Keysight Technologies N9321C, Руководство пользователя

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Functions and Measurements
Analysis the Modulated Signals
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ASK/FSK Modulation Analysis
The ASK/FSK modulation 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 Modulation Analysis
Please refer to the procedures below to analysis the ASK
modulation.
1 Connect the signal generator to RF IN connector and turn on
the signal generator’s ASK modulation and RF output.
2 Turn on the ASK demodulation analysis function.
Press
MODE > Modulation Analysis
>
ASK
.
3 Press
Frequency > Carrier Freq > 100 > MHz
to set the carrier
frequency.
4 Press
Meas > Symbol Rate > 10 > MHz
to set the symbol rate.
5 Press
Filter Setup > Ref Filter > Nyquist
to set the filter type.
6 Set the attenuation state to Auto (default):