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- Page 1 FEASA 2-I/3-I LED ANALYSERS User Manual Feasa Enterprises Ltd, Holland Road, National Technology Park, Castletroy, Co.Limerick, Ireland. www.feasa.ie Email: sales@feasa.ie Rev. 1.6 Date: June, 2009...
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Page 2: About This Manual
This Manual is applicable to the Feasa 2-I and Feasa 3-I Led Analysers. The Feasa 2-I tests up to two LED's and the Feasa 3-I tests up to three LED's. Any reference in this Manual to Fiber 3 is only applicable to the Feasa 3-I Analyser. -
Page 3: Table Of Contents
FEASA 2-I/3-I LED ANALYSERS Table of Contents Introduction............................5 Colour..............................6 Intensity..............................8 White LED's............................9 Block Diagram............................10 Physical Layout of LED Analyser Board....................11 Serial Port Control..........................12 ICT Port Control..........................13 InCircuit Test Mode...........................14 Output Frequency Protocol.........................14 InCircuit Test Mode...........................15 Color and Saturation Frequencies....................15 ICT Connector Pin Description......................16 Intensity Range Selector Switch....................18 Under Range Condition........................19 Over Range Condition........................19 Busy Condition..........................19 Hue and Saturation Responses ....................20 Testing PWM LED's........................21 Unused Fibers.............................22 PWM vs Intensity..........................23 Serial Communications........................24 Software Commands...........................25 Capture Commands..........................26 CAPTURE Capture LED Color and Intensity Data..............27 CAPTURE# Capture LED Color and Intensity Data..............28 CAPTUREPWM Capture PWM LED Color and Intensity............29 CAPTUREPWM## Capture PWM LED Color and Intensity.............30 Get Data Commands...........................31 getRGBI# Get RGB and Intensity for a LED................32 getHSI# Get Hue, Saturation and Intensity.................33 getXY# Return the XY Chromaticity values................34 getINTENSITY# Get the Intensity....................35 getIntGain Get the Intensity Gain Factor..................36 getRANGES Get the Selector Switch Ranges................37... - Page 4 FEASA 2-I/3-I LED ANALYSERS Set Commands............................39 SetIntGain Set the Intensity GainFactor..................40 SetUserTime Set the Capture exposure time................41 setXoffset#0.xxx Set the X Chromaticity Offset.................42 setYoffset#0.xxx Set the Y Chromaticity Offset.................43 General Commands..........................44 getSerial Get the Serial Number of the Analyser................44 getVersion Get the Firmware Revision..................45 getHW Get the Hardware Version....................46 Setbaudrate Change the baud rate....................47 Installing the LED Analyser in a Test Fixture..................48 Testing LED's.............................49 Test Sequence using the ICT Port.......................50 Command Summary...........................51...
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Page 5: Introduction
FEASA 2-I/3-I LED ANALYSERS Introduction The Feasa 3 Channel LED Analyser is a module used in a test process to test the Colour, Saturation(whiteness) and Intensity of Light Emitting Diodes (LEDs). Light from the LEDs is guided through flexible Fiber-Optic Light Guides to the Analyser where the Colour, Saturation and Intensity are tested. -
Page 6: Colour
FEASA 2-I/3-I LED ANALYSERS Colour Figure 1: Hue (Colour) Wheel 0° GREEN 120° BLUE 240° 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. - Page 7 FEASA 2-I/3-I LED ANALYSERS The RGB and Hue values in Figure 2 show how different Colour LEDs can be identified. SATURATION 100% Green Blue Yellow Orange White Figure 2 The RGB or Hue values are used to identify different Colour LEDs.
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Page 8: Intensity
FEASA 2-I/3-I LED ANALYSERS Intensity The Feasa 3 Channel Analyzer measures the intensity of LED light in relative units of luminous intensity. This means that Intensity will have a value between 1,000 and 100,000. The Analyzer outputs measured intensity through the ICT port as a square wave with frequency in the range 1kHz to 100kHz. -
Page 9: White Led's
FEASA 2-I/3-I LED ANALYSERS White LED's White LED's must be treated differently to Coloured LED's when being tested. White is not a Colour – it is a mix of all other Colours. The three Primary Colours Red, Green and Blue will be mixed in approximately equal proportions to display a White Colour. -
Page 10: Block Diagram
FEASA 2-I/3-I LED ANALYSERS Block Diagram Color or Saturation LED 1 Fiber 1 Frequency Sensor Intensity Generator Color or Saturation LED 2 Fiber 2 Frequency Sensor Intensity Generator Color or Saturation LED 3 Fiber 3 Frequency Sensor Intensity Generator Serial Color or Saturation... -
Page 11: Physical Layout Of Led Analyser Board
FEASA 2-I/3-I LED ANALYSERS Physical Layout of LED Analyser Board Range Select Serial Figure 7: Physical Layout of LED Analyser Board The above diagram identifies the location of the following:- • ICT (J1) and Serial (J2) Interface Connectors. • Range Selection Switch. -
Page 12: Serial Port Control
FEASA 2-I/3-I LED ANALYSERS Serial Port Control For serial communications the LED Analyser must be connected from the 3-pin Header J2 to the PC or Controller using the supplied Serial Cable. Power must be supplied on J2 with 5V DC and the Green LED beside the Power header should turn on. -
Page 13: Ict Port Control
FEASA 2-I/3-I LED ANALYSERS ICT Port Control This Port has been designed to be used by In-Circuit Test Machines such as the Agilent 307X Series, Teradyne/Genrad 228X Series, etc. The protocol used on this Port uses the Frequency of a Square Wave to indicate the Colour, Saturation and Intensity of LED's. -
Page 14: In-Circuit Test Mode
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode Output Frequency Protocol The ICT Port outputs Color, Saturation and Intensity of LED's using a square wave signal. The frequency of the square wave signal from the Led Analyser represents the Colour or Saturation and the Intensity of the LED being tested. -
Page 15: In-Circuit Test Mode
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode Color and Saturation Frequencies A list of typical Colour and Saturation frequencies for different LED's is shown in Figure 10. These values can be used initially to set up test limits in a Test Program. -
Page 16: Ict Connector Pin Description
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode ICT Connector Pin Description Power and GND The Analyser requires 5VDC @ 100mA power to operate. Saturation Input This input is used to select between generating Colour frequency or Saturation frequency on the output pins 4, 6, and 8 simultaneously. -
Page 17: Capture Input
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode Capture Input This input must be driven low for 5mSec and then driven high. The Analyser will read the Color and Intensity data of the LED's selected by the Selector Switch. The output frequencies will then be generated and can be measured at the ICT Connector. -
Page 18: Intensity Range Selector Switch
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode Intensity Range Selector Switch 10WAY SELECTOR SWITCH LED 1 LED 2 LED 3 Figure 11 The 10-way Selector Switch used to program the LED Analyser with different settings is shown in Figure 11. Each sensor has three switches associated with it allowing six possible range settings. The switch settings are shown in Figure 12. -
Page 19: Under Range Condition
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode Under Range Condition An under range condition will occur when insufficient light from the LED reaches the sensor for the range selected by the switch. This will be indicated by setting the Color frequency to 500Hz and the Intensity frequency to 500Hz. -
Page 20: Hue And Saturation Responses
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode Hue and Saturation Responses HUE vs Frequency 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 Figure 13 LED Saturation (Whiteness) Frequency 100000 80000 60000 40000 20000 1000 Pure White Pure Colour Figure 14 Back to Index... -
Page 21: Testing Pwm Led's
FEASA 2-I/3-I LED ANALYSERS In-Circuit Test Mode Testing PWM LED's LED's that are controlled by this method are switched on and off at various frequencies. This reduces the amount of power consumed by the LED and also allows control of the LED Intensity. Usually the frequencies used are in the range 50Hz to 150Hz. -
Page 22: Unused Fibers
FEASA 2-I/3-I LED ANALYSERS Unused Fibers If a Fiber is not being used then set the appropriate switches to 000 because this will save test time. The Analyser will output valid Colour/Saturation and Intensity frequencies when the test is completed. -
Page 23: Pwm Vs Intensity
FEASA 2-I/3-I LED ANALYSERS PWM vs Intensity PWM vs Intensity % PWM Figure 16 The effect PWM has on the tested Intensity is shown in Figure 16. This is for a LED pulsed at a frequency of 100Hz. The duty cycle of the Led is varied from 1% to 100%. -
Page 24: Serial Communications
FEASA 2-I/3-I LED ANALYSERS Serial Communications For serial communications the LED Analyser must be connected from the 3-pin Header J2 to the PC or Controller using the Serial cable. 5V DC power must be supplied on J1 and the Green LED beside the Power header should turn on. -
Page 25: Software Commands
FEASA 2-I/3-I LED ANALYSERS Software Commands There are a number of functions that can be accessed through the Serial Port. The data relating to each LED tested can be read out through the Port. An ASCII command is transmitted to the Port and the results from the command are received back from the Port. -
Page 26: Capture Commands
FEASA 2-I/3-I LED ANALYSERS Capture Commands The Capture commands are used to capture the Color and Intensity of the LED's to be tested and store the results in the memory of the Analyser. These results can be read out later using the GET DATA commands. -
Page 27: Capture Mode
FEASA 2-I/3-I LED ANALYSERS Capture Mode CAPTURE - Capture LED Color and Intensity Data Transmit Receive capture Description This command instructs the LED Analyser to read and store the Color, Saturation and Intensity of all the LED's positioned under the fibers. -
Page 28: Capture# - Capture Led Color And Intensity Data
FEASA 2-I/3-I LED ANALYSERS Capture Mode CAPTURE# - Capture LED Color and Intensity Data Transmit Receive CAPTURE# Where: # represents the ranges 1, 2, 3, 4, 5, 6. The typical capture times for each range are:- Range 1 = 600mSec... -
Page 29: Capturepwm - Capture Pwm Led Color And Intensity
FEASA 2-I/3-I LED ANALYSERS Capture Mode CAPTUREPWM - Capture PWM LED Color and Intensity Transmit Receive CAPTUREPWM Description Pulse-Width-Modulated(PWM) LED's are switched on and off rapidly to save power and to control Intensity. The Analyser automatically determines the correct settings required to execute the test. -
Page 30: Capturepwm## Capture Pwm Led Color And Intensity
FEASA 2-I/3-I LED ANALYSERS Capture Mode CAPTUREPWM## - Capture PWM LED Color and Intensity Transmit Receive CAPTUREPWM## Where: ## represents an averaging factor in the range 0 - 15. Description This command allows the User to specify an averaging factor when testing PWM LED's. -
Page 31: Get Data Commands
FEASA 2-I/3-I LED ANALYSERS Get Data Commands The get data commands are used to read out the Color, Saturation and Intensity data stored by the capture commands. The data from the last capture command remains in memory until a new capture command is issued or the power is removed from the Analyser. -
Page 32: Getrgbi# Get Rgb And Intensity For A Led
FEASA 2-I/3-I LED ANALYSERS Get Data Mode getRGBI# - Get RGB and Intensity for a LED Transmit Receive getRGBI# iiiii Where: # represents the Fiber Number and is a number 1, 2 or 3. are the red, green blue components of the LED color. -
Page 33: Gethsi# - Get Hue, Saturation And Intensity
FEASA 2-I/3-I LED ANALYSERS Get Data Mode getHSI# - Get Hue, Saturation and Intensity Transmit Receive getHSI# hhh.hh sss iiiii Where: # represents the Fiber Number and is a number in the range 1 – 3. hhh.hh represents the Hue (color) and is a number in the range 0.00 – 360.00. -
Page 34: Getxy# - Return The Xy Chromaticity Values
FEASA 2-I/3-I LED ANALYSERS Get Data Mode getXY# - Return the XY Chromaticity values Transmit Receive getXY# 0.XXXX 0.YYYY Where: represents the Fiber Number and is a number in the range 1 – 3. 0.XXXX represents the X Chromaticity value 0.YYYY represents the Y Chromaticity value... -
Page 35: Getintensity# - Get The Intensity
FEASA 2-I/3-I LED ANALYSERS Get Data Mode getINTENSITY# - Get the Intensity Transmit Receive getINTENSITY# IIIII Where: represents the Fiber Number and is a number in the range 1 – 3. IIIII represents the Intensity value. Description This command is used to get the Intensity value for the LED under the Fiber number nn. -
Page 36: Getintgain Get The Intensity Gain Factor
FEASA 2-I/3-I LED ANALYSERS Get Data Mode getIntGain - Get the Intensity Gain Factor Transmit Receive getIntGain# Where: represents the Fiber Number and is a number in the range 1 – 3. represents the Intensity gain value. Default 100. Description This command is used to get the Intensity gain value for each Fiber. -
Page 37: Getranges Get The Selector Switch Ranges
FEASA 2-I/3-I LED ANALYSERS Get Data Mode getRANGES - Get the Selector Switch Ranges Transmit Receive getRANGES XXX YYY ZZZ Where: XXX represents the range for Fiber 1. YYY represents the range for Fiber 2. ZZZ represents the range for Fiber 3. -
Page 38: Getusertime - Display The Capture Exposure Time
FEASA 2-I/3-I LED ANALYSERS Get Data Mode getUserTime - display the Capture exposure time Transmit Receive getUserTime xxxxx Where: xxxxx represents the user exposure time in mSec. Description This command displays the current capture exposure time set by the user. -
Page 39: Set Commands
FEASA 2-I/3-I LED ANALYSERS Set Commands The Set commands are used to adjust various settings in the LED Analyser such as Intensity and Exposure. These settings remain programmed in the Analyser even when the power is removed. Commands are transmitted and received using ASCII characters and are case- insensitive. -
Page 40: Setintgain - Set The Intensity Gainfactor
FEASA 2-I/3-I LED ANALYSERS Set Data Mode SetIntGain - Set the Intensity GainFactor Transmit Receive SetIntGain#xxx Where: represents the Fiber Number and is a number in the range 1 – 3. xxx represents a 3 digit gain factor, default 100. -
Page 41: Setusertime - Set The Capture Exposure Time
FEASA 2-I/3-I LED ANALYSERS Set Data Mode SetUserTime - Set the Capture exposure time Transmit Receive SetUserTime##### Where: ##### represents the capture exposure time in milliseconds. Description This command allows the user to program a capture exposure time between 1 and 10,000 milliseconds. The Selector Switch must be set to the code “110”... -
Page 42: Setxoffset#0.Xxx - Set The X Chromaticity Offset
FEASA 2-I/3-I LED ANALYSERS Set Data Mode setXoffset#0.xxx - Set the X Chromaticity Offset Transmit Receive SetXoffset#±0.xxx Where: represents the Fiber Number and is a number in the range 1 – 3. 0.xxx represents the X Chromaticity offset value (±0.000 – 0.100). -
Page 43: Setyoffset#0.Xxx - Set The Y Chromaticity Offset
FEASA 2-I/3-I LED ANALYSERS Set Data Mode setYoffset#0.xxx - Set the Y Chromaticity Offset Transmit Receive SetYoffset#±0.yyy Where: represents the Fiber Number and is a number in the range 1 – 3. 0.yyy represents the Y Chromaticity offset value (±0.000 – 0.100). -
Page 44: General Commands
FEASA 2-I/3-I LED ANALYSERS General Commands getSerial - Get the Serial Number of the Analyser Transmit Receive getSerial xxxx Where: xxxx is an alphanumeric value. Description This command will return the Serial Number of the Analyser. This is a unique number and is useful if multiple LED Analysers are used in a System. -
Page 45: Getversion Get The Firmware Revision
FEASA 2-I/3-I LED ANALYSERS General Commands getVersion - Get the Firmware Revision Transmit Receive getVersion xxxx Where: xxxx is an alphanumeric value. Description This command will return the Revision Number of the firmware in the Analyser. Example: The PC transmits getversion to the LED Analyser an it will return xxxx to the... -
Page 46: Gethw - Get The Hardware Version
FEASA 2-I/3-I LED ANALYSERS General Commands getHW - Get the Hardware Version Transmit Receive getVersion xxxxxxxx Where: xxxxxxxxxx is an alphanumeric value. Description This command will return the hardware version the Analyser. Example: The PC transmits gethw to the LED Analyser an it will return xxxxxxxx to the... -
Page 47: Setbaudrate - Change The Baud Rate
FEASA 2-I/3-I LED ANALYSERS General Commands Setbaudrate - Change the baud rate Transmit Receive Setbaudratexxxxxx Where: xxxxxxx = 009600,019200,038400,057600,115200,230400. Description This command will change the baud rate of the Serial Port in the Analyser. The default Port settings of the Analyser are 57,600, 8 Data bits, 1 Stop bit and No Parity. -
Page 48: Installing The Led Analyser In A Test Fixture
FEASA 2-I/3-I LED ANALYSERS Installing the LED Analyser in a Test Fixture The LED Analyser may be installed in the Top or Bottom side of a Test Fixture. There are four Mounting Holes which will accept M3 Screws as shown in Figure 19. -
Page 49: Testing Led's
FEASA 2-I/3-I LED ANALYSERS Testing LED's The first step is to make sure the 10-way Selector Switch is set correctly. Refer to Figure 11 and Figure 12 when setting the Switch. If a LED is not being tested then set the appropriate switches to 000 since this will save test time. -
Page 50: Test Sequence Using The Ict Port
FEASA 2-I/3-I LED ANALYSERS Test Sequence using the ICT Port The Test sequence is as follows:- Set the Range Selector Switch for the LED's to be tested. Apply Power to the Led Analyser. Turn on the LED's to be tested. -
Page 51: Command Summary
FEASA 2-I/3-I LED ANALYSERS Command Summary Serial Port Commands CAPTURE Capture LED Color and Intensity Data CAPTURE# Capture using Range # (1 – 6) CAPTUREPWM Capture for PWM LED's CAPTUREPWM# Capture for PWM LED's with Averaging Factor # (0 – 15) GETHSI# Get Hue, Saturation and Intensity for LED # (1 –...
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