Texas Instruments DAC3484 사용자 설명서
Basic Test Procedure
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Figure 8. TSW3100 CommsSignalPattern (WCDMA) Programming GUI
3.4
DAC348x Software Quick Start Guide
•
Provide the clock input 1228.8 MHz at 1.5Vrms at J9 SMA connector of the DAC3484 EVM.
•
Provide the LO source of 1.9GHz (12dBm max) at either J19 or J22 SMA connector of the DAC3484
EVM.
EVM.
–
Provide the LO source to J24 SMA connector for the DAC3482 EVM
•
Turn on power to the board and press the reset button on the EVM
•
Press the “Reset USB Port” button in GUI and verify USB communication.
•
Switch to the INPUT tab of GUI
•
Click “LOAD REGS”, browse to the installation folder and load example file
DAC3484_FDAC_1228p8MHz_4xint_NCO_30MHz_QMCon.txt. This file contains settings for 4x
interpolation with the DAC3484 running at 1228.8MSPS. Load this file and wait a couple of seconds for
the settings to go into effect.
DAC3484_FDAC_1228p8MHz_4xint_NCO_30MHz_QMCon.txt. This file contains settings for 4x
interpolation with the DAC3484 running at 1228.8MSPS. Load this file and wait a couple of seconds for
the settings to go into effect.
•
Verify the spectrum using the Spectrum Analyzer at the two RF outputs of the DAC EVM (J20 and
J21).
J21).
•
(Toggle the SIF SYNC button to sync the appropriate digital blocks, if example file with NCO
setting is used)
setting is used)
10
DAC3484/DAC3482 EVM
SLAU336 – March 2011
© 2011, Texas Instruments Incorporated