>>> In this measurement the digital transmitter and receiver work independently. The transmitter and the receiver functions can be programmed by setting the TX:MEASURING_SIGNAL and RX:MEASURING_SIGNAL variables. The mode of transmission is the same as in the WORD_TEST measurement. In receiver mode the measuring set counts the code word changes of a timeslot given by the RX:INSERTION_MODE variable. In case of PCM_INTERFACE it is possible to count: * data changes from the voice channels (1...15,17...31) * events from the 0th timeslot * Frame Alignment Word * Frame Service Word * events from the 16th timeslot * Multiframe Word * Signalling ABCD bits * events from the timeslot called "alarm" (a virtual time-slot containing alarm information The measuring time intervals can be set in the ACQUISITION_TIME variable; there is no pause between measurements. The total measuring time can be programmed by the ACQUISITION_TIME and the NUMBER_OF_MEAS_SEQ variables, that is: ACQUISITION_TIME x NUMBER_OF_MEAS_SEQ x 60 [sec] <<< The valid range for the key variables are as follows: TEST_CONFIG D->,->D,DD->,->DD,D-D,DD-DD; VARIABLE_PARAM TIME; TX:TEST_SIGNAL OFF PATTERN; REPORT RESULT-LIST, HISTOGRAM, ALARM-LIST; Typical test scheme can be seen in the following figure: KEDITABRA:8-2-26.BMP +------------------------------------------------------------ D-D -+ | | |+------Â----------+ +-SUT-+ +----------Â------+| ||TX_A | PCMT_A>Ã-->--------´D DÃ-------->-´>PCMR_A | RX_A || || | | | \ / | | | || |+------Á----------+ | X | +----------Á------+| | | / \ | | | |- -| | | +-----+ | +------------------------------------------------------------------+