3-5 Mobile WiMAX Demod Measurements Chapter 3 —Mobile WiMAX Signal Analyzer
3-8 PN: 10580-00236 Rev. D WiMAX MG
3-5 Mobile WiMAX Demod Measurements
These instruments can demodulate a Mobile WiMAX Signal from a Base Station, and it can
display the results in Constellation, Spectral Flatness, EVM versus Sub Carrier, EVM versus
Symbol, Modulation Summary, and DL-MAP views.
Setup for Demodulator Measurements
1. Press the Measurements main menu key.
2. Press the Demodulator submenu key to open the Demodulator menu, and select one of
the following demodulator measurements.
Constellation
The instrument displays the constellation of the demodulated data symbols over one frame.
The various constellations are color coded as follows:
QPSK is shown in purple.
16QAM is shown in green.
64QAM is shown in yellow.
The numerical results that are displayed in this view are: RCE (rms) in (dB), RCE (pk)
in (dB), EVM (rms) in (%), EVM (pk) in (%), Freq Error in (Hz), CINR, Base Station ID, and
Sector ID. The sample image in Figure 3-5 may differ from any image on your instrument.
1. Press the Constellation submenu key to activate the measurement.
2. Press the Constellation submenu key again to activate the Constellation menu.
3. Press the Reference Points submenu key to toggle the reference points On or Off.
Figure 3-5. Mobile WiMAX Demodulator Constellation Measurement
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