NATIONAL INSTRUMENTS USRP Software Defined Radio Device User Guide
- June 12, 2024
- NATIONAL INSTRUMENTS
Table of Contents
- Verifying the System Requirements
- Unpacking the Kit
- Verifying the Kit Contents
- Environmental Guidelines
- Installing the Software
- Configuring the Device
- Programming the Device
- Troubleshooting
- Front Panels and Connectors
- Where to Go Next
- Worldwide Support and Services
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
GETTING STARTED GUIDE
USRP-2920/2921/2922
USRP Software Defined Radio Device
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This document explains how to install, configure, and test the following USRP devices:
- USRP-2920 Software Defined Radio Device
- USRP-2921 Software Defined Radio Device
- USRP-2922 Software Defined Radio Device
The USRP-2920/2921/2922 device can send and receive signals for use in various communications applications. This device ships with the NI-USRP instrument driver, which you can use to program the device.
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
Notice 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.
-
Touch the antistatic package to a metal part of the computer chassis.
-
Remove the device from the package and inspect the device for loose components or any other sign of damage.
Notice Never touch the exposed pins of connectors.
Note Do not install a device if it appears damaged in any way. -
Unpack any other items and documentation from the kit.
Store the device in the antistatic package when the device is not in use.
Verifying the Kit Contents
1. USRP Device | 4. SMA (m)-to-SMA (m) Cable |
---|---|
2. AC/DC Power Supply and Power Cable | 5. 30 dB SMA Attenuator |
3. Shielded Ethernet Cable | 6. Getting Started Guide (This Document) and |
Safety, Environmental, and Regulatory Information Document
Notice If you directly connect or cable a signal generator to your device, or if you connect multiple USRP devices together, you must connect a 30 dB attenuator to the RF input (RX1 or RX2) of each receiving USRP device.
Other Required Item(s)
In addition to the kit contents, you must provide a computer with available
gigabit Ethernet interface.
Optional Items
-
LabVIEW Modulation Toolkit (MT), available for download at ni.com/downloads and included in LabVIEW Communications System Design Suite, which includes MT VIs and functions, examples, and documentation
Note You must install the LabVIEW Modulation Toolkit for proper operation of the NI-USRP Modulation Toolkit example VIs. -
LabVIEW Digital Filter Design Toolkit, available for download at ni.com/downloads and included in LabVIEW Communications System Design Suite
-
LabVIEW MathScript RT Module, available for download at ni.com/downloads
-
USRP MIMO sync and data cable, available at ni.com, to synchronize clock sources
-
Additional SMA (m)-to-SMA (m) cables to connect both channels with external devices or to use the REF IN and PPS IN signals
Environmental Guidelines
Notice This model is intended for use in indoor applications only
Environmental Characteristics
Operating temperature | 0 °C to 45 °C |
---|---|
Operating humidity | 10% to 90% relative humidity, noncondensing |
Pollution Degree | 2 |
Maximum altitude | 2,000 m (800 mbar) (at 25 °C ambient temperature) |
Installing the Software
You must be an Administrator to install NI software on your computer.
- Install an application development environment (ADE), such as LabVIEW or LabVIEW Communications System Design Suite.
- Follow the instructions below that correspond with the ADE that you installed.
Installing the Software Using NI Package Manager
Ensure that you have installed the latest version of NI Package Manager. To
access the download page for NI Package Manager, go to ni.com/info and enter
info code NIPMDownload.
Note NI-USRP versions 18.1 to current are available to download using NI
Package Manager. To download another version of NI-USRP, refer to Installing
the
Software Using the Driver Download Page.
- To install the latest NI-USRP instrument driver, open NI Package Manager.
- On the BROWSE PRODUCTS tab, click Drivers to display all available drivers.
- Select NI-USRP and click INSTALL.
- 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.
Related Information
Refer to the NI Package Manager Manual for instructions on installing drivers
using NI Package Manager.
Installing the Software Using the Driver Download Page
Note NI recommends using NI Package Manager to download NI-USRP driver
software.
-
Visit ni.com/info and enter the Info Code usrpdriver to access the driver download page for all versions of NI-USRP software.
-
Download a version of NI-USRP driver software.
-
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. -
When the installer completes, select Shut Down in the dialog box that prompts you to restart, shut down, or restart later.
Installing the Device
Install all the software you plan to use before you install the hardware.
Note The USRP device connects to a host computer using a standard gigabit
Ethernet interface. Refer to the documentation for your gigabit Ethernet
interface for installation and configuration instructions.
- Power on the computer.
- Attach the antenna or cable to the front panel terminals of the USRP device as desired.
- Use the Ethernet cable to connect the USRP device to the computer. For maximum throughput over Ethernet, NI recommends that you connect each USRP device to its own dedicated gigabit Ethernet interface on the host computer.
- Connect the AC/DC power supply to the USRP device.
- Plug the power supply into a wall outlet. Windows automatically recognizes the USRP device.
Synchronizing Multiple Devices (Optional)
You can connect two USRP devices so that they share clocks and the Ethernet
connection to the host.
-
Connect the MIMO cable to the MIMO EXPANSION port of each device.
-
If you have not already done so, attach antennas to the USRP devices.
If you want to use one USRP device as a receiver and the other as a transmitter, attach one antenna to the RX 1 TX 1 port of the transmitter, and attach another antenna to the
RX 2 port of the receiver.
The NI-USRP driver ships with some examples that you can use to explore the MIMO connection, including USRP EX Rx Multiple Synchronized Inputs (MIMO Expansion) and USRP EX Tx Multiple Synchronized Outputs (MIMO Expansion).
Configuring the Device
Setting Up the Network (Ethernet Only)
The device communicates with a host computer over gigabit Ethernet. Set up the
network to enable communication with the device.
Note The IP addresses for the host computer and each connected USRP
device must be unique.
Configuring the Host Ethernet Interface with a Static IP Address
The default IP address for the USRP device is 192.168.10.2.
-
Ensure the host computer uses a static IP address.
You may need to modify the network settings for the local area connection using the Control Panel on the host computer. Specify the static IP address in the Properties page for Internet Protocol Version 4 (TCP/IPv4). -
Configure the host Ethernet interface with a static IP address on the same subnet as the connected device to enable communication, as shown in the following table.
Table 1. Static IP Addresses
Component | Address |
---|---|
Host Ethernet interface static IP address | 192.168.10.1 |
Host Ethernet interface subnet mask | 255.255.255.0 |
Default USRP device IP address | 192.168.10.2 |
Note NI-USRP uses user datagram protocol (UDP) broadcast packets to
locate the device. On some systems, the firewall blocks UDP broadcast packets.
NI recommends that you change or disable the firewall settings to allow
communication with the device.
Changing the IP Address
To change the USRP device IP address, you must know the current address of the
device, and you must configure the network.
-
Verify that your device is powered on and connected to your computer using the gigabit Ethernet interface.
-
Select Start»All Programs»National Instruments»NI-USRP»NI-USRP Configuration Utility to open the NI-USRP Configuration Utility, as shown in the following figure.
Your device should appear in the list on the left side of the tab. -
Select the Devices tab of the utility.
-
In the list, select the device for which you want to change the IP address.
If you have multiple devices, verify that you selected the correct device.
The IP address of the selected device displays in the Selected IP Address textbox. -
Enter the new IP address for the device in the New IP Address textbox.
-
Click the Change IP Address button or press
to change the IP address.
The IP address of the selected device displays in the Selected IP Address textbox. -
The utility prompts you to confirm your selection. Click OK if your selection is correct; otherwise, click Cancel.
-
The utility displays a confirmation to indicate the process is complete. Click OK.
-
Power cycle the device to apply the changes.
-
After you change the IP address, you must power cycle the device and click Refresh Devices List in the utility to update the list of devices.
Confirming Network Connection
-
Select Start»All Programs» National Instruments NI-USRP»NI-USRP
Configuration Utility to open the NI-USRP Configuration Utility. -
Select the Devices tab of the utility.
Your device should appear in the Device ID column.
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.
Configuring Multiple Devices with Ethernet
You can connect multiple devices in the following ways:
- Multiple Ethernet interfaces—One device for each interface
- Single Ethernet interface—One device connected to the interface, with additional devices connected using an optional MIMO cable
- Single Ethernet interface—Multiple devices connected to an unmanaged switch
Tip Sharing a single gigabit Ethernet interface among devices may reduce overall signal throughput. For maximum signal throughput, NI recommends that you connect no more than one device per Ethernet interface.
Multiple Ethernet Interfaces
To configure multiple devices connected to separate gigabit Ethernet
interfaces, assign each Ethernet interface a separate subnet, and assign the
corresponding device an address in that subnet, as shown in the following
table.
Device| Host IP Address| Host Subnet Mask| Device IP
Address
---|---|---|---
USRP Device 0| 192.168.10.1|
255.255.255.0| 192.168.10.2
USRP Device 1| 192.168.11.1|
255.255.255.0| 192.168.11.2
Single Ethernet Interface—One Device
You can configure multiple devices using a single host Ethernet interface when
the devices are connected to each other using a MIMO cable.
- Assign each device a separate IP address in the subnet of the host Ethernet interface, as shown in the following table.
Table 3. Single Host Ethernet Interface—MIMO Configuration Device| Host IP Address| Host Subnet Mask| Device IP Address
---|---|---|---
USRP Device 0| 192.168.10.1| 255.255.255.0| 192.168.10.2
USRP Device 1| 192.168.11.1| 255.255.255.0| 192.168.11.2 - Connect Device 0 to the Ethernet interface and connect Device 1 to Device 0 using a MIMO cable.
Single Ethernet Interface—Multiple Devices Connected to an Unmanaged
Switch
You can connect multiple USRP devices to a host computer through an unmanaged
gigabit Ethernet switch that allows a single gigabit Ethernet adapter on the
computer to interface with multiple USRP devices connected to the switch.
Assign the host Ethernet interface a subnet, and assign each device an address
in that subnet, as shown in the following table.
Table 4. Single Host Ethernet Interface—Unmanaged Switch Configuration
Device| Host IP Address| Host Subnet Mask| Device IP
Address
---|---|---|---
USRP Device 0| 192.168.10.1|
255.255.255.0| 192.168.10.2
USRP Device 1| 192.168.11.1|
255.255.255.0| 192.168.11.2
Programming the Device
You can use the NI-USRP instrument driver to create communications
applications for the USRP device.
NI-USRP Instrument Driver
The NI-USRP instrument driver features a set of functions and properties that
exercise the capabilities of the USRP device, including configuration,
control, and other device-specific functions.
Related Information
Refer to the NI-USRP Manual for information about using the instrument driver
in your applications.
NI-USRP Examples and Lessons
NI-USRP includes several examples and lessons for LabVIEW, LabVIEW NXG, and
LabVIEW Communications System Design Suite. They can be used individually or
as components of other applications.
NI-USRP examples and lessons are available in the following locations.
Content
Type| Description| LabVIEW| LabVIEW NXG 2.1 to Current or LabVIEW
Communications System Design Suite
2.1 to Current
---|---|---|---
Examples| NI-USRP includes several example applications that serve as
interactive tools, programming models, and building blocks in your own
applications. NI-USRP includes examples for
getting started and other software-defined radio (SDR) functionality.
Note You can access additional examples from the Code Sharing Community at
ni . com/usrp.| • From the Start menu at Start» All Programs» National
Instruments »N I- USRP» Examples.
• From the LabVIEW Functions palette at Instrument 1/0»Instrument
Drivers»NIUSRP» Examples.| • From the Learning tab, select Examples» Hardware
Input and Output» NiUSRP.
• From the Learning tab, select Examples» Hardware Input and Output NI USRP
RIO.
Lessons| NI-USRP includes lessons that guide you through the process of
identifying and demodulating an FM signal with your device.| –| From the
Learning tab, select Lessons» Getting Started» Demodulating FM Signals with
the NI… and choose a task to accomplish.
Note The NI Example Finder does not include NI-USRP examples.
Verifying the Device Connection (Optional)
Verifying the Device Connection Using LabVIEW NXG or
LabVIEW Communications System Design Suite 2.1 to Current
Use USRP Rx Continuous Async to confirm that the device receives signals and
is connected correctly to the host computer.
-
Navigate to Learning»Examples »Hardware Input and Output»NI-USRP»NI-USRP.
-
Select Rx Continuous Async. Click Create.
-
Run USRP Rx Continuous Async.
If the device is receiving signals you will see data on the front panel graphs. -
Click STOP to conclude the test.
Verifying the Device Connection Using LabVIEW
Perform a loopback test to confirm that the device transmits and receives
signals and is connected correctly to the host computer.
-
Attach the included 30 dB attenuator to one end of the SMA (m)-to-SMA (m) cable.
-
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.
-
On the host computer, navigate to
»National Instruments»LabVIEW »examples»instr»niUSRP. -
Open the niUSRP EX Tx Continuous Async example VI and run it.
If the device is transmitting signals, the I/Q graph displays I and Q waveforms. -
Open the niUSRP EX Rx Continuous Async example VI and run it.
If the device is transmitting signals, the I/Q 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.
Device Troubleshooting
Why Doesn’t the Device Power On?
Check the power supply by substituting a different adapter.
Why Does USRP2 Appear Instead of the USRP Device in the NI-USRP Configuration
Utility?
- An incorrect IP address on the computer may cause this error. Check the IP address and run the NI-USRP Configuration Utility again.
- An old FPGA or firmware image on the device may also cause this error. Upgrade the FPGA and firmware using the NI-USRP Configuration Utility.
Should I Update Device Firmware and FPGA Images?
USRP devices ship with firmware and FPGA images compatible with NI-USRP driver
software. You may need to update the device for compatibility with the latest
version of the software.
When you use the NI-USRP API, a default FPGA loads from persistent storage on
the device.
The driver software media also includes the NI-USRP Configuration Utility,
which you can use to update the devices.
Updating Device Firmware and FPGA Images (Optional)
The firmware and FPGA images for USRP devices are stored in the device
internal memory.
You can reload the FPGA image or firmware image using the NI-USRP
Configuration Utility and an Ethernet connection, but you cannot create custom
FPGA images using the Ethernet connection.
-
If you have not already done so, connect the host computer to the device using the Ethernet port.
-
Select Start»All Programs»National Instruments»NI-USRP»NI-USRP Configuration Utility to open the NI-USRP Configuration Utility.
-
Select the N2xx/NI-29xx Image Updater tab. The utility automatically populates the Firmware Image and FPGA Image fields with the paths to the default firmware and FPGA image files. If you want to use different files, click the Browse button next to the file you want to change, and navigate to the file you want to use.
-
Verify that the firmware and FPGA image paths are entered correctly.
-
Click the Refresh Device List button to scan for USRP devices and update the device list.
If your device does not appear in the list, verify that the device is on and is correctly connected to the computer.
If your device still does not appear in the list, you can manually add the device to the list. Click the Manually Add Device button, enter the IP address of the device in the dialog box that displays, and click OK. -
Select the device to update from the device list and verify that you selected the correct device.
-
Verify that the version of the FPGA image file matches the board revision for the device you are updating.
-
To update the device, click the WRITE IMAGES button.
-
A confirmation dialog box displays. Confirm your selections and click OK to continue.
A progress bar indicates the status of the update. -
When the update completes, a dialog box prompts you to reset the device. A device reset applies the new images to the device. Click OK to reset the device.
Note The utility is unresponsive while it verifies that the device reset correctly. -
Close the utility.
Related Information
Refer to the Load the Images onto the On-board Flash (USRP-N Series Only)
section of the UHD – USRP2 and N Series Application Notes
Why Doesn’t the USRP Device Appear in MAX?
MAX does not support the USRP device. 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?
- Check the connection between the USRP device and the computer.
- Ensure that the USRP device is connected to a computer with a gigabit-compatible Ethernet adapter.
- Ensure that a static IP address of 192.168.10.1 is assigned to the adapter in your computer.
- Allow up to 15 seconds for the device to completely start up.
Why Don’t NI-USRP Examples Appear in the NI Example Finder in LabVIEW?
NI-USRP does not install examples into the NI Example Finder.
Related Information
NI-USRP Examples and Lessons on page 9
Network Troubleshooting
Why Doesn’t the Device Respond to a Ping (ICMP Echo Request)?
The device should reply to an internet control message protocol (ICMP) echo
request.
Complete the following steps to ping the device and receive a response.
- To ping the device, open a Windows command prompt and enter ping 192.168.10.2, where 192.168.10.2 is the IP address for your USRP device.
- If you do not receive a response, verify that the host network interface card is set to a static IP address corresponding to the same subnet as the IP address of the corresponding device.
- Verify that the device IP address is set properly.
- Repeat step 1.
Related Information
Changing the IP Address on page 6
Why Doesn’t the NI-USRP Configuration Utility Return a Listing for My Device?
If the NI-USRP Configuration Utility does not return a listing for your
device, search for a specific IP address.
- Navigate to
\National Instruments\NI-USRP\. -
-right-click the utilities folder, and select Open command window here from the shortcut menu to open a Windows command prompt. - Enter uhd_find_devices –args=addr= 192.168.10.2 in the command prompt, where 192.168.10.2 is the IP address for your USRP device.
- Press
.
If the uhd_find_devices command does not return the listing for your device, the firewall may be blocking replies to UDP broadcast packets. Windows installs and enables a firewall by default. To allow UDP communication with a device, disable any firewall software associated with the network interface for the device.
Why Doesn’t the Device IP Address Reset to the Default?
If you cannot reset the default device IP address, your device may be on a
different subnet than the host network adapter. You can power cycle the device
in a safe (read-only) image, which sets the device to the default IP address
of 192.168.10.2.
- Open the device enclosure, making sure to take appropriate static precautions.
- Locate the safe-mode button, a push-button switch (S2), inside the enclosure.
- Press and hold the safe-mode button while you power cycle the device.
- Continue to press the safe-mode button until the front panel LEDs blink and remain solid.
- While in safe-mode, run the NI-USRP Configuration Utility to change the IP address from the default, 192.168.10.2, to a new value.
- Power cycle the device without holding the safe-mode button to return the normal mode.
Note NI recommends that you use a dedicated network with no other USRP devices connected to the host computer to avoid the possibility of an IP address conflict. Also, verify that the static IP address of the host network adapter on the computer that runs the NI-USRP Configuration Utility is different from the device default IP address of 192.168.10.2 and different from the new IP address to which you want to set the device.
Note If the device IP address is on a different subnet from the host network adapter, the host system and configuration utility cannot communicate with and configure the device. For example, the utility recognizes, but cannot configure a device with an IP address of 192.168.11.2 connected to a host network adapter with a static IP address of 192.168.10.1 and a subnet mask of 255.255.255.0. To communicate with and configure the device, change the host network adapter to a static IP address on the same subnet as the device, such as 192.168.11.1, or change the subnet mask of the host network adapter to recognize a wider range of IP addresses, such as 255.255.0.0.
Related Information
Changing the IP Address on page 6
Why Does the Device Not Connect to the Host Interface?
The host Ethernet interface must be a gigabit Ethernet interface to connect to
the USRP device.
Ensure the connection between the host network interface card and the device
cable connection is valid and both the device and computer are powered on.
A lit green LED in the upper left corner of the gigabit Ethernet connection
port on the device front panel indicates a gigabit Ethernet connection.
Front Panels and Connectors
Direct Connections to the Device
The USRP device is a precision RF instrument that is sensitive to ESD and
transients. Ensure you take the following precautions when making direct
connections to the USRP device to avoid damaging the device.
Notice Apply external signals only while the USRP device 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 device TX 1 RX 1 or RX 2 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 device TX 1 RX 1 or RX 2 connector, ensure that the device cannot generate signal transients greater than the RF and DC specifications of the USRP device TX 1 RX 1 or RX 2 connector.
USRP-2920 Front Panel and LEDs
Table 5. Connector Descriptions
Connector | Description |
---|---|
RX I TX I | Input and output terminal for the RF signal. RX I TX I is an SMA |
(f) connector with an impedance of 50 12 and is a single-ended input or output
channel.
RX 2| Input terminal for the RF signal. RX 2 is an SMA (f) connector with an
impedance of 50 CI and is a single-ended input channel.
REF IN| Input terminal for an external reference signal for the local
oscillator (LO) on the device. REF IN is an SMA (0 connector with an impedance
of 50 CI and is a single-ended reference input. REF IN accepts a 10 MHz signal
with a minimum input power of 0 dBm
(.632 Vpk-pk) and a maximum input power of 15 dBm (3.56 Vpk-pk) for a square
wave or sine wave.
PPS IN| Input terminal for the pulse per second (PPS) timing reference. PPS IN
is an SMA (t) connector with an impedance of 50 12 and is a single-ended
input. PPS IN accepts 0 V to 3.3 V TTL and 0 V to 5 V TTL signals.
MIMO EXPANSION| The MIMO EXPANSION interface port connects two USRP devices
using a compatible MIMO cable.
GB ETHERNET| The gigabit Ethernet port accepts an RJ-45 connector and gigabit
Ethernet compatible cable (Category 5, Category 5e, or Category 6).
POWER| The power input accepts a 6 V, 3 A external DC power connector.
Table 6. LED Indicators
LED | Description | Color | Indication |
---|---|---|---|
A | Indicates the transmit status of the device. | Off | The device is not |
transmitting data.
Green| The device is transmitting data.
B| Indicates the status of the physical MIMO cable link.| Off| The devices are
not connected using the MIMO cable.
Green| The devices are connected using the MIMO cable.
C| Indicates the receive status of the device.| Off| The device is not
receiving data.
Green| The device is receiving data.
D| Indicates the firmware status of the device.| Off| The firmware is not
loaded.
Green| The firmware is loaded.
E| Indicates the reference lock status of the LO on the device.| Off| There is
no reference signal, or the LO is not locked to a reference signal.
Blinking| The LO is not locked to a reference signal.
Green| The LO is locked to a reference signal.
F| Indicates the powers status of the device.| Off| The device is powered off.
Green| The device is powered on.
USRP-2921 Front Panel and LEDs
Table 7. Connector Descriptions
Connector | Description |
---|
RX I
TX I| Input and output terminal for the RF signal. RX I TX I is an SMA (f)
connector with an impedance of 50 12 and is a single-ended input or output
channel.
RX 2| Input terminal for the RF signal. RX 2 is an SMA (f) connector with an
impedance of 50 fl and is a single-ended input channel.
REF IN| Input terminal for an external reference signal for the local
oscillator (LO) on the device. REF IN is an SMA (f) connector with an
impedance of 50 SI and is a single-ended reference input. REF IN accepts a 10
MHz signal with a minimum input power of 0 dBm (.632 Vpk-pk) and a maximum
input power of IS dBm (3.56 Vpk-pk) for a square wave or sine wave.
PPS IN| Input terminal for the pulse per second (PPS) timing reference. PPS IN
is an SMA (f) connector with an impedance of 50 12 and is a single-ended
input. PPS IN accepts 0 V to 3.3 V TTL and 0 V to 5 V TEL signals.
MIMO EXPANSION| The MIMO EXPANSION interface port connects two USRP devices
using a compatible MIMO cable.
GB ETHERNET| The gigabit Ethernet port accepts an RJ-45 connector and gigabit
Ethernet compatible cable (Category 5, Category 5e, or Category 6).
POWER| The power input accepts a 6 V, 3 A external DC power connector.
Table 8. LED Indicators
LED | Description | Color | Indication |
---|---|---|---|
A | Indicates the transmit status of the device. | Off | The device is not |
transmitting data.
Green| The device is transmitting data.
B| Indicates the status of the physical MIMO cable link.| Off| The devices are
not connected using the MIMO cable.
Green| The devices are connected using the MIMO cable.
C| Indicates the receive status of the device.| Off| The device is not
receiving data.
Green| The device is receiving data.
D| Indicates the firmware status of the device.| Off| The firmware is not
loaded.
Green| The firmware is loaded.
E| Indicates the reference lock status of the LO on the device.| Off| There is
no reference signal, or the LO is not locked to a reference signal.
Blinking| The LO is not locked to a reference signal.
Green| The LO is locked to a reference signal.
F| Indicates the powers status of the device.| Off| The device is powered off.
Green| The device is powered on.
USRP-2922 Front Panel and LEDs
Table 9. Connector Descriptions
Connector | Description |
---|
RX I
TX 1| Input and output terminal for the RF signal. RX I TX I is an SMA (f)
connector with an impedance of 50 12 and is a single-ended input or output
channel.
RX 2| Input terminal for the RF signal. RX 2 is an SMA (f) connector with an
impedance of 50 ci and is a single-ended input channel.
RE :F IN| Input terminal for an external reference signal for the local
oscillator (LO) on the device. REF IN is an SMA (f) connector with an
impedance of 50 D and is a single-ended reference input. REF IN accepts a 10
MHz signal with a minimum input power of 0 dBm (.632 Vpk-pk) and a maximum
input power of 15 dBm (3.56 Vpk-pk) for a square wave or sine wave.
PPS IN| Input terminal for the pulse per second (PPS) timing reference. PPS IN
is an SMA (f) connector with an impedance of 50 CI and is a single-ended
input. PPS IN accepts 0 V to 3.3 V TTL and 0 V to 5 V TTL signals.
MIMO EXPANSION| The MIMO EXPANSION interface port connects two USRP devices
using a compatible MIMO cable.
GB ETHERNET| The gigabit Ethernet port accepts an RJ-45 connector and gigabit
Ethernet compatible cable (Category 5, Category 5e, or Category 6).
POWER| The power input accepts a 6 V, 3 A external DC power connector.
Table 10. LED Indicators
LED | Description | Color | indication |
---|---|---|---|
A | Indicates the transmit status of the device. | Off | The device is not |
transmitting data.
Green| The device is transmitting data.
B| Indicates the status of the physical MIMO cable link.| Off| The devices are
not connected using the MIMO cable.
Green| The devices are connected using the MIMO cable.
C| Indicates the receive status of the device.| Off| The device is not
receiving data.
Green| The device is receiving data.
D| Indicates the firmware status of the device.| Off| The firmware is not
loaded.
Green| The firmware is loaded.
E| Indicates the reference lock status of the LO on the device.| Off| There is
no reference signal, or the LO is not locked to a reference signal.
Blinking| The LO is not locked to a reference signal.
Green| The LO is locked to a reference signal.
F| Indicates the powers status of the device.| Off| The device is powered off.
Green| The device is powered on.
Where to Go Next
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ni.com/info cseriesdoc
---|---
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ni.com/services
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References
- Test and Measurement Systems, a part of Emerson - NI
- Software and Driver Downloads - NI
- Using Info Codes - NI
- Product Documentation - NI
- Contact Us - NI
- Product Documentation - NI
- USRP Hardware Driver and USRP Manual: USRP2 and N2x0 Series
- Log In - National Instruments
- 5G and 6G Technology - NI
- NI Services - NI
- Support - NI
- NI Trademarks and Logo Guidelines - NI
- Software and Driver Downloads - NI
- What is a USRP Software Defined Radio? - NI
- Software and Driver Downloads - NI
- Using Info Codes - NI
- Product Documentation - NI
- Contact Us - NI
- Product Documentation - NI
- Log In - National Instruments
- NI Services - NI
- Support - NI
- USRP-2920 National Instruments Software Defined Radio Device | Apex Waves
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