RSALTE Software for Tektronix Real-time Spectrum Analyzers

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Discover, Trigger, Capture, Analyze 

RSALTE provides spectrum and modulation measurements on downlink (OFDMA) and uplink (SC-FDMA) signals in accordance with standard 3rd Generation Partnership Project (3GPP). The Tektronix Real- Time Spectrum Analyzer captures intermittent or random events that other solutions miss,  enabling engineering teams to detect, diagnose and resolve design errors more quickly. The combination of an RSA6100A or RSA3000A Real-Time Spectrum Analyzer (RTSA) and RSALTE demodulation software enables you to perform the much-needed time, frequency and modulation-domain measurements to decompose signals and uncover anomalies, and generate in-depth analysis for troubleshooting LTE devices in the design stage.

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Application Areas

  • Component and System R&D
  • Product Development
  • Design Verification
  • Product Debugging

Features

  • Software Suite for 3GPP LTE downlink (OFDMA) and uplink (SC-FDMA) signal analysis
  • Quickly Detect, Diagnose and Resolve LTE Design Errors
  • Easy-to-Use Graphical User Interface, Running inside the RSA6100 or on Standalone PC
  • Supports RSA3000 and RSA6100 series Tektronix Real-Time Spectrum Analyzers
  • Automate Measurements for System Troubleshooting and Device Stress Testing

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Typical 3GPP LTE Signal Capture

Software Description

RSALTE offers advanced analysis of LTE waveforms captured by the RTSA, including EVM and spectral measurements. For example, RSALTE can easily analyze frequency settling time and phase errors that occur during a burst transmission.  Such capabilities significantly help in understanding and debugging RF performance-related issues. A PC is used to run the RSALTE analysis software and control the RTSA via either a 10/100Base-T Ethernet or IEEE 488.2 GPIB connection. The software's application programming interface allows users to automate measurements to characterize system and device performance. RSALTE software supports Tektronix .IQT and .TIQ file formats, and LitePoint .SIG and .MOD formats.

RSALTE software supports in-band transmit analysis through a graphical display of these tests including:

  • Spectrum (PSD) and Mask
  • Symbol Constellation
  • Spectral Flatness and Delta Spectral Flatness
  • Captured Waveform Display in the Time Domain

To support product debugging, various other graphical displays are supported by RSALTE, including:

  • Phase Error versus Time
  • Frequency Error versus Time
  • CCDF (to Support Compression Analysis)
  • Spectrogram
  • EVM (Versus OFDM Subcarriers; and versus Time)

Besides the graphical display of measurements, RSALTE also presents relevant numerical data including:

  • EVM (All, Data, Pilots, Unmodulated)
  • Power (Peak, Average)
  • Frequency Error
  • Symbol Timing Error
  • Integrated Phase Noise
  • I/Q Imbalance (Amplitude, Phase)
  • Average of Numerical Data over Multiple Captures Can Also be Displayed

RSALTE additionally provides a wide range of compensation methods that can be used for advanced analysis of a captured signal’s sensitivity to certain impairments. For example, the available compensation methods when analyzing OFDM signals include:

  • Phase Tracking (Off, Fast)
  • Channel Estimation (Based on Averaging of the Long Training Sequence, Averaging of the Full Packet)
  • Symbol Timing Tracking
  • Frequency Synchronization (Based on Long Training Sequence or Full Packet)
  • Amplitude Tracking