National Instruments USRP-2900 User manual

GETTING STARTED GUIDE
USRP-2900/2901
Universal Software Radio Peripheral
This document explains how to install, configure, and test the following USRP devices:
• USRP-2900 Software Defined Radio (USRP-2900)
• USRP-2901 Software Defined Radio (USRP-2901)
Contents
Electromagnetic Compatibility Guidelines...............................................................................1
Verifying the System Requirements..........................................................................................2
Unpacking the Kit..................................................................................................................... 2
Verifying the Kit Contents................................................................................................ 3
Preparing the Environment....................................................................................................... 4
Installing the Software.............................................................................................................. 4
Installing USRP-2900/2901 Devices........................................................................................ 5
Configuring USRP-2900/2901 Devices....................................................................................5
Confirming USB Connection............................................................................................5
Changing the Device ID....................................................................................................6
Programming the USRP-2900/2901......................................................................................... 8
NI-USRP Instrument Driver............................................................................................. 8
NI-USRP Examples.......................................................................................................... 8
Verifying the Device Connection (Optional).................................................................... 8
Troubleshooting........................................................................................................................ 9
Why Doesn't the USRP Device Appear in MAX?............................................................9
Why Doesn't the USRP Device Appear in the NI-USRP Configuration Utility?.............9
Front Panels and Connectors.....................................................................................................9
Direct Connections to the USRP-2900/2901.................................................................... 9
USRP-2900 Connectors and LEDs................................................................................. 10
USRP-2901 Connectors and LEDs................................................................................. 12
Worldwide Support and Services............................................................................................ 14
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory requirements and limits for
electromagnetic compatibility (EMC) stated in the product specifications. These requirements
and limits provide reasonable protection against harmful interference when the product is
operated in the intended operational electromagnetic environment.

This product is intended for use in industrial locations. However, harmful interference may
occur in some installations, when the product is connected to a peripheral device or test object,
or if the product is used in residential or commercial areas. To minimize interference with
radio and television reception and prevent unacceptable performance degradation, install and
use this product in strict accordance with the instructions in the product documentation.
Furthermore, any changes or modifications to the product not expressly approved by National
Instruments could void your authority to operate it under your local regulatory rules.
Caution To ensure the specified EMC performance, operate this product only with
shielded cables and accessories.
Caution To ensure the specified EMC performance, the length of all I/O cables
except those connected to the Ethernet and GPS antenna ports must be no longer
than 3 m (10 ft).
Caution This product is not approved or licensed for transmission over the air
using an antenna. As a result, operating this product with an antenna may violate
local laws. Ensure that you are in compliance with all local laws before operating
this product with an antenna.
Verifying the System Requirements
To use the NI-USRP instrument driver, your system must meet certain requirements.
Refer to the product readme, which is available on the driver software media or online at
ni.com/manuals, for more information about minimum system requirements, recommended
system, and supported application development environments (ADEs).
Unpacking the Kit
Caution To prevent electrostatic discharge (ESD) from damaging the device,
ground yourself using a grounding strap or by holding a grounded object, such as
your computer chassis.
1. Touch the antistatic package to a metal part of the computer chassis.
2. Remove the device from the package and inspect the device for loose components or any
other sign of damage.
Caution Never touch the exposed pins of connectors.
Note Do not install a device if it appears damaged in any way.
3. Unpack any other items and documentation from the kit.
Store the device in the antistatic package when the device is not in use.
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Verifying the Kit Contents
6
54
31 2
TXOUTPUT MAX +20 dBm, RX INPUT MAX -15 dBm, ALL RF PORTS 50 Ω
RF 0
TX1 RX1 RX2 TX1 RX1
RX2
RF 1
NI USRP-2901
70 MHz–6 GHz
Designedby Ettus Research
1. USRP-2900/2901 Device
2. AC/DC Power Supply (Included Only in
USRP-2901 Kits)
3. USB 3.0 Cable
4. SMA (m)-to-SMA (m) Cable
5. 30 dB SMA Attenuator
6. Driver Software Media
7. USRP-2900/2901 Getting Started Guide (This
Document)
Note The driver software media installs the NI-USRP driver software and
electronic documentation, including the NI-USRP Help, the NI-USRP Readme, and
device specifications. After installation, you can access USRP-2900/2901
documentation at Start»All Programs»National Instruments»NI-USRP»
Documentation.
Other Required Items
In addition to the kit contents, you must provide the following additional items:
• Computer with available USB 3.0 or USB 2.0 interface.
Caution This product is not approved or licensed for transmission over the air
using an antenna. As a result, operating this product with an antenna may violate
local laws. Ensure that you are in compliance with all local laws before operating
this product with an antenna.
USRP-2900/2901 Getting Started Guide | © National Instruments | 3

Optional Items
• Additional SMA (m)-to-SMA (m) cables to connect both channels with external devices
or to use the REF IN and PPS IN signals
• 6 V, 3 A external DC power connector
Preparing the Environment
Ensure that the environment you are using the USRP-2900/2901 in meets the following
specifications.
Ambient temperature range 0 °C to 55 °C
Operating temperature 23 °C ± 5 °C
Operating humidity 10% to 90% relative humidity, noncondensing
Pollution Degree 2
Maximum altitude 2,000 m
Indoor use only.
Caution Do not operate the USRP-2900/2901 in a manner not specified in this
document. Product misuse can result in a hazard. You can compromise the safety
protection built into the product if the product is damaged in any way. If the product
is damaged, return it to NI for repair.
Installing the Software
You must be an Administrator to install NI software on your computer.
1. Install an ADE, such as LabVIEW or LabVIEW Communications System Design
Software.
2. Visit ni.com/info and enter the Info Code usrpdriver to access the driver download
page for the latest NI-USRP software.
3. Download the NI-USRP driver software.
4. Follow the instructions in the installation prompts.
Note Windows users may see access and security messages during
installation. Accept the prompts to complete the installation.
5. When the installer completes, select Restart in the dialog box that prompts you to restart,
shut down, or restart later.
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Installing USRP-2900/2901 Devices
Install LabVIEW Communications System Design Software and NI-USRP before you install
the hardware.
Note The USRP-2900/2901 device connects to a host computer using a standard
USB connector and USB cable.
1. Power on the computer.
2. Attach the antenna or cable to the front panel terminals of the USRP-2900/2901 device as
needed for your application.
3. Use the USB cable to connect the USRP device to the computer.
Note You can connect the USRP device to either a USB 3.0 or a USB 2.0
port. If you use a USB 2.0 port, the maximum achievable sample rate may be
reduced to 8 MS/s or less.
Note NI recommends that you connect the device to an external power supply
when you use USB 2.0.
4. (Optional) Connect the AC/DC power supply to the PWR connector on the back panel of
the USRP device, and plug the power supply into a wall outlet.
Note NI recommends that you connect the device to an external power supply
if you plan to use both channels of the USRP device. However, if you plan to
use only one channel, bus power may be acceptable.
You can connect and synchronize multiple USRP-2900/2901 devices using an external
Reference Clock distribution system such as the CDA-2990 Clock Distribution Device.
However, USB performance varies when multiple devices stream through the same controller.
Consider using a USRP RIO device if you need to build a high-channel count system.
Configuring USRP-2900/2901 Devices
Confirming USB Connection
1. Select Start»All Programs»National Instruments»NI-USRP»NI-USRP
Configuration Utility to open the NI-USRP Configuration Utility.
2. Select the Devices tab of the utility.
Your device should appear in the list on the left side of the tab, similar to the following
figure.
USRP-2900/2901 Getting Started Guide | © National Instruments | 5

Figure 1. Confirming USB Connection
Note If your device is not listed, verify that your device is powered on and
correctly connected, then click the Refresh Devices List button to scan for
USRP devices.
Changing the Device ID
To change the USRP-2900/2901 device ID, you must know the current address of the device.
1. Verify that your device is powered on and connected to your computer using the USB 3.0
or 2.0 interface.
2. Select Start»All Programs»National Instruments»NI-USRP»NI-USRP
Configuration Utility to open the NI-USRP Configuration Utility.
3. Select the Devices tab of the utility.
Your device should appear in the list on the left side of the tab.
4. In the list, select the device for which you want to change the device ID.
If you have multiple devices, verify that you selected the correct device.
The device ID of the selected device displays in the Selected Device ID textbox.
5. Enter the device ID for the device in the New Device ID textbox.
Note The device ID cannot contain spaces or special characters.
The utility should appear similar to the following figure.
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Figure 2. Changing the Device ID
6. Click the Change Device ID button or press <Enter> to change the device ID.
7. The utility prompts you to confirm your selection. Click OK if your selection is correct;
otherwise, click Cancel.
8. The utility displays a confirmation to indicate the process is complete. Click OK.
9. Power cycle the device to apply the changes.
Note After you change the device ID, you must power cycle the device and
click Find Devices in the utility to update the list of devices.
Configuring Multiple Devices with USB
You can connect multiple devices in the following ways:
• Multiple USB 2.0 or 3.0 interfaces—One device for each interface
• Single USB 2.0 or 3.0 interface—Multiple devices connected to a USB 2.0 or 3.0 hub
Tip Sharing a single USB 2.0 or 3.0 controller interface on your host computer
among multiple devices may reduce overall signal throughput. For maximum signal
throughput, NI recommends that you connect no more than one device per USB
interface.
To configure multiple devices connected to either separate USB 2.0 or 3.0 interfaces or to a
USB hub, assign a different device ID to each USRP device. Because each USRP-2900/2901
device has the same default device ID, you must change the device ID for each USRP device
before you connect an additional device to the host computer.
USRP-2900/2901 Getting Started Guide | © National Instruments | 7

Programming the USRP-2900/2901
NI-USRP Instrument Driver
NI-USRP features a set of VIs and properties that exercise the functionality of the
USRP-2900/2901, including configuration, control, and other device-specific functions. Refer
to the NI-USRP Help for information about using the instrument driver in your applications.
NI-USRP Examples
The instrument driver examples are instructional tools that demonstrate some of the
functionality of the USRP-2900/2901. You can use these examples separately or integrate
them into your systems. NI-USRP includes examples for getting started and other SDR
functionality. You can access the NI-USRP examples from the following locations:
• In LabVIEW Communications System Design Software at Learning»Examples»
Hardware Input and Output.
• From the Start menu at Start»All Programs»National Instruments»NI-USRP»
Examples.
• In LabVIEW from Functions»Instrument I/O»Instrument Drivers»NI‑USRP»
Examples palette.
You can access additional examples from the code sharing community at ni.com/usrp.
Note The NI Example Finder does not include NI-USRP examples.
Verifying the Device Connection (Optional)
Using LabVIEW Communications System Design Software
Run a VI to confirm that the device transmits and receives signals and is connected correctly
to the host computer.
1. Navigate to Learning»Examples»Hardware Input and Output to create an example.
2. Select the Single-Device Streaming project template for your device.
3. Run Tx and Rx Streaming (Host).gvi.
If the device is transmitting and receiving signals, the front panel graphs display
waveform data.
4. Click STOP to conclude the test.
Using LabVIEW
Perform a loopback test to confirm that the device transmits and receives signals and is
connected correctly to the host computer.
1. Attach the included 30 dB attenuator to one end of the SMA (m)-to-SMA (m) cable.
2. Connect the 30 dB attenuator to the RX 2 TX 2 connector on the front panel of the USRP
device, and connect the other end of the SMA (m)-to-SMA (m) cable to the RX 1 TX 1
port.
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3. On the host computer, open the niUSRP EX Tx Continuous Async example VI and run it.
If the device is transmitting signals, the IQ graph displays I and Q waveforms.
4. Open the niUSRP EX Rx Continuous Async example VI and run it.
If the device is receiving signals, the IQ graph displays I and Q waveforms.
Troubleshooting
If an issue persists after you complete a troubleshooting procedure, contact NI technical
support or visit ni.com/support.
Why Doesn't the USRP Device Appear in MAX?
MAX does not support USRP-2900/2901 devices. Use the NI-USRP Configuration Utility
instead. Open the NI-USRP Configuration Utility from the Start menu at Start»All
Programs»National Instruments»NI-USRP»NI-USRP Configuration Utility.
Why Doesn't the USRP Device Appear in the NI-USRP
Configuration Utility?
1. Verify that the latest NI-USRP drivers are installed by running NI Update Service,
available from the Start menu at Start»All Programs»National Instruments»NI
Update Service.
2. Check the LED status to ensure the device is powered correctly. If the LED is blue, the
device is powered correctly using USB. If the LED is orange, the device is powered
correctly using external power.
3. Connect the device to a different USB port of the host computer, if one is available.
4. Ensure that the latest drivers are installed for your USB controller.
Front Panels and Connectors
Direct Connections to the USRP-2900/2901
The USRP-2900/2901 is an RF instrument that is sensitive to ESD and transients. Ensure you
take the following precautions when making direct connections to the USRP-2900/2901 to
avoid damaging the device.
Caution Apply external signals only while the USRP-2900/2901 is powered on.
Applying external signals while the device is powered off may cause damage.
• Ensure you are properly grounded when manipulating cables or antennas connected to the
USRP-2900/2901 TX1 RX 1 or RX2 connector.
• If you are using nonisolated devices, such as a nonisolated RF antenna, ensure the devices
are maintained in a static-free environment.
• If you are using an active device, such as a preamplifier or switch routed to the
USRP-2900/2901 TX1 RX 1 or RX2 connector, ensure that the device cannot generate
signal transients greater than the RF and DC specifications of the USRP-2900/2901 TX1
RX 1 or RX2 connector.
USRP-2900/2901 Getting Started Guide | © National Instruments | 9

USRP-2900 Connectors and LEDs
Figure 3. USRP-2900 Front Panel
NI USRP-2900
70 MHz–6 GHz
ESD
SENSITIVE
TX OUTPUT MAX +20 dBm, RX INPUT MAX –15 dBm, ALL RF PORTS 50 Ω
RF 0
TX1 RX1
RX2
Designed by Ettus Research
Table 1. Device Front Panel Icon Definitions
Refer to the user documentation for required maintenance measures to ensure user
safety and/or preserve the specified EMC performance.
The signal pins of this product's input/output ports can be damaged if subjected to
ESD. To prevent damage, turn off power to the product before connecting cables and
employ industry-standard ESD prevention measures during installation, maintenance,
and operation.
Table 2. USRP-2900 Module Front Panel Connectors
Connector Use
RX2 Input terminal for the RF signal. RX2 is an SMA (f) connector with an
impedance of 50 Ω and is a single-ended input channel.
TX1 RX1 Input and output terminal for the RF signal. TX1 RX1 is an SMA (f) connector
with an impedance of 50 Ω and is a single-ended input or output channel.
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