Datasheet

AD9858
Rev. C | Page 11 of 32
–10
0
–20
–30
–40
–50
–60
–70
–80
–90
–170
–100
–110
–120
–130
–140
–150
–160
10 10M1M100k10k
FREQUENCY (Hz)
PHASE NOISE, L(f) (dBc/Hz)
1k100
0
3166-014
Figure 15. Residual Phase Noise, 103 MHz f
OUT
, 1 GHz REFCLK
–10
0
–20
–30
–40
–50
–60
–70
–80
–90
–170
–100
–110
–120
–130
–140
–150
–160
10 10M 100M1M100k10k1k100
FREQUENCY (Hz)
PHASE NOISE, L(f) (dBc/Hz)
0
3166-016
Figure 16. Fractional Divider Loop Residual Phase Noise,
f
IN
= 115 MHz, f
OUT
= 1550 MHz, Loop BW = 50 kHz
–10
0
–20
–30
–40
–50
–60
–70
–80
–90
–100
CENTER 1.55GHz 150kHz/ SPAN 1.5MHz
1kHz
1kHz
3.8s
RF
A
TT
UNIT
10dB
dBm
A
1AP
REF LVL
0dBm
RBW
VBW
SWT
DELT
A
1 [T1]
0.0dB
0.00000000Hz
03166-018
1
Figure 17. Fractional Divider Loop SFDR, f
IN
= 96.9 MHz,
f
OUT
= 1550 MHz, BW = 1.5 MHz
–10
0
–20
–30
–40
–50
–60
–70
–80
–90
–170
–100
–110
–120
–130
–140
–150
–160
10 10M1M100k10k1k100
FREQUENCY (Hz)
PHASE NOISE, L(f) (dBc/Hz)
0
3166-015
Figure 18. Residual Phase Noise, 403 MHz f
OUT
, 1 GHz REFCLK
–10
0
–20
–30
–40
–50
–60
–70
–80
–90
–170
–100
–110
–120
–130
–140
–150
–160
10 10M 100M1M100k10k1k100
FREQUENCY (Hz)
PHASE NOISE, L(f) (dBc/Hz)
03166-019
Figure 19. Translation Loop Residual Phase Nois,e
f
LO
= 1500 MHz, f
OUT
= 1550 MHz, Loop BW = 50 kHz
–10
0
–20
–30
–40
–50
–60
–70
–80
–90
–
100
CENTER 1.55GHz 150kHz/ SPAN 1.5MHz
2kHz
2kHz
940s
RF ATT
UNIT
10dB
dBm
A
1AP
REF LVL
0dBm
RBW
VBW
SWT
DELTA 1 [T1]
–56.76dB
423.84769539kHz
03166-A-021
1
1
Figure 20. Fractional Divider Loop SFDR, f
IN
= 97.3 MHz,
f
OUT
= 1550 MHz, BW = 1.5 MHz