초록 ▼

To transparently transport an incoming clock signal (CLK2) with a known frequency over a network segment wherein transmission between a transmitter (TX) and a receiver (RX) operates synchronous to a transmit clock signal (CLK1) and receiver clock signal (CLK1') which are synchronized, the transmitte

To transparently transport an incoming clock signal (CLK2) with a known frequency over a network segment wherein transmission between a transmitter (TX) and a receiver (RX) operates synchronous to a transmit clock signal (CLK1) and receiver clock signal (CLK1') which are synchronized, the transmitter measures the phase difference (P) between the incoming clock signal (CLK2) and a reference signal (R) obtained from the transmit clock signal (CLK1). The measured phase difference (P) is communicated to the receiver (RX) and used therein to generate a copy clock signal (CLK2).

대표청구항 ▼

[ We claim:] [1.] A method to transparently transport an incoming clock signal (CLK2) with a known frequency over a network segment consisting of a transmitting unit (TX), a transmission medium (TL), and a receiving unit (RX), wherein said transmitting unit (TX) has an transmitter input for receivin

[ We claim:] [1.] A method to transparently transport an incoming clock signal (CLK2) with a known frequency over a network segment consisting of a transmitting unit (TX), a transmission medium (TL), and a receiving unit (RX), wherein said transmitting unit (TX) has an transmitter input for receiving said incoming clock signal (CLK2) and a clock input for receiving a transmit clock signal (CLK1) from a transmitter clock (C1), and said receiving unit (RX) has a clock input for receiving a receive clock signal (CLK1') from a receiver clock (C1') which is synchronised with said transmitter clock (C1),characterised in that said method comprises the steps of:a) measuring a phase difference value (P) between said incoming clock signal (CLK2) and a reference signal (R) obtained from said transmit clock signal (CLK1);b) transmitting said phase difference value (P) from said transmitting unit (TX) to said receiving unit (RX); and(c) generating in said receiving unit (RX) an outgoing clock signal (CLK2') with a frequency equal to the known frequency, said outgoing clock signal (CLK2') having a phase difference from a second reference signal (R') equal to said phase difference value (P), wherein the way said second reference signal (R') is obtained from said receive clock signal (CLK1') is substantially the same as the way said reference signal (R) is obtained from said transmit clock signal (CLK1).