Texas Instruments TSW1266EVM User manual

User's Guide
SLAU484–January 2013
TSW1266EVM Evaluation Module
The TSW1266EVM evaluation module is a wideband, complex receiver reference design and evaluation
platform. The signal chain is ideal for high intermediate frequency (IF) complex feedback applications. The
signal chain has a wideband complex demodulator, the LMH6521 dual-channel, digitally controlled
variable gain amplifier (DVGA), and the ADS5402 12-bit 800-MSPS analog-to-digital converter (ADC). The
TSW1266EVM also includes the LMK04800 dual-PLL clock jitter cleaner and generator to provide an
onboard low-noise clocking solution. A provided software GUI allows for configuration of the ADS5402 and
LMK04800. Either the GUI or an FPGA using the high-speed connector can control the gain of the
LMH6521 DVGA. The EVM mates with the TSW1400 pattern capture and generation card to capture data
from the ADS5402. Then, the High Speed Data Converter Pro software tool can perform signal analysis.
The TSW1266EVM product folder on the TI web site contains the EVM schematic, bill of materials, and
layout files.
Contents
1 Introduction .................................................................................................................. 2
1.1 Overview ............................................................................................................ 2
1.2 Block Diagram ...................................................................................................... 2
2 Software Control ............................................................................................................ 3
2.1 Installation Instructions ............................................................................................ 3
2.2 Software Operation ................................................................................................ 3
3 Basic Test Procedure ....................................................................................................... 9
3.1 TSW1400 Setup .................................................................................................... 9
3.2 Quick-Start Procedure ............................................................................................. 9
3.3 Optional Features and Configurations ......................................................................... 11
List of Figures
1 TSW1266EVM Block Diagram ............................................................................................ 2
2 ADS5402 Control Tab...................................................................................................... 4
3 LMK04800 Main Tab ....................................................................................................... 5
4 LMK04800 Outputs Tab.................................................................................................... 6
5 LMK04800 Advanced Tab ................................................................................................. 7
6 LMH6521 Gain Tab......................................................................................................... 8
7 Send All, Save, Load, and Read All...................................................................................... 9
8 TSW1266 Sample Capture using the TSW1400...................................................................... 11
List of Tables
1 ADS5402 Control Tab Section Descriptions ............................................................................ 4
2 LMK04800 Main Tab Section Descriptions.............................................................................. 5
3 LMK04800 Outputs Tab Section Descriptions .......................................................................... 6
4 LMK04800 Advanced Tab Section Descriptions........................................................................ 7
5 LMH6521 Gain Tab Section Descriptions ............................................................................... 8
6 Send All, Save, Load, and Read All Descriptions ...................................................................... 9
Windows is a registered trademark of Microsoft Corporation.
All other trademarks are the property of their respective owners.
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Demodulator
Clock
Divider
USB/CPLD
LDO’s
SMA
USB
Conn
SMA
SMA
SMA
CLK/REF
IN
6VDC
Data
and Control
I/F
Conn
LMK04808
ADS5402
12
12
LMH6521
8
8
SPI
REF
CLK/REF
OUT
90
I
Q
Introduction www.ti.com
1 Introduction
1.1 Overview
The TSW1266EVM evaluation module is a wideband, complex receiver reference design and evaluation
platform. The signal chain is ideal for high intermediate frequency (IF) complex feedback applications. The
signal chain has a wideband complex demodulator, the LMH6521 dual-channel, digitally controlled
variable gain amplifier (DVGA), and the ADS5402 12-bit 800-MSPS analog-to-digital converter (ADC). The
TSW1266EVM also includes the LMK04800 dual-PLL clock jitter cleaner and generator to provide an
onboard low-noise clocking solution.
The default configuration of the board allows for an RF frequency of 1880 MHz to 2390 MHz and an LO
frequency around 2600 MHz. The IF portion of the board, starting at the output of the demodulator to the
ADC input, is set for a center frequency of 460.8 MHz and a 3-dB bandwidth of 500 MHz. Modification of
both the RF and IF frequency ranges is possible.
A software GUI allows for configuring the ADS5402 and LMK04800. The GUI, or alternatively through the
high-speed connector with an FPGA, can control the gain of the LMH6521 DVGA. The EVM mates with
the TSW1400 pattern capture and generation board to capture data from the ADS5402. The High Speed
Data Converter Pro software tool then can perform signal analysis. The TSW1400 and High Speed Data
Converter Pro greatly simplify the evaluation process by providing the hardware and software necessary
for pattern capture and analysis.
1.2 Block Diagram
Figure 1 shows the block diagram of the TSW1266EVM.
Figure 1. TSW1266EVM Block Diagram
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2 Software Control
This section provides installation instructions and explanations of the TSW1266 GUI.
2.1 Installation Instructions
1. The software can be downloaded from the TSW1266EVM production page on www.ti.com. Find the
page by searching for TSW1266EVM. The software appears under the Related Products section on
the TI Software tab.
2. Extract the files from the zip file named TSW1266 GUI vXpY Installer.zip where XpY represents the
version number.
3. Run setup.exe, and follow the installation prompts.
4. Start the GUI by going to
Start Menu →All Programs →Texas Instruments ADCs →TSW1266 GUI.
5. When plugging the board into the computer for the first time through the USB cable, you are prompted
to install the USB drivers.
• Windows®XP: If Windows XP does not automatically install the drivers, follow the prompts on the
screen to do so. Do not let Windows XP search Microsoft Update for the drivers, but do let
Windows XP install the drivers automatically.
• Windows 7: After installing the TSW1266 GUI, Windows 7 should automatically be able to install
the drivers for the TSW1266EVM with no input from the user.
2.2 Software Operation
The TSW1266 GUI allows the user to program the ADS5402, LMH6521, and LMK04800 for proper
operation. The controls for each device are split between different tabs for a simplified interface. Detailed
descriptions for each tab are below.
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Software Control www.ti.com
2.2.1 ADS5402 Control Tab
Figure 2. ADS5402 Control Tab
Table 1. ADS5402 Control Tab Section Descriptions
Section Description
Reset/Readout Allows software reset of the ADS5402 registers. The device should be reset on startup.
Powerdown Modes Control the Enable pin functionality.
Digital Functions Enable the decimation filters and set the filter type.
Performance Modes Control performance modes of the ADS5402. HP Mode 1 should be on for proper operation.
Data and Clock Outputs Control the LVDS data lines and data format, also control the overrange functionality.
Offset Correction Enable or disable automatic interleaving correction.
Burst Settings Configure the high resolution burst mode. Only applicable to the ADS54T0x family.
Test Patterns Enable and set test patterns to verify the digital interface.
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2.2.2 LMK04800 Main Tab
Figure 3. LMK04800 Main Tab
Table 2. LMK04800 Main Tab Section Descriptions
Section Description
Power Down, Reset, Mode Select Allows for powering down and resetting the part, also controls the mode of the
LMK04800.
CLKin Settings Enabled and select the input clock source, input buffer types, and dividers.
VCO Divider Set the VCO divider to reduce the frequency on the clock distribution path. It is
recommended to use the VCO directly.
OSCout Control power to the OSCin port, also enable and change parameters of the OSCout
pins.
PLL 1 Settings Configure PLL 1 settings when using the dual PLL mode.
PLL 2 Settings Configure PLL 2 settings for both dual and single PLL mode.
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2.2.3 LMK04800 Outputs Tab
Figure 4. LMK04800 Outputs Tab
Table 3. LMK04800 Outputs Tab Section Descriptions
Section Description
Clock Out 0 and 1 Configure Clock Out 0 and 1 outputs. Enable the outputs and set the divider, delay,
and output buffer.
Clock Out 2 and 3 Configure Clock Out 2 and 3 outputs. Enable the outputs and set the divider, delay,
and output buffer.
Clock Out 4 and 5 Configure Clock Out 4 and 5 outputs. Enable the outputs and set the divider, delay,
and output buffer.
Clock Out 6 and 7 Configure Clock Out 6 and 7 outputs. Enable the outputs and set the divider, delay,
and output buffer, also select the source for the output.
Clock Out 8 and 9 Configure Clock Out 8 and 9 outputs. Enable the outputs and set the divider, delay,
and output buffer, also select the source for the output.
Clock Out 10 and 11 Configure Clock Out 10 and 11 outputs. Enable the outputs and set the divider, delay,
and output buffer.
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2.2.4 LMK04800 Advanced Tab
Figure 5. LMK04800 Advanced Tab
Table 4. LMK04800 Advanced Tab Section Descriptions
Section Description
SYNC Enable and configure the sync functionality.
DAC Vtune Rail Detection Enable and control the internal DAC settings.
Status Pins Setup Setup the status pins for various outputs as well as control some miscellaneous
functions.
Holdover Mode Enable and configure holdover mode.
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2.2.5 LMH6521 Gain Tab
Figure 6. LMH6521 Gain Tab
Table 5. LMH6521 Gain Tab Section Descriptions
Section Description
Channel A Set the gain for channel A of the LMH6521.
Channel B Set the gain for channel B of the LMH6521.
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2.2.6 Send All, Save, Load, Read All
Figure 7. Send All, Save, Load, and Read All
Table 6. Send All, Save, Load, and Read All Descriptions
Section Description
Send All Click to send all the registers for all devices. Press a few times if the board does not
seem to be responding correctly.
Save Save the register settings in a text file. Can be reloaded later to set the GUI and
devices to a known state.
Load Load a saved configuration.
Read All This function is not currently enabled on the TSW1265 GUI.
2.2.7 USB Status
The indicator shows the status of the USB connection. The indicator is lit when the USB connection is
valid. If the computer is not connected to the board, click the Reset USB button.
2.2.8 Exit
Click to exit the GUI. Note that the Xin the upper right corner of the window has been disabled to ensure
that the USB connection is closed properly.
3 Basic Test Procedure
3.1 TSW1400 Setup
See the TSW1400 User's Guide (SLWU079) for a more detailed explanation of the TSW1400 setup and
its features. This document assumes that the High Speed Data Converter Pro software and the TSW1400
pattern capture and generation board are both installed and functioning properly. This information can be
found at http://www.ti.com/tool/tsw1400evm.
3.2 Quick-Start Procedure
3.2.1 TSW1400 Data Capture Card
1. Connect a 5-V power supply to connector J12 of the TSW1400. Flip switch SW7 to the ON position.
2. Insert a USB cable into the USB port on the TSW1400. Connect the other end to the PC.
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3.2.2 TSW1266EVM
1. Connect a 6-V power supply to either the banana jacks or the barrel connector. If using the banana
jacks, connect the positive end to J17 and the negative end to J16.
2. Connect a USB cable between the TSW1266 board and the PC.
3. Connect a 10-MHz reference (such as the one from the back of the signal generator) to the CLKIN
SMA connector on the TSW1266. If a 10-MHz reference is not available, it is still possible to use the
onboard clocking solution.
4. Connect an LO source to the SMA connector labeled LO. Set the LO source to 2600 MHz and 0 dBm.
5. Connect an RF source to the SMA connector labeled RF. Because the DVGA may come up with an
unknown gain, set the amplitude of the RF input to –30 dBm to prevent overdriving the ADC on start-
up. Set the frequency to 2140.9 MHz.
6. Connect the TSW1266 to the TSW1400 by connecting J1 on the TSW1266 to the ADC Interface
connector on the bottom of the TSW1400.
3.2.3 TSW1266 GUI
1. Start the TSW1266 GUI by going to
Start Menu →All Programs →Texas Instruments ADCs →TSW1266 GUI.
2. Make sure the green indicator is lit indicating that the TSW1266 board has been successfully
connected to the PC. If not, click the Reset USB button. If it still is not lit, check the USB connection. If
the USB connection is correct, unplug the USB cable, wait five seconds and then plug it back in.
Repeat these steps if necessary.
3. Click on the ADS5402 tab and toggle the RESET switch a few times. Repeat this step for the
LMK04800 tab as well. The LMK04800 and ADS5402 need to be RESET for proper operation.
4. Click the Load button. If a 10-MHz reference was plugged into the CLKIN connector, select the file
named LMK04808_614p4M_Dual_Loop_10M_Ref.txt. If a 10-MHz reference was not available, select
the file named LMK04808_614p4M_Single_Loop.txt. Click Ok. The file is located in the TSW1266 GUI
installation directory in the folder named Configuration Files.
5. Click Send All. At this point, the LED labeled D1 on the TSW1266 should be lit indicating a PLL lock. If
it is not lit, click Send All again.
3.2.4 High Speed Data Converter Pro
1. Start the High Speed Data Convert Pro software tool by going to Start Menu →All Programs →Texas
Instruments ADCs →High Speed Data Converter Pro.
2. When it prompts for the serial number of the board, select the serial number that represents the
TSW1400 that has been connected to the TSW1266. This number should be on a sticker on the
TSW1400.
3. In the Select ADC drop-down box select ADS5402. If it asks to download the firmware select Yes.
Multiple LEDs will light up on the TSW1400 once the firmware has finished downloading.
4. Select Single Tone from the Test Selection drop-down menu.
5. At the bottom left corner, enter 614.4M into the ADC Sampling Rate (Fs) box. Enter 459.1M into the
ADC Input Target Frequency box. Press the Enter key.
6. All boards and software are now set up. Click the Capture button. Once the capture is complete,
adjust the input source amplitude and LMH6521 gain as needed. The LMH6521 gain can be changed
on the LMH6521 Gain tab of the TSW1266 GUI. An example of a –1-dBFS plot is shown in the figure
below.
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