The 8664, et al, has low phase noise in terms of a general purpose signal generator. However, it is quite inadequate as a clock generator. The Agilent E5505 phase noise test system has an accessory frequency divider that you are supposed to use with the E8663 to get low phase noise below 100 MHz. Of course, when that is used, you lose the programmable output attenuator in the E8663. You also have to have a low jitter sine to square wave solution. Other solutions might be better for you, such as using a DDS eval board with a high end 1 GHZ clock source.
When I was working at Agilent Labs, I tried to get the company interested in making a low jitter clock generator. I never got any traction on that. Robin Giffard (of 5071A fame) would say that it wasn't thought of at a high enough level. On 3/7/2019 6:19 AM, Don@True-Cal wrote:
Hi Jim, The 100K to 3G frequency range of the 8664A is what I'm looking for as a general signal source. The low phase noise needed will mostly be under 100MHz for work on clock, trigger and timing circuits. Thanks for the reply, Don
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