Analog Devices EVAL-AD9959 User Manual page 13

User Guide
EVALUATION BOARD SOFTWARE
CHANNEL OUTPUT CONFIG
The Channel Output Config window configures various output
characteristics of the channel(s). Use the Channel Select tabs to
select which specific channel options to configure. The following
describes the sections that are numerically indexed in
1. Single Tone Setup
Use the Single Tone Setup section to configure the channel output
for the single tone mode of operation (default).
Enter the desired output frequency directly in the Frequency 00
box or double-click the Frequency 00 box to launch the Edit
Output Frequency pop-up box to set the output frequency in the
Frequency box. The output frequency can alternatively be set in
decimal, hex, or binary format by editing the respective boxes in the
Tuning Word Values section (see
Figure 24.
Note that the Phase Offset, Enable ASF, Amplitude Ramp Rate,
Profile Registers, Rising Step Size, Rising Step Interval, Falling
Step Size, and Falling Step Interval boxes all offer the edit option
shown in Figure 24 by double-clicking their respective boxes.
The Frequency 00 box also sets the starting point of the linear
frequency sweep and the first level in frequency modulation (FSK).
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Figure 23. Channel Output Config Window
Figure 23.
Figure 24).
Phase Offset consists of two boxes. In the first box, set the integer
factor (1–999) to increment or decrement the phase offset by. The
default setting of this box is 1, indicating that the phase offset is
incremented/decremented by .022 degrees when pressing the up or
down arrow keys. The value of .022 degrees is derived from this
IntegerFactor ×
equation:
2 14 bits of pℎase resolution − 1
× 360 °
Therefore, entering a factor of 3 in the first box will allow you
to increment/decrement the phase offset by .066 degrees. In the
second box, input the desired phase offset (from 0 degrees to 360
degrees) of the output signal.
The Phase Offset box also represents the starting point of the linear
phase sweep and the first level in phase modulation (PSK).
In order to use the output amplitude scalar, the Enable ASF box
must be checked. In the first box, set the integer factor (1–999)
to increment or decrement the amplitude scale factor. The default
setting of this box is 1, meaning the output amplitude will be scaled
up/down by .00098 when pressing the up or down arrow keys. The
IntegerFactor ×
value of .00098 is derived from this equation:
1
2 10 bits of outputamplitudescalarresolution − 1
In the second box, set the desired output amplitude scale factor
(between 0 and 1) of the output signal, where 1 is equivalent to full
scale.
The Enable ASF box also represents the starting point of the linear
amplitude sweep and the first level in amplitude modulation (ASK).
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