Black Box AC076A Manuel utilisateur

CUSTOMER

SUPPORT

INFORMATION

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FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746

Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: www.blackbox.com • E-mail: [email protected]

AUGUST 2000

AC076A

Video Converter Pro for Mac

UNDERSCAN

NORMAL

FL ICKER REDUCTION

NORMAL

FREEZE IMAGE

NORMAL

POWER

LOCK

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

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

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

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

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

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)

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

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.

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