LAB Sessions High Speed Data Converter University Updated Q1 2012 – Jim Seton LAB Sessions High Speed Data Converter University Updated Q1 2012 – Jim Seton

LAB Sessions

High Speed Data Converter UniversityUpdated Q1 2012 – Jim Seton

LAB Sessions

High Speed Data Converter UniversityUpdated Q1 2012 – Jim Seton

TI Confidential – NDA Restrictions

TSW1400 + TSW3085

TSW1265 + TSW1400

- RF Transmitter Reference Design

- Pattern Generator

- Dual Receiver Reference Design

- Data Capture


TSW1400 (Pattern Generator Mode)

TSW3085

TSW1400 (Capture Mode)

TSW1265

TX RF Output

4


PC

+5V

USB USB

J5 J12

TSW3085

J13

J8

TSW1400Pattern

Generator

J74 J1

US

B M

ini-B

Cab

le

TSW3065LO Source

LOJ4

TXRFJ7

J11

LO

+6V

USB Mini-BCable

TSW1400 & TSW3085 Setup Block Diagram


TSW1400 + TSW1265 Setup Block Diagram

5

5V

6V 6V

5V inUSBJ1

USB CLKIN1

RFIN-A

LO26V in

TSW1400

TSW1265

Clock Source

RF Source Input (TSW3085)

TSW3065

REF Out

REF In

PC

USB USB

6V in

ADC


Software LoadingThe latest version of the GUI software files and User’s Guide manual can be found on

the TI website by entering “TSW1400EVM” in the search parameter as shown below.


TSW1400 Software Loading

• Unzipping the software package will generate a folder called “slwc107b.zip.

• Under the unzipped folder called SLWC107 will be a “setup.bat file, a folder called “EVM GUI”

and another folder called “FTDI”. The EVM GUI folder contains the GUI code and the other folder contains the drivers for the USB interface.

• If running the software for the first time, run the file called “setup.bat”. This loads the FTDI drivers followed by installing the High Speed Data Converter Pro GUI software.

• Follow the on-screen instructions during installation.

• Once installed, the GUI executable will reside in the following directory:

C:\Program Files\Texas Instruments\High Speed Data Converter Pro

• Click on “High Speed Data Converter Pro.exe to start the GUI.



• Unzip the TSW308x software package.

• Run the file called “setup.bat”.



C:\Program Files\Texas Instruments\TSW308x

• Click on “TSW308x.exe to start the GUI.


TSW1400 + TSW3085 Bring Up

• Power up the TSW3085. • Power up the TSW1400 EVM.• Connect power to TSW3065 (USB cable).• Start up the TSW1400 GUI.• Connect the GUI to the TSW1400EVM.• “No Firmware. Please select a device to load

firmware into the board” message will appear. Click “OK”.

• Start up the TSW308x GUI.


Program TSW3085

• Change the Device Selection setting at the top to be the “TSW3085 EVM Software Control”.

• Click on “Load Regs” button at the top.• Select file called “LTE_INT2x_10MHz_614p4M.txt”. • Click on “Send All” button.• The LOCK LED on the TSW3085 will turn green

confirming the TSW3085EVM is programmed.


Program TSW1400

• On the TSW1400 GUI, select “DAC” (Top right of GUI) to change the mode of operation to pattern generation.

• Select the DAC3482 in the drop down menu.

• The following Firmware dialog message will show up. Click yes to load the firmware.


Program TSW1400

• When the firmware is finished downloading, set the Data Rate to “307.2M” and the DAC Option to “2’s Complement”.

• Click the “Load File to transfer” button.• Select the file called

“LTE_Freq_30MHz_Amp_0dB_BW_20.003MHz_307.2MSPS.tsw.• Change the Window selection from Rectangular to Hanning.• Select the “Send” button to the left of Load File to transfer the data

into TSW1400.


On the DAC GUI, click on the SIF Sync button twice to

synchronize the DAC.

The TSW1400 should be loaded with the correct pattern and the TSW1400 GUI will look like the image on the next slide.


TSW1400 GUI with loaded data


TSW3085 Output

• The TSW3085 output will look as shown in the next slide if connected to a Spectrum Analyzer, centered around 2.13 GHz.


TSW3085 Output


Powering TSW1400, TSW1265, TSW3065

• Power up TSW1400 EVM (5V wall plug)• Power up TSW1265 EVM (6V wall plug)• Power up TSW3065 EVM (USB cable)

17

TSW1265 Software



• Unzipping the software package will generate a folder called “slwc105b.zip.

• Under the unzipped folder called SLWC105 run the “setup.exe” file.



C:\Program Files\Texas Instruments ADCs\TSW1265 GUI

• Click on “TSW1265 GUI.exe to start the GUI.

TI Confidential – NDA Restrictions20

Configure the TSW1265• Open the TSW1265 GUI located in Start Menu>Program Files>Texas Instruments ADCs• Verify that the GUI is connected to the USB port• Select “Load” and navigate to the “Configuration Files” folder in the TSW1265 GUI

installation directory. Select “250MHz_onboard_clock.txt” and click “Ok”• Push the “Send All” button a couple of times to make sure all the registers are loaded.

The LED labeled “LMK LOCK” (D3) on the TSW 1265 will light up when the clock is configured correctly.


21

Configure TSW3065 for LO• Make sure both silver toggle switches are set to 6V and Internal• The DIP switches on the side can be set in the following

configurations

• Set the DIP switch settings so that only the D4 LED is lit (1960MHz). On the TSW3065, the DIP switch being UP turns the LED off, down turns the LED on.

• Connect “LO Diff P Out” on the TSW3065 to the LO2 input on the TSW1265. This may be shared with the TSW3085 demo.


High Speed Data Converter Pro Configuration

• Open “High Speed Data Converter Pro” by going toStart>All Programs>Texas Instruments ADCs

• The following prompt will ask you to select the serial number of the TSW1400 connected. This should be printed on the TSW1400 hardware. Select the correct serial number and click “ok”.



• If a message shown below appears when connecting to the TSW1400 board, then proceed by clicking OK again.

• Make sure the ADC tab is selected at the top, as shown on the next page.





• Now select ADS4249 in the drop down menu highlighted by the red box in the image below. After doing so, the Firmware dialog message will show up. Click yes to load the firmware.


TSW1400 GUI Configuration

• When the firmware is finished downloading, select “Single Tone” from the test selection menu. Choose 65356 as your record length, set the sampling rate to “250M” and the input target frequency to “180M”. Hit enter after entering the target frequency to have the GUI calculate the coherent input frequency.

• Select “Channel 2/2” from the drop down box above the plot window.

• Select the “Hanning” window from the drop down box.


TX/RX Loop Back

• Now connect the TSW3085 transmitter demo to the TSW1265 receiver demo by connecting the TX OUT port of the TSW3085 to the RFIN A port on the TSW1265.

• The TSW3085 should already be transmitting a 20-MHz wide LTE signal.

• Go to the TSW1265 GUI and click on the “LMH6521 Gain” tab. Set the gain of Channel A to 3 dB. Be careful not to set the gain too high to avoid damaging the ADC.

• Click “capture” on the TSW1400 GUI that is connected to the TSW1265.

• The result is shown on the next page.

• Use the draggable cursors to verify the signal is approximately 20 MHz wide.


20-MHz LTE Result

Documents

LAB Sessions High Speed Data Converter University Updated Q1 2012 – Jim Seton LAB Sessions High Speed Data Converter University Updated Q1 2012 – Jim Seton