IL43753A - Process for measuring and/or monitoring the transmission quality of a communications transmission system - Google Patents

Claims (1)

1. WHAT IS CLAIMED ISl Process for measuring and/or monitoring the transmission quality of a communication transmission system, eharaoterlzed by the faot that* at the emitting end* a teat signal la generated which is at least approximately close to a first mathematical funcion covering the whole pattern of the dynamic transmission range,and that thla teat signal is forwarded across the communication transmission system, through a network (N) at the receiving end, said network having a transmission function at least approximately close to a second mathematical function which can be derived from the first mathematical function, to a teat stage(p), and that in thla teat stage(p), the pattern of the rectified teat signal (S5") emanating from the network(N) la compared with a reference signal (S6) the pattern of which follows a third mathematical function which can be derived from the first and second mathematical functions, and that the eventual magnitude of the distortions and/or their number per unit of time are indicated and/or that a fault warning la released when a predetermined distortion la exceeded* Process according to claim 1, further characterized by the fact that, at the emitting end, a bipolar teat signal with an at least approximately exponential pattern la generated and that thla teat signal(SI) is converted to a outifled eignal (93) in the receiving end network (N) whilst a signal(32) integrated from the received teat eignal(81), with at least approximately the same amplitude, la formed and added to the received teat signal (Si) ; and that the resulting eignal (S3) la cleared of its direct currant and irect current voltage components, immediately rectified, and that a reference signal(96) is formed in the teat atage from the instantaneous · Proeeee according to claims 1 or 2 for measuring and/or monitorine the transmission quality of a transmission ohannel including its emitting and receiving end equipment* characterized by the fact that the test signal carried through the emitting and equipment S and the corresponding transmission channel K is drawn from the receiving end equipment(E) at the far aide of the transmission channel (K) and led to a test stagey a test signal detecting switching stagee(PS), returned across the emitting end equipment(s), the transmission channel(κ) and the receiving end equipment(fi) of the other direction of transmission to the source of the test signal, and there carried, across a network(N) to a test stage P(Pig«lb « 5· Process according to claims 1 and 2 for measuring and/or monitoring the transmission quality of the emitting and receiving end equipeiaant of one station of a four*wire connection, characterized by the fact that the test signal carried to one piece of emitting end equipment(3) ie led across a test connection through-connected for the duration of the measurement and/or monitoring to a test stage(P) of the receiving end equipment(E) at the same side of the four-wire connection, through a network(N) (Pig.lc). 6· Prooees according to claim 2 for measuring and/or monitoring the transmission quality of a PCM-time-multiplex communication a t^ r music transmiigsion eyetern* characterized by the fact that, at the emitting end, a bipolar teat algnal vith a more leaa exponential pattern ia generated. 7· Process according to claim 2 or one of the claims 2 through 5 fror measuring and/or monitoring the transmission quality of a time-multiplex transmission system, characterised by the fact that it la possible to measure and/or monitor almost simultaneously the transmission quality of eeveral pieces of end equipment of a time-multiplex transmission system with respectively one test signal generator(PO), one net ork(N) and one test stage(p) over different time channels. 8· Circuit for implementation of the process according to claim I, characterized by the fact that at least one teat signal generator (PG) IS provided which can be individually connected to the emitting end equipment(S) of the transmission channels of a communication transmission system, and that a number of test stages(P) are provided, one for each test signal generator available, and that said test stages(P) can be connected individually over the network(N) provided for each one of them to the receiving end equipment(E)of the transmission channels(κ)« 9· Circuit according to claim 8 for a bipolar teat signal (Sl) with a more or less exponential pattern, further characterised by the fact that the input terminal of the receiving and network(») is connected to the input of an analog signal counter(A) and, across an integrator(l) with a post connected amplifier(V1) to the other input of the analog signal counter (A), and that the output terminal of the latter together with a hlghpaes filter(Hi) with a post~connected rectifier (g) form, the output terminal of the