AD9856
Typical Modulated Output Spectral Plots
REF LVL
–25dBm
0
–8
–16
–24
–32
dBm
dBm
–40
–48
–56
–64
–72
–80
START 0Hz
1AP
RBW
VBW
SWT
10kHz
1kHz
12.5s
RF ATT 10dB
Unit
dBm
REF LVL
–25dBm
0
–8
–16
–24
–32
–40
–48
–56
–64
–72
–80
5MHz/
STOP 50MHz
START 0Hz
8MHz/
STOP 80MHz
1AP
RBW
VBW
SWT
10kHz
1kHz
20s
RF ATT
Unit
10dB
dBm
Figure 1. QPSK at 42 MHz and 2.56 MS/s; 10.24 MHz
External Clock with REFCLK Multiplier = 12, CIC = 3,
HB3 On, 2
×
Data
Figure 3. 16-QAM at 65 MHz and 2.56 MS/s; 10.24 MHz
External Clock with REFCLK Multiplier = 18, CIC = 9,
HB3 Off, 2
×
Data
REF LVL
–30dBm
0
–8
–16
–24
–32
dBm
RBW
VBW
SWT
10kHz
1kHz
10s
RF ATT
UNIT
10dB
dBm
0
–8
–16
1AP
–24
–32
dBm
–40
–48
–56
–64
–72
REF LVL
–30dBm
RBW
VBW
SWT
10kHz
1kHz
12.5s
RF ATT
UNIT
10dB
dBm
1AP
–40
–48
–56
–64
–72
–80
START 0Hz
4MHz/
STOP 40MHz
–80
START 0Hz
5MHz/
STOP 50MHz
Figure 2. 64-QAM at 28 MHz and 6 MS/s; 36 MHz External
Clock with REFCLK Multiplier = 4, CIC = 2, HB3 Off, 3
×
Data
Figure 4. 256-QAM at 38 MHz and 6 MS/s; 48 MHz External
Clock with REFCLK Multiplier = 4, CIC = 2, HB3 Off, 4
×
Data
–6–
REV. B
AD [ ANALOG DEVICES ]
