Executing Sample Programs

HCI Measurement Program

Executing the Program

You should have already added the bias source control routine and set up the measurement environment as described previously.

Before running the program, do following:

1.Set the GPIB address of instruments as follows:

4155/4156: 717

E5250A: 722

Bias Source: Set the GPIB addresses to match your control routine (Address 701 to 703 are defaults used in SP_MUX_M program)

2.Turn on all instruments and the computer.

3.Boot up HP BASIC operating system.

4.Insert a diskette into the computer's disk drive. The diskette must contain the HCI test program (SP_MUX in this example) you modified in “Adding the Bias Source Control Routine” on page 9-23.

5.Specify the computer's mass storage device (disk drive) the diskette is inserted by using MSI statement. For example, if the device is ":CS80,702,1", enter the following command:

MSI ":CS80,702,1"

6.Load your HCI test program. The following example loads and displays SP_MUX program, in this example.

LOAD "SP_MUX"

EDIT

7.Insert the E5250A Program Disk into the 4155/4156's disk drive, then get the setup file IDVD.MES to set up the 4155/4156.

8.Enter the following command from the command line of the computer:

OUTPUT 722;":ROUT:CLOS (@10101,20101,30101)"

9.Press Single key on the 4155/4156's front panel. The Id-Vds measurement is performed and the Id-Vds measurement result is displayed as shown in Figure 9-5.

10.Determine the drain stress voltage (Vdstr) from the above curve. Recommended maximum value is about 0.5 V below actual breakdown. Then, edit the HCI test program (SP_MUX in this example) , and define the Vdstr value. The value should be defined in the following program line.

Agilent E5250A User’s Guide, Edition 9

9-27

Page 283
Image 283
Agilent Technologies Agilent E5250A manual Load Spmux Edit