系(xi)統(tong)時(shi)鐘(zhong)(zhong)(zhong)是(shi)數字時(shi)鐘(zhong)(zhong)(zhong)系(xi)統(tong)中實現時(shi)間(jian)同步的重要設(she)(she)備之(zhi)一。系(xi)統(tong)時(shi)鐘(zhong)(zhong)(zhong)是(shi)一種基于高(gao)精度時(shi)鐘(zhong)(zhong)(zhong)芯片的設(she)(she)備，可以提(ti)供高(gao)精度的時(shi)鐘(zhong)(zhong)(zhong)信(xin)號(hao)和(he)時(shi)間(jian)同步功能，用于同步和(he)校準數字時(shi)鐘(zhong)(zhong)(zhong)系(xi)統(tong)中的各個設(she)(she)備和(he)子系(xi)統(tong)。

在數字時(shi)(shi)(shi)(shi)鐘(zhong)系統(tong)中，系統(tong)時(shi)(shi)(shi)(shi)鐘(zhong)通(tong)常(chang)(chang)作為系統(tong)的(de)(de)時(shi)(shi)(shi)(shi)間(jian)參考，向各(ge)個(ge)設備和(he)子系統(tong)提供時(shi)(shi)(shi)(shi)鐘(zhong)信(xin)號和(he)時(shi)(shi)(shi)(shi)間(jian)同步信(xin)息。通(tong)過(guo)使(shi)用高(gao)精度的(de)(de)時(shi)(shi)(shi)(shi)鐘(zhong)芯片和(he)穩定的(de)(de)時(shi)(shi)(shi)(shi)鐘(zhong)源，系統(tong)時(shi)(shi)(shi)(shi)鐘(zhong)可以提供非(fei)常(chang)(chang)精確的(de)(de)時(shi)(shi)(shi)(shi)鐘(zhong)信(xin)號和(he)時(shi)(shi)(shi)(shi)間(jian)同步功能，保證數字時(shi)(shi)(shi)(shi)鐘(zhong)系統(tong)的(de)(de)時(shi)(shi)(shi)(shi)鐘(zhong)精度和(he)穩定性。

系(xi)統(tong)時(shi)(shi)鐘(zhong)(zhong)(zhong)還可(ke)以通過網絡等方式(shi)與(yu)其他系(xi)統(tong)時(shi)(shi)鐘(zhong)(zhong)(zhong)進(jin)行時(shi)(shi)間(jian)同步，從而(er)保證多個數(shu)字時(shi)(shi)鐘(zhong)(zhong)(zhong)系(xi)統(tong)之(zhi)間(jian)的時(shi)(shi)鐘(zhong)(zhong)(zhong)同步和(he)(he)一致(zhi)性。在(zai)數(shu)字時(shi)(shi)鐘(zhong)(zhong)(zhong)系(xi)統(tong)的應(ying)用中(zhong)，系(xi)統(tong)時(shi)(shi)鐘(zhong)(zhong)(zhong)是一個非常重要(yao)的設備(bei)，可(ke)以幫助保證系(xi)統(tong)的時(shi)(shi)鐘(zhong)(zhong)(zhong)精度和(he)(he)穩定性，提高系(xi)統(tong)的可(ke)靠(kao)性和(he)(he)性能。