The method is characterised in that the calibration signal may take any one of three values.

The instrument shall be spanned as it would before an emission test by introducing a span signal.

A second mechanism determines a percentage of calls to block by the network in response to the gauging signal.

In particular, a system and method for calibration of spectral interference signals using an acquired calibration signal are provided.

The amount of the analyte within the test sample is proportional (e.g., directly or inversely) to the intensity of the detection signal calibrated by the intensity of the calibration signal.

A difference is determined by means of a comparator and a calibration signal is emitted to the controller (8) of the pivoting device (11).

Each controller is further arranged to receive and store a calibration signal from the selected transceiver for the group of antennae coupled to the reference transceiver.

The system (10) includes a first mechanism that monitors usage of the telecommunications network and provides a gauging signal in response thereto when the network usage exceeds a predetermined threshold.