Functions and Measurements
Analysis the Modulated Signals
74
Analysis the Modulated Signals
The N9320B provides the optional AM/FM (Option AMA) and
ASK/FSK (Option- DMA) modulation analysis function for
analysis the modulated signals. These functions can be
activated by license key.
AM/FM Modulation Analysis
Optional AM/FM demodulation analysis provides modulation
metrics, including carrier power, modulation rate, AM
depth/FM deviation, SINAD and carrier frequency offset.
User definable limits provide Pass/Fail indicators of four
types:
Maximum carrier power, Maximum AM modulation index or
FM deviation, Minimum AM modulation index or FM
deviation, and Minimum carrier frequency offset.
The user can save the waveforms with metrics for reporting
as well as the set- up parameters for future measurements or
analysis. In the following example, you can use any source
available (such as AM/FM radio) as long as it has AM/FM
signal generation capability.
AM Modulation Analysis
Please refer to the procedures below for the AM modulation
analysis:
1 Connect the signal generator to RF IN connector and turn
on the signal generator’s AM and RF output.
2 Turn on the AM demodulation analysis function.
Press [MODE], Rotating the knob to highlight AM
modulation Analysis, press [ENTER].
3 Press {Carries Freq} > [500] > {MHz} to set the carrier
frequency.
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