Meaning of the Link Quality Indicator

The LQI (Link Quality Indicator) on the display of the receiver shows the transmission quality for the respective channel.

On the one hand, the transmission quality depends on the field strength (RF indicator on the receiving channel display). However, on the other hand, it also depends on external sources of interference that cannot be identified on the RF indicator (for example, they may be on the same frequency or a very close neighboring frequency or may not affect the RF strength).

As a basic principle, an LQI value significantly higher than 50% should be achieved for a secure transmission.

The LQI display shows the following information:

Green range from 50% to 100%:

  • No transmission errors

The transmission quality is good enough to ensure an audio quality of 100%.

Yellow range from 20% to 49%:

  • Individual transmission errors: short-term error correction active
  • Individual audio artifacts may be audible

There are initial transmission errors. In rare cases, there are initial audible audio artifacts. Error correction may be active in this case.

Orange range from 1% to 19%:

  • Frequent transmission errors: long-term error correction active
  • Risk of audio drop-outs

The transmission errors increase, which means that the error correction duration also increases. There is a risk of audio drop-outs.

Red range 0%:

  • No transmission

In this range, the transmission quality is so poor that audio drop-outs can no longer be avoided.