R3267 Series Spectrum Analyzer Operation Manual (Vol.1)
2.3.10 Third Order Intermodulation Distortion
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2.3.10 Third Order Intermodulation Distortion
This section describes a basic technique on how to measure third order intermodulation distortion in two
signals used with the narrow-band communication system.
Measurement conditions: The target of the measurement below is third order intermodulation distortion
of an RF amplifier (Gain: approx. 8 dB) whose input signal characteristics are
as follows:
•
Input signal 1: A frequency of 100 MHz and a level of 0 dBm
•
Input signal 2: A frequency of 101 MHz and a level of 0 dBm
Use appropriate parameter values when making the measurements shown be-
low.
CAUTION:
The maximum amount of power that can be input to the analyzer is 30 dBm (1 W). When measur-
ing a signal power whose value exceeds this limit, connect an external attenuator so the power can-
not exceed 30 dBm.
Setup
1.
Connect the unit under test as shown in Figure 2-128.
Figure 2-128 Setup for Measuring the Third Order Intermodulation Distortion
Power on
2.
Turn the analyzer and the unit under test power on.
Setting the unit under test
3.
Activate the signal output for the unit under test.
Initialization
This resets the current settings to the factory defaults or user-defined presets.
4.
Press SHIFT and CONFIG(PRESET).
This sets the analyzer to its presets values.
