-180
-160
-140
-120
-100
-80
100
1000
10000
100000
1000000
10000000
P
h
a
s
e
N
o
is
e
(
d
B
c
/H
z
)
Offset (Hz)
70.1 MHz, CP gain = 16x, FM =3, Dithering Disabled
70.1 MHz, CP gain = 16x, FM =3, Weak Dithering
70.1 MHz, CP gain = 16x, FM =3, Strong Dithering
Typical Phase Noise Performance Plots
15
SNAU114D – March 2006 – Revised June 2016
Copyright © 2006–2016, Texas Instruments Incorporated
Using the LMX2485E & LMX2487E Evaluation Board
Figure 14. LMK2485E Impact of Dithering
