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User

s Guide

SLWU063F

–

April 2009

–

Revised April 2011

GC5325 System Evaluation Kit

This document outlines the basic steps and functions that are required to ensure the proper operation of
the GC5325 System Evaluation Kit (SEK) system. The GC5325 is a fully integrated crest-factor reduction
(CFR), digital predistortion (DPD) device capable of linearizing a typical base-station power amplifier (PA).
This guide can help users to quickly evaluate the performance of various PAs with varying system
parameters, such as CFR levels and PA input/output power levels before and after the DPD. The GC5325
EVM has two GC5325 devices configured to provide two separate transmit paths and uses one ADC for
feedback that is shared by both GC5325 parts. The block diagram for the GC5325SEK is shown

Figure 1

Contents

Overview

.....................................................................................................................

Hardware Setup

.............................................................................................................

2.1

Power-Up Sequence

...............................................................................................

Software Installation

........................................................................................................

3.1

MATLAB

™

Control Libraries and Tools

.........................................................................

3.2

TSW3100 Software and Drivers

.................................................................................

3.3

DSP-Weuffen USB-to-UHPI Software and Driver

.............................................................

Using the Software

..........................................................................................................

4.1

Starting the GUI Software

.........................................................................................

4.2

Operating the GC5325SEK

.....................................................................................

Other Functions

............................................................................................................

5.1

About

...............................................................................................................

5.2

TSW3100

..........................................................................................................

5.3

Options

.............................................................................................................

5.4

Device

..............................................................................................................

5.5

Port

.................................................................................................................

5.6

GC5325 Registers

................................................................................................

5.7

Signal Setup.

......................................................................................................

5.8

RF Card

............................................................................................................

5.9

DPD Operation

....................................................................................................

5.10

Capture Buffers

...................................................................................................

5.11

Quit and Command/Message window

.........................................................................

Summary

...................................................................................................................

Appendix A

LEDs, Switches, Connectors, and Jumpers

..................................................................

List of Figures

GC5325EVM Block Diagram

..............................................................................................

Location of Local Oscillator Inputs

........................................................................................

Mixer Jumper Definition

....................................................................................................

DOS Window at Start-Up

..................................................................................................

GUI at Start-Up

..............................................................................................................

GUI Configured for UHPI Loading of DSP

...............................................................................

Signal Levels in the GC5325

–

Definition of HR and PAR

...........................................................

MATLAB Vector Saved as .mat File

....................................................................................

Import Wizard Screen

.....................................................................................................

Spectrum

...................................................................................................................

SLWU063F

–

April 2009

–

Revised April 2011

GC5325 System Evaluation Kit

Submit Documentation Feedback

2009

–

2011, Texas Instruments Incorporated

Содержание GC5325

Страница 1: ...Sequence 6 3 Software Installation 7 3 1 MATLAB Control Libraries and Tools 7 3 2 TSW3100 Software and Drivers 7 3 3 DSP Weuffen USB to UHPI Software and Driver 7 4 Using the Software 8 4 1 Starting t...

Страница 2: ...21 21 TXEQ Panel 21 22 GC5325 Register Window 22 23 CFR Setup Window 23 24 CFR Tap files directory 23 25 DPD CFR Configuration Window 24 26 DAC5682Z Offset Correction Window 26 27 DPD Control Window...

Страница 3: ...optional onboard loopback to feedback path The RF section of the board also features a shared feedback path which consists of RF switches control shared feedback DSA and a mixer to convert to IF At th...

Страница 4: ...connector J23 The GC5325EVM converts the 19 Vdc down to the required voltages needed by the board as well as generate the 4 5 5 Vdc for the TSW3100 Connect the provided power supply to connector J7 o...

Страница 5: ...er must make sure the LO source frequency is set to match the configuration of the board To support the two operating frequency ranges the receive path contains two separate RF mixers along with a wid...

Страница 6: ...2 OPEN CLOSED 147 45 MHz 672 MHz DIVIDE BY 2 OPEN OPEN 112 MHz 672 MHz DIVIDE BY 2 CLOSED OPEN 134 4 MHz 672 MHz DIVIDE BY 2 OPEN CLOSED 134 4 MHz 672 MHz DIVIDE BY 3 OPEN OPEN 74 6 MHz 672 MHz DIVID...

Страница 7: ...00 The software driver installation procedure for this product can be found in the TSW3100EVM User s Guide and must be installed now if it has not already been installed The TSW3100EVM User s Guide an...

Страница 8: ...t the installation After the installation is complete click on Finish If the default location was used the software is now loaded under the directory called C GC5325GUI Go to this folder and double cl...

Страница 9: ...2 Select UHPI BOOT located in the upper right side of the GUI 3 Select UHPI in the left side of the GUI 4 Select DSP in the RF Port Options box located in the bottom right hand corner of the GUI The G...

Страница 10: ...age Ratio PAR Headroom HR and TDD for the CFR block Referring to the following diagram Headroom is the clipping threshold relative to full scale for the CFR block and PAR is the RMS level of the input...

Страница 11: ...ex MATLAB vector saved as a mat file Figure 8 or a two column text file Because the GC5325EVMGUI rescales the input signal to the appropriate RMS level the input signal can be floating point and need...

Страница 12: ...er loading The first three are the Spectrum Figure 10 ABS time series Figure 11 and CCDF Figure 12 of the resampled signal Figure 10 Spectrum Figure 11 ABS Time Series 12 GC5325 System Evaluation Kit...

Страница 13: ...ens The Autocfr_gui is a fast simple method to design the CFR cancellation filter based on the spectrum of the input signal The CFR filter has approximately the same spectral mask as the input signal...

Страница 14: ...input signal If unchecked the entire input signal spectrum is used It is recommended to first get the basic CFR filter spectral shape as desired then uncheck Fast Design and regenerate This removes so...

Страница 15: ...rd the three LEDs that indicate the status of the CDCM7005 see Figure 15 should now all be illuminated Figure 15 CDCM7005 Status LEDs 15 SLWU063F April 2009 Revised April 2011 GC5325 System Evaluation...

Страница 16: ...are set properly 2 Make sure the USB cable is installed between the USB to UHPI board and the host PC 3 Make sure the DSP Weuffen drivers are installed properly 4 Make sure the USB to UHPI board is in...

Страница 17: ...rd and the host with power applied to the board If these LEDs are not on try cycling the TSW3100 power and rebooting the host computer Other things to try are the following 1 Disconnect the USB Ethern...

Страница 18: ...disabled the channel is transmitting through this SMA and the LED is off On power up both channels come up in loop back mode to prevent from possibly overdriving external PAs For Channel 1 LED D5 is i...

Страница 19: ...ce DPD starts the system continues to adapt until the Hold DPD command is issued All buttons except for Hold DPD and Re initialize DPD are disabled To do any action such as capturing buffers reloading...

Страница 20: ...ing across SMA connector J18 TX1_OUT and that the feedback path is now set up for RX1_IN For this case the feedback signal must be connected to SMA connector J28 RX1_IN 3 When both channels are drivin...

Страница 21: ...to open a new window Then click on the TXEQ Plot button to generate the plot To invert the feedback signal spectrum click on the invert_eq_fb_flag box After doing this the user must re initialize DPD...

Страница 22: ...ands but only on one line The following example will open two figures and displays the number 1 followed by 2 The content of myScriptExample txt e for index 1 2 figure index disp num2str index end Fig...

Страница 23: ...such files under the C GC5325GUI cfr_tap_files directory Choose a custom taps file to be loaded for the CFR coefficients When the Import Wizard opens click on Next then Finish PAR This box specifies t...

Страница 24: ...the DSP will use to calculate the CFR filter coefficients based on carrier prototype filters To enable the DSP CFR CONF button the user must first click on the Expert Mode option This is different fro...

Страница 25: ...he maximum attenuation RX atten This box is used to set the attenuation value of the RX attenuator The range is from 0 to 31 75 using increments of 0 25 with 0 being minimum attenuation and 31 75 the...

Страница 26: ...for each although typically only a value of 9 or less is needed Lowering the value will speed up the adaption time of the algorithm In most cases the Model and Z 0 values should be the same and the Z...

Страница 27: ...rs AM PM This button makes either a PA AM AM amplitude vs amplitude plot as shown in Figure 28 or a AM PM plot amplitude vs phase The blue curve was taken before DPD The green and red ones were taken...

Страница 28: ...SP and SPI bus is currently processing Commands can also be issued by entering the appropriate text in this widow and clicking on the Eval button This feature is not recommend to be used The Clear but...

Страница 29: ...OS output clock See TSW3100 User s All set to Open Guide for more information SW1 Board main power switch ON SW5 External 1 8 Vdc and 3 3 VDC output supply Not used with the GC5325SEK OFF S9 FPGA Conf...

Страница 30: ...emove for 1 2 external VCXO operation SJP14 GC5325 clock buffer control 2 3 SJP15 GC5325 clock buffer control 2 3 JP1 10MHz REF POWER Set to pins 2 3 when using external reference source 1 2 JP2 10MHz...

Страница 31: ...de master clock to the TSW3100 J18 CH1 TX Output J36 CH1 TX output test connector after amplifier and attenuator J39 CH1 loopback test connector J28 TX1 feedback input connector RX1_IN J21 FB RF test...

Страница 32: ...e VCXO may be converted to external if desired by moving shunts on two jumpers to power off the onboard VCXO Remove shunt on SJP16 and SJP17 Add shunt on SJP16 pins 1 2 and shunt SJP17 pins 2 3 An 8 d...

Страница 33: ...t This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer o...

Страница 34: ...orized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parti...

Страница 35: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments GC5325SEK...

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