3 VMA Mode
3.1 Digital Demod Measurement
ASK Meas Spectrum
Available only when the demodulation format is any ASK type.
ASK Meas Spectrum is the frequency spectrum of the ASK Meas Time trace data.
The demodulator produces the spectrum by windowing and FFT the ASK measured
data. If the measured filter is selected, the spectrum represents the signal after
filtering.
Example
:DISP:DDEM:WIND:DATA MSP
Sets the first window data to ASK Meas Spectrum
ASK Ref Spectrum
Available only when the demodulation format is any ASK type.
ASK Ref Spectrum is the frequency spectrum of the ASK Ref Time trace data. The
demodulator produces the spectrum by windowing and FFT the ASK reference data.
If the reference filter is selected, the spectrum represents the signal after filtering.
Example
:DISP:DDEM:WIND:DATA RSP
Sets the first window data to ASK Ref Spectrum
Demod Error
Displays the general demodulation error results.
Error Vector Time
Available for all modulation formats except any FSK type.
This trace shows the time domain error vector trace data results. The trace contains
the computed error vectors between IQ Meas Time and IQ Ref Time at each point in
time. The values of the error vectors are usually plotted as a magnitude.
Example
:DISP:DDEM:WIND2:DATA EVT
Sets the second window data to Error Vector Time
Error Vector Spectrum
Available for all modulation formats except any FSK type.
Vector Modulation Analyzer Mode User's &Programmer's Reference 220
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