Member level 5
@gilent's 8560 series has B and E types. The E series is suggested for VCO test and has a fine phase noise from 100Hz to 100KHz(-118dBc/Hz@100KHz) with a wonderful ocxo( 1e-7 aging/year), while the 8560B series is very old and has a worse phase noise (-100dBc/Hz@30KHz). Of cource the 8560E seies is much more expensive. My problem is whether the 8560B would have a similar phase noise if a wonderful external referece clk(such as 1e-7 aging/year) is used. Does someone answer my question? thanks.