Manuale d’uso / di manutenzione del prodotto DAC3484 del fabbricante Texas Instruments
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User's Guide SLAU336 – March 2011 DAC3484/DAC3482 EVM Contents 1 Introduction .................................................................................................................. 2 1.1 Overview ....................................
19.2MHz TCXO CDCE62005 DAC348X DA T A DA T A _CLK FRAME SYNC P ARITY (L VDS DC Coupled ) DAC_CLK (L VPECL AC Coupled) OSTR_CLK (L VPECL AC Coupled) J20 RF J19 LO FPGA CLK TSW3100 L VPECL DC coupled TRF3703-15 Default TRF3703- 15 Output J7 J6 + _ _ + J10 Ext.
www.ti.com Software Control 2 Software Control 2.1 Installation Instructions • Open the folder named DAC348x_Installer_vxpx (xpx represents the latest version) • Run Setup.
Software Control www.ti.com • FIFO: allows the configuration of the FIFO and FIFO sync sources. • LVDS delay: provides internal delay of either the LVDS DATA or LVDS DATACLK to help meet the input setup/hold time. • Data Routing: provides flexible routing of the A, B, C, and D sample input data to the appropriate digital path.
www.ti.com Software Control 2.2.2 Digital Block Options Figure 4. Digital Block Options ● Interpolation: allows control of the data rate versus DAC sampling rate ratio (i.e. data rate × interpolation = DAC sampling rate). ● Digital Mixer: allows control of the coarse mixer function.
Software Control www.ti.com ● NCO: allows fine mixing of the I/Q signal. The procedure to adjust the NCO mixing frequency are listed below: 1. Enter the DAC sampling frequency in Fsample. 2. Enter the desired mixing frequency in both NCO freq_AB and NCO freq_CD.
www.ti.com Software Control 2.2.4 CDCE62005 Figure 6. CDCE62005 Tab Configured for 4x Interpolation Clock frequency control is determined by register values in the CDCE62005 Control tab. Please refer to the CDCE62005 datasheet for detailed explanations of the register configuration to change the clock frequency.
PC +5V +6 V Ethernet USB J13 J9 DAC348X J14 J18 TSW3100 Pattern Generator J74 J13 Cross-over Ethernet Cable USB Mini-B Cable RF LO Spectrum Analyzer Signal Generator (LO Source) Signal Generator (CLK Source) J9 Basic Test Procedure www.
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.
Basic Test Procedure www.ti.com 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.
www.ti.com Basic Test Procedure (Baseband = 30MHz, NCO = 30MHz with NCO Gain disabled, QMC Gain = 1446, LO = 1900MHz) Figure 9. DAC3484 + TRF3703-15 WCDMA Output 11 SLAU336 – March 2011 DAC3484/DAC3.
Optional Configuration www.ti.com (Baseband = 30MHz, NCO disabled, QMC Gain = 1024, LO = 1930MHz) Figure 10. DAC3484 + TRF3703-15 WCDMA Output 4 Optional Configuration 4.
www.ti.com Optional Configuration Figure 11. Locations of DAC348x to Transformer Output Jumper Locations • Provide the clock input 1228.8 MHz at 1.5Vrms at J9 SMA connector of the DAC3484 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.
Optional Configuration www.ti.com (baseband = 30MHz, NCO = 30MHz with NCO Gain disabled, QMC Gain = 1446) Figure 12. DAC3484 Transformer Coupled Output at 60MHz IF 14 DAC3484/DAC3482 EVM SLAU336 – M.
www.ti.com Optional Configuration (baseband = 30MHz, NCO disabled, QMC Gain = 1024) Figure 13. DAC3484 Transformer Coupled Output at 30MHz IF 4.2 Using the DAC3482 or Configuring DAC3484 in DAC3482 mode The DAC3484 EVM can also be used to evaluate the performance of DAC3482, or configure the DAC3484 in Dual-DAC mode instead of the Quad-DAC mode.
Optional Configuration www.ti.com Figure 14. Locations of the DAC3482 to TRF3703-15 Interface Jumpers The pattern generation is different for DAC3484 EVM when it is used as a Quad-DAC, compared to when it is used as a Dual-DAC. Figure 15 shows a screen shot of TSW3100 GUI for generating a communication signal for DAC3482.
www.ti.com Optional Configuration Figure 15. TSW3100 GUI Configuration for Generating a WCDMA Signal for DAC3482 17 SLAU336 – March 2011 DAC3484/DAC3482 EVM Submit Documentation Feedback © 2011, Te.
Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Texas Instruments DAC3484 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Texas Instruments DAC3484 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Texas Instruments DAC3484 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Texas Instruments DAC3484 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Texas Instruments DAC3484, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Texas Instruments DAC3484.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Texas Instruments DAC3484. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Texas Instruments DAC3484 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
