ada4320-1 Analog Devices, Inc., ada4320-1 Datasheet - Page 9

• Manufacturer Part Number: ada4320-1
• Description: High Power, Low Distortion Upstream Catv Line Driver Ada4320-1
• Manufacturer: Analog Devices, Inc.

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0
Figure 13. ACPR vs. Frequency for Single QPSK Channel
0
5
5
SINGLE QPSK CHANNEL
OUTPUT LEVEL = 61dBmV
GAIN CODE 60 (MAXIMUM)
CHANNEL WIDTH = 6.4MHz
ADJACENT CHANNEL WIDTH = 6.4MHz
Figure 12. Output Return Loss (S22) vs. Frequency
10
6
SLEEP
TX DISABLE
TX ENABLE
TXEN = 1, ALL CURRENT LEVELS
TXEN = 0
15
15
Figure 11. Noise Power vs. Gain Code
20
12
25
25
18
30
FREQUENCY (MHz)
FREQUENCY (MHz)
35
35
24
GAIN CODE
40
30
45
45
50
36
55
55
CURRENT LEVEL 0
CURRENT LEVEL 1
CURRENT LEVEL 2
CURRENT LEVEL 3
60
42
65
65
48
70
75
75
54
80
60
85
85
Rev. 0 | Page 9 of 16
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0
80
70
60
50
40
30
20
Figure 14. Output 1 dB Compression Point vs. Gain Code
Figure 16. ACPR vs. Frequency for 4× QAM64 Channels
0
5
4× QAM64 CHANNELS (UNCORRELATED)
OUTPUT LEVEL = 53dBmV/CHANNEL
GAIN CODE 60 (MAXIMUM)
CHANNEL WIDTH = 1.6MHz
ADJACENT CHANNEL WIDTH = 1.6MHz
6
OUTPUT
Figure 15. ACPR and Output Level vs. Gain Code
ACPR
LEVEL
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
CURRENT LEVEL 3
CURRENT LEVEL 0
6
CURRENT LEVEL 0
CURRENT LEVEL 1
CURRENT LEVEL 2
CURRENT LEVEL 3
15
12
12
18
25
18
24
FREQUENCY (MHz)
GAIN CODE
35
24
GAIN CODE
30
30
45
36
36
55
42
42
48
65
ADA4320-1
48
54
75
54
6
0
80
70
60
50
40
30
20
10
0
6
8
0
5