VXI VT1538A user manual Agilent E1538A Enhanced Frequency/Totalize/PWM SCP

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To measure period at channel 45 as the average of 1000 signal periods:

*RST TRIGGER:TIMER .2 SENS:FUNC:PER (@145) SENS:PER:RANGE 1,(@145) SENS:PER:MODE NPER(@145) SENS:PER:NPER 1000,(@145) ALG:DEF ’ALG1’,’writecvt(I145,45);’

INIT do loop

SENS:DATA:CVT? (@45)

read value from CVT query above end loop

Alg executes at .2 sec intervals ch 45 to measure signal period set period range 10μsec - 1sec set meas interval by n periods meas and avg 1000 sig periods alg puts period in CVT

start algorithm execution

get period from CVT

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Contents VT1538A VXI Technology, Inc Introduction Support Resources User’s and Scpi Programming Manual Page About this Manual Agilent E1538A Enhanced Frequency/Totalize/PWM SCPIntroduction Identifying the Plug-on Important Switch Location and Example Settings Setting Configuration SwitchesConnecting To The Terminal Module InstallationE1419A Option 11 Terminal Module Connections Recommended Signal ConnectionsRecommended Connections and Voltage Limits Input and Output CharacteristicsE1538A Input/Output Characteristics VRS Mode Input Operation SCP Channels 0 & 1 onlyShows the VRS mode input characteristics Programming With Scpi CommandsSetting the Input Threshold Level Configuring I/O DirectionInppol Norm Determining the Input Threshold LevelTo set channels 40 through 43 to input digital states Reading Static Digital StateInit SENSDATACVT? @44 Totalize Positive or Negative Edge State ChangesAbout Period Frequency Measurements SENSDATACVT? @45 SENSDATACVT? @45 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Sensfuncquad 0,@148,149 Sense Quadrature PositionRPS Sense Rotational Velocity Example of Rotational Velocity SenseOutput Static Digital State Controlling Output PolarityVariable Width Pulse Per Trigger Variable Width Pulse Train PWM Variable Frequency Fixed Width Pulse Train FM Variable Frequency Square-Wave Pulse Train Rotationally Positioned Pulse Output Rotational Pulse Command Usage Algupdate Init RST Sensfuncrvel 12,MISS,@140 Example of variable position, preset widthVariable Position, Width Preset by Time Example of variable width by angle, preset position Fixed Position, Variable Width by Angle Example of variable width by time, preset positionALGSCALAR’ALG1’,’Width2’,.010 Stepping mode values Stepper Motor Control Use the commandSensfuncvolt @100 Full Step Mode, Full and Half Speed, 4-Channel Page RST and *TST important Command Syntax For newer Units only Scpi Command ReferenceCommand Syntax For newer Units only Discussed Comments INPutPOLarityINPutPOLarity? ParametersINPutTHResholdLEVel? Level can be set to a resolutionINPutTHResholdLEVel Send with VXIplug&play Function hpe14XXcmdReal64Q OUTPutPOLarityOUTPutPOLarity? SENSeFREQuencyAPERture SENSeFREQuencyLIMitLOWer Related Commands SensfreqaperSENSeFREQuencyAPERture? Init SENSeFUNCtionCONDition Related Commands INPutPOLaritySENSeFREQuencyLIMitLOWer? SENSeFUNCtionPERiod SENSeFUNCtionFREQuencySENSeFUNCtionQUADrature SENSeFUNCtionPWIDthSENSeFUNCtionRVELocity RPS SENSeFUNCtionTOTalize SENSePERiodAPERture SENSePERiodLIMitUPPer SENSePERiodAPERture?Init SENSePERiodMODE SENSePERiodLIMitUPPer?SENSePERiodNPERiods Related Commands SENSePERiodMODESENSePERiodMODE? Send with VXIplug&play Function hpe14XXcmdInt32Q SENSePERiodNPERiods?SENSePERiodRANGeUPPer RST Condition is Send with VXIplug&play Function hpe14XXcmd SENSeTOTalizeRESetMODESENSePERiodRANGeUPPer? SOURceFMSTATe SENSeTOTalizeRESetMODE?Send with VXIplug&play Function hpe14XXcmdInt16Q SOURceFMSTATe?SOURceFUNCtionRPULse SOURceFUNCtionSHAPePULSe SOURceFUNCtionSHAPeCONDitionComments Send with VXIplug&play Function hpe14XXcmd SOURceFUNCtionSHAPeSQUareSOURceFUNCtionSTEPper Relationship of minvel, and maxvel Usage See Stepper Motor Control on SOURcePULMSTATeSOURcePULSePERiod SOURcePULMSTATe?SOURcePULSeWIDTh SOURcePULSePERiod?33,554,430 to 33,554,430 SOURcePULSeWIDTh?SOURceRPULsePOSitionANGLe Usage SOURceRPULsePOSitionANGLe?SOURRPULseVARType SOURceRPULseWIDThANGLe SOURRPULseVARType?00000787 to SOURceRPULseWIDThANGLe?SOURceRPULseWIDThTIME SOURceRPULseWIDThTIME? General Specifications SpecificationsFrequency Measurement Pulse Width Measure Rotational Pulse Source