Control unit for transmission system

Control unit for a transmission system, comprising:

• a sample rate converter, which is coupled to a digital-to-analog converting unit, wherein digital input data are feedable to the sample rate converter;
• a PRBS generator, wherein an output signal of the PRBS generator is feedable to the sample rate converter and to a delay element, wherein an output signal of the delay element is feedable to a frequency synthesizer, wherein the frequency synthesizer is clockable by a reference clock and wherein an output signal of the frequency synthesizer is feedable to a clock input of the sample rate converter and to a clock input of the digital-to-analog converting unit.

Control unit for a transmission system, comprising:

• a sample rate converter, which is coupled to a digital-to-analog converting unit, wherein digital input data are feedable to the sample rate converter;
• a PRBS generator, wherein an output signal of the PRBS generator is feedable to the sample rate converter and to a delay element, wherein an output signal of the delay element is feedable to a frequency synthesizer, wherein the frequency synthesizer is clockable by a reference clock and wherein an output signal of the frequency synthesizer is feedable to a clock input of the sample rate converter and to a clock input of the digital-to-analog converting unit, wherein the control unit is adapted to spread DAC-images of the digital-to-analog converting unit with reduced images power spectral density over a defined frequency range to avoid to spread a fundamental of the digital-to-analog converting unit.