The following indicators are part of LISNR Radius communications:

  • Signal-to-Noise Ratio (SNR): Indicates in decibels (dB) the amount of interfering noise relative to the received strength of the LISNR Tone.

  • Error Vector Magnitude (EVM): Gives an indication in decibels (dB) of how challenging it was for the LISNR Tone to be received by the LISNR Radius SDK.

  • Header Quality: EVM value indicating the quality of the Header.

  • Payload Quality: EVM value indicating the quality of the Payload.

Any LISNR Tone will report signal strength but only PKAB2/PKAB2_wideband will report quality.

Signal strength and signal quality metrics will be provided with one of the following indicators:

Note:

  • Default values for an unknown signalToNoiseRatio will give the default value of -60.0

Note:

  • Default values for an unknown signalToNoiseRatio will give the default value of 60.0

If you are experiencing either poor signal strength or quality, the following actions are recommended:

  • Transmit at a higher volume.

  • Reduce the distance between the transmitting speaker and the receiving microphone.

  • Angle the transmitting speaker and receiving microphone towards each other and ensure there is nothing obstructing the line of sight.

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