R&S
®
CMW 500 WiMAX Applications
WiMAX TX Measurements
Operating Manual 1202.3986.32 – 03 369
10 WiMAX Applications
The WiMAX firmware applications provide fast and flexible tests on uplink
OFDMA signals. The tests cover the following transmitter properties of a
WiMAX subscriber station:
Average burst power and crest factor
Center frequency error
Modulation accuracy (EVM, I/Q offset, I/Q imbalance)
Spectral flatness
The transmitter tests can be performed in accordance with standard IEEE 802.16™-
2004/Cor 1-2005, IEEE 802.16e-2005, "OFDMA physical layer mode". For basic
information about WiMAX signals refer to standard IEEE Std 802.16™-2004, "IEEE
standard for local and metropolitan area networks".
The R&S CMW 500 provides the following WiMAX firmware applications:
WiMAX Multi-Evaluation Measurement
10.1 WiMAX TX Measurements
WiMAX TX measurements determine the power, crest factor, frequency error,
modulation accuracy, and spectral flatness of an uplink OFDMA signal. All WiMAX TX
measurements are combined in a single multi-evaluation measurement.
10.1.1 WiMAX Multi Evaluation Measurement
The WiMAX "Multi Evaluation" measurement captures an uplink (UL) OFDMA signal
and provides the TX measurement results in a selectable zone and burst.
The following sections describe how to perform and configure the measurement. For a
description of the method of measurement refer to Signal Processing.
Test Setup
How to Measure an UL OFDMA Signal
Frame Settings and Burst Selection
Measurement Results
10.1.1.1 Test Setup
The external RF signal source (mobile phone transmitter, signal generator etc.) is
connected to one of the RF input connectors RF 1 COM or RF 2 COM at the front
panel of the R&S CMW 500. The input level ranges of the connectors are identical; see
RF Connectors. No additional cabling and no external trigger is needed.
To Next Page
Loading...
