Model 4200A-SCS Parameter Analyzer Reference Manual Section 6: Clarius4200A-901-01 Rev. C / February 2017 6-227Real-time functions, operators, and formulasA formula that contains only real-time operators and functions is a real-time formula. If a real-timeformula is specified as part of a test, it executes for each data point generated by the test immediatelyafter it is generated. The results of a real-time formula may be viewed in the Analyze sheet or plottedduring the test in the same way as test data.The following operators and functions are real-time operators and functions:• Operators: +, -, *, /, EE, ^ (exponentiation)• Functions: ABS, SQRT, EXP, LOG, LN, DELTA, DIFF, INTEGThe formula below is a real-time formula:• RESULT1 = ABS(DELTA(GATECURRENT))Real-time formulas execute as follows:• If a real-time formula is created before the test is run, the formula executes automatically duringeach run.• If a real-time formula is created after a test has been run, the formula executes initially uponadding it to the test and automatically during each subsequent run.Post-test-only functions and formulasSome Formulator functions are post-test-only. Post-test-only functions execute only at the end ofeach run of the test in which the formula is defined. The results of a post-test-only formula may beviewed in the Analyze Run worksheet or plotted at the end of a test.The post-test-only functions are listed in the following table.AT (on page 6-238) LINFIT (on page 6-250) MINPOS (on page 6-245)AVG (on page 6-231) LINFITSLP (on page 6-251) REGFIT (on page 6-260)COND (on page 6-231) LINFITXINT (on page 6-252) REGFITSLP (on page 6-261)EXPFIT (on page 6-247) LINFITYINT (on page 6-253) REGFITXINT (on page 6-262)EXPFITA (on page 6-248) LOGFIT (on page 6-254) REGFITYINT (on page 6-263)EXPFITB (on page 6-249) LOGFITA (on page 6-255) SUBARRAY (on page 6-245)FINDD (on page 6-239) LOGFITB (on page 6-256) SUMMV (on page 6-246)FINDLIN (on page 6-240) MAVG (on page 6-232) TANFIT (on page 6-264)FINDU (on page 6-241) MAX (on page 6-232) TANFITSLP (on page 6-265)FIRSTPOS (on page 6-241) MAXPOS (on page 6-245) TANFITXINT (on page 6-266)LASTPOS (on page 6-244) MIN (on page 6-233) TANFITYINT (on page 6-267)For example, the formula below is a post-test only formula, because MAVG is a post-test-only function:RESULT2 = MAVG(ABS(DELTA(GATECURRENT)),3)Post-test-only formulas execute as follows:• If a post-test-only formula is created before the test has been run, the formula executesautomatically at the conclusion of each run.• If a post-test-only formula is created after a test has been run, the formula executes initially uponadding it to the test and automatically at the conclusion of each subsequent run.
