Keysight N9340B Demo Manual page 26

Section 12
ASK/FSK Demodulation Analysis (continued)
Figure 17. ASK demodulation
Amplitude Shift Keying (ASK) and Frequency Shift Keying (FSK) are used in
many applications including cordless phones, paging systems, automotive
electronics (TPMS, RKE and PKE) and RFID.
N9340B provides the ASK/FSK demodulation analysis Option DMA. This
capability can be activated with a license key. It supports four display modes:
– Symbol
– Waveform
– ASK/FSK error
– Eye diagram
User-definable limits provide pass/fail indicators. Option AMA provides four
types of measurements:
– Maximum carrier power
– Maximum ASK modulation depth/FSK frequency deviation
– Minimum ASK modulation depth/FSK frequency deviation
– Maximum carrier frequency offset
Metrics include carrier power, ASK/FSK error, ASK depth/FSK frequency
deviation, ASK index, etc. You can save the waveform with metrics and setup
parameters for reports and future measurements.
In the following demo, a source with ASK/FSK generation capability is needed.
For an ASK/FSK signal, usa a Nyquist fi lter, Alpha is 0.35.
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