Ensemble Designs BrightEye 2 User Manual

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

Pb In

BrightEye 2 Functional Block Diagram

BrightEye 2 Feeding a Digital Production Switcher

Pr, C In

Cpst, Y In

12-bit
Video A-D
Converter

and

Decoder

Front Panel or BrightEye PC

Controls

Processing

Gain Adjust

Source

Select

Controls

Proc
Amp

SDI Out

Serializer

VTR

Digital Production

BrightEye 2

Pb In

Pr In

Y In

SDI Out

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 applica­tion 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 indi­cators and control over video input selection and gain.

Status Indicators

The following status indicators are provided on the front panel:

In

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: