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Icom America - 2 way radios

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Linq Repeat logo
Linq Repeat
LINQ Repeat – multicast repeaters
Two or more conventional repeater connect via an IP network to create a multicast system that expands the coverage beyond a single repeater. In this case, the mobile subscriber radio transmits its uplink to the green repeater. The green repeater transmits the downlink on its own frequency while sending the signal to the orange and blue repeaters over IP. Those repeaters transmit their downlink on their unique frequencies thus ensuring the signal reaches all subscriber radios in the system.
Linq Repeat Plus logo
Linq Repeat Plus
LINQ Repeat+ – multicast repeaters with subscriber voting
An optional configuration of LINQ Repeat with the added function of subscriber voting and signal beaconing. In this case, the mobile subscriber radio and repeaters function just as the LINQ Repeat system would where a mobile subscriber radio passes traffic through a repeater to other subscribers in the system. In the background, subscriber voting and beaconing enable the mobile subscriber to listen for the beacon from each repeater to determine which has the strongest signal. Once determined, the mobile subscriber radio switches to that channel for traffic uplink/downlink transmissions. The mobile subscriber radio ignores the downlinks from other repeaters while continuing to listen for the beacons.

Linq Repeat Plus logo
Linq Vote
LINQ Vote – single repeater with system receive voting
One transmitting repeater and two or more receive-only repeaters (voting receivers) make up LINQ Vote. LINQ Vote is useful when mobile or portable radio uplinks cannot reach back to the transmitter/repeater, but the transmitter downlink can reach the desired coverage area. In this case, there are two voting receivers and the mobile subscriber radio uplink signals. The voting receivers send the signals over IP to the transmitter and selects the strongest signal to transmit in the downlink.

Linq Repeat Plus logo
Linq Vote Plus
LINQ Vote+ – multicast repeaters with system receive voting and subscriber voting
This system has at least two transmitters and two voting receivers with the addition of subscriber voting and beaconing. In this case, there are two transmitters and three receivers. Two of the receivers sense the mobile subscriber radio uplink signal which they send over IP to the two transmitters. Each transmitter selects the strongest signal to transmit as downlink. In the background, the mobile subscriber radio listens for the beacon to select the transmitter with the strongest downlink as its uplink channel.

Linq Simulcast
Linq Simulcast
LINQ Simulcast – simulcast repeaters with signal comparator voting
Two or more repeaters operate on the same downlink and uplink frequency pair make up a simulcast system. No system voting or subscriber voting is necessary. In this case, the mobile subscriber radio sends traffic over a common uplink frequency to any repeater within range. Each repeater sends its uplink traffic to the central comparator to select the strongest signal. With the aid of GPS and NTP timing synchronization, the comparator sends the traffic signal and timing information to each transmitter for downlink at a specific time to ensure good performance in the overlap areas.

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