| 摘要 |
A method for testing a bidirectional communication interface including a transmitter and a receiver in an analogue front-end of a modem, comprising, transmitting a first test signal in a first frequency range with a first amplitude, from the transmitter. The method also includes receiving, at the receiver, a signal in a second frequency range with a first amplitude and transmitting a second test signal in a first frequency range with a second amplitude, from the transmitter. The method further includes receiving, at the receiver, a signal in a second frequency range with a second amplitude and determining a difference value based on the first and second amplitudes of the received signals.
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