Spectrum database/Engineering calculators
Which coverage scheme fits
A guided decision between an off-air band-selective repeater and a digital distribution system, with the specific model that fits and the risks to watch.
1. What has to be covered?
The dominant factor. Area, or a specific type of space.
2. How many bands at the same time?
More bands means more intermodulation risk and less power per band.
3. Is 2x2 MIMO required?
Decisive for single versus multi-chain design.
4. How many levels?
Multi-floor buildings push the decision towards digital distribution.
5. Remote monitoring?
NMS pays for itself in avoided site visits on multi-point projects.
Schemes side by side
| Aspect | Band-selective repeater | Digital DAS (Cellular Mate) |
|---|---|---|
| Best fit | Single level, large area, outdoor fill-in, tunnels | Multi-floor indoor, 2x2 MIMO, multi-standard, capacity-driven |
| Coverage radius per unit | Large — tens of metres | Smaller — typically 10–15 m in complex interiors |
| Cost profile | Low per unit; scales with area but fewer units | Higher; unit count and cost scale with area |
| Intermodulation exposure | Combiner and feeder PIM must be controlled with multi-band plans | Each band tuned independently — far less prone to intermodulation |
| Main limitation | Bounded by co-channel noise and uplink balance | Needs PoE, switch capacity and headroom space |
Data is compiled from public regulator and operator sources and is indicative. Band-plan charts are proportional layouts unless marked as exact blocks. Always verify against the regulator's official publication before commercial use.