A probe connector includes an insulating housing defining inserting passages each longitudinally penetrating therethrough with a blocking rib being protruded in a periphery inside thereof. The portable information terminal comprises a display unit and a casing surrounding said display unit. A scatter emitter is positioned within the chamber such that light strikes the receiver when reflected off particles suspended in the test atmosphere. The second equalizerdecoder unit performs a second equalizing operation, second TCM decoding and second RS decoding on the received symbol to output a transport stream. The reverse coupler receives DC electric signals at the second side of the package and transmits DC electric signals at the first side of the package.