One of the mechanisms leading to transmitter-receiver digitization (Tx-Rx) via upconverter-RF is to understand computational rules as the correct solution to harmonic problems. The cause of harmonics on the RF-spectrum in the upconverter-RF architecture is in the quantization process. Any change in the quantization rate causes interference so that an unwanted signal appears in the vicinity of the targeted signal. A number of harmonics appear also due to the rectangular nature during the pulse width/position modulation (PWM/PPM) process. To achieve the optimal elimination of this unwanted signals, having the right selectivity over sampling ratio (OSR) and precise techniques of using fc against the frequency clock (fclock). fclock is a determining factor for determining the number of points of quantization complexity due to the representation of the phase level and amplitude of the signal. Therefore, computational rules are needed to rationalize the size of the harmonic product and the intended harmonic elimination solution. The results showed that harmonic distortion only occurred when the offset application was used in the <40 MHz range so that the noise floor impact did not increase significantly. An important rule in the harmonic distortion elimination step is the use of the optimal polar-Q. The next requirement is in the form of selecting the right offset and OSR in order to reduce the noise floor or noise shape. A decrease in the level of harmonic distortion can occur with the use of a small OSR so that the potential for this unwanted signal elimination solution can be implemented.