1. The problem statement, all variables and given/known data A receiving system consists of an antenna with an effective noise temperature of 70 K. This antenna is connected to a microwave front end of noise figure 7 dB via a feeder. The feeder’s specific attenuation function is 0.2 dB/10m. The actual feeder length is 2 m. Calculate the carrier to noise power spectral density at the output of the microwave front end if the received carrier power at the antenna terminals is -100 dBm? 2. Relevant equations I'm assuming it as Cmin = -174 + NF + 10Log10B + C/N Where, NF = Noise Figure, B = Bandwidth, and C/N is a Carrier-to-Noise Ratio which is asked? 3. The attempt at a solution Cmin = -110 dBm Noise Figure (NF) = 7 dB & Struck up in knowing Bandwidth (B) length of feeder is 2 meters, feeder’s specific attenuation function is 0.2 dB/10m, What Next???