0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0
10
20
30
40
50
FREQUENCY – MHz
Figure 43. AD9775, Real DAC Output of Complex
Input Signal Near Baseband (Positive Frequencies
Only), Interpolation = 4؋, No Modulation in
AD9775
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
750 760 770 780 790 800 810 820 830 840 850
FREQUENCY – MHz
Figure 44. AD9775 Complex Output from
Figure 43, Now Quadrature Modulated by AD8345
(LO = 800 MHz)
AD9775
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0
10
20
30
40
50
FREQUENCY – MHz
Figure 45. AD9775, Real DAC Output of Complex
Input Signal Near Baseband (Positive Frequencies
Only), Interpolation = 4؋, Complex Modulation in
AD9775 = +fDAC/4
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
750 760 770 780 790 800 810 820 830 840 850
FREQUENCY – MHz
Figure 46. AD9775 Complex Output from
Figure 45, Now Quadrature Modulated
by AD8345 (LO = 800 MHz)
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