AD9856
Typical Narrowband SFDR Spectral Plots
REF LVL
–5dBm
0
A
RBW
VBW
SWT
100Hz
100Hz
50s
RF ATT
UNIT
20dB
dB
0
REF LVL
–5dBm
RBW
VBW
SWT
100Hz
100Hz
50s
RF ATT
UNIT
20dB
dB
A
–10
–20
–30
1AP
–40
dBm
dBm
–50
–60
–70
–80
–90
–100
CENTER 70.1MHz
10kHz/
SPAN 100kHz
–12
–24
–36
1AP
–48
–60
–72
–84
–96
–100
–120
CENTER 70.1MHz
10kHz/
SPAN 100kHz
Figure 9. 70.1 MHz Narrowband SFDR, 10 MHz External
Clock with REFCLK Multiplier = 20
×
Figure 11. 70.1 MHz Narrowband SFDR, 200 MHz External
Clock with REFCLK Multiplier Disabled
Typical Phase Noise Spectral Plots
REF LVL
0dBm
0
–12
–24
–36
1AP
–48
dBm
dBm
–60
–72
–84
–96
–108
FXD
FXD –2.248dBm
RBW
VBW
SWT
30Hz
30Hz
28s
RF ATT
UNIT
30dB
dB
A
REF LVL
0dBm
0
–12
–24
–36
FXD –2.248dBm
RBW
VBW
SWT
30Hz
30Hz
28s
RF ATT
UNIT
30dB
dB
A
1AP
–48
–60
–72
–84
–96
–100
FXD
–120
CENTER 40.1MHz
500Hz/
SPAN 5kHz
–120
CENTER 40.1MHz
500Hz/
SPAN 5kHz
Figure 10. 40.1 MHz Output, 10 MHz External Clock with
REFCLK Multiplier = 20
×
Figure 12. 40.1 MHz Output, 200 MHz External Clock with
REFCLK Multiplier Disabled
–8–
REV. B
AD [ ANALOG DEVICES ]
