Feasa ICT Series Manual de usuario

FEASA LED ANALYSER

ICT VERSION

User Manual for Feasa ICT Models

Feasa Enterprises Ltd,

Holland Road,

National Technology Park,

Castletroy, Limerick, Ireland.

www. easa.ie

Email: sales@ easa.ie

Rev. 7.5 ICT Version

Date: May 2019

FEASA LED ANALYSER

ICT VERSION

About this Manual

Feasa operates a policy o continuous development. Feasa reserves the right to make changes

and improvements to any o the products described in this document without prior notice.

Feasa reserves the right to revise this document or withdraw it at any time without prior

notice.

This manual is written or the Feasa In Circuit Test (ICT) Led Analysers. The model numbers

are Feasa x-I and the Feasa x-IB (where x is the no. o ibers either 2, 3, 5, 6, 10, 20).

The Feasa 20-I is a standard 20 channel unit which will test up to 20 LEDs while the Feasa 3-I

is a standard 3 channel unit testing up to 3 LED's.

The Feasa 20-IB is a High Brightness 20 channel unit which will test up to 20 LEDs while the

Feasa 3-IB is a 3 channel High Brightness unit testing up to 3 LED's.

The inter ace on these units is RS232-Serial or ICT Inter ace (Frequency Mode / Synchronous

Serial Mode).

manual may be reproduced or retransmitted in any form or means, electronic or

mechanical, including photocopying, recording, or any other storage and retrieval

system without prior permission in writing from Feasa Enterprises Ltd. Every effort

has been made to ensure that the information in this manual is accurate. Feasa

Enterprises Limited is not responsible for printing or clerical errors.

FEASA LED ANALYSER
ICT VERSION 
Table of Contents
Introduction..........................................................................................................................................6
IMPORTANT INFORMATION for Programmers...............................................................................7
Colour and Saturation...........................................................................................................................8
Intensit ..............................................................................................................................................10
White LED's.......................................................................................................................................12
Setting Tolerance Limits for Colour and Intensit .............................................................................13
Ph sical La out..................................................................................................................................14
In-Circuit Test Mode...........................................................................................................................15
Frequenc  Out Port Protocol.....................................................................................................16
ICT Connector Pin-out..............................................................................................................17
ICT Connector Pin Descriptions...............................................................................................18
ICT Logic Levels & C cle Times.............................................................................................19
Hue and Saturation Frequencies................................................................................................20
Hue and Saturation Responses..................................................................................................21
In-Circuit Test Frequenc  Mode.........................................................................................................22
Initialize the LED Anal ser for Capture...................................................................................24
Set the Sensitivit  Level of the Anal ser (setfactor).................................................................25
Capture LED Data (HSI or WSI or x I) non PWM LED's.......................................................26
Capture LED Data (HSI or WSI or x I) PWM LED's..............................................................27
Test LED Data (HSI or WSI or x I).........................................................................................28
Step-b  Step Sequence for LED Anal ser Auto Capture & Read HSI or WSI or x I..............29
Capture Times ICT Mode – non PWM Leds............................................................................31
In Circuit Test S nchronous Serial Mode...........................................................................................32
S nchronous Serial Pin Descriptions........................................................................................33
S nchronous Serial Commands................................................................................................34
Clear Comms Buffer.................................................................................................................35
Initialize the LED Anal ser.......................................................................................................36
Set the Sensitivit  Factor (setfactor).........................................................................................37
Capture for non-PWM LED's...................................................................................................38
Step-b  Step Sequence for LED Anal ser Capture non-PWM LED's......................................40
Capture Times S nchronous Mode – non PWM Leds..............................................................41
Capture for PWM LED's...........................................................................................................42
Step-b -Step Sequence for LED Anal ser Capture for PWM LED's.......................................43
Capture Times S nchronous Mode – PWM Leds.....................................................................44
Read Hue, Saturation and Intensit  (HSI)................................................................................45
Read RGB and Intensit  (RGBI)..............................................................................................47
Dominant Wavelength (W).......................................................................................................49
Wavelength & Saturation & Intensit  (WSI)............................................................................51
colour Temperature (cct)...........................................................................................................53
x- chromaticit ,  -chromaticit  & Intensit  (x i).....................................................................55
Absolute Intensit .....................................................................................................................57
Serial Port Control (RS232)...............................................................................................................59
Capture Commands........................................................................................................................60
AUTO CAPTURE - Store LED Data.......................................................................................61
MANUAL CAPTURE# - Store LED Data for a specific range...............................................62
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FEASA LED ANALYSER
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AUTO CAPTUREPWM - Capture PWM LED Data...............................................................63
MANUAL CAPTURE - Capture PWM LED Data for a specific range..................................64
CAPTUREMULTI - Multiple Capture Command....................................................................65
Get Data Commands......................................................................................................................66
Under Range Condition.................................................................................................................66
Over Range Condition...................................................................................................................66
Incorrect Capture Mode.................................................................................................................66
getRGBI## - Get RGB and Intensit  for a LED.......................................................................67
getHSI## - Get Hue, Saturation and Intensit ..........................................................................68
getx ## - Return the x  Chromaticit  values...........................................................................69
getx i## - Return the x  Chromaticit  & Relative Intensit  values.........................................70
getXOFFSET## - Return the x Chromaticit  offset.................................................................71
getYOFFSET## - Return the   Chromaticit  offset.................................................................72
getUV##    - Return the u'v' Chromaticity values........................................................................73
getWAVELENGTH##    - Get the Dominant Wavelength...........................................................74
getWAVELENGTHOFFSET@@ - Get the Dominant Wavelength Offset..............................75
getWI## - Get the Dominant Wavelength & Intensit ..............................................................76
getWSI## - Get the Dominant Wavelength, Saturation & Intensit .........................................77
getCCT## - Get the Correlated Colour Temperature................................................................78
getINTENSITY## - Get the Intensit .......................................................................................79
getINTGAIN## - Get the Intensit  Gain Factor.......................................................................80
getFACTOR - Get the exposure Factor.....................................................................................81
get7SEG# - Get the value of a 7 Segment Displa ...................................................................82
getABSINT@@ - Get the Absolute Intensit  Value of the Led under test...............................83
getAUTOPWM - Get which Auto Capture Mode is active C or CPWM.................................84
General Commands............................................................................................................................85
General Set Commands.................................................................................................................85
set/putFACTOR## - Set the Exposure Factor...........................................................................86
set/putLOG - Change the Intensit  Response of the Anal ser to Logarithmic mode...............87
set/putLIN - Change the Intensit  response of the Anal ser to Linear Mode...........................88
set/putINTGAIN - Set the Intensit  GainFactor.......................................................................89
set/putXOFFSET##0.xxx - Set the x Chromaticit  Offset.......................................................90
set/putYOFFSET##0.xxx - Set the x Chromaticit  Offset.......................................................91
set/putWAVELENGTHOFFSET@@±## - Set the wavelength Offset....................................92
setBAUD - Change the baud rate..............................................................................................93
setAUTOPWM# - Change the Auto Capture mode to Auto PWM Mode................................94
setFREQUENCYxxx - Set the Frequenc  Output Mode of the Anal ser................................95
General Get Commands.................................................................................................................96
getSERIAL Get the Serial Number of the Anal ser.................................................................96
getVERSION - Get the Firmware Version................................................................................97
getBAUD - Get the Baud Rate..................................................................................................98
getHW - Get the Hardware Version..........................................................................................99
getSTATUS - Get a summar  of the Led Anal ser details......................................................100
getICTSTATUS - Get the Led Anal ser ICT Mode details....................................................101
EOT - End of Transmission Character....................................................................................102
 User Calibration Mode....................................................................................................................103
Introduction:............................................................................................................................103
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FEASA LED ANALYSER
ICT VERSION 
setcalibration# - Select the user cal setting.............................................................................104
ResetUserCal - Reset the usercal setting to factor  default....................................................105
SetCalibrationDateddmm  - Set the user Cal Date...........................................................106
getcalibrationdate Get the Calibration Date set b  the user....................................................107
External Capture Mode.....................................................................................................................108
Sequence Capture Mode:..................................................................................................................110
Introduction.............................................................................................................................110
Set/Put SequenceMode# - Set sequence mode for Fibers.......................................................111
Set/Put SequenceChannel@@ - Select sequence mode Fiber No..........................................112
Set/Put SequenceCapture##(#) - Set Sequence Capture Time................................................113
Set/Put SequenceWait##(#) - Set Sequence Wait Time..........................................................114
Set/Put SequenceNumber###(#) - Set the Number of Captures.............................................115
Set/Put SequenceThreshold##### - Set the Intensit  Threshold............................................116
Set/Put SequenceStartDela ### - Set dela  in ms before sequencecapture starts..................117
CaptureSequence - Start the Captures.....................................................................................118
StoreSequence## - Store the sequence pattern........................................................................119
Identif Sequence - Identif  the current sequence pattern.......................................................120
ResetSequence## - Reset a sequence pattern..........................................................................121
ResetSequenceAll - Reset all sequence patterns.....................................................................122
GetSequenceStored## - Get a sequence pattern......................................................................123
GetSequence@@ - Get the binar  sequence of Intensities.....................................................124
GetSequenceTimes@@ - Get the Dut  C cle of the Sequence..............................................125
GetSequenceTimesAll - Get the Dut  C cle of the Sequence for all fibers...........................126
GetFrequenc ## - Returns the frequenc  and dut  c cle of Led............................................127
GetMax(Min)Intensit ## - Returns the Max or Min Intensit  for the Seq Cap.....................128
GetFlicker## - Returns the Flicker Index and frequenc  after a Seq Cap..............................129
GetSequenceMode# - Get sequence mode for Fibers.............................................................130
GetSequenceChannel## - Select sequence mode Fiber No....................................................131
GetSequenceCapture - Get Sequence Capture Time...............................................................132
GetSequenceWait - Get Sequence Wait Time.........................................................................133
GetSequenceNumber - Get the Number of Captures..............................................................134
GetSequenceThreshold - Get the Intensit  Threshold............................................................135
GetSequenceStartDela  - Get the dela  before the CS command..........................................136
Capture Sequence S nc Serial Commands.............................................................................137
Step-b -Step approach to Testing a LED.........................................................................................138
Effect of PWM on Intensit  Testing.................................................................................................139
Step-b -Step approach to Testing a PWM LED...............................................................................140
Testing a 7-Segment Displa ............................................................................................................141
Command Summar :........................................................................................................................142
Specifications...................................................................................................................................144
Warrant ...........................................................................................................................................145
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FEASA LED ANALYSER

ICT VERSION

Introduction

The Feasa LED Analyser is an instrument that tests the HSI (Hue, Saturation, Intensity),

RGB (Red, Green, Blue Colour content), xyChromaticity, Dominant Wavelength and cct colour

temperature o Light Emitting Diodes (LEDs) in a test process. An individual Led Analyser can

have up to 20* lexible Fiber-Optic Light Guides which are mounted individually over the LEDs

to be tested.

Emitted Light rom the LEDs is guided through these Fiber-Optic Light Guides to the Analyser

where the raw data is stored. The raw data can then be read out o the Led Analyser through

the Serial or ICT Inter aces.

The ICT Inter ace is a 20-Pin Connector compatible with In-Circuit Test machines. There is a

choice o two operating modes using the ICT Inter ace. The irst mode uses requencies to

output the LED data and the second mode uses a high-speed Synchronous Serial Bus to output

the Led data.

The Serial Inter ace is a 3-Pin Connector with a 3 pin to 9 pin dtype cable (supplied)

compatible with the RS232 port on machines.

All Colours are derived rom the three primary colours, Red, Green and Blue (RGB). The RGB

values are used to identi y di erent colour LEDs.

The raw data rom the Led under test is stored on the Led Analyser and output in di erent

ormats as required through the Serial and ICT inter aces.

* Other options include 2,3,5,6,10.

Back to Index

FEASA LED ANALYSER

ICT VERSION

IMPORTANT INFORMATION for Programmers

set / put Commands

The Set / Put commands are used to adjust various settings in the LED Analyser such as

Intensity, Exposure and o sets.

The Set commands are written to the on-board Flash.

These settings remain programmed in the Analyser even when the power is removed.

The Led Analyser has a capacity limit o approximately 100,000 writes to the lash.

Use the Set command only to store relevant in ormation on the Led Analyser. Please re rain

rom using Set commands in your high volume production programs as this constant writing to

the Flash will eventually corrupt the Led Analyser. Use the Put command instead.

The Put commands are written to the on-board RAM.

These settings will NOT remain programmed in the Analyser a ter the power is removed.

Use the Put command as o ten as you need in your program. This will prolong the li e o the

Led Analyser particularly in high volume testing environment.

Commands are transmitted and received using ASCII characters and are case-insensitive.

All commands must be terminated with a <CR> or <LF> character.

Back to Index

FEASA LED ANALYSER

ICT VERSION

Colour and Saturation

Figure 1: Hue (colour) Wheel

RED = 0º

GREEN = 120º

BLUE = 240º

Colours can represented by a 360° degree circular Colour wheel. The three Primary RGB values

can also be represented as a single value called Hue.

Hue is a measured location on a Colour wheel and is expressed in degrees.

For example, Red will have a Hue value near 0°, Green will have a Hue value near 120° and

Blue will have a value near 240°.

A pure Colour will be represented on the Colour wheel as a point near the outer edge. White

will be represented by a point near the center o the wheel. The degree o whiteness in a LED

will a ect its position on the wheel – the greater the amount o white the closer it will be to the

center.

The degree o whiteness emitted by the LED is represented by the term Sa ura ion. A

Saturation value o 0% represents pure White. A Saturation value o 100% represents a pure

Colour such as Red, Blue, Green, etc.

Usually the user must determine the Hue and Saturation values by testing a number o LED's

and recording the results.

Back to Index

FEASA LED ANALYSER

ICT VERSION

The RGB and Hue values in Figure 2 show how di erent Colour LEDs can be identi ied.

LED R G B HUE SATURATION

Red 253 1 1 0 100%

Green 24 208 23 120 89%

Blue 2 13 240 238 99%

Yellow 76 171 8 95 96%

Orange 224 28 2 7 99%

White 71 72 112 See Page 8 37%

Figure 2.

The RGB or Hue values are used to identi y di erent Colour LEDs.

Every LED tested by the LED Analyser will have a set o RGB values generated or analysis.

These values are converted automatically to Hue and Saturation (whiteness) and can be read

out through the Serial or ICT ports.

Back to Index

FEASA LED ANALYSER

ICT VERSION

Intensity

Intensity is a measure o the amount o light being emitted by the LED. The Analyser tests the

Intensity o each LED and outputs this value to the Test System. The value is output as a

number in the range 0-99,999. The Analyser is calibrated to a ixed standard and all

measurements are relative. The Intensity output reading is NOT part o the International

System of nits and is not an absolute or traceable unit o colour measurement. It is part o

the Hue Saturation and Relative intensity (HSI) system o describing colour.

The Analyser can be set in either Linear mode or Logarithmic modes to measure Intensity o

the LED. The units are shipped rom the actory in Logarithmic mode. See setlog and setlin

commands to determine how to set the mode o the analyser. Use the get status command to

determine which intensity measure mode the Analyser is set to

Factors that in luence Intensity Measurement:

The position o the Fiber in relation to the LED.

O set rom the Optical Centre o the LED.

The Gap between the end o the Fiber Light Guide and LED to be measured.

The condition o the Fiber end. It must be kept clean with a 90º Cleave.

Is the LED Static or Flashing ?

External In luences – Other LEDs in close proximity, Ambient Lighting.

Is an Optical Head being used.

There are 6 cap ure ranges each wi h an in ensi y ou pu range of 0 o 99,999. Feasa

recommends ha he UUT readings should be in he 55K o 85K range for he bes

s abili y.

Figure 3a. In ensi y for he LED Analyser in LOGARITHMIC Mode

Back to Index

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