IIP3 Testbench

Measure input third intercept point of system

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Libraries:
RF Blockset / Circuit Envelope / Testbenches

Description

Use the IIP3 Testbench to measure the input third intercept point (IIP3) of an RF device under test (DUT).

Examples

Measure IIP3 of Device Under Test

Example for IIP3 Testbench block.

• Open Script

Parameters

Parameters

Use Internal Configuration block — Use testbench internal configuration block

on (default) | off

Select to use testbench internal configuration block. Clear this parameter to specify your own configuration block.

Note

When using your own configuration block, parameters such as step size, fundamental tones, harmonic order, and simulate noise may affect the measured results.

Simulate noise (both stimulus and DUT internal) — Enable noise modeling in stimulus signal

on (default) | off

Select to enable noise modeling in the stimulus signal entering the DUT and inside the DUT.

Dependencies

To enable this parameter, select Use internal Configuration block.

Input power amplitude (dBm) — Input power to DUT

-30 (default) | scalar

Input power to DUT, specified as a scalar in dBm. You can change the input power by entering the value in the text box or selecting a value using the knob. The specified input power represents the power available at the input ports of the DUT. The valid values are between -90 dBm and 60 dBm.

Input frequency (Hz) — Carrier frequency of DUT

2.1e9 (default) | scalar

Carrier frequency of the DUT, specified as a scalar in Hz. Input frequency must be greater than baseband bandwidth.

Output frequency (Hz) — Output frequency of DUT

2.1e9 (default) | scalar

Output frequency of DUT, specified as a scalar in Hz. Output frequency must be greater than baseband bandwidth.

Baseband bandwidth (Hz) — Baseband bandwidth of input signal

10e6 (default) | scalar

Baseband bandwidth of input signal, specified as a scalar in Hz. The value must be greater than zero.

Ratio of test tone frequency to baseband bandwidth — Position of the test tones

1/8 (default) | scalar

Position of the test tones, specified as a scalar.

Source resistance (Ohm) — Source resistance to measure DUT

50 (default) | positive finite scalar

Source resistance to measure DUT, specified as a positive finite scalar in ohms.

Load resistance (Ohm) — Load resistance to measure DUT

50 (default) | positive finite scalar

Load resistance to measure DUT, specified as a positive finite scalar in ohms.

Show Response spectrum — View response spectrum using a spectrum scope during simulation

on (default) | off

Select to view response spectrum using a spectrum scope during simulation.

Note

To view the response spectrum using a Spectrum Analyzer, you need a DSP System Toolbox™ license.

Ground and hide negative terminals — Internally ground and hide RF circuit terminals

on (default) | off

Select to internally ground and hide the negative terminals. Clear to expose the negative terminals. By exposing these terminals, you can connect them to other parts of your model.

References

[1] Razavi, Behzad. RF Microelectronics. Upper Saddle River, NJ: Prentice Hall, 2011.

[2] Grob, Siegfried and, Jurgen Lindner. “Polynomial Model Derivation of Nonlinear Amplifiers”. Department of Information Technology, University of Ulm, Germany.

[3] Kundert, Ken. “Accurate and Rapid Measurements of IP2 and IP3”, Designer's Guide Consulting,Inc..

Version History

Introduced in R2018a