User manual

RIGOL Chapter 2 Functions of the Front Panel of GPSA

2-62 RSA3000 User’s Guide

Third-order Intercept (TOI)

Measurement Interface:

Figure 2-12 TOI Measurement Interface

Measurement Results:

Base Lower, Base Upper, 3rd Order Lower, 3rd Order Upper, frequency and amplitude

of the above four signals, the amplitude difference between each signal and the base

lower signal, as well as the 3rd order intercept point (Intercept) of the base lower

signal and base upper signal.

3rd order lower intercept point = (power of base lower signal - power of 3rd order

lower signal) + power of base lower signal; 3rd order upper intercept point = (power

of base upper signal - power of 3rd order upper signal)/2 + power of base upper

signal.

Measurement Parameters: average count, average mode, auto average, and

span.

1. Avg Number

Specifies the number of times for averaging the measurement results. You can

use the numeric keys, the knob, or arrow keys to modify this parameter; you can

also use the touch screen to modify the parameter.

3rd Order

Lower

3rd Order Uppe

Base

Lower

Base Upp