PLL locked to 60Hz. line frequency via a 3rd. order 55Hz BP filter
Injection Level is 0dBm into 600 Ohms.
Input Frequency 95Hz.
Bandwidth: (Excluding 60Hz. components)
Is about 210Hz. half power (-3dB) points at .1Hz and 210Hz
The Band-Stop (-60dB) Bandwidth is about 2KHz.
Band-Pass ripple is ~1.5dB between 1Hz and 210Hz.
Band Rejection:
Approximately (50 to 60)dB attenuation of 60Hz. and all higher order harmonics
up to 180Hz.
Note: less than 1 second is required to 60Hz. component rejection to stabilize to 1%.
No over shoot or critical damping is experienced.
PLL Lock Range Test
The PLL appears to have about 22Hz.
(48 to 70)Hz
Sensitivity Test (Preformed in the Lab)
Setup:
PLL locked to 60Hz. line frequency.
Injection Frequency is 95Hz Injection Level is 0dBm into 600Ohms.
Noise Floor: ~-70dBm
MDS: ~-67dBm
Blocking Dynamic Range:
Filter starts limiting at +15dBm
Therefore: BDR= -70 - (+15), = 85 dBm
