Frequency translation module interface

摘要

The invention concerns an apparatus comprising:
a power supply operative to generate an operating DC power for a low noise block converter in a legacy mode of operation, said power supply exhibiting a low output impedance to a reference potential;
a DiSeqC encoder and decoder coupled to said power supply and operative to generate a control tone for communicating to said LNB converter in said legacy mode of operation;
a transceiver operative to receive signals from and transmit signals to a frequency translation module via a protection circuit; and
a switching device including first and second transistors coupled between said protection circuit and said power supply operative to couple said power supply to protection circuit in said legacy mode of operation and to decouple said power supply from said protection circuit in an FTM mode of operation so that an FTM carrier generated by said transceiver may not be distorted by said low output impedance of said power supply.