User`s guide

4 Making Measurements
76 N9340B User’s Guide
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
Demodulation Analysis, [ENTER], {ASK}.