A Novel Signal Source Amplitude Adjustment Method Based on Noise Floor Region Judgment

This paper proposes a method of signal source amplitude adjustment based on noise floor region judgment. In this method, after setting the initial parameters of the signal source, the amplitude adjustment of the signal source at the current frequency point is started, and the initial cycle is set. After setting the amplitude of the signal source, we turn on the output of the signal source. After judging that the output of the signal source is lower than the minimum output of the signal source, we amplify the signal generated by the signal source and send it to the electric field radiation antenna through the amplifier, so that the radiation interference signal generated will interfere with the subject. The controller adjusts the output of the signal source according to the intensity of the interference electric field and the limit value. Repeat the above steps until the signal source amplitude adjustment requirements of the current frequency point are met, and then adjust the next frequency point. Compared with the existing methods, the proposed method reduces the interference of 'false noise floor' in the adjustment process. This method can avoid the problem that the noise floor of power amplifier output signal is too high, resulting in the output of a small signal source exceeding the limit value, which makes the automatic adjustment of the signal source fail.