As a perfectly sized foundation for its stable measurement results, the ADFA 1 consists of nine antenna elements and an omnidirectional reference antenna. The latter allows the measurement technician to observe the spectrum even in parallel. The principle of automatic goniometry for single-channel receivers is based on measuring the phase difference between antenna elements. Thus, the nine antenna elements are measured relative to the central reference antenna. The greater the distance between them and the larger the recorded phase difference, the more reliable the goniometry readings will be.
In addition to fixed installation, the ADFA 1 can also be mounted on a car roof using a magnetic mount. When connected to the SignalShark, a direction-finding cycle lasts only 1.2 milliseconds, achieving an accuracy of up to 1° RMS (typical result). Beyond simply displaying the recorded bearing, the receiver can also overlay a heat map onto a saved map. This allows the SignalShark's powerful location software to show, in real time and without the need for an external computer, where interference is most likely to be hidden. For precise location of a signal source on-site, even "in the last few meters," an additional pocket antenna can be used with the SignalShark. This allows the surveyor, for example, to enter a building previously located by direction finding and pinpoint the final floor and apartment in question.
