A method, comprising: sending, to a finite impulse response, FIR, filter of an optical transmitter during an operational phase of the optical transmitter, a first signal to adjust a scale factor of each tributary channel of a set of tributary channels of the optical transmitter within a predetermined range, the scale factor of each tributary channel from the set of tributary channels associated with a tap characteristic of the FIR filter; determining a first set of parameters associated with a first tributary channel of the set of tributary channels based on the scale factor of the first tributary channel being adjusted; determining a second set of parameters associated with a second tributary channel of the set of tributary channels based on the scale factor of the second tributary channel being adjusted; determining a power imbalance between the first tributary channel of the set of tributary channels of the optical transmitter and the second tributary channel of the set of tributary channels of the optical transmitter based on the first set of parameters of the first tributary channel and the second set of parameters of the second tributary channel; and sending, to at least one of an optical component of the optical transmitter or an electrical component of the optical transmitter, a second signal to adjust, based on the power imbalance, an operational setting of the at least one of the optical component or the electrical component to reduce the power imbalance between the first tributary channel of the set of tributary channels and the second tributary channel of the set of tributary channels. sending, to a finite impulse response, FIR, filter of an optical transmitter during an operational phase of the optical transmitter, a first signal to adjust a scale factor of each tributary channel of a set of tributary channels of the optical transmitter within a predetermined range, the scale factor of each tributary channel from the set of tributary channels associated with a tap characteristic of the FIR filter; determining a first set of parameters associated with a first tributary channel of the set of tributary channels based on the scale factor of the first tributary channel being adjusted; determining a second set of parameters associated with a second tributary channel of the set of tributary channels based on the scale factor of the second tributary channel being adjusted; determining a power imbalance between the first tributary channel of the set of tributary channels of the optical transmitter and the second tributary channel of the set of tributary channels of the optical transmitter based on the first set of parameters of the first tributary channel and the second set of parameters of the second tributary channel; and sending, to at least one of an optical component of the optical transmitter or an electrical component of the optical transmitter, a second signal to adjust, based on the power imbalance, an operational setting of the at least one of the optical component or the electrical component to reduce the power imbalance between the first tributary channel of the set of tributary channels and the second tributary channel of the set of tributary channels. <EOS>