Dac A Digital Control Tab Of The Dac38Rf8X Gui - Texas Instruments DAC38RF8xEVM Series User Manual

Quick Start
Figure 11. DAC A Digital Control Tab of the DAC38RF8x GUI
10. Navigate to the DAC38RF8x → Digital(DAC A) tab as shown in
11. To use the coarse mixer only, check the Mixer enable box for path AB and select the desired coarse
mixer option from the Coarse Mix box for path AB.
To use the NCO and mixer, check both the Mixer enable and NCO enable boxes for path AB. Also
specify the DAC Sampling rate (MHz) and the desired NCO frequency (MHz). Click the UPDATE NCO
button to configure the NCO.
NOTE: For this example:
(a) If using DAC38RF80EVM, DAC38RF87EVM, or DAC38RF82EVM, the sampling rate =
6144 MHz and the NCO Frequency = 2140 MHz.
(b) If using DAC38RF86EVM, the sampling rate = 8847.36 MHz and the NCO Frequency =
2140 MHz.
(c) If using DAC38RF89EVM, the sampling rate = 4915.2 MHz and the NCO Frequency =
2140 MHz.
12. Navigate to the DAC38RF8x tab → Digital (DAC B) and repeat step 11. Set the NCO frequency (MHz)
to 1960 MHz for DAC B.
13. At this point, there should be a tone at 2140.1 MHz at the DAC A output, and another tone at 1960.1
MHz at the DAC B output. These should be visible on a spectrum analyzer connected to the respective
outputs.
The Output sum selector of the DAC can be used to add both signals at 1960.1 MHz and 2141 MHz
and output through DAC A as shown in
12
DAC38RF8xEVM
Figure 12.
Copyright © 2016–2017, Texas Instruments Incorporated
Figure 11.
SLAU671A – October 2016 – Revised March 2017
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