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R3267 Series Spectrum Analyzer Operation Manual (Vol.1)
2.3.11 AM Modulation Frequency and Modulation Factor of AM Signals
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2.3.11 AM Modulation Frequency and Modulation Factor of AM Signals
This section describes how to measure the residual AM of an AM oscillator (for low amplitude modulation
factors).
Measurement conditions: The target of the measurement below is a signal whose input signal character-
istics consist of an output frequency of 400 MHz, a level of 0 dBm, a modula-
tion frequency of 1 kHz and a modulation factor of 5%.
Use appropriate parameter values when making the measurements in the ex-
ample shown below.
Setup
1.
Connect the unit under test as shown in Figure 2-132.
Figure 2-132 Setup for Measuring AM Signal
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.
Setting the measurement conditions
This changes the analyzer settings so that the input signal is displayed more clearly.
5.
Press FREQ, 4, 0, 0 and MHz.
A center frequency of 400 MHz is set.
6.
Press SPAN, 5 and kHz.
A frequency span of 5 kHz is set.