4 Other Modes of Operation
4.1 Single-Channel RF Mode 2 (2nd Nyquist Zone)
In the DAC GUI, click on the
DAC12DL3200
→
DACA
tab. For single DAC operation in the 2nd Nyquist zone, in
the
DACA_output mode
box, select
RF mode
. With the DAC sampling at 6.4 GHz, and with an input tone at 2.6
GHz, the image will be located at 3.8 GHz in the 2nd Nyquist.
Figure 4-1. 2nd Nyquist Zone Testing
4.2 Dual-Channel Output Mode 0
Complete the following steps to work in dual-channel output mode 0:
1. Change the frequency of the signal generator connected to EXT_DACCLK (SMA J2) to 3.2 GHz.
2. Select the
DAC RESET
switch.
3. Click on the DAC12DL3200EVM
Low Level View
tab.
4. Click on the
File
icon and navigate to “EXT_CLK_Mode0_NRZ_Dual_DAC.cfg” and click the
OK
button to
load the LMK and DAC registers.
This configuration file will setup the DAC to operate in dual-channel mode with outputs available on CHA and
CHB.
5. In the HSDC Pro GUI, in the device drop-down menu, select "DAC12DL3200_MODE0_12b_sync_istrb”. If
the firmware is already loaded, skip the next step.
6. When prompted, click the
Yes
button to update the firmware. After the firmware is downloaded, do the
DxSTR register write mentioned in the
section.
7. Enter "3.2GHz" for the
Data Rate
.
8. In the
I/Q Multitone Generator
window in the lower left of the GUI, enter the following parameters: # of tones
"1", tone center "1GHz" then click the
Create Tones
button.
9. Click the
Send
button in the upper left of the main GUI page to send the test tone to the DAC EVM. There
should now be a 1-GHz output tone on CHA SMA connector J1 and CHB SMA connector J4.
Other Modes of Operation
SBAU374 – MAY 2021
DAC12DL3200 Evaluation Module
17
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