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Entry  Thu Oct 28 03:07:53 2010, kiwamu, Update, Green Locking, 80MHz VCO for green PLL : a health check VCO_LPF_fit.png
    Reply  Fri Oct 29 06:20:20 2010, kiwamu, Update, Green Locking, 80MHz VCO for green PLL : VCO calibration calibration.png
       Reply  Fri Oct 29 14:06:12 2010, kiwamu, Update, Green Locking, Re: 80MHz VCO for green PLL : VCO calibration 
       Reply  Mon Nov 8 10:48:58 2010, kiwamu, Update, Green Locking, 80MHz VCO : PLL open loop looks good vco_pll.pngVCO_PLL.png
          Reply  Mon Nov 8 16:03:46 2010, kiwamu, Update, Green Locking, 80MHz VCO : PLL open loop looks good 
          Reply  Thu Nov 11 13:54:05 2010, kiwamu, Update, Green Locking, 80MHz VCO : about PLL hold-in range range_green.pngPLL.png
             Reply  Thu Nov 11 17:47:36 2010, kiwamu, Update, Green Locking, 80MHz VCO : improve PLL hold-in range and put a boost vco_pll.pngVCO_lfb.png
Message ID: 3881     Entry time: Mon Nov 8 16:03:46 2010     In reply to: 3879
Author: kiwamu 
Type: Update 
Category: Green Locking 
Subject: 80MHz VCO : PLL open loop looks good 

Quote:

I measured the open loop transfer function of the 80MHz VCO's PLL while locking it to Marconi.

 

Bad; there should be a passive ~1 MHz LP filter between the mixer and anything that comes after. The SR560 + mixer does not equal a demodulator.

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