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Analog Devices EVAL-AD9959 User Manual page 20

Evaluation board for 4-channel 500 msps dds with 10-bit dacs

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User Guide
EVALUATION BOARD SOFTWARE
In the Channel Control window
Type box. As discussed in the Channel Constraint Guidelines section of the
selected channel, all other channels are available only for the single tone mode of operation.
In the Channel Output Config window
loaded, profile pins P1 and P3 are pressed as shown in the Profile and RURD Pin Control Section. In 16-level modulation, P3 is the LSB and
P0 is the MSB. This explains why when this setup file is loaded, an output of 18 MHz is shown because 0101 binary = 5, and Profile Register
05 contains 18 MHz as its output. If no profile pins are selected, then the output frequency is equivalent to the value entered in the Frequency
00 box (3 MHz in this setup). If all profile pins are pressed, the output frequency is equal to 48 MHz, the contents of Profile Register 15 (1111
binary).
analog.com
(Figure
42), Channel 2 has Frequency selected as its modulation output as shown in the Modulation Output
(Figure
43), Channel 2 has a frequency output of 3 MHz (Frequency 00 box). When this setup file is
Figure 41.
AD9959
data sheet, when performing 16-level modulation on a
Figure 42.
EVAL-AD9959
Rev. A | 20 of 27

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