AD9863-50EB AD [Analog Devices], AD9863-50EB Datasheet - Page 15

• Manufacturer Part Number: AD9863-50EB
• Manufacturer: AD [Analog Devices]

Figure 34 to Figure 39 use the same input data to the Tx path, a 256-carrier OFDM signal over a 1.75 MHz bandwidth, centered at 7 MHz.
The four center carriers are removed from the signal to observe the in-band intermodulation distortion (IMD) from the DAC output.
Figure 34. AD9863 Tx Path FFT, 256-Carrier (Four Center Carriers Removed)
OFDM Signal over 1.75 MHz Bandwidth, Centered at 7 MHz, with
–100
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Figure 35. AD9863 Tx Path FFT, Lower-Band IMD Products of
Figure 36. AD9863 Tx Path FFT of OFDM Signal in Figure 34,
6.06
6.0
0
20 mA Full-Scale Output into 60 Ω Differential Load
6.2
6.08
5
6.4
OFDM Signal in Figure 34
with 1× Interpolation
6.6
6.10
10
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
6.8
6.12
7.0
15
7.2
6.14
7.4
20
6.16
7.6
25
7.8
6.18
8.0
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Figure 38. AD9863 Tx Path FFT, Upper-Band IMD Products of
Figure 39. AD9863 Tx Path FFT of OFDM Signal in Figure 34,
6.97
7.81
Figure 37. AD9863 Tx Path FFT, In-Band IMD Products of
0
7.83
6.98
5
OFDM Signal in Figure 34
OFDM Signal in Figure 34
7.85
with 2× Interpolation
6.99
10
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
7.87
7.00
15
7.89
7.01
20
7.91
7.02
25
7.93
AD9863
7.03