Keysight Technologies N9340B, User Manual

Page: 82 / 172

Making Measurements
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ASK/FSK Demodulation Analysis
76
ASK/FSK Demodulation Analysis
The ASK/FSK demodulation analysis function supports
four display modes:
• Symbol
• Waveform
• ASK/FSK Error
• Eye Diagram.
User definable limits provide Pass/Fail indicators of four
types:
• Maximum carrier power
• Maximum ASK modulation depth/FSK frequency
deviation
• Minimum ASK modulation depth/FSK frequency
deviation
• Maximum carrier frequency offset.
The metrics includes carrier power, ASK/FSK error, ASK
depth/FSK frequency deviation, and ASK index etc. The
waveform with metrics and setup parameters can be
saved for reports and future Measurements.
In the following example, you can use any source
available (such as your remote key of the car) as long as
it has ASK/FSK generation capability. For ASK/FSK
signal, its Filter is Nyquist and Alpha is 0.35.
ASK Demodulation Analysis
Please refer to the procedures below to analysis the ASK
demodulation.
1 Connect the signal generator to RF IN connector and
turn on the signal generator’s ASK and RF output.
2 Turn on the ASK demodulation analysis function.
Press [MODE], Rotating the knob to highlight Demod-
ulation Analysis
, [ENTER], {ASK}.
3 Press {Carries Freq} > [100] > {MHz} to set the carrier
frequency.