Hi ADI members,
This is ACER RD Anthony.
We use the synthesizer ADF4158, and have some question to ask you.
As attached picture,
Now, our VCO(Zcomm V940ME03-LF) phase noise reached to -86 dBc using the external synthesizer(datasheet as attachment, phase noise:- 90dBc) to lock frequency 5800 MHz.
- We want to improve the synthesizer + VCO architecture phase noise. (Target: -90dBc)
So how to improve it? Would you have improve method or idea?
- The synthesizer phase noise: -90dBc.
The VCO phase noise: -85dBc.
We combined them to PLL architecture.
The phase noise whether dummy by VCO(-85dBc)=> Is it possible?
- VCO(V940ME03-LF) output power is -1dBm. (VCO datasheet typical is 2dBm)
Why we measure lower 3dBm? (we use spectrum to measured it)
Anthony Tung 董家銓
Communication Dept. I
Tel: +886-2-26963131 Ext. 5704