Analog Devices EVAL-AD9959 User Manual page 19

User Guide
EVALUATION BOARD SOFTWARE
controls Channel 1, P2 controls Channel 2, and P3 controls Channel 3. If a profile pin is deselected, the associated channel's output will return
to 0 MHz. To return to full scale, re-press the profile pin that triggers the RU/RD operation.
Modulation Mode
Open the Modulation Mode folder to access the modulation mode of operation example setup files. Once this folder is opened you will be
presented with the window shown in
For frequency modulation (FSK), open the Frequency folder; for phase modulation (PSK), open the Phase folder; and for amplitude modulation
(ASK), open the Amplitude folder. In these folders, all setup files are indexed by their level (2, 4, 8, or 16-level). This section discusses the
CH2_@3 MHz increments.stp file found in the Frequency folder under the 16-level folder.
The Chip Level Control window
modulation-no RU/RD is being performed. Notice the Level box located in the Modulation Configuration section. The PPC Bit pattern in
the Profile Pin Config subsection of the Modulation Configuration is <010>. Referring to the table in the 16-Level Modulation-No RU/RD
section of the AD9959 data sheet, we see that this bit pattern sets up 16-level modulation on Channel 2.
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Figure 40.
(Figure 41) from this particular setup shows that a 500 MHz System Clock is running, and that a 16-level
Figure 39.
Figure 40.
EVAL-AD9959
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