Connecting radios all over the world

Mimer Receiver voting - Diversity

When you have problems to receive for exaple your portables or marine radios.

Multiple base station receivers is an easy way of getting better coverage for hand portable radios that have low output power. But in radio systems with multiple receivers on the same channel you will often receive the same audio from several receivers at the same time, with different signal strengths.

Using a voting system (diversity) it will select the best one of the audio signals and you will always hear the best possible signal from all of your base station receivers.

In the drawing below three radio sites with the same Marine-VHF radio channel are connected to one PC operator.

If a ship is between site A and site B, both receivers will pick up the signal. The voting system will then determine which of the two signals are the strongest and present only that signal to the operator.

This gives the operator two advantages:

  • He will only hear audio from one receiver (the best one), meaning no distortion.
  • He will get a visible indication on his screen telling if it was site A, B or C that had best reception. He will then know on which transmitter to respond to get best possible transmission back to the ship. He will also know roughly where the ship is.

Three receiver system with two operators

Mimer SoftRadio

Technical

The diversity option (3103) uses the RSSI output (signal strength) from the radio. (Not all radios have an RSSI output, please check)

All radios in each voting group needs to be of the same type to make the correct comparison.

 

Setting up

When setting up the operators radio connections you also set which radios are to be treated as being in the same diversity group.

You can have as many groups as you like and as many radios as you like in each group, up to the maximum number of radios in your operator position, normally 8 or 30 radios.

The comparison of the signal strengths are made in each operator software. This means that each operator can be set up differently in the system. Not all needs to have the Voting option.

Mimer Reciever voting is used at the River Sava system in Croatia

Back to Top