A narrow band received signal strength indicator circuit, comprising: at least one wideband analog amplifier (214, 218) configured to amplify a received input signal; an analog-to-digital converter configured to convert the amplified received input signal from an analog signal to a digital signal; at least one digital filter configured to filter unwanted signal components from the digital signal; and a controller communicatively coupled to the at least one digital filter, the controller configured to: take, via the narrow band received signal strength indicator circuit, a first predetermined number of received signal strength measurements on each of a plurality of channels; determine, for each of the plurality of channels, an average received signal strength, a quadratic mean and a frequency offset based upon the first predetermined number of received signal strength measurements; determine, based upon the determined average received signal strength and the calculated quadratic mean, whether there is a multi-tone signal on each of the plurality of channels; determine, in response to there being no multi-tone signal on a respective one of the plurality of channels, whether a wanted signal is present on the respective one of the plurality of channels; set, in response to the wanted signal being present on the respective one of the plurality of channels, the received signal strength for the respective one of the plurality of channels to the calculated average received signal strength for the respective one of the plurality of channels; and set, in response to the wanted signal being not present on the respective one of the plurality of channels, the received signal strength for the respective one of the plurality of channels to zero. at least one wideband analog amplifier (214, 218) configured to amplify a received input signal; an analog-to-digital converter configured to convert the amplified received input signal from an analog signal to a digital signal; at least one digital filter configured to filter unwanted signal components from the digital signal; and a controller communicatively coupled to the at least one digital filter, the controller configured to: take, via the narrow band received signal strength indicator circuit, a first predetermined number of received signal strength measurements on each of a plurality of channels; determine, for each of the plurality of channels, an average received signal strength, a quadratic mean and a frequency offset based upon the first predetermined number of received signal strength measurements; determine, based upon the determined average received signal strength and the calculated quadratic mean, whether there is a multi-tone signal on each of the plurality of channels; determine, in response to there being no multi-tone signal on a respective one of the plurality of channels, whether a wanted signal is present on the respective one of the plurality of channels; set, in response to the wanted signal being present on the respective one of the plurality of channels, the received signal strength for the respective one of the plurality of channels to the calculated average received signal strength for the respective one of the plurality of channels; and set, in response to the wanted signal being not present on the respective one of the plurality of channels, the received signal strength for the respective one of the plurality of channels to zero. take, via the narrow band received signal strength indicator circuit, a first predetermined number of received signal strength measurements on each of a plurality of channels; determine, for each of the plurality of channels, an average received signal strength, a quadratic mean and a frequency offset based upon the first predetermined number of received signal strength measurements; determine, based upon the determined average received signal strength and the calculated quadratic mean, whether there is a multi-tone signal on each of the plurality of channels; determine, in response to there being no multi-tone signal on a respective one of the plurality of channels, whether a wanted signal is present on the respective one of the plurality of channels; set, in response to the wanted signal being present on the respective one of the plurality of channels, the received signal strength for the respective one of the plurality of channels to the calculated average received signal strength for the respective one of the plurality of channels; and set, in response to the wanted signal being not present on the respective one of the plurality of channels, the received signal strength for the respective one of the plurality of channels to zero.