User`s guide

Making Measurements 4
N9340B User’s Guide 73
Analysis the Demodulated Signals
The N9340B provides the optional AM/FM (Option
AMA) and ASK/FSK (Option- DMA) demodulation
analysis function for analysis the demodulated
signals. These functions can be activated by license
key.
AM/FM Demodulation 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 Demodulation Analysis
Please refer to the procedures below for the AM
demodulation 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
Demodulation Analysis, [ENTER], {AM}.
3 Press {Carries Freq} > [100] > {MHz} to set the
carrier frequency.