when the power is
turned back on.
7.0 TROUBLESHOOTING
Other than checking for faulty cables, the only common problem would be choosing a
wrong Output Setting. Make sure the display is capable of handling the resolution and
refresh rate selected and make sure the output format selected (RGB or YPbPr) for the
type of cable being used at the output. If a problem persists, please consult your Dealer or
contact DVIGear, Inc. Technical Support directly by phone at 888-463-9927 (US-Canada
toll free) or 770-421-6699 or by email at support@dvigear.com.
8.0 LIMITED WARRANTY
DVIGear, Inc. warrants the original purchaser that the equipment it sells will be free from
defects in materials and workmanship for a period of three years from the date of
purchase. Should this product, in DVIGear, Inc.'s opinion, prove defective within this
warranty period, DVIGear, Inc., at its option, will repair or replace this product without
charge. Any defective parts replaced become the property of DVIGear, Inc.. This warranty
does not apply to those products which have been damaged due to accident,
unauthorized alterations, improper repair, modifications, inadequate maintenance and
care, or use in any manner for which the product was not originally intended.
If repairs are necessary under this warranty policy, the original purchaser must obtain a
Return Authorization Number from DVIGear, Inc. and return the product to a location
designated by DVIGear, Inc., freight prepaid. The repaired product will be returned, freight
prepaid.
LIMITATIONS - All products sold are "as is" and the above Limited Warranty is in lieu of
all other warranties for this product, expressed or implied, and is strictly limited to three
years from the date of purchase. DVIGear, Inc. assumes no liability to end-users for any
loss of use, revenue or profit.
DVIGear, Inc. makes no other representation of warranty as to fitness for the purpose or
merchantability or otherwise in respect of any of the products sold. The liability of
DVIGear, Inc. with respect to any defective products will be limited to the repair or
replacement of such products. In no event shall DVIGear, Inc. be responsible or liable for
any damage arising from the use of such defective products whether such damages be
direct, indirect, consequential or otherwise, and whether such damages are incurred by
the reseller, end-user or any third party.
9.0 REGULATORY COMPLIANCE
The VGA Converter / Scaler has been tested for compliance with: FCC Class B and CE
The Power Adapter has been tested for compliance with: UL, CSA and CE
-- 7 --
Your Digital Connectivity Experts
Toll Free: 888.463.9927
Phone: 770.421.6699
Fax: 770.234.4207
www.dvigear.com
1059 Triad Court
Suite 8
Marietta, GA 30062-2258
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