Table 3.

Phase noise of clock sources at 1 GHz. (PLL: Phase Locked Loop).

Offset	PLL Solution	Fixed. Freq. Solution
(Hz)	(dBc/Hz)	(dBc/Hz)
1 k	−112	−112
10 k	−123	−142
100 k	−124	−155
1 M	−138	−167
10 M	−151	−168
RMS Jitter (1 kHz–20 MHz)
PLL solution		86 fs
SAW osc. itself		13.5 fs
SAW osc.+distributors		26.3 fs