Black Box AC076A Manuale utente
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INFORMATION
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Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
AUGUST 2000
AC076A
Video Converter Pro for Mac
Video Converter Pro for Mac
UNDERSCAN
NORMAL
FL ICKER REDUCTION
NORMAL
FREEZE IMAGE
NORMAL
POWER
LOCK
1
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio frequency energy
and if not installed and used properly, that is, in strict accordance with the
manufacturer’s instructions, may cause interference to radio communication.
It has been tested and found to comply with the limits for a Class A
computing device in accordance with the specifications in Subpart J
of Part 15 of FCC rules, which are designed 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 his 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.
This digital apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques declasse A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
TRADEMARKS
Black Box and the logo are registered trademarks of Black Box
Corporation.
Mac and Macintosh are registered trademarks of Apple Computer, Inc.
RCA is a registered trademark of General Electric Co.
Any other trademarks mentioned in this manual are acknowledged to be the property
of the trademark owners.
FCC AND IC STATEMENTS, TRADEMARKS
2
VIDEO CONVERTER PRO FOR MAC
3
VIDEO CONVERTER PRO FOR MAC
Table of Contents
Chapter Page
1. Specifications .......................................................................................... 3
2. Introduction ........................................................................................... 4
3. Installation .............................................................................................. 5
3.1 Initial Steps ...................................................................................... 5
3.2 Hooking Up Video Output ............................................................. 5
3.3 Selecting Your Video Standard ....................................................... 6
3.4 Booting your Converter System ....................................................... 6
4. Operation ............................................................................................... 7
4.1 Indicators ......................................................................................... 7
4.2 Front-Panel Controlss ....................................................................... 7
4.3 Other Features ................................................................................. 8
5. What to Expect from Converted Computer Images ............................ 9
6. Troubleshooting ................................................................................... 11
Appendix A: S-Video, the Improved Quality Video Standard ................... 12
Appendix B: Connector Pinouts ................................................................. 13
4
CHAPTER 1: Specifications
Macintosh Video
Input Standards — Mac 512 x 384 resolution at 24 KHz or 640 x 480
resolution at 35.5 KHz, up to 24-bit color
Video Output Standards — Mac; NTSC or PAL: Composite video,
S-Video, RGBS
Controls — (4) External: (1) rear-mounted slide switch:
NTSC/PAL; (3) front-mounted toggle switches:
Underscan, Flicker Reduction, Freeze Image
Indicators — LEDs: (1) Power, (1) Lock
Connectors — (1) Mac Input (“VIDEO IN”): DB15HD
female; (4) Video Output: Mac (“VIDEO
OUT,” DB15HD female); NTSC/PAL:
Composite (“VIDEO,” RCA®phono jack),
S-Video (“S-VIDEO,” DIN female), RGBS
(“RGB/EXPANSION,” DB26HD female)
Power — From desktop power supply:
Input range: 95-250-VAC, 47-63 Hz
(autosensing) at 0.9 A;
Output: 5 VDC at 3.8 A
Size — 1.5"H x 7.25"W x 6.25"D (3.8 x 18.5 x 15.9 cm)
Weight — 2.9 lb. (1.3 kg)
1. Specifications
5
VIDEO CONVERTER PRO FOR MAC
The Video Converter Pro for Mac®
converts your computer’s monitor
signal into a form suitable for
recording on a VCR, displaying
on a conventional TV or video
monitor, or integrating into a multi-
media production system. No soft-
ware is required to operate the
Converter, and you won’t have to
install any boards in your computer.
Chapters 3 and 4of this manual
show you how to install and operate
your Converter. Chapter 5 gives you
some guidelines on what you should
(and shouldn’t) expect from your
converted computer images and
explains how to get the best quality
of image display. Chapter 6 gives you
tips for handling problems that
might occur with your Coverter
system. Appendix A explains what
S-Video is and why it should be used
as output from your Converter
whenever possible. Lastly, Appendix
B shows the pinouts of all of your
Converter’s connectors.
2. Introduction
6
CHAPTER 3: Installation
Follow the procedure outlined below
to install your Video Converter Pro
for Mac.
3.1 Initial Steps
1. Disconnect your monitor from
the monitor port on your Mac.
2. Connect one end of the 6-foot
cable provided with the
Converter to the monitor port
on your computer. Plug the
other end into the connector on
the rear panel of the Converter
labeled VIDEO IN. See Figure 3-1.
3. If you want your monitor to
continue to display, connect it
to the output connector labeled
VIDEO OUT. See below for a
description of this output.
4. Connect the power supply
provided with the Converter to
the connector labeled POWER.
Plug the AC-line cord into an
outlet to provide power to the
Converter. (If you ever need an
AC-line cord specific to another
country, call our sales office in
that country.)
3.2 Hooking Up Video Output
Now connect one or more of the
Converter’s four output ports to
your video equipment:
VIDEO OUT: This output is a
passthrough of the MAC IN input.
You can connect a standard computer
monitor (or a multi-sync monitor
if your system supports these) to
this output.
VIDEO: Feed this single
composite-video output signal into
the “video” input jacks on ordinary
TVs, monitors, VCRs, or professional
video equipment by using the
included composite-video cable.
This signal can’t be fed into a TV’s
or VCR’s “antenna” input.
S-VIDEO: Called S-Video, S-VHS,
or Y/C, this output is an advanced
form of video which carries the
brightness and color parts of
images on two separate signals.
It is compatible with the Hi-8 and
Beta-ED standards. Feed it into
compatible equipment by using
the included S-video cable and you’ll
get a better-quality picture than the
VIDEO output can provide.
RGB/EXPANSION: This premium-
quality output, which can be used by
some video projectors and monitors,
consists of separate red, green, blue,
and sync signals. (These signals might
also be used by expansion accessories
in the future.) Feed it into compatible
equipment by using our optional
RGBS cable with BNC connectors.
3. Installation
7
VIDEO CONVERTER PRO FOR MAC
Call us for a quote if you’d like
RGBS cable with European SCART
connectors or connectors for
Sharp LCD projectors.
3.3 Selecting Your Video Standard
Use the NTSC/PAL slide switch on
the back of your Converter to choose
which standard you’ll use for the
VIDEO, S-VIDEO, and RGB outputs.
NTSC is the video standard for the
USA, Canada, Mexico, Japan, and
parts of South America. PAL is used
throughout most of Europe, the
Middle East, Southern Asia, and
the Pacific Rim.
3.4 Booting Your Converter System
If you haven’t already done so, plug
in and turn on your computer. The
green indicator labeled LOCK on the
Converter’s front panel should light,
showing that the Converter is
receiving a proper signal from the
computer. (Refer to the next chapter
for an explanation of this indicator.)
Make sure the FREEZE IMAGE
switch on the front panel is in the
NORMAL position, so that your
computer-image sequences will
flow smoothly.
Your Video Converter Pro for Mac
is now ready for normal operation.
Operating your Video Converter Pro
for Mac is very simple. There are few
controls to adjust and no hidden
DIP switches to set. Figure 4-1, below,
shows the front panel with its switches
and indicators.
OUTPUTS NTSC PAL
VIDEO OUTS-VIDEO VIDEORGB/EXPANSION VIDEO IN POWER
Figure 3-1. Rear panel of a Video Converter Pro for Mac.
NOTE: All outputs are available at the same time. Unused outputs
do not have to be terminated if they are not being used.
Highest quality RGBS
at 15.75 kHz (also
future expansion)
S-Video for separate,
clearer Y/C video signals
Baseband video signal
for standard video
equipment
NTSC/PAL switch for
selecting the appropriate
video standard
Buffered Macintosh
video signal for
local Mac monitor
Macintosh video
signal input from
computer
Power supply
(line cord from
transformer plugs
in here)
8
CHAPTER 4: Operation
4.1 Indicators
The red POWER indicator lights
up when your Converter is receiving
DC power. If this light is glowing
dimly or not at all, there might be
something wrong with the external
power supply. See Chapter 6.
The green LOCK indicator lights
up when the Converter is receiving
a valid computer signal through the
VIDEO IN connector on its rear
panel. Both the 512 x 384 and
640 x 480 Macintosh®video-display
modes are supported. Which one
the Converter will use depends on
the monitor attached to the VIDEO
OUT port (see Section 4.3).
4.2 Front-Panel Controls
UNDERSCAN: When this switch is in
the NORMAL position, images that
the Coverter outputs in Composite,
S-Video, and RGBS formats will fill
the entire viewable screen area. But
because some monitors “overscan”
their screens, some desirable parts of
your images could be cropped off of
the screen. If this is the case, flip this
switch to the UNDERSCAN position
to shrink the images, both
horizontally and vertically,
approximately 10% in size.
4. Operation
Figure 4-1. Front panel of a Video Converter Pro for Mac.
LOCK UNDERSCAN FLICKER REDUCTION FREEZE IMAGE
NORMALNORMALNORMALPOWER
Receiving power
when POWER is
lit. Mac signal is
OK at input
when LOCK is lit
Image is “shrunk” in both
the horizontal and vertical
directions when switch is in
UNDERSCAN position
Anti-flicker filter is
active when switch is in
FLICKER REDUCTION
position
Image is instantly
“frozen” when switch is
in FREEZE IMAGE
position
9
VIDEO CONVERTER PRO FOR MAC
FLICKER REDUCTION: When
this switch is in the NORMAL
position, the Converter sends images
using fully interlaced Composite,
S-Video, and RGBS video signals.
However, thin horizontal lines in
the images might appear to “flicker”
on and off at a very fast rate. This
annoying flicker, if present, can be
virtually eliminated by setting this
switch to the FLICKER REDUCTION
position. There is a tradeoff with
this feature: you might notice a
slight loss of vertical resolution,
detail, or brightness.
FREEZE IMAGE: You might
want to freeze a frame of an image
sequence on the screen without
having to mess around with your
software. If this switch is moved to
the FREEZE IMAGE position, the
image on the Composite, S-Video,
and RGBS outputs is frozen. It will
remain frozen until you move the
switch back to the NORMAL
position, at which time whatever
image is currently being received
through VIDEO IN will be displayed.
4.3 Other Features
• If the computer input signal is
no longer present on VIDEO IN
because the computer has been
turned off or the input cable has
been disconnected, the image
will automatically “freeze” and
the LOCK indicator will go off.
• The VIDEO OUT output will
always display what is present on
the VIDEO IN input regardless
of the “display mode” the
computer may be in. If VIDEO
IN is at 1024 x 768 resolution,
VIDEO OUT will also be
1024 x 768. This is not true of the
Composite, S-Video, and RGBS
outputs: images in Macintosh
modes beyond 640 x 480 lines
will appear scrambled and out
of sync when translated into
these formats.
• The Converter supports both
the low-res 512 x 384 and hi-res
640 x 480 Mac modes. Some Mac
models will boot in one mode or
the other depending on the type
of monitor they are connected
to. The Converter makes use
of this capability: if a low-res
monitor is connected to its
VIDEO OUT output, it will
force the Macintosh to boot in
512 x 384 mode, but if a hi-res
monitor (or no monitor) is
connected, it will force 640 x 480.
Indice
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