| 摘要 |
Pseudo-random sequences (PRS) are used for measuring bit error structures in digital transmission paths, into which sequences labels in the form of test error sequences are inserted at a defined site in the pattern. Often it is not possible to mark the measured data at the sender's end, if, for example, the PRS measuring devices do not allow a label fade-in at the sender's end in end-to-end measurements in international data exchange. The invention provides a means for subsequently providing PRS labels. According to said method, the marker is switched on at the receiver's end before the bit-by-bit comparator and the PRS label is synchronized with the PRS signal received from the sender's end. The PRS labeling at the receiver's end is adapted to the known labeling at the sender's end with respect to the site in the pattern, frequency and number of clock periods. PRS labeling is required to assign slips and systematically occurring bit errors in the transmission path to certain devices. The invention provides a method for the to-the-bit determination of cell losses in ATM measurements. |
