Frequently Asked Questions

What can influence the range of a telemetry connection?

  • Obstacles in the radio path:
    If there are, for example trees, in the direct sight line between your ground stations antenna and the transmitter, then the connection will be greatly affected.
  • Electro magnetic noise on the same frequence band of the telemetry:
    Are there any other powerful transmitters active in the near enviroment of the ground station, then these can interfer with the telemetry.
  • If the ground stations antenna is not very well directed to the position of the transmitter, then the signal strength is affected and so also the range.
    This can happen, when the antenna controls were not calibrated good enough during the ground station setup.

Is there a possibility to search for active transmitters in the enviroment of my ground station which could interfer with my telemetry?

Yes, the ground station provid a frequence scanner, which measures the noise on every channel the telemetry uses. To do this it's not recommendable to use the directional antenna of the ground station, but an omnidirectional one (like the transmitters antenna). If you would use the directional antenna, then the noise situation would change as soon as the antenna is rotated into another direction.

Is it possible to increase the range of my telemetry?

Yes, you have several possibilities to do that:

  • You can use a higher gain antenna, which increases the signal level and so the range
  • You can use the PC forecast program to calculate the flight trajectory of your measurement system. Then you can locate the ground station in direction of the trajectory and in up to 100 km (or up to the minimum range of the telemetry) distance to your launch area. This way and under optimal conditions you can get up to a flight distance nearly twice of the telemetries normal range.
  • The telemetry system supports the use of multiple ground stations. If the transmitter leaves the range of one ground station you can easily switch to the next (nearest) ground station and continue with the reception. Recommended for this is to use the forecast program to calculate the trajectory and so get the position requirements for the additional ground stations.

Sebastian Finke


S. Finke