AD9853 Analog Devices, AD9853 Datasheet - Page 8

• Manufacturer Part Number: AD9853
• Description: Programmable Digital OPSK/16-QAM Modulator
• Manufacturer: Analog Devices

AD9853
Single Tone Output Spectrum with +3.3 V Supply, 20.48 MHz REFCLK
Modulated Output Spectrum with 5 V Supply,
–100
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
Figure 7. QPSK, 1.375 Mb/s, A
0
0 START 0Hz
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
START 0Hz
START 0Hz
RBW = 3kHz
VBW = 3kHz
SWT = 22.5s
RF ATT = 10dB
REF LVL = –20dBm
RBW = 3kHz
VBW = 3kHz
SWT = 17s
RF ATT = 30dB
REF LVL = 0dBm
Figure 9. A
Figure 8. A
OUT
8MHz/
OUT
6MHz/
6MHz/
= 42 MHz
= 1 MHz
OUT
RBW = 3kHz
VBW = 3kHz
SWT = 17s
RF ATT = 30dB
REF LVL = 0dBm
= 65 MHz
STOP 80MHz
STOP 60MHz
STOP 60MHz
= 0.25, 27.5 MHz REFCLK
–8–
–100
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
Figure 10. QPSK, 5.5 Mb/s, A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
START 0 Hz
START 0Hz
RBW = 3kHz
VBW = 3kHz
SWT = 22.5s
RF ATT = 10dB
REF LVL = –20dBm
CENTER 40Hz
RBW = 5kHz
VBW = 5kHz
SWT = 8s
RF ATT = 30dB
REF LVL = 0dBm
Figure 11. A
Figure 12. A
(+5 V Supply, 27.5 MHz REFCLK)
8 MHz/
6MHz/
8MHz/
OUT
OUT
= 20 MHz
= 65 MHz
OUT
RBW = 3kHz
VBW = 3kHz
SWT = 17s
RF ATT = 30dB
REF LVL = 0dBm
= 65 MHz
STOP 80 MHz
STOP 60MHz
SPAN 80MHz
REV. C