Rohde and Schwarz FSL-K92 - WiMAX IEEE 802.16 OFDM Option

The following is an overview of part numbers in this group:

• FSL-K92 - WiMAX IEEE 802.16 OFDM Application Firmware
• FSL-K93 - WiMAX IEEE 802.16 OFDM/OFDMA Application Firmware
• FSL-K92U - Upgrade from FSL-K92 to FSL-K93

The R&S FSL-K92 application firmware allows the analysis of WiMAX signals in line with the IEEE 802.16‑2004 standard. The option offers a wide range of possible settings so that the user can optimally adapt the measurement to the signal to be analyzed. In addition to frequency, bandwidth, and sample rate, the guard interval length of the WiMAX signal can be defined. A wide range of other parameters such as memory depth or trigger settings can be adapted as needed.

The main parameters and results of the measurements are listed in a numeric table:

• EVM results (averaged)
  • EVM (all carriers)
  • EVM (data carriers only)
  • EVM (pilot carriers only)

• I/Q constellation
  • I/Q offset
  • Gain imbalance
  • Quadrature offset

• Power measurement
  • In time and frequency domain
  • Crest factor
  • Radio signal strength indicator (RSSI) measurement
• Carrier frequency error and symbol clock error
• Carrier to interference and noise ratio (CINR) measurement

Plus, equipped with the FSL-K92 option, the FSL analyzer can graphically display the following measurement results:

• Error vector magnitude (EVM) measurements
  • EVM versus symbols
  • EVM versus carriers

• Frequency error and phase error during preamble
• Spectrum flatness
• Adjacent carrier power difference
• Group delay
• Constellation diagram (color‑coded according to modulation)
• Spectrum mask with limit lines and pass/fail indication
• Adjacent channel power (absolute and relative) with noise correction (up to five adjacent channels can be defined)
• FFT spectrum
• CCDF and crest factor
• Overview of all bursts with burst summary list
• Bit stream (color‑coded according to modulation)

The FSL-K92 offers the following additional features:

• Automatic demodulation
• Remote control via GPIB or LAN
• Import and export of I/Q data

The result summary displays the most important parameters for characterizing WiMAX™ signals detected within the period of recording.

The upper part of the screen shows the recorded WiMAX™ signal in the time domain. The lower part displays the minimum, average, and maximum EVM values versus the physical carriers. The blue lines mark the limits of each burst.

The analyzers can be used for measuring both the adjacent channel power and the spectrum mask in line with the IEC/IEEE and ETSI standards. Using predefined limit lines with pass/fail indication, the analyzer determines at a keystroke whether the spectrum conforms to specified requirements.

The constellation diagram of WiMAX™ signals is color-coded according to the modulation. Either the entire zone or individual modulation modes are displayed. The constellation diagram can be displayed either for all carriers or for selected carriers.