Agilent Technologies B1500A Servisní příručka stáhnout pdf (Strana 207)

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Agilent B1500A/B1505A Programming Guide, Edition 11 3-29

Programming Examples

Pulsed Sweep Measurements

A program example of a pulsed sweep measurement is shown below. This example

measures the bipolar transistor Ic-Vc characteristics.

Table 3-8 Pulsed Sweep Measurement Example

Sub perform_meas(ByVal session As IMessage, ByVal t() As Integer) ’1

Dim i As Integer = 0 ’t(0): Emitter

Dim j As Integer = 0 ’t(1): Base

Dim nop1 As Integer = 11 ’t(2): Collector

Dim nop2 As Integer = 3 ’t(3): not use

Dim data(nop2 - 1, nop1 - 1) As String

Dim value As String = "Ib (mA), Vc (V), Ic (mA), Time (sec), Status"

Dim fname As String = "C:\Agilent\prog_ex\data6.txt"

Dim title As String = "Measurement Result"

Dim msg As String = "No error."

Dim err As Integer = 0

Dim v0 As Double = 0 ’13

Dim vc1 As Double = 0

Dim vc2 As Double = 5

Dim iccomp As Double = 0.05

Dim ib1 As Double = 0.003

Dim ib2 As Double = 0.007

Dim vbcomp As Double = 5

Dim ib As Double = ib1 ’secondary sweep output value

Dim d_ib As Double = 0 ’secondary sweep step value (delta)

If nop2 <> 1 Then d_ib = (ib2 - ib1) / (nop2 - 1)

Dim hold As Double = 0

Dim delay As Double = 0

Dim s_delay As Double = 0

Dim rep As Integer = nop1

Dim mret As String ’27

Dim sc(nop1) As Double

Dim md(nop1) As Double

Dim st(nop1) As String

Dim tm(nop1) As Double

session.WriteString("FMT 1,1" & vbLf) ’ASCII, <CRLF EOI>, w/sweep source data

session.WriteString("TSC 1" & vbLf) ’enables time stamp output

session.WriteString("FL 0" & vbLf) ’sets filter off

session.WriteString("AV 10,1" & vbLf) ’sets number of samples for 1 data

session.WriteString("CL " & t(3) & vbLf) ’36

Line Description

2 to 11 Declares variables used through the project. And sets the proper values.

13 to 26 Declares variables used to set the source output, and sets the value.

27 to 31 Declares variables used to read the measurement data.

32 to 35 Sets the data output format, time stamp data output mode, SMU filter, and averaging.

36 Disables SMU assigned to t(3) that is not needed.

1 2 ... 202 203 204 205 206 207 208 209 210 211 212 ... 597 598

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