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Entry  Sat Jan 22 01:56:04 2011, Suresh, Update, Green Locking, Examining the stability of VCO PLL at low frequencies VCO_PLL_stability.pngVCO_PLL_stability.png
    Reply  Sat Jan 22 02:03:55 2011, Koji, Update, Green Locking, Examining the stability of VCO PLL at low frequencies 
Message ID: 4187     Entry time: Sat Jan 22 01:56:04 2011     Reply to this: 4188
Author: Suresh 
Type: Update 
Category: Green Locking 
Subject: Examining the stability of VCO PLL at low frequencies 

[Kiwamu, Suresh, Rana]

Our goal:

        We wished to determine the performance of the VCO PLL at low frequencies,. 

The procedure we followed:

        The scheme is to use the Marconi (locked to Rb Clock) as an 80MHz reference and lock to it using the PLL. 

        We set up the VCO PLL as in the diagram shown in the attachment and obtained the spectra shown below.

Results:

          We need to figure out the PLL servo gain profile in order to build the Inv PLL filter....

 

   

 

 

VCO_PLL_stability.png

 

 

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