| 摘要 |
The present invention provides a two-point modulator arrangement with a PLL that can be operated at various reference frequencies. A modulation signal provided by a digital signal processor is supplied as an analog signal at the input of the oscillator in the PLL and as a digital modulation signal on a frequency divider. For the purpose of pulse shaping the digital modulation data, a digital filter is provided that is coupled to the control input of the frequency divider and, in line with the principle proposed, is operated at the same, constant clock frequency as the signal processor, regardless of the reference frequency. As a result, no resynchronization of the digital modulation data is necessary upstream of the digital filter.
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