COMMUNICATIONS APPARATUS, COMMUNICATIONS SYSTEM AND METHOD OF DETERMINING SIGNAL ISOLATION

摘要

A communications apparatus (200) is configured to provide wireless network access in accordance with a communications standard that specifies a transmit OFF power threshold requirement. The apparatus comprises a hardware subsystem (300) comprising a test signal control component (306), a duplexer component (208), and Radio Frequency processing components (302). The Radio Frequency processing components (302) comprise a transmitter chain portion (204) having an output operably coupled to a transmit side port of the duplexer component (208). The Radio Frequency processing components (302) also comprise a receiver chain portion (206) having a signal sensitivity threshold associated therewith and is operably coupled to a receive side port of the duplexer component (208). The test signal control component (306) is arranged to cooperate with the transmitter chain (204) to generate a test signal, a portion of the test signal control component (306) being leaked by the duplexer component (208) from the transmit side port to the receive side port thereof. The test signal control component (306) is also configured to ensure that any irradiated power of the test signal complies with the transmit OFF power threshold requirement and the portion of the test signal leaked is above the signal sensitivity threshold of the receiver chain portion.