3 VMA Mode
3.2 Custom OFDM Measurement
State Saved Yes
Range Raw Main Time | Spectrum | IQ Meas | IQ Ref | Error Vector 3D | Error Vector Time | Error Vector
Spectrum | RMS Error Vector Time
| RMS Error Vector Spectrum | Common pilot error | CH Freq Response | EQ Impulse Response | Demod
Results | Burst Info | ccEVM vs Symbol | No Data
Trace Data Results
Trace Data SCPI Description
Raw Main
Time
RMTime The envelope of the captured data record
Spectrum SPECtrum Spectrum is the FFT of the Raw Main Time waveform
IQ Meas MTIMe IQ Meas trace is the measured IQ symbol values used to calculate the EVM data
results. There is one complex value for each subcarrier for each OFDM symbol in
the measurement burst
IQ Ref RTIMe IQ Ref trace is the reference IQ values for computing the signal EVM values. There
is one complex value for each subcarrier for each symbol in the measurement
burst
Error Vector
Time
EVTime Error Vector Time trace shows the OFDM symbol and subcarrier Error Vector
Magnitude vs. Symbol (time) and Subcarrier (frequency)
Error Vector
Spectrum
EVSPectrum Error Vector Spectrum trace shows the OFDM symbol and subcarrier Error Vector
Magnitude (EVM) vs. subcarrier (frequency) and Symbol (time)
RMS Error
Vector Time
REVTime RMS Error Vector Time is a plot of the Root Mean Square (RMS) average of
multiple “RMS symbol EVM” data results
RMS Error
Vector
Spectrum
REVSpectrum RMS Error Vector Spectrum is a plot of the Root Mean Square (RMS) average of
multiple “RMS subcarrier EVM” data results
Common Pilot
Error
CPERror Common Pilot Error trace data shows the difference between the measured and
ideal pilot subcarrier symbols
EQ Impulse
Response
EQIResponse Eq Impulse Response trace for Custom modulation is the equalizer impulse
response
CH Freq
Response
CHFResponse Ch Frequency Response trace for Custom modulation is the channel frequency
response
Burst Info BINFo OFDM Burst Info trace is a summary table of basic burst information grouped by
subcarrier type. Burst information includes EVM, Power, modulation format and
resource unit information
ccEVM vs
Symbol
CESymbol ccEVM per symbol trace
No Data NONE Blank Trace
Pre Demod
Displays the trace data choices that show pre-demodulation results.
Vector Modulation Analyzer Mode User's &Programmer's Reference 414
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