ADA4320-1

Rev. 0 | Page 9 of 16

–10

–80

–70

–60

–50

–40

–30

–20

060

54

48

42

36

30

24

18

12

6

GAIN CODE

TXEN = 1, ALL CURRENT LEVELS

TXEN = 0

Figure 11. Noise Power vs. Gain Code

0

–30

–25

–20

–15

–10

–5

585

80

75

70

65

60

55

50

45

40

35

30

25

20

15

10

FREQUENCY (MHz)

SLEEP

TX DISABLE

TX ENABLE

Figure 12. Output Return Loss (S22) vs. Frequency

–61

–62

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–64

–65

–66

–67

–68

585

75

65

55

45

35

25

15

FREQUENCY (MHz)

CURRENT LEVEL 0

CURRENT LEVEL 1

CURRENT LEVEL 2

CURRENT LEVEL 3

SINGLE QPSK CHANNEL

OUTPUT LEVEL = 61dBmV

GAIN CODE 60 (MAXIMUM)

CHANNEL WIDTH = 6.4MHz

ADJACENT CHANNEL WIDTH = 6.4MHz

Figure 13. ACPR vs. Frequency for Single QPSK Channel

80

20

30

40

50

60

70

06

54

48

42

36

30

24

18

12

6

GAIN CODE

0

CURRENT LEVEL 3

CURRENT LEVEL 0

Figure 14. Output 1 dB Compression Point vs. Gain Code

–40

–80

–75

–70

–65

–60

–55

–50

–45

80

0

10

20

30

40

50

60

70

06

54

48

42

36

30

24

18

12

6

GAIN CODE

OUTPUT

LEVEL

ACPR

0

SINGLE QPSK CHANNEL

INPUT LEVEL = 29dBmV

CURRENT LEVEL 3

CHANNEL WIDTH = 6.4MHz

DRIVEN CHANNEL CENTER = 42MHz

ADJACENT CHANNEL WIDTH = 6.4MHz

ADJACENT CHANNEL CENTER = 48.4MHz

Figure 15. ACPR and Output Level vs. Gain Code

–52

–54

–56

–58

–60

–62

–64

–66

58

75

65

55

45

35

25

15

FREQUENCY (MHz)

5

CURRENT LEVEL 0

CURRENT LEVEL 1

CURRENT LEVEL 2

CURRENT LEVEL 3

4× QAM64 CHANNELS (UNCORRELATED)

OUTPUT LEVEL = 53dBmV/CHANNEL

GAIN CODE 60 (MAXIMUM)

CHANNEL WIDTH = 1.6MHz

ADJACENT CHANNEL WIDTH = 1.6MHz

Figure 16. ACPR vs. Frequency for 4× QAM64 Channels