Agilent Technologies 4294A Service Manual download pdf (Page 186)

186 13

Application Sample Programs

Basic Measurement

Example 13-1 shows a sample program of a basic capacitor measurement. This program is

stored on the sample program disk as the bsc_meas.bas file.

This program performs the same measurement described in “Learning basic operations” of

the Agilent 4249A Operation Manual. Connect the Agilent

16047E test fixture for lead

parts to the Agilent 4294A, and then start the program. When “Set

Open-Connection”

appears, make the connection to measure data for open compensation, and press the

[y] key

and the

[Enter] key. Then, when “Set Short-Connection” appears, perform the same

operation to measure data for short compensation.

NOTE For how to use the 16047E, for example, the connection to measure data for open/short

compensation, refer to its manual.

Then, when “Set DUT, then Push [Enter] key” appears, mount an already discharged

capacitor onto the test fixture, and then press the

[Enter] key. After the completion of a

single sweep, the self-resonant point is searched for using the marker, and the frequency

and the impedance at that point are displayed. After the display, “Once more? [Y]es/[N]o”

appears. If you want to measure the capacitor again or another DUT, press the

[y] key and

the

[Enter] key to continue the measurement. If you want to finish the measurement, press

a key other than the

[y] key and the [Enter] key. Figure 13-1 shows an example when

executing this program using Instrument BASIC.

Lines 80 to 140 Identifies the external controller and Instrument BASIC and sets the

GPIB address and the select code.

Lines 160 to 250 Substitutes the measurement conditions (adapter setting: NONE,

measurement parameter: |Z|-θ, sweep parameter: frequency, sweep

type: LOG, sweep start value: 100 Hz, sweep stop value: 100 MHz,

bandwidth setting: 2, trace A display format: logarithmic Y axis, trace

B display format: linear Y axis, trace A/B split display: on) into the

variables: Adapter$, Meas_para$, Swp_para$, Swp_type$, Start, Stop,

Bw$, Fmt_a$, Fmt_b$, and Spl_disp$, respectively.

Lines 290 to 300 Sets the adapter selection to Adapter$ and then triggers a reset.

Lines 310 to 360 Sets the measurement parameter to Meas_para$; the sweep parameter,

Swp_para$; the sweep type, Swp_type$; the sweep start point, Start;

the sweep stop point, Stop; the bandwidth, Bw$, respectively.

Lines 400 to 410 Enables bit 8 (calibration/compensation data measurement

completion) in the instrument event status register to use an SRQ and

sets bit 2 in the service request enable register to 1.

Lines 420 to 450 Uses the FNFixt_comp subprogram to measure open/short data. If an

error is detected after each measurement, stops the program. For the

FNFixt_comp subprogram, refer to the description in

Example 4-3 on

page 65.

Lines 490 to 530 Sets the trace A display format to Fmt_a$; the trace B display format,

Fmt_b$; the trace A/B split display, Spl_disp$, respectively.

Lines 570 to 580 Prompts the user to connect a DUT, and waits for a press of the [Enter]

key after the connection.

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