Short Answer
At multiple operational radio locations, frequencies, repeaters, antennas, power, coverage, disturbances, and transitions must be coordinated properly. Depending on the architecture, separate channels, IP Site Connect, roaming, co-frequency operation, or other concepts may be applicable. In Switzerland, such parameters must align with frequency allocation and actual operations.
More locations do not automatically mean a better radio network. They also increase the requirements for planning and documentation.
What Needs to be Coordinated
- Locations, antenna heights, and transmission power.
- Overlap zones and disturbance potential.
- Channels, groups, and repeater logic.
- BAKOM specifications and documentation.
- Measurement and operational control.
Possible Concepts
| Concept | Application |
|---|---|
| Roaming | Radios switch locations. |
| IP Site Connect | Repeaters are connected via IP. |
| Co-Frequency Operation | Multiple transmitters on the same frequency. |
| Voting | Multiple receiving locations improve return path. |
Typical Errors
New locations are added without properly checking overlap, disturbances, concessions, and group logic.
FAQ
Why is frequency coordination important?
To ensure that locations do not interfere with each other and that operations remain compliant with approvals.
Is co-frequency operation always the best solution?
No. Depending on the application, roaming, IP Site Connect, or separate channels may be more sensible.
Are measurements necessary?
Yes, especially with multiple locations and buildings.
Who coordinates the frequencies?
In Switzerland, BAKOM is responsible; the radio partner prepares the technical foundations.
Sources and Currency
This page was created on July 6, 2026. Technical and regulatory information must be aligned with current manufacturer data, standards, frequency specifications, and site conditions in specific projects.