Specifications

254 Chapter 16
Application Programs
Basic Measurement
Basic Measurement
This application program performs a measurement similar to that of the “Basic operation of
RF device measurement” in the E4991A Installation and Quick Start Guide.
HTBasic example program
Example 16-1 shows a basic measurement program example (HTBasic) to find the
self-resonance point of an inductor. This program is saved under the file name
bsc_meas.htb on the sample programs disk. When the program is executed, “Do all the
preparations for a measurement.” is displayed. Then connect the equipment in accordance
with Chapter 3 “Step 1, Preparations for measurement” in the Installation/Quick Start
Guide and start measurement by pushing the [y] key or the [Enter] key.
When the calibration function is set on, “Do you perform a calibration again?” is displayed.
Push any key other than the [y] key or the [Enter] key to skip calibration. Next, “Connect
OPEN Standard to the DUT port.” will be displayed. Then, after connecting the OPEN
standard, push the [y] key or the [Enter] key and measure the open calibration data. In the
same way, measure Short/Load/Low-loss capacitor calibration data. However, low-loss
capacitor calibration should only be performed as necessary.
Next, “Connect the FXT16197A text fixture to the E4991A” is displayed, and after
connecting the 16197A, push the [y] key or the [Enter] key. Then, “Connect OPEN
Standard to electrode plate on the fixture.” is displayed, and after opening the test fixture
sample connection screen, push the [y] key or the [Enter] key to measure open
compensation data. In the same way, measure short compensation data.
Next, “Connect the DUT to electrode plate on the fixture.” is displayed. After connecting
the chip inductor to the text fixture, pushing the [y] key or the [Enter] key will execute one
sweep, and the marker will search for a self-resonance point; as a result, the frequency and
impedance of that point will be displayed. After the measurement result is indicated,
“Performing a measurement again? [Y/N]” is displayed. When measuring again or
measuring another sample of the same size, push the [y] key or the [Enter] key to continue
the measurement. To finish measurement, push any key other than the [y] or the [Enter]
key.
Line 220 Sets the GPIB address
Lines 240 - 280 Substitutes a variable for the sweep condition. Sets the number of
points (201), sweep parameter (frequency sweep type is logarithmic),
sweep start value (1 MHz), sweep stop value (3 GHz), and electric
current level of the source (1 mA).
Lines 290 - 350 Substitutes variables for the measurement parameter and display
method. Sets the parameters for trace 1 (|Z|), trace 2 (Ls), and trace 3
(Q), the display formats for trace 1 (log), trace 2 (linear), and trace 3
(linear), and the display method (displays all traces superimposed in
one window).
Lines 360 - 380 Substitutes variables for the setting conditions for calibration and
fixture compensation, as well as for the marker function. Sets the
calibration/fixture compensation data measurement point (fixed
frequency point/fixed power point), test fixture used (16197A), and
marker search function (to detect the maximum value).
Lines 400 - 410 Prompts preparation for measurement and waits for input of the [y]