AD9861-50EB Analog Devices Inc, AD9861-50EB Datasheet - Page 20

• Manufacturer Part Number: AD9861-50EB
• Description: BOARD EVAL FOR AD9861-50
• Manufacturer: Analog Devices Inc

Specifications of AD9861-50EB

• Rohs Status: RoHS non-compliant
• Module/board Type: Evaluation Board
• For Use With/related Products: AD9861-50

AD9861
Figure 64 to Figure 69 use the same input data to the Tx path, a 256-carrier OFDM signal over a 23 MHz bandwidth, centered at 23 MHz.
The center four carriers are removed from the signal to observe the in-band intermodulation distortion (IMD) from the DAC output.
Figure 64. AD9861 Tx Path FFT, 256-Carrier (Center Four Carriers Removed)
–100
–120
–130
–140
–100
–120
–130
–140
–100
–120
–130
–110
OFDM Signal over 23 MHz Bandwidth, Centered at 7 MHz, with
–110
–110
–40
–50
–60
–70
–80
–90
–40
–50
–60
–70
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–90
–30
–40
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–90
Figure 65. AD9861 Tx Path FFT, Lower-Band IMD Products of
Figure 66. AD9861 Tx Path FFT of OFDM Signal in Figure 52
10.5
9
0
20 mA Full-Scale Output into 60 Ω Differential Load
10.7
10
14
10.9
20
OFDM Signal in Figure 64
11.1
with 1× Interpolation
30
19
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
11.3
40
11.5
24
50
11.7
60
11.9
29
70
12.1
80
12.3
34
90
12.5
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–100
–110
–120
–130
–140
–100
–110
–120
–130
–140
–100
–110
–120
–130
–40
–50
–60
–70
–80
–90
–40
–50
–60
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–80
–90
–30
–40
–50
–60
–70
–80
–90
Figure 68. AD9861 Tx Path FFT, Upper-Band IMD Products of
Figure 69. AD9861 Tx Path FFT of OFDM Signal in Figure 52
22.6
33.5
Figure 67. AD9861 Tx Path FFT, In-Band IMD Products of
0
33.7
10
22.7
33.9
20
22.8
OFDM Signal in Figure 64
OFDM Signal in Figure 64
34.1
with 4× Interpolation
30
22.9
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
34.3
40
23.0
34.5
50
34.7
23.1
60
34.9
23.2
70
35.1
23.3
80
35.3
90
23.4
35.5