Synchronizing Acquisitions
10
Agilent InfiniiVision 7000A Series Oscilloscopes Programmer's Guide
783
' Save *ESE (Standard Event Status Enable register) mask
' (so it can be restored later).
Dim varInitialESE As Variant
myScope.WriteString "*ESE?"
varInitialESE = myScope.ReadNumber
' Set *ESE mask to allow only OPC (Operation Complete) bit.
myScope.WriteString "*ESE " + CStr(CInt("&H01"))
' Acquire using :DIGitize.
Set up OPC bit to be set when the
' operation is complete.
' -----------------------------------------------------------------
myScope.WriteString ":DIGitize"
myScope.WriteString "*OPC"
' Assume the oscilloscope will trigger, if not put a check here.
' Wait until OPC becomes true (bit 5 of Status Byte register, STB,
' from Standard Event Status register, ESR, is set).
STB can be
' read during :DIGitize without generating a timeout.
Do
Sleep 4000
' Poll more often than the timeout setting.
varQueryResult = myScope.IO.ReadSTB
Loop While (varQueryResult And &H20) = 0
' Clear ESR and restore previously saved *ESE mask.
myScope.WriteString "*ESR?"
' Clear ESR by reading it.
varQueryResult = myScope.ReadNumber
myScope.WriteString "*ESE " + CStr(varInitialESE)
' Get results.
' -----------------------------------------------------------------
myScope.WriteString ":WAVeform:COUNt?"
varQueryResult = myScope.ReadNumber
Debug.Print "Averaged waveforms: " + CStr(varQueryResult)
myScope.WriteString ":MEASure:RISetime"
myScope.WriteString ":MEASure:RISetime?"
varQueryResult = myScope.ReadNumber
' Read risetime.
Debug.Print "Risetime: " + _
FormatNumber(varQueryResult * 1000000000, 1) + " ns"
Exit Sub
VisaComError:
MsgBox "VISA COM Error:" + Err.Description
End Sub
Summary of Contents for InfiniiVision 7000A Series
Page 1: ...Agilent InfiniiVision 7000A Series Oscilloscopes Programmer s Guide...
Page 34: ...34 Agilent InfiniiVision 7000A Series Oscilloscopes Programmer s Guide 1 What s New...
Page 44: ...44 Agilent InfiniiVision 7000A Series Oscilloscopes Programmer s Guide 2 Setting Up...
Page 58: ...58 Agilent InfiniiVision 7000A Series Oscilloscopes Programmer s Guide 3 Getting Started...
Page 750: ...750 Agilent InfiniiVision 7000A Series Oscilloscopes Programmer s Guide 8 Error Messages...
Page 922: ...922 Agilent InfiniiVision 7000A Series Oscilloscopes Programmer s Guide Index...