Texas Instruments DAC3482, Руководство пользователя, Страница: 9 / 19

www.ti.com
Basic Test Procedure
3.2 Test Set-Up Connection
● TSW3100 Pattern Generator
1. Connect 5V power supply to J9, 5V_IN jack of the TSW3100 EVM.
2. Connect the PC’s Ethernet port to J13, Ethernet port of the TSW3100. The cable should be a
standard cross-over Cat5e Ethernet cable.
● DAC3484 EVM
1. Connect J13 connector of DAC348x EVM to J74 connector of TSW3100 EVM
2. Connect 6V to the J18, Power In jack of the DAC3484 EVM.
3. Connect PC’s USB port to J14 USB port of the DAC3484 EVM. The cable should be a
standard A to mini-B connector cable.
4. Provide a 1.5Vrms, 1.25GHz max Clock at J9, CLKIN SMA port of DAC3484 EVM.
5. Provide 12dBm max, 350MHz to 4GHz LO source at J19 or J22 port of the DAC3484 EVM.
This is to provide the LO source to the TRF3703-15 modulators.
6. Connect the RF output port of J20 or J21 to the spectrum analyzer.
● DAC3482 EVM
1. Repeat steps 1 to 4 of DAC3484 EVM connection
2. Provide 12dBm max, 350MHz to 4GHz LO source at J24 port of the DAC3484 EVM. This is to
provide the LO source to the TRF3703-15 modulators.
3. Connect the RF output port of J23 to the spectrum analyzer.
● DAC3484/2 EVM jumpers: make sure the following jumpers are at their default setting
1. JP6 on pin {1,2}
2. JP4 on pin {2,3}
3. JP5 on pin {1,2}
4. JP2 on pin {1,2}
5. JP3 on pin {2,3}
6. JP1 and JP8 should be installed
7. JP12 normally can be set in {1-2} position. If -5V supply is used to bias the DAC to modulator
interface, then J12 needs to be in {2-3} position prior to the 6V power supply connection. Once
the 6V power supply is connected, then J12 can be in {1-2} position to start the -5V sequence.
3.3 TSW3100 Quick Start Operation
Reference the TSW3100 User’s Guide for more detailed explanations of the TSW3100 set-up and
operation. This document assumes the TSW3100 software is installed and functioning properly. The
DAC348x needs TSW3100 operating software version 2.5 or higher with TSW3100 board Rev D (or
higher).
CommsSignalPattern Setup from Default Configuration (WCDMA)
• Change Interpolation value to DAC Clock Rate / Interpolation / 3.84 (i.e. 1228.8 / 4/ 3.84 = 80)
• Enter desired Offset Frequency (i.e. 30 MHz) for each desired carrier
• Select the 16b QDAC output button
• Check the “LOAD and Run” box
• Press the green “Create” button
9 SLAU336 – March 2011 DAC3484/DAC3482 EVM
Submit Documentation Feedback
© 2011, Texas Instruments Incorporated