Datasheet

AD9775
Rev. E | Page 41 of 56
–100
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–40
–30
–20
–10
0
AMPLITUDE (dBm)
0 1020304050
FREQUENCY (MHz)
02858-091
Figure 91. AD9775 Real DAC Output of Complex Input Signal Near
Baseband (Positive Frequencies Only), Interpolation = 4×,
Complex Modulation in AD9775 = +fDAC/4
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
AMPLITUDE (dBm)
750 760 770 780 790 800 810 820 830 840 850
FREQUENCY (MHz)
02858-092
Figure 92. AD9775 Complex Output from
Figure 91,
Now Quadrature Modulated by AD8345 (LO = 800 MHz)
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
AMPLITUDE (dBm)
0 1020304050
FREQUENCY (MHz)
02858-093
Figure 93. AD9775 Real DAC Output of Complex Input Signal Near
Baseband (Negative Frequencies Only), Interpolation = 4×,
Complex Modulation in AD9775 = −f
DAC
/4
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
AMPLITUDE (dBm)
750 760 770 780 790 800 810 820 830 840 850
FREQUENCY (MHz)
02858-094
Figure 94. AD9775 Complex Output from
Figure 93,
Now Quadrature Modulated by AD8345 (LO = 800 MHz)
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
AMPLITUDE (dBm)
0 20 40 60 80 100
FREQUENCY (MHz)
02858-095
Figure 95. AD9775 Real DAC Output of Complex Input Signal Near
Baseband (Positive Frequencies Only), Interpolation = 8×,
Complex Modulation in AD9775 = +f
DAC
/8
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
AMPLITUDE (dBm)
700 720 740 760 780 800 820 840 860 880 900
FREQUENCY (MHz)
02858-096
Figure 96. AD9775 Complex Output from
Figure 95,
Now Quadrature Modulated by AD8345 (LO = 800 MHz)