Anritsu ML2430A Manuel d'utilisateur télécharger pdf (Page 215)

6-16

PROGRAMMING

EXAMPLES

The following programming examples are provided as a general guideline on how

to program the ML2430A Series Power Meters using GPIB commands. All exam

ples are written in Visual Basic or C language. The GPIB-specific calls are for the

National Instruments GPIB DLL.

Refer to the IEEE 488.2-1987 Programming Reference book for more information

about how to use the 488.2 commands.

Output Data

Function GetReading (ByVal channel As Integer) As Single

make space for the result

Dim result As String

result = String$(10, 0)

Set the command up

Cmd = “O ” + Str(channel) : CmdLength = Len(Cmd)

Send the command to the device at address 13

(default address of the power meter)

Call DLLsend(0, 13, Cmd, CmdLength, NLend, ibsta%,

iberr%, ibcntl&)

Receive the data from ML2430A at address 13

Call DLLreceive(0, 13, result, 10, STOPend, ibsta%,

iberr%, ibcntl&)

Pass result back

GetReading = Val(result)

End Function

6-128 ML2430A OM

PROGRAMMING EXAMPLES GPIB OPERATION

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Anritsu ML2430A Manuel d'utilisateur Page 215