R&S®FSW-K70 Measuring the BER and the EVM for Signals with Low SNR - Application Sheet

Measuring the BER and the EVM for Signals with Low SNR

Measuring the BER and the EVM for Signals with Low SNR

Signals with low signal-to-noise ratios (SNR) often cause bit errors during demodulation, so that modulation

accuracy values such as the error vector magnitude (EVM) may not be determined correctly.

This application sheet describes:

• The significance of the Bit Error Rate (BER) parameter for signal analysis
• How the FSW VSA application calculates the BER and determines bit errors
• How this knowledge can be used to obtain correct modulation accuracy results