Quick Start
12
SLAU671A – October 2016 – Revised March 2017
Copyright © 2016–2017, Texas Instruments Incorporated
DAC38RF8xEVM
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
.
