Agilent Technologies B1500A Instrukcja Obsługi Pobierz pdf (Strona 231)

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Agilent B1500A/B1505A Programming Guide, Edition 11 3-53

Programming Examples

Multi Channel Pulsed Sweep Measurements

NOTE By a trigger such as the XE command, the source channels set by the WNX

commands start output in the order specified by the N value, and then the source

channels set by the MCPNX and MCPWNX commands start output simultaneously.

If you use multiple measurement channels, all measurement channels start

measurement simultaneously.

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

This measures the bipolar transistor Ib-Vb and Ic-Vb characteristics simultaneously.

Table 3-15 Multi Channel 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 = 1 ’t(3): not use

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

Dim value As String = "Vb (V), Ib (mA), Tb (sec), Stat_b, Ic (mA), Tc (sec),

Stat_c"

Dim fname As String = "C:\Agilent\prog_ex\data31.txt"

Dim title As String = "Measurement Result"

Dim msg As String = "No error."

Dim err As Integer = 0

Dim vc As Double = 3 ’13

Dim vb1 As Double = 0.1

Dim vb2 As Double = 0.9

Dim ibcomp As Double = 0.1

Dim iccomp As Double = 0.5

Dim rep As Integer = nop1

Dim mret As String ’19

Dim sc(nop1) As Double

Dim md1(nop1) As Double

Dim st1(nop1) As String

Dim tm1(nop1) As Double

Dim md2(nop1) As Double

Dim st2(nop1) As String

Dim tm2(nop1) As Double ’26

Dim mtm As Double = 0.001 ’measurement time in sec

Dim pcom As String = "0,0.01,0.001" ’hold,period,Mdelay in sec

Dim b_pt As String = ",0,0.005" ’base delay,width in sec

Dim c_pt As String = ",0,0.005" ’collector delay,width in sec

Line Description

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

13 to 18 Declares variables used to set the source output, and sets the value.

19 to 26 Declares variables used to read the measurement data.

27 to 30 Declares variables used to set the pulse and measurement timing, and sets the value.

1 2 ... 226 227 228 229 230 231 232 233 234 235 236 ... 597 598

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