Agilent Technologies 4294A Service Manual download pdf (Page 231)

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13 231

Application Sample Programs

Measurement using scanner

1. Chapter Title

2. Chapter Title 13. Application Sample

4. Chapter Title

5. Chapter Title

Programs

performed here. Because the phase compensation is common to all the channels, perform it

for one channel. For the phase compensation, you need to bring the measurement terminal

into the open state as shown in

Figure 13-10.

Figure 13-10 Open state

Step 3. Setting the measurement conditions

Set the list sweep table. Set the sweep condition for each channel for each segment. In this

sample program, the sweep conditions from channels 0 through 3 are assigned to segments

1 through 4.

Step 4. Reading out the compensation coefficient of the fixture compensation

For each channel, perform the open, short and load fixture compensations. For the load

compensation, use a working standard whose value is known. Data measurement for the

compensation coefficient is performed for all segments. After calculating the

compensation coefficient, read out the compensation coefficient for each channel.

Step 5. Creating the scan-aware compensation coefficient

From the compensation coefficient array read out in Step 4, combine the segments that

correspond to individual channels to create the scan-aware compensation coefficient.

Step 6. Executing impedance measurement

Change the sweep range of the manual sweep and the channels and perform impedance

measurement for the multiple channels.

Sample program

Example 13-6 shows a sample measurement program assuming that it is used in a scanning

system (4 channels). This program is stored in the sample program disk as scan.bas.

Lines 70 to 170 Identifies the external controller and Instrument BASIC and sets the

GPIB address and select code.

Lines 200 to 230 Prepares data for the list sweep table using DATA statements.

Segments correspond to channels 0 to 3 from the top.

Lines 250 to 300 Assigns the measurement conditions (adapter setting: 2-m test lead,

measurement parameter: |Z|-q, sweep type: LIST, oscillator power

level setting unit: VOLT, and DC bias setting unit: VOLT) into the

1 2 ... 226 227 228 229 230 231 232 233 234 235 236 ... 517 518

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Agilent Technologies 4294A Service Manual Page 231

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