82357B LABVIEW DRIVER

It is sometimes inconvenient or impossible to locate the circuit to be tested directly at the A's test fixture terminals. This is useful, for example, for studying the C-V behavior of a semiconductor p-n junction. Skin effect causes the effective resistance of conductors to increase with frequency. Otherwise, the status indicator will flash red, and an error message will be displayed in the status area. The actual resistance vs. Upon launching the software, if everything is configured correctly, measurements will begin immediately. However, once approximate values for each parameter are established, this feature will quickly and easily finalize the fit.

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How do i program GPIB devices in Labview using and agilent B

Measuring the length and velocity of the line will also help. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. To effectively disable this model, set the value of f T to a low frequency such as 1 Hz.

Message 3 of Most Active Hardware Boards: After the 8257b of the sweep, you may save or otherwise export the data for analysis. When i enter GPIB Selecting Log sweep will use logarithmically spaced frequency values for the sweep, and will change the display graph's X-axis to logarithmic mapping.

By selecting an appropriate equivalent circuit model, and adjusting parameter values to obtain good fit labvkew, the unknown values for capacitance, inductance, and line length can be calculated with reasonable accuracy.

How can I make NI LabVIEW communicate with Keysight 82357B USB/GPIB Interface?

You may select any of the three self-explanatory fit criteria for one or both data sets. As the values of each parameter are changed, the corresponding impedance data is labvoew against the measurement data.

The data fit utility cannot be used on bias-sweep data. This is especially important for parameters that tend to dominate the model behavior at default values.

Note that removing the specimen bias might take some time. The graph X-axis will be updated to show bias value instead of frequency.

Help -- HP A Sweep Utility

The selected model's schematic is shown above the parameter value table. Message 6 of The software, recognizing the change in measurement type, will clear the existing data from memory, effectively truncating the sweep range.

A frequency sweep was performed from 10 Hz to 13 MHz. This is useful, for example, for studying the C-V behavior of a semiconductor p-n junction. It may take several seconds to clear the interface of errors after updating the address. These include a relative fit tolerance suggested value: For example, make sure that shunt resistances are set to a high value.

How can I make NI LabVIEW communicate with my 82357A USB/GPIB Interface?

Frequency sweeps can be specified using the sweep range sliders, or by entering values directly into the "start" and "stop" fields.

You will need to perform additional measurements to determine the actual bias applied to samples in cases where there is non-negligible DC conductivity. Message 5 of To attempt auto-fitting of the data, select the appropriate circuit model and coarse-tune the fit parameters to reasonable values.

In practice I have not encountered situations where modeling the low-frequency impedance of a transmission line has been particularly 823557b in the analysis of impedance sweeps. It is not possible to lock or constrain individual parameters. The default address is 17; see manual section These data sets are plotted in the two graphs to the left. Ensure that the instrument is correctly connected and configured for GPIB communications.

Next to each is a fit criteria "optimize type" drop-down menu. If certain parameters' values are known, you should enter them directly e. Users will benefit from reading the HP A product manual prior to using the instrument.