ICAM Application Notes - Digalog Systems, Inc.
Contents
1. F2B in the CAD directory The F2B file is the principal file produced by PCB Test for Digalog and encapsulates the entire project up to this point It can be used here or with the UniSoft Viewer as a tool to examine every aspect of the board on screen 12 From the File Export menu select To Pronto Fixture The Pull to RefDes dialog will appear Enter the reference designators for the part types which should be given priority when Pronto Fixture assigns nodes to receive pogo pins in the fixture The reference designators MUST be the same as your CAD file and are CASE SENSITIVE For example if you want Pronto Fixture to assign the pogo to an IC pin to a resistor pin to a capacitor pin or to a VIA on the board you would enter U R C VIA Series 2040 Test System ICAM Application Notes This assumes that ICs in your CAD file are designated by the letter U resistors by R capacitors by C and VIAs by VIA Click OK when done 13 The Save As dialog will now appear Specify lt projectname gt xed as the filename and save the file in your project s CAD directory 14 The Pronto Fixture window should now open as Pronto imports the file When the import operation is completed select Options Nail Rank The resulting dialog box will display the criteria which Pronto will use in deciding ss E dex 13 1 which node on each net it will nail with a probe pe KA eme D The 1 criterion receives preference A 02. Valid Allegro Files VAL Veribest Files VRB Cadon Files XED The format for the BOM file must conform to the format specified in the BOM section of the digalog ini file located in your Windows Windows 95 or Winnt Windows NT folder This file is installed on your computer when the UniSoft Factory 200 software package is installed The BOM section should be manually modified if necessary to match the specific BOM format for whatever type of file is being imported A sample BOM format is shown on the next page Series 2040 Test System 17 ICAM Application Notes BOM Style Tabs PartNo 1 Quantity 2 RefDes 3 User1 0 User2 0 User3 0 User4 0 Note that this is a tab delimited text file Style Tabs with the field name first and the field position after the sign The following is a sample section of a matching BOM file PartNo Quantity RefDes 1500 1300 4 C194 C199 C200 C205 1500 1321 12 C115 C121 C123 C132 1500 1322 6 C66 C70 C73 C76 C212 C217 1500 1390 2 C74 C77 1500 1400 7 C48 C54 C58 C69 1500 1405 4 C184 C186 C189 C191 1500 1410 2 C213 C216 1500 1416 2 C214 C215 1500 1426 4 C1 C4 The Parts List file must be in the format of a tab delimited text file with the first field containing the in house part number the second field containing the nominal value to be measured and the third field containing the plus and minus test tolerances separated by a comma For example a 10uF 80 20 capacitor wi
3. Test Repeatability The last thing to discuss is test repeatability This portion of the project will help insure that the customer won t be calling every few days wondering why a certain part of the test program fails with borderline values By examining the variance of the test values of each test the program can be made more robust by applying that knowledge to the limits chosen 6 Series 2040 Test System Obtain Test Specifications Determine Process Requirements Define Tester Resources Design Fixture Series 2040 Test System TEST STRATEGY ICAM Application Notes Write and Debug Tests Verify Test Coverage Determine Test Repeatability End ICAM Application Notes Generating a Test Specification Obtain purchase order to write test application Test specification exists Review test specification D No Modification necessary Yes Write test spec Rejected Approved Get customer approval End Series 2040 Test System ICAM Application Notes Generating a Test Process Description Determine process requirements Write Process Requirements graphical user interface Get customer approval Rejected Approved Series 2040 Test System 9 ICAM Application Notes Define Tester Resources Define tester Have test resources sequences TRMan reviewed Foreach test in the test sequence Write the test sequence description
4. Until all tests in the specification are described Tester resources O K 10 Series 2040 Test System Design the Fixture Obtain CAD Files Run UniSoft Software Run AutoGen Software Send Appropriate files to Fixture House Series 2040 Test System ICAM Application Notes Wire Fixture ID Verify Test Fixture End 11 ICAM Application Notes Write and Debug Tests For each test sequence defined Review test specification Generate Nets Test amp Parts review test Test sequence as applicable Next test sequence Review code Run tests on product 12 Series 2040 Test System Foreach test Insert a fault into the product Run the test program No Yes Next test End Series 2040 Test System ICAM Application Notes Verify Test Coverage Review test specification Review test sequence review code Modify Restart test coverage 13 ICAM Application Notes Fortest run 1to5 a Log data Next test run Foreach test Extract data from logs 14 Test Repeatability Calculate standard deviation of test Compare nominal 3 SD against test limits No Yes Next test Done Review test specification Review test sequence Modify Restart test repeatability Series 2040 Test System ICAM Application Notes PROCEDURES GENERATING A TEST SPECIFICATION As mentioned b
5. Application Notes WRITE AND DEBUG TESTS Nets Tests Open AutoGen and open lt projectname gt When the Hardware dialog appears verify the assignment of the Measurement and Kelvin Matrix Relay boards Also verify the Fixture ID value Click OK when done The screen should look similar to the screen displayed below Since the fixture has already been verified using the Verify Test Fixture routine Page 19 proceed to the debugging routines Be Ed mum Epos ees Het DEWA Ae iit gu ma wmm janan JreezEse ET pesi sete messo Bur He Bac Results EC oo IF EMAR LAN NENI AHH Cagar anaa M191 1EAN Mana ELEH AN Lr a Hi i DOSE AEN S Bid Capacitance ABO IBI Masa 130 0 5 3X Dr WE WH imb B E Cee Fame An LI Mass Me irri Er im Bo EF DCA4EABIDGPBUGI Feuman A 30 1128 Moss 385 Davi 200 D 6 j iik Ce SP Faries AMBEN DDNDS Mana 220 im 3n grin 1E DGMEABIGABINI2 Perens MITE 2EM Moss 50 evr Au Iis iiki CMA SAP Fhiritanica iian Ati Mam 50 im 00 0 gH ri Ine GARAP MPG Petites WIDE HIET Mana S Mer 3n BET zik prm lim a mm Mire a Before any individual parts tests are run the Shorts Opens tests on the nets need to be run Switch to the Nets tab and the dialog on the next page will be displayed This dialog is used to run all of the net tests Tests on individual nets can be performed by selecting an individual net from the Net Editor grid and selecting Execute from the Execute menu or
6. Beton Lr o LE means that a node type will not be nailed under o see tame any circumstances Since surface mount nodes generally not desirable for nailing are O by default and the previously designated pul nodes are 1 it may be best to simply accept the defaults 15 Now open the Options Probe Spacing dialog By default Probe Space 1 should be 100 2 should be 75 and 3 should be 50 This means that Pronto will attempt to 4 SPAG l LU PANDE SPACE E 4 place pogo pins no closer than 100 mils 0 1 iem Missus Ras inch apart if it can do so If not it will try to Moor EO FABEL ercer E h h PROBE sPACE N d PHDHE SPACE A maintain 75 mils and if not 50 mils Due to proce spaccia Paone arare the small size and fragile nature of the PROBE sacEsp E Prone seen a required probes it is best not to attempt CE m eet ii smaller spacing 16 Pronto will attempt to place a nail probe on every net using your specific criteria as its guidelines Any nets which cannot be nailed without violating the criteria will be reported after the nail assignment operation Open the Options Analysis Filter dialog This dialog allows you to specify the reasons to be included in the report As a general rule all reasons except lt 5 pins should be selected 17 Finally open the Options Automatic selection The nail rank criteria dialog box will be displayed once more allowing you to conf
7. consuming most board manufacturers will remove cerrtain components they consider problem parts This eliminates removing some common parts such as resistors diodes and certain capacitors For all tests determined not to be valid the test must be modified and executed again until its validity is confirmed As an alternative a parallel component could be added to the component under test to shift the value out of tolerance while the test engineer observes the changes in results or failures TEST REPEATABILITY Test Repeatability is the last consideration of a test strategy Multiple test runs need to be performed and the data logged The standard deviation of each individual test needs to be calculated If the test results are within the limits determined in the test specification the process is completed If the standard deviation of some of the tests is not within limits the specification and the individual tests themselves need to be reviewed Series 2040 Test System 33 ICAM Application Notes 34 Series 2040 Test System
8. minimize the effects of 60 Hz noise during ICAM measurements This can be accomplished by connecting one of the analog ground patchboard pins on the ICAM board to the fixture An analog ground pin will be labeled as AGND in the patchboard map The connection to the fixture must be placed at a location that also comes into contact with the tester s earth ground A common location to connect to is the base of the fixture The base of the fixture is the framework that holds the fixture s Patchboard with all of the pins inserted into it There usually is a screw that mounts the base to the fixture well The connection to the fixture can be made by loosening the screw wrapping the wire around it and then tightening the screw again Verify Test Fixture Open the AutoGen Nets Shorts Test tabs The Verify Test Fixture Verify Test Fixture dialog is displayed The Probe Channel usually channel 0 left open Probe Channel 0 from the fixture design stage is used to guard connect to analog EU ground a chosen assigned channel and the program executes a Em Shorts Test when the Probe command button is selected The channel and net shorted by the probe should be displayed in the textbox at the bottom of the form All assigned channels should be checked in this manner to avoid potential problems in the debugging stage If no channel or the wrong channel is displayed the fixture has a possible wiring problem Series 2040 Test System 29 ICAM
9. of code within an in circuit test program may be attributed to the need to fit within the customer s manufacturing process This code commonly called an Executive allows the tester to interface with the operator handling equipment and information systems Failure to clearly define what is required before starting to write the in circuit test is almost a guarantee of having to rewrite or heavily modify this section of code For this reason it is necessary to have the test process defined before going any further Because of the large amount of resources that are invested into an Executive many companies develop a standard software library that may be used Digalog Systems provides such a library with its standard AutoGen software package Tester Resources The process of allocating tester resources to achieve the goals set out in the test specification and the process requirements dictates that the programmer review each test and determine what part of the tester is going to be used To fulfill each test specification listed a sequence of tester operations is executed These test sequences if properly documented may serve as the pseudo code or model for the actual code to be written when the in circuit test program is developed Once all of the test sequences have been determined the hardware configuration of the tester may be reviewed If additional hardware is required but not available some of the test sequences may have to be modifi
10. using the Execute tool from the Toolbar However before performing any Shorts Opens tests select the Shorts Test subtab to display the Shorts Test Parameters dialog SHORTS TEST This test checks all activated nets for net to net shorts The test is performed by sequentially measuring the resistance between an individual net and all the other nets Shorts Test Parameters Source Voltage f300 0m Max Shorts Res pp Default Test Time t000m Min Opens Res ino Current Limit 300 0m Shorts Value ioo Source Impedance ino Opens Value io Min Shorts Threshold fi 0 00 Generate Test Parameters SHORTS TEST PARAMETERS The conditions for the test are setup using the Shorts Test Parameter functions as shown to the right 30 Series 2040 Test System ICAM Application Notes Source Voltage Value of the source voltage to be used during the test Default value is 300 mV Default Test Time Establishes the default test time for the test Current Limit Establishes the default current limit for the test Source Impedance Sets the source impedance limit for the test Max Shorts Resistance Used to establish the resistance value below which a net short condition is said to exist If the calculated Net impedance is greater than this value this value is used instead Min Opens Resistance Used to establish the resistance value above which a net open condition is said to exist If the c
11. usr e ng KKN p PC e kd 7 Generating a Test Specification suia de ie iler Roeeta eve EON NUN PRAE ad 8 Generating a Test Process Description osa fei tee pes pen ose eoo ete qase t n anane ta dera elst 9 lBcuprIM cisdco ipo MP PEN 10 Design the EINEM MP T M 11 Write and Debug Tess sese eee dte Roda eddie boom we ag AG Ka We ottobre reset 12 Verify Test Coverage piierne Ia TANG a tutti Ega aa aga d a aga ag lesen eg vem odds 13 Test Repeatability stays 2 vist pa in ooa ra t eas Nani te vitesse e ad aye wen EUR t 14 PROCEDURES T then 15 GENERATINO A TEST SPECIFICATIONS uoi er Nee wa GO ae PURA Pr Orr iet aee 15 GENERATING A TEST PROCESS DESCRIPTION s arose ene tet ee hb eR naen 15 TESTERSRESOURGES 5 544 5 4 vas va ne e bt etii vett tib ipti Mite S EE UE 16 FIXTURE DESIGN Using UniSoft Factory 2000 amp AutoGen see 16 Preparing Files for AutoGen ImpOTt socio oct ipeo eto i rei vetere ies 16 Import Files Into ACEO GCMs quee ET arsi is Se eto ELA RUE REEL D i aue 23 Fixture Manufacturing File Redqulremerts o odsie missos Verre oerte vire rta 24 FIXTURING NOTES tox cucu eras daha aaa A a an BEN aas Kak a AN A eR Aa Ka NENG Na KG A IA NANA sakae an 26 Fixt re Status WV INS os deua dak aan ga Ma eka ja tC So a ME cd odd daa a aa ka a as 26 M trie Relay Bus Witing ss sesa a irte a en tnt We aire evi eso EAR Ga ao Dim ANAA e pa KAN ove aes 26 Matrix Relay Measurement Boards deese perdi bebe
12. ICAM Application Notes ICAM Application Notes Series 2040 Test System 1 ICAM Application Notes INTRODUCTION The purpose of this document is to aid the application engineer in taking an in circuit test project from its inception to completion These notes are generic enough to be used in most projects They include project essentials such as generating a test specification and process description and include fixture creation and testing using the UniSoft 2000 and AutoGen software packages An application engineer should benefit from some or all of these notes in developing a test strategy for whatever project they are assigned to 2 Series 2040 Test System ICAM Application Notes Table Of Contents UN TRO CIO mM 2 APPEICA TION OVERVIEW scudo sae ga ag ag aaa pi ptm D ratas TE DANG a WG A a Kg aga A pe a ea SNORT RES 5 Generating a Test Specification ode pde Poo ES eerta eve EP DM ERN NUN VEA pd 5 Generating a Test Process Description oce stove fed ova dti eb Deua s peuos t eot qe anana t tad aao di eds 5 Tester ReSourCe A Lus doe vota Riot aa Ka Gne Rp RU a ale DAN RN E av RR ERU bs 5 Fixt re DESIGN MC 5 Wiritecand debug Tesis misa opt ER UNA box ome nhe ded oe a naa Sah Aa ep UE 6 Verify T st Coverage misrani d edorteab sun usb e a tav eed Oa age bares rS ek a sapaa 6 Test Repeatability sisien aa ras etam Rn aped oup bed an Rowe bid id 6 TEST SIRATEGY sragen aana nah alaa aj tne at Ha ua UE phe petunt pus demas nau evento
13. UNISOFT PCB View T UNISOFT Pronto Fixture file is missing just cancel the message box The program will import your CAD file and display a textbox which reports any errors or discrepancies in the import process If errors are displayed they may need to be corrected later You can save the errors to a file for reference 6 From the File Options dialog shown below select the Misc Settings tab and set the maximum character length for net names A value of 20 is usually sufficient but check your CAD file to be sure that you set a sufficient length and no net names are truncated Gosen Settings PrinterSetings View Settings Misc Settings Miramum Zoom Levels ther Pins ia Printer usea Screen Coles 5plit Alpharnumedic pins om lampes E sport View F Shoten Met Names on Export Traces b bna Maximum U chars Inbeins Traces in r Zen Limits Minzoom O Max Zoom 1 00n 7 Open the Renumber Nets dialog from the Edit menu to define the minimum and maximum valid net numbers The Minimum net number should be set to 1 in order to reserve 0 for the fixture probe channel and so that net numbers are mapped to corresponding numbered MRly channels The maximum should be set to the highest Series 2040 Test System 19 ICAM Application Notes 20 MRIy channel 8 From the Renumber Nets dialog scroll through the list of nets and locate the ground net Assign net 1 to it This will make the Test Debug pr
14. addition to connecting a Matrix Relay channel to each of the nodes on the UUT the four measurement source ICAM patchboard pins need to be bussed to each of the Matrix Relay boards that are assigned to be used as measurement boards The four ICAM Patchboard pins are in the left and right columns of rows 33 and 34 The four pins are used for the guard bus the current source bus the measurement bus and the voltage source bus In the patchboard map they are labeled as GrdB CrSB MsrB and VtSB respectively The connections are made as follows The guard bus left column row 33 on the ICAM is bussed to the patchboard pin in the left column row 33 on each of the Matrix Relay boards assigned to be used as measurement boards The current source bus right column row 33 on the ICAM is bussed to the patchboard 26 Series 2040 Test System ICAM Application Notes ICAM Board MRLY 0 Siz Measurement un EN LL ium MRLY 1 Measurement 2 eee i MRLY 2 aD Measurement aB pem MRLY 3 Kelvin un ao ea Se ea gt gt E aD c Ra ium ajun Series 2040 Test System 27 Series 2040 Test System ECETIA aan gt an 6z gsngs m pajemosse Aja DN LN pend or oanseaw pg AJUW Uy 2 JO sng 0 24M NIATAM unos pg W uran 24 JO z sng 0 MIM ved vel J ESL AJUW 0 GND CI 91njxij WaA OL Pau oan v sai e4n x
15. alculated Net impedance is less than this value this value is used instead Shorts Value Percentage of calculated parallel resistance to be subtracted when setting the maximum resistance for a specific shorts test Opens Value Percentage of calculated parallel resistance to be added when setting the minimum resistance for a specific opens test Min Shorts Threshold Calculated values below this default will disable the shorts test for the corresponding nets When the Generate Test Parameters command button is selected AutoGen calculates the parallel resistance and the sum of the capacitance for every individual net in the project with the Test Type designated as Shorts amp Opens From this calculated value AutoGen subtracts the Shorts Value to determine the maximum resistance for a short and AutoGen adds Opens Value 96 to determine a minimum resistance for an open If the maximum resistance for a short is greater than the default Max Shorts Resistance the default is used during the shorts test If the minimum resistance for an open is less than the default Min Opens Resistance the default is used during the opens test If the maximum resistance for a short is less than the Min Shorts Threshold the shorts test is disabled Typically the resistance for the shorts and opens values should be between the shorts and opens thresholds The test time is determined by the RC time constant based on the parallel resistance and the su
16. ated on a development computer not 16 Series 2040 Test System ICAM Application Notes attached to a 2040 Test System use the Manual Configuration feature of TRMan to register the proper configuration Save the project As the desired project name A messagebox will appear advising you that the project is not an AutoGen project and would you like to create one Click Yes then close AutoGen Create a CAD folder Use the Windows Explorer to create a CAD folder under the WDigalog Projects projectname folder Note that AutoGen has already created an AutoGen folder for you Add new CAD data to the folder Copy the output file from your CAD system the BOM Bill of Material text file and the Parts List text file for your project into the newly created CAD folder The UniSoft Import dialog supports the following formats Factory 2000 Files F2B Board Files F2B Property Files F2P ICP D 356 Files 356 PADS Files ASC GENCAD Files CAD CAD Star Files CDI NOTE Factory 2000 Old Cells Fixture Files CFF uses the file extension to AutoCad Files DXF determine the import FabMaster Files FAB method If your CAD data Fab All Files FBA uses a different Gerber Layer Files GER extension rename the HPGL Files HPG file as needed Intergraph Files LST OrCad Files MIN Mentor Neutral Files NEU Accel Tango Files PCB Accel PCAD Files PDF Protel Files PRO
17. cess at Digalog Systems i e use on a daily basis rather than when the project is completed This version control system must be RCS compatible with the in house version control system being CVS Comments for the code being written should be clearly understandable by the customer It is the desire of Digalog that the customer maintain his own test programs rather than have Digalog maintain them Verify Test Coverage This part of the application software procedure is designed to prove that the test really does work It is a way to insure that tests that are written will fail when they should The scope of this part of the test needs to be discussed with the customer as it could involve a great deal of time and resources For example A product has 25 components on it It is desired to make sure that if a component is omitted the product will fail the functional test Twenty five products must be made each with a specific part missing and tested to ensure this will happen An alternative would be to have someone remove and replace each part As a second phase of this part of the project the customer desires to make sure that all open pins are detected Boards are made to have one open pin This part of the application software procedure is one of the most crucial to get defined up front It defines what completed means to this project Once the test coverage goals are met the project is almost over All that remains is repeatability
18. drop down listbox Note that a ShortsNET17 and OpensNET17 processes have been created Sample code for the User test for net 17 is shown below Since the OpenPinCheck for this net is of no significance the condition flag is set to IPASS Public Sub ShortsNET17 sd As ShortsData Dim r As Double Unguard 29 Unguard 42 ShortsMeas r 17 0 100 3 001 sd Resistance r sd Condition IIf sd Resistance gt 10 IPASS IFAIL Guard 42 Guard 29 End Sub Public Sub OpensNET17 sd As ShortsData sd Condition IPASS End Sub For more information on the Net Editor consult the ICAM User Manual PN 4200 0165 PARTS TESTS After the Shorts Tests have been determined each individual parts test must be run and debugged Individual tests or groups of tests can be run from the Execute menu The specific parameters for executing each of these tests may Capacitance be tweaked or modified from the Part Editor grid For example the normal Capacitance test time for an individual test from the Test Parameters frame Parts User Parameters is 1 000mS However larger than normal capacitors may take Other longer to charge Obviously the characteristics of some components will Resistance dictate longer test times or different forcing values The Graph function can Capacitance be used to view the stability and or range of specific tests Inductance Diode Zener In some situations the normal test strategy will not properly test a component In t
19. ed If this is not possible the tester resources will have to be increased Fixture Design Fixture design should always follow good documentation practices Complete up front documentation will ensure customer satisfaction Poor documentation on a single fixture may result in selling only one test system to a customer Every customer looks at a test system and fixture supplied by Digalog as one product In order to repeat that product proper engineering practices must be adhered to AutoGen Digalog s test development environment can provide accurate fixture documentation in the form of a net list and wirelist Series 2040 Test System 5 ICAM Application Notes Write and Debug Tests This procedure should be a relatively straightforward part of the whole project Difficulties are usually due to errors and or lack of definition in earlier phases of the project Again good engineering practices should be followed throughout this phase of the project As a minimum 1 It is required that all programs written by Digalog personnel in Visual Basic adhere to the Visual Basic Style Guidelines published by the Digalog engineering department 2 It is required that all programs written by Digalog personnel be spell checked and formatted with the VB Polisher program Settings for this program may be obtained from the engineering manager 3 It is required that a version control system be used as an integral part of the software development pro
20. efore a test specification is a document containing a list of objectives procedures and requirements for testing each individual product Many variables besides testing the actual product need to be considered These include available resources budget considerations time schedule type of testing and level of electronics to be tested etc In addition consumer requirements must be included These include reliability complexity of repair volume Y2K compliance and even ISO 9000 compliance All of these variables and more must be considered and included in a test specification A general specification will not suffice in most cases since testing on some products may lack required capabilities and testing on other products may be too expensive and complex For these reasons each test specification should be a product specific solution to testing needs GENERATING A TEST PROCESS DESCRIPTION The first step in generating a test process description is determining which parts of the product need to be tested and the best way to test each individual part In some cases a simple shorts test may suffice For other parts specific values need to be measured For this reason Digalog has developed a Test Executive which is flexible enough to include a vast variety of test schemes including everything from single resistors to complex RC networks and ICs The executive also provides an interface to the operator automated material handling eq
21. hese situations the programmer may need to develop a User test From the Parts Editor select the Test Type cell for the component in question and click on the down arrow A drop down listbox is displayed with the available choices Select User 32 Series 2040 Test System ICAM Application Notes This designates that a user defined test will be used for that specific component The specific name of the used defined test should also be placed in the comment field For example part Q1 is a transistor Since testing this component is not covered by the normal set of Test Types a User test must be defined For this part set the Test Type to User Under the Comment column reference the test as PartQ1 Now open the Basic subtab Notice AutoGen has already created a process for the test Select the process from the list and create and save the test The test will automatically be run whenever it is within the range determined by the Execute menu VERIFY TEST COVERAGE This is an important part of the testing process As an example a 250 component board would have 250 parts tests executed on it Ideally 250 separate boards would be built each with a different part missing Then each separate test would be checked for validity by failing its respective part on one of the 250 boards As previously mentioned an alternative would be to have someone remove and replace each of the 250 parts one part at a time Since this could be costly and time
22. his file to create the parts and nets NN lists in AutoGen A Hardware dialog box should appear to assign Matrix Relay boards for Measurement or Kelvin Usually on a system with four Matrix Relay boards 0 to 2 would be assigned for measurement and 3 would be used for Kelvin Each project s requirements will vary Check the net count from the Factory 2000 program to ensure that enough MRIy boards 64 channels board are assigned as Measurement Boards For example the net count is 137 This requires that MRly boards 0 1 and 2 are assigned as measurement boards If the net count is 192 or higher additional MRLY boards need to be assigned for measurement In addition at least one MRly board should be designated as Kelvin If enough measurement or Kelvin channels are not present AutoGen will flag error messages in the Log Window for measurement or Kelvin nets that could not be assigned channels when channels are assigned as instructed below The Part Editor should now contain all of the parts in the project From the Nets tab select Assign Channels and Read Probe From the listbox select lt projectname fbp gt When the Hardware dialog pops up again click OK Now select File Save As Under WDigalog Projects select lt projectname gt and click OK When the prompt appears about replacing files click OK The ICAM board provides 16 patchboard pins to create the identification code for the test fixture The 16 fixture ID pins are in the
23. irm your choices or make changes Click Accept and Pronto will begin the process of assigning probes nailing the nets This will take some time depending on the size and complexity of your board 18 Once the nailing process is complete open the Fixture Fixture Analysis dialog to check and see if any nets could not be probed and if so why not Nets may not be probed for a number of reasons In the on screen display red points represent probe locations and yellow points represent nets that were not probed To further investigate individual nets and probes click on the Selection tool in the toolbar resembles a target then click on the node of interest All nodes connected to that same net will turn white If all of the nodes on that net were yellow the net is not probed Further information is displayed in the white bar at the bottom of the screen Series 2040 Test System 21 ICAM Application Notes 22 19 If any nets are not probed you may need to modify your probe spacing criteria in Pronto Step 15 and or your reference designator pull list in PCB Test for Digalog Step 12 and the repeat the probe placement procedure Step 16 The specific steps will depend on the exact nature and complexity of your project 20 Once you are satisfied with the probe placement select the Build Fixture Build Files routine Pronto will build the FBP file which contains the probe information This is one of the principal project files t
24. left and right columns of rows 23 through 30 on the ICAM board They are used to represent a 16 bit hexadecimal number that identifies the test fixture They are labeled as FIDO through FIDF on the patchboard map See the patchboard map to get the bit number associated with each patchboard pin The pin labeled FIDO is the lowest significant bit of the hexadecimal number and pin FIDF is the most significant bit This hexadecimal number representing the fixtures ID can be read with the FixID functional call Any fixture ID pin connected to a digital ground patchboard pin on the ICAM board will be read asa 0 Fixture ID pins that are not connected to digital ground will be read as a 1 Therefore to wire the fixture to have an ID of OxFFEE fixture ID bits 0 FIDO and 4 FIDA would be connected to digital ground and the rest would be left alone The digital ground patchboard pins are labeled as DGND in the patchboard map Typically the Fixture ID is the last 4 digits of the part number of the DUT Lastly open File Wirelist When a message appears saying a wire list was created click OK Backup the project and prepare to send the required files to the fixture manufacturer Series 2040 Test System 23 ICAM Application Notes Fixture Manufacturing File Requirements The files required for manufacturing a fixture are generated by using Digalog Systems AutoGen Unisoft s CAD Connect or Factory 2000 and Unisoft s Pronto Fixture program
25. m of the capacitance For nets with a Test Type designated as either just Shorts or just Opens no calculations are performed and the shorts and opens thresholds in the Net Editor will remain unchanged For nets with high total capacitance test times for these nets may be increased As mentioned above when the maximum resistance for a short is calculated to be less than the Min Shorts Threshold the shorts test is disabled This prevents the program from designating two or more nets connected by a resistance less than the Min Shorts Threshold as shorted Since the Shorts test and Opens test are automatically run before any parts test this group of nets is skipped To properly test these nets the ShortsMeas functional call may be placed in a Series 2040 Test System 31 ICAM Application Notes user test routine to determine the resistance Each net in the group may be individually tested while the other nets in the group are manually unguarded The functional call parameters are covered on in the ICAM User Manual PN 4200 0165 and the measured resistance values for the group of nets are returned to the programmer in the Log Window As an example nets 17 29 and 42 are connected by 4Q resistors The resistance is less than the Min Shorts Threshold and the shorts test for these nets is disabled From the Net Editor set the Test Type for net 17 to User In the Comment field enter NET17 Open the Basic subtab and view the Proc
26. nana Jacks through the right side of the fixture Wire one Banana Jack to channel 0 probe channel Wire one Banana Jack to DGND Discharge Resistors Wire a 100 ohm resistor between Patchboard locations NN14 SBOO and PP11 AGND Wire a 100 ohm resistor between Patchboard locations NN17 SB12 and PP11 AGND Wire the Matrix Relay Measurement and Kelvin boards per attached diagram Enclose page 25 Notes Digalog 2040 Fixture ESD top Plate Plexi Cover All probes on bottom side Provide plot with node numbers Cycle Counter Silk screen node numbers Drill all holes Two Banana Jacks mounted through pan Single strand wiring Include 20 spare probes and sockets for each type used Include 40 spare interface pins Series 2040 Test System 25 ICAM Application Notes FIXTURING NOTES Before any further development can be done a complete calibration and functional test routine MUST be completed on the target development 2040 Test System to ensure accuracy and consistency of the debugging procedure Mount the fixture on the target tester and power Hipiai 0 1 2 3 Ured the system up Open AutoGen and load the lt projectname gt project Use the File dig Hardware option to assign the proper Matrix Relay channels for Measurement and Kelvin This pepe dialog can also be used to check the Fixture ID If the Fixture ID has not been wired by the fixture manufacturer it should be wired now Cancel Fixture Status Wi
27. o be imported into AutoGen and be sent to the fixture house When this operation is complete exit Pronto in the normal manner 21 Once Pronto Fixture exits you will return to the PCB Test for Digalog screen The next step is to import the probe information created by Pronto Select the lt projectname FBP gt file from the Import Probes dialog and click OK The dialog will close and the import process will begin This procedure will take several minutes during which time the program will give absolutely no indication that it is doing anything a minor bug which will be fixed in a later release When the import process is complete the Importing Probes text message box will appear showing the number of probes imported Click Close to exit this box 22 You should now save the lt projectname F2B gt file again in order to merge the imported probe information from Pronto with the original CAD file information It is a complete project file and can be viewed in the free UniSoft viewer or in the PCB Test for Digalog software 23 Open the Digalog Create Wirelist dialog to generate the NET wirelist which is one of the two files AutoGen will eventually import from UniSoft the other is the FBP probe file which was created by the Pronto Fixture program Select the Include Parts checkboxes If you intend to use VIAs as probe points select them also If not leave this box unchecked This will hold down the size of the list Use the Browse butt
28. ocess easier by forcing the large nets to the front of the line You may also wish to assign 2 3 and so forth to other large multiple node nets like power buses 9 If there were any errors displayed during the CAD file import process you may need to edit the properties of the affected components Use the error file from step 5 as a part number reference From the Edit menu open the Find dialog Go to the Part and locate the desired part then click Apply Open the Edit Properties dialog click the Details tab and make whatever changes are needed An example might be a connector that mounts on the solder side but is not actually attached until after the in circuit test is done PCB Test for Digalog may report a potential probe point as being inaccessible because it is located underneath the connector You will need to edit the connector properties to lie to the program and change the connector to a topside mount uncheck the Bottom Side box so the program knows that the probe points are available 10 Your original CAD file may contain the bill of materials BOM information already In order to import your BOM file click the Clear BOM Data under the Edit menu then click Import BOM File Locate your BOM file in the dialog box and import it If any errors are reported such as duplicate parts or parts in the BOM but not in the CAD file you must investigate and correct them 11 At this time save the file filename
29. on to locate your parts library then click OK At this time open NotePad and visually inspect the Net List Any parts that are not correctly formatted here indicate that the part is missing from the library The only other place that parts are checked is at AutoGen Import After a brief delay the Digalog Output File dialog box will open offering to save Digalog wian List Generales the file as lt projectname gt NET in the CAD folder You may save it here or navigate to the AutoGen folder and save it there You should receive a report dialog stating the number of components nodes and nets which qualify I Include Vias petes E Digalog Projects chlename Browse Lox tae 24 You are now finished with the Unisoft portion of the project generation Exit UniSoft and open AutoGen Series 2040 Test System ICAM Application Notes Import Files Into AutoGen Open AutoGen and select File Open The listbox to the right should appear with a directory listing of the available projects in the Digalog Projects directory Select the desired project from the dialog If the project is not an AutoGen project a prompt appears to create one If the project was already created as an AutoGen project disregard any error messages about one line files and continue New Or Existing Project From the File menu click on Import and a listbox will appear with the lt projectname net gt file in it Select t
30. r e un os o enel 27 Fixtire ID and deletn Boards asas sasa ep ak apa pai maro GAR a too te har Meis era ap EIS 28 Kelvin Matrix Relay Channel Wiring cs sineaceidanhvevnsjundsassivndea iadvsseldalagivede na A Eee 29 Connecting the Fixture to Earth GrOUDO Susie heo vett bla mide petat A pastel vito tatus 29 Verify Test TINUE na esa aa ah E dite CHR Om a ice b a Ese bi de D eant va 29 WRITE AI DEBUG TESTS cen Seere aaa emg A da tut tete v tti pudo erdt a teo ee tut Urea osea 30 pr2 rmeut cM 30 SHORTS TEST MEN 30 SHORTS TEST PARAMETERS laossian eai EE VR elei RA 30 PARTS TES P Sirine rae i Tana AE O EN A a Na EAE DE NG vira edid ma ag ERRE 32 VERIFY TEST COVERAGE Qs bots na Ti gali mah A A ea Ka EE ge da sja gh ES e a d Gi Aa Be a a aaa 33 TEST REPEAVABIELPY arrei agan in engah ade na ube ages ad a a vato bobo o Ta Aa D Da a ap KENA 33 Series 2040 Test System 3 ICAM Application Notes 4 Series 2040 Test System ICAM Application Notes APPLICATION OVERVIEW Generating a Test Specification The product s test specification is the central document around which the entire in circuit test is written Digalog personnel cannot begin work on an in circuit test application without a complete test specification This document is a product specific publication usually generated by the manufacturer of the product It contains a list of objectives procedures and requirements for testing Generating a Test Process Description The largest amount
31. ring In addition the ICAM board provides two patchboard pins used to determine the status of up to two fixture vacuum wells The status pin for the first well is in the left column of row 9 and the status pin for the second well is in the right column of row 9 See the patchboard map to view their location The FixStat functional call is used to read the current status of the vacuum wells A fixture status pin needs to be brought low to signal the vacuum is engaged for that well Please note that when a vacuum well is engaged the pin is brought low the FixStat functional call will return a 1 to signal that the well is engaged i e the functional call does not return the high low state of the pin itself A typical wiring method is to have an isolated pad on the UUT and have two pogo pins that will make contact with the pad when the UUT is engaged One of the pogo pins is wired to the fixture status pin for that well and the other pin is wired to a digital ground patchboard pin on the ICAM board Therefore when the UUT is engaged and both pogo pins are in contact with the pad the fixture status pin is connected to digital ground The digital ground patchboard pins are labeled as DGND in the patchboard map If a switch of some sort is used to signal when the UUT is engaged it must be wired such that digital ground is applied to the corresponding fixture status pin when that vacuum well is engaged Matrix Relay Bus Wiring In
32. rts test process requirements to the ICAM test specifications and note any exceptions 2 Determine if the available functional test resources will resolve these exceptions and note specific methods where applicable 3 If it is determined that some components cannot be tested using the current resources the test process may be modified to utilize the current hardware A Determine new test methods using existing hardware B If this is not realistic the tester hardware may need to be increased to include these components C Change the requirements by expanding the tolerances or skip the part test entirely Once this step is completed the tests or sequence of tests can be used as the basis for the actual code used in the in circuit testing FIXTURE DESIGN Using UniSoft Factory 2000 amp AutoGen Preparing Files for AutoGen Import Before any testing scheme or fixture design can be implemented the UUT CAD BOM and Parts information must be put into an importable format This section will walk you through the process of designing a fixture with the UniSoft Factory 2000 and Digalog AutoGen software Create a project folder Open AutoGen and create a new project so that AutoGen can create the project folder structure The Hardware dialog box will be displayed Enter the MRly and Fixture ID information If you re unsure about the current configuration of the tester use TRMan to display the information If the project is being cre
33. s The purpose of some of these files is described below according to their file extension FBS The FBS file is a drilling file containing a sorted probe size list and all of the probe hole locations It is the standard file used for solder side fixture fabrication FBR The FBR file is a report file listing the net related problems found by the software while placing test probes and a summary regarding the required probes and holes which can be used in creating the fixture quotation request FBA The FBA file is a user only reference file containing all of the component pin locations and connection information and is not normally used in the fixture fabrication process It may be useful for other applications FB1 The FB1 file is a user only reference file containing all of the components sorted by their reference designator FBP The FBP file is a drilling file composed of solder side and component top side information It contains a sorted probe size list and all of the probe hole locations FBT The FBT file is a drilling file containing a sorted probe size list and all of the probe hole locations It is the standard file used for component top side fixture fabrication FDB The FDB file contains the same information as the FBS file but in a different drill format FDT The FDT file contains the same information as the FBT but in a different drill format The remaining files produced by the Unisoft programs are either temporar
34. th a part number of 1500 1300 would be entered as 1500 1300 10uF 80 20 A section of a sample file is shown below Partnumber 1500 2030 1500 3020 1500 1300 1500 1304 1500 1305 1500 1310 Value Tolerance 0 1uf 20 20 10uf 20 20 5 6pf 10 10 8 2pf 6 6 10pf 10 10 10pf 10 10 The tolerance field should reflect the test tolerance not the part tolerance For example a 10K 5 resistor should be tested with a 7 tolerance 5 for the part and 2 for the test 18 Series 2040 Test System ICAM Application Notes Ideally this would take the form of a master parts list containing all the electronic parts used in all of the products of your company so that the list can be used in every AutoGen project created At this time the Tester Resource requirements should be reviewed to ensure that enough MRIy channels are present for additional nets and Kelvin channels Also note some components such as transistors tested as two diodes ICs etc may require additional channels to be properly tested 5 Open the Unisoft PCB Test for Digalog program from the Unisoft Factory 2000 program group From the File Open dialog select the proper filter filename extension for your CAD file then navigate to the folder 5Digalog projects lt projectname2 CAD and select the CAD file for your project If you receive a message stating that a traces EMINET Factory 2000 d Ej UNISOFT PCB Markup 4 UNISOFT PCB Test for Digalog BA
35. uipment and information handling systems such as networks and or data collection devices Generate a test process description as follows 1 Classify parts by type such as R Resisters C capacitors D diodes Q transistors etc 2 Determine a test method for each device type and the required accuracy such as R measure ohms C measure capacitance check polarity check leakage D measure forward drop measure reverse breakdown voltage Zener etc By carefully writing the process description extensive modification in later steps of the application can be avoided In addition software libraries can be developed for use in future projects When the test process description is completed the executive may be modified to suit the individual needs of the manufacturer Series 2040 Test System 15 ICAM Application Notes TESTER RESOURCES Now the programmer must review each individual test and determine if the tester resources are adequate to properly test each component These tester resources include 1 ICAM specifications 2 Functional test resources The tester resources can be defined using Digalog s TRMAN software see Tester Resource Manager in the 2040 Maintenance Manual PN 4200 0163 This program will investigate the test system and determine all of the resources in the Testhead and what power supplies are present Once this is accomplished each individual test or test sequence can be defined 1 Compare the pa
36. y ajqissod 9cs 69 J444H 9 01 0000H 9Suey punoa jendra sp1eog upy pue qI sangu ICAM Application Notes 28 ICAM Application Notes pin in the right column row 33 on each of the Matrix Relay boards assigned to be used as measurement boards The measurement bus left column row 34 on the ICAM is bussed to the patchboard pin in the left column row 34 on each of the Matrix Relay boards assigned to be used as measurement boards And the voltage source bus right column row 34 on the ICAM is bussed to the patchboard pin in the right column row 34 on each of the Matrix Relay boards assigned to be used as measurement boards Kelvin Matrix Relay Channel Wiring The source kelvin and measure kelvin patchboard pins on the ICAM board need to be wired to each of the Matrix Relay boards that have been assigned to be kelvin boards The source kelvin and measure kelvin patchboard pins are in the left column of the ICAM board in rows 31 and 32 respectively See the patchboard map to view their location The source kelvin will be labeled as Skvn and the measure kelvin is labeled as Mkvn The source kelvin pin on the ICAM needs to be bussed to the pin in the right column in row 33 on each of the kelvin Matrix Relay boards The measure kelvin pin on the ICAM needs to be bussed to the pin in the left column in row 34 on each of the kelvin Matrix Relay boards Connecting the Fixture to Earth Ground The fixture should be connected to earth ground to
37. y files used by the programs themselves or files which are generated during the process in order to be compatible with earlier versions of CAD Connect and Pronto Fixture if present To prepare a fixture quotation the fixture manufacturer will need the following items Dimensions of the printed circuit board e FBP file produced by Pronto Fixture LST file produced by AutoGen 24 Series 2040 Test System ICAM Application Notes To produce the fixture for solder side probing only the fixture manufacturer will also need the following items e FBR file produced by Pronto Fixture e FBS file produced by Pronto Fixture Fully assembled stuffed printed circuit board To produce the fixture for solder side and component top side probing the fixture manufacturer will also need the following items e FBR file produced by Pronto Fixture e FBS file produced by Pronto Fixture e FBT file produced by Pronto Fixture Fully assembled stuffed printed circuit board It is recommended that the F2B database viewer file created by CAD Connect and the board viewer program EZ Viewer Uniview exe also be sent to the fixture manufacturer This allows the user and the fixture manufacturer personnel to more easily communicate and thus resolve any problems by using a common file for referencing In addition to the standard Ist file it is recommended that the following be added to the end of the file Banana Jacks Place 2 female Ba
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