Ensemble Designs BrightEye 2 Manuale utente

This user guide provides detailed information for using the BrightEye™2

Analog to Digital Converter.

The information in this user guide is organized into the following sections:

• Product Overview

• Functional Description

• Applications

• Rear Connections

• Operation

• Front Panel Controls and Indicators

• Using The BrightEye Control Application

• Warranty and Factory Service

• Specifications

• Glossary

BrightEye-1

Analog to Digital

Converter

User Guide

Revision 5 SW v1.0.7

ENSEMBLE

DESIGNS

BrightEye 2 Analog to Digital Converter

PRODUCT OVERVIEW

The BrightEye 2 Converter is a self-contained unit that provides uncompromised

analog to digital conversion of component and composite video. Analog inputs are

digitized at 12 bits of resolution with 4x oversampling. Composite video is

processed through an adaptive comb filter decoder. PAL and NTSC input

detection is automatic. Signal I/O and power is supplied to the rear of the unit. It

is powered by a modular style power supply.

Supporting both Beta and SMPTE component, composite and Y/C formats,

BrightEye 2 adapts to many conversion needs. Use BrightEye 2 to digitize analog

VTR and camera outputs for example.

Front panel controls permit the user to monitor input status, select input type,

and adjust video gain. Control and monitoring can also be done using the

BrightEye Control application from a personal computer with USB support.

A glossary of commonly used video terms is provided at the end of this guide.

FUNCTIONAL DESCRIPTION

The BrightEye 2 converter can perform analog to digital conversion on a variety

of television signal formats, in both the 525/60Hz (NTSC) and 625/50Hz (PAL)

line standards. The converter supports the NTSC and PAL composite standards,

Y/C, and color difference analog component formats.

Analog composite video is fed to the converter on a single BNC connector at 1 volt

p-p levels (sync tip to peak white). The analog signal is clamped (DC restored)

and digitized. This digital representation of the original signal is decoded into

luminance and color difference component form using an adaptive comb filter.

Component video inputs in the SMPTE or Beta formats of Luminance (Y), and

color difference (R-Y or Pr, and B-Y or Pb) enter the converter through three BNC

connectors. They are digitized and clamped and then gain-scaled to component

digital levels.

In all cases of analog video input, the resultant digital signal conforms to the

ITU-R 601 standard. This is a 4:2:2 component digital signal with a 27 MHz

sampling rate. The overall amplitude of the signal can be adjusted with the gain

control.

The output is serialized as a 270 Mb/s bitstream and feeds the electrical SDI BNC

output connector.

BrightEye 2 is powered by a 12 volt DC universal power supply. This power

supply can accept an input voltage between 90 and 230 volts, at 50 or 60 Hz.

It uses a standard IEC line cord and can be used anywhere in the world. It is

normal for the converter to be quite warm to the touch when operating.

BrightEye-2

APPLICATIONS

BrightEye 2 is ideal for situations requiring analog to SDI video conversion. In

the example shown below, the output of a component analog VTR is fed to the

input of a digital production switcher.

BrightEye-3

12-bit

Video A-D

Converter

and

Decoder

SDI Out

Cpst, Y In

Pr, C In

Pb In

Source

Select

Gain Adjust

Front Panel or BrightEye PC

Controls

Serializer

Processing

Controls

Proc

Amp

BrightEye 2 Functional Block Diagram

BrightEye 2

VTR

Digital Production

Switcher

SDI Out

Pr In

Pb In

Y In

BrightEye 2 Feeding a Digital Production Switcher

BrightEye 2 Analog to Digital Converter

REAR CONNECTORS

All connections to the BrightEye 2 converter are made on the rear of the unit.

Refer to the illustration below.

Power Connection

Connect a modular power supply to the 12 volt DC power input connection on the

far left. Use the locking ring to secure it.

USB Connector

The USB connector is used to provide more comprehensive control, diagnostics,

and upgrades to the unit from a PC or Mac. Use the BrightEye Control applica-

tion included on CD-ROM to make adjustments as described in the OPERATION

section of this user guide.

Input/Output BNCS

There are four rear BNC connectors which are used as follows:

SDI Out

The Serial Digital Component output of the converter is presented on this

connector. This output conforms to the ITU-R 601 standard for serial digital

video, with SMPTE 259M serialization at 270 Mb/s.

Pb In

This is the internally terminated 75 ohm input for the following format signals:

• Beta or SMPTE – Pb input

Pr, C In

This is the internally terminated 75 ohm input for the following format signals:

• Beta or SMPTE – Pr input

• S-Video (composite) – C input

Cpst, Y In

This is the internally terminated, 75 ohm input for one of the following signal

formats:

• Composite (Cpst) – composite input

• S-Video (composite) – Y input

• Beta or SMPTE – Y input

BrightEye-4

BrightEye 2 Rear Connectors

OPERATION

Control and operation of the BrightEye 2 converter is performed from the front

panel or with the BrightEye Control application.

Some control settings are only available with BrightEye PC or Mac. These parameters

cannot be monitored or controlled with the front panel.

Front Panel Controls and Indicators

The front panel of the converter, shown in the figure below, provides status indi-

cators and control over video input selection and gain.

Status Indicators

The following status indicators are provided on the front panel:

Illuminates green when an input for the currently selected video format is

detected on the input connector. This indicator does not light when either of the

two internally generated test patterns are selected.

Source Select

The currently selected video input will illuminate green.

Gain

Illuminates green when gain is set to unity or red when gain is other than unity.

Pwr (Power)

Illuminates green when power is applied to the converter and the internal voltage

regulator is functioning correctly.

ADJUSTING PARAMETERS FROM THE FRONT PANEL

Use the Mode, Right Arrow, and Left Arrow buttons to select and adjust

parameters from the front panel.

Pressing the Mode button activates the front panel for editing and tabs between

each section of editable parameters.

Pressing the Right Arrow or Left Arrow advances the selection within a given

section of parameters, or increases (Right Arrow) or decreases (Left Arrow) the

value of a selected parameter.

BrightEye-5

BrightEye Front Panel

NOTE:

BrightEye 2 Analog to Digital Converter

BrightEye-6

The LED of an edited parameter will blink for 15 seconds, after which time its value is

stored in memory. If power is interrupted before this 15 second timeout period has

elapsed, the edited state will not be not saved.

The controls and their indicators are described below:

Source Select Mode

This control selects the video input source format with the following choices:

Cpst – Analog Composite Video

Y/C – S-Video Composite Video

Beta – Component Video in Beta format

SMPTE – Component Video in SMPTE format

The green indicator under the selected source will be illuminated.

Gain Mode

This control adjusts the overall gain of the analog video signals passing through

the converter. The right arrow will increase the gain, the left arrow will decrease

it. The indicator will illuminate green when the gain is set to its nominal or unity

setting.

This is the setting which will produce correct digital output levels from an analog

input source which itself is at proper level. The indicator will show red whenever

the control is adjusted either higher or lower than the nominal setting. The gain

can be reset to nominal (green) by pressing both arrows simultaneously.

NOTE:

BrightEye-7

USING THE BRIGHTEYE CONTROL APPLICATION

The BrightEye PC and BrightEye Mac applications included on CD-ROM are

designed to allow you to configure and control the BrightEye 2 from a personal

computer. Installation and instructions for using this software application are

given in the PDF manual on disk.

If the BrightEye 2 is connected to a computer running this software, the following

menus are available for controlling and monitoring the unit.

Input Menu

• Input – select the type of input signal to the unit from the Input pulldown

as Composite,Y/C, Beta, or SMPTE.

• Setup Removal – use this control to indicate the presence of setup on the

input (in 525 mode only, grayed out in 625). Select On for setup removal or

Off for no setup removal.

• Comb Mode – set this control for the type of comb filtering desired from

3 Line or 5 Line.

The following status items are also reported for the unit:

• Input Pres – reports the presence and detected line rate of the video input.

BrightEye 2 Analog to Digital Converter

BrightEye-8

Proc Menu

A video processing amplifier allows the adjustment of parameters for the analog

input signal.

The Proc menu provides the following video processing controls:

• Gain – adjusts the overall gain of the analog video signals passing through

the converter from 50 to 150%. The front panel indicator will light green

when the gain is set to its nominal or unity setting.

This is the setting which will produce correct digital output levels from an

analog input source which itself is at proper level. The indicator will show

red whenever the control is adjusted either higher or lower than the

nominal setting.

• Chroma – adjusts the percentage of chroma from 50 to 150%. There is no

front panel control or indication of this setting.

• Pedestal – adjusts the pedestal level of the signal +/- 5 IRE. There is no

front panel control or indication of this setting.

•Hue– adjust the amount of hue +/- 90 degrees in 525 mode only. There is

no front panel control or indication of this setting.

All values can be reset to nominal by selecting the Default button next to

the control.

Trims Menu

The Trim menu provides the adjustments below for the component Cr and Cb

input video input gain and DC offsets to compensate for incorrect levels on the

input sources:

• Cr Gain – adjusts the input gain of the Cr channel video (± 30).

• Cb Gain – adjusts the input gain of the Cr channel video (± 30).

• Cr Offset – adjusts the DC offset of the Cr channel.

• Cb Offset – adjusts the DC offset of the Cb channel.

BrightEye-9

BrightEye 2 Analog to Digital Converter

BrightEye-10

WARRANTY AND FACTORY SERVICE

Warranty

Ensemble Designs, Inc. warrants this product to be free from defect in material

and workmanship for a period of five years from the date of delivery. During this

two year warranty period, Ensemble Designs, Inc. will repair any defective units

at Ensemble’s expense if the unit should be determined to be defective after con-

sultation with a factory technician.

This warranty is not transferable. Any implied warranties expire at the expira-

tion date of this warranty.

This warranty does not cover a defect that has resulted from improper or unrea-

sonable use or maintenance as determined by us. This warranty is void if there is

any attempt to disassemble or adjust factory set presets without factory autho-

rization.

Factory Service

If you require service (under warranty or not), please contact Ensemble Designs

and ask for Customer Service before you return the unit. This will allow the

service technician to provide any other suggestions for identifying the problem

and recommend possible solutions.

You may also refer to the technical support section of the Ensemble web site for

the latest information on your equipment at the URL below:

http://www.ensembledesigns.com/support

If you return equipment for repair, please get a Return Material Authorization

Number (RMA) from the factory first.

Ship the product and a written description of the problem to:

Ensemble Designs, Inc.

Attention: Customer Service RMA #####

870 Gold Flat Rd.

Nevada City, CA 95959 USA

(530) 478-1830

Fax: (530) 478-1832

[email protected]

http://www.ensembledesigns.com

Be sure to put your RMA number on the outside of the box.

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