Digital repeater: how does it work?

Digital repeater: how does it work?

The world is going digital, and so are our latest proposed repeaters. But what is the difference between a digital repeater and an analog repeater?

Digital repeaters remove unwanted noise from an incoming signal. Unlike an analog signal, a digital signal, although weaker or distorted, can be clearly perceived and recovered. With analog transmission, signals can be amplified again with an amplifier, but both information and noise are amplified.

Wide band vs narrow band repeater

All Rosenfelt repeaters are wide band repeaters. This means that all providers on this band are amplified. This is a big advantage at no additional cost. A digital repeater is a narrow band repeater: it amplifies only a part of the band. This may seem like a disadvantage, but in some cases it is an essential advantage. For example: you are connected to Vodafone. But T-Mobile's mast is much closer and also exactly in front of Vodafone's mast. Then the normal repeater tunes the signal's power to the best incoming signal. In short, your Vodafone signal also becomes less powerful for the repeater. Whereas it should be extra amplified. A digital repeater only receives the signal from Vodafone and amplifies it. You only have to deal with the provider you choose when using a digital repeater.

The bandwidth of our digital repeaters can be set manually for one or two providers, and for this reason the same can vary between 0.2 and 20 MHz. The only requirement if two providers are selected at the same time is that the LTE frequencies of the providers must be next to each other.

We currently have three digital repeaters in our range:

  1. Rosenfelt L15-DA, up to 3 indoor antennas
  2. Rosenfelt L20-DA, from 4 to 6 indoor antennas
  3. Rosenfelt L23-DA, max. 8-12 internal antennas (depending on cable length)

The L15-DA repeater is the smallest digital repeater for up to three indoor antennas and a maximum room size of about 1,000 square meters.

The L20-DA repeater is suitable for medium-sized rooms, up to a maximum of about 2,000 square meters. An integral part of a repeater kit concerns the indoor antenna that covers the specified area: if there are multiple floors, there will be a need for more indoor antennas (one per floor). To avoid signal loss in a multi-story house, we always recommend using additional indoor antennas to ensure even distribution on all levels. We use splitters and couplers for signal distribution via multiple indoor antennas.

The L23-DA repeater is suitable for covering large areas. For environments up to about 4,000 square meters, with 8-12 indoor antennas, where the LTE signal has difficulty reaching all mobile devices (such as parking lots, shopping malls, offices..). This repeater can amplify the signal widely and is a highly efficient solution for multi-story buildings and industrial areas.

Ask our consultant to plan your PA system so you can cover the whole area you need. If you have any questions about an individual offer, you can also contact us directly at +31 (0)75 771 67 14. We are here to help!