National Instruments USRP-2950 User manual

USRP-2950/2952/2953/2954/2955
2022-07-11

Contents
USRP RIO Getting Started Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Verifying the System Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unpacking the Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Verifying the Kit Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Preparing the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installing the Soware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installing USRP RIO Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Synchronizing Multiple USRP RIO Devices (Optional). . . . . . . . . . . . . . . . . . . . . . . 9
Preparing the USRP-2955 for LO Sharing (Optional). . . . . . . . . . . . . . . . . . . . . . . 10
Programming the USRP RIO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
NI-USRP Instrument Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
NI-USRP Sample Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
NI-USRP Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Verifying the Device Connection (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Should I Update Device Firmware and FPGA Images?. . . . . . . . . . . . . . . . . . . . . . 14
Why Doesn't the Device Power On?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Why Doesn't the USRP Device Appear in the NI-USRP Configuration Utility?. . 14
Why Does USRP2 Appear Instead of USRP RIO in the NI-USRP Configuration
Utility?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Why Don't NI-USRP Examples Appear in the NI Example Finder?. . . . . . . . . . . . 15
Front Panels, Back Panels, and Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Direct Connections to the USRP RIO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
USRP-2950. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
USRP-2952. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
USRP-2953. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
USRP-2954. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
USRP-2955. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
GPIO Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Where to Go Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Worldwide Support and Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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USRP RIO Getting Started Guide
This document explains how to install, configure, and test the following USRP RIO
devices:
■USRP-2950R Soware Defined Radio Reconfigurable Device (USRP-2950)
■USRP-2952R Soware Defined Radio Reconfigurable Device (USRP-2952)
■USRP-2953R Soware Defined Radio Reconfigurable Device (USRP-2953)
■USRP-2954R Soware Defined Radio Reconfigurable Device (USRP-2954)
■USRP-2955 Soware Defined Radio Reconfigurable Device (USRP-2955)
The USRP RIO can send and/or receive signals for use in various communications
applications. The device ships with the NI-USRP instrument driver, which you can
use to program the device.
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.
© National Instruments 3
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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 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
Figure 1. Kit Contents
LINK PWR
TX OUTPUT MAX +20 dBm, RX INPUT MAX -15 dBm, ALL RF PORTS 50 W
TX1 RX1 RX2
GPS
PPS
REF
TX1 RX1 RX2
AUX I/O
3.3 VDC MAX
RF 0 RF 1
NI USRP-2943R
1.2 GHz - 6 GHz
NI USRP-2943R
1.2 GHz - 6 GHz
Designed by Ettus ResearchDesigned by Ettus Research
JTAG
1
54
3
2
1. USRP RIO Device
2. SMA Driver Bit (USRP-2955 Only)
3. Getting Started Guide (This Document)
4. SMA (m)-to-SMA (m) Cable
5. 30 dB SMA Attenuator (Not Included with USRP-2955)
Caution If you directly connect or cable a signal generator to your device,
or if you connect multiple USRP RIO devices together, you must connect a
30 dB attenuator to the RF input (RX1 or RX2) of each receiving USRP RIO
device.
Other Required Item(s)
In addition to the kit contents, you must provide the following additional item(s):
■An MXI Express interface card. You can purchase an MXI Express interface kit
for your USRP RIO device, which contains an MXI Express interface card, at
ni.com.
© National Instruments 5
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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
■Additional SMA (m)-to-SMA (m) cables to use the REF IN and PPS IN signals
■GPS antenna for devices with GPS disciplined oscillator (GPSDO) support
■PCIe - MXI Express Interface Kit for USRP RIO to connect to a desktop
computer
■ExpressCard Slot - MXI Express Interface Kit for USRP RIO to connect to a
laptop computer
■PXIe - MXI Express Interface Kit for USRP RIO to connect to a PXI Express
chassis
■CDA-2990 Clock Distribution Device for synchronizing multiple devices
■CPS-8910 Switch Device for PCI Express for large multiple-input, multiple-
output (MIMO) expansion configurations
Preparing the Environment
Ensure that the environment you are using the USRP RIO 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
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Pollution Degree 2
Maximum altitude 2,000 m
Indoor use only.
Caution Do not operate the USRP RIO 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 Soware
You must be an Administrator to install NI soware on your computer.
1. Install an ADE, such as LabVIEW or LabVIEW Communications System Design
Suite.
2. Visit ni.com/info and enter the Info Code usrpdriver to access the driver
download page for the latest NI-USRP soware.
3. Download the NI-USRP driver soware.
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.
Installing USRP RIO Devices
Install all the soware you plan to use before you install the hardware. Ensure that
the USRP RIO device and computer are o before installing.
1. Attach the antenna or cable to the front panel terminals of the USRP RIO
device as desired.
© National Instruments 7
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2. Use the MXI Express Interface Kit to connect the USRP RIO device to the
computer.
1. Identify which MXI Express Interface Kit you want to use.
■If you are using the desktop connectivity kit or the PXI chassis
connectivity kit, follow the installation instructions in the Hardware
Installation section of the Set Up Your MXI™ Express ×4 System
document included in that kit.
■If you are using the laptop connectivity kit, touch the
ExpressCard-8360 for USRP and outer metal case of the USRP RIO
device simultaneously.
2. Connect the MXI device to the USRP RIO device using the included
cable.
If you are using the laptop connectivity kit, refer to the following figure.
Figure 2. Connecting the USRP RIO Device with a Laptop Connectivity Kit
4
2
1
3
1. Cable Included with ExpressCard Interface Kit
2. ExpressCard-8360 for USRP Device for PXI Remote Control
3. ExpressCard Slot
4. Laptop Computer
3. Connect the AC/DC power supply to the USRP RIO device.
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4. Plug the power supply into a wall outlet. Press the PWR button.
5. Power on the computer.
Windows automatically recognizes the USRP RIO device.
Related information
■Refer to the Set Up Your MXI™ Express ×4 System document for installation
instructions.
Synchronizing Multiple USRP RIO Devices (Optional)
To set up a higher channel-count system, you can synchronize two or more
USRP RIO devices so that they share clock and PPS signals.
Note Synchronizing multiple USRP RIO devices requires a CDA-2990
accessory.
Ensure that all hardware is set up as previously indicated.
1. Connect the REF IN port of the USRP RIO device to the first 10 MHz OUT port of
the CDA-2990 using a standard SMA (m)-to-SMA (m) cable.
2. Connect the PPS TRIG IN port of the USRP RIO device to the PPS OUT port of
the CDA-2990 using a standard SMA (m)-to-SMA (m) cable.
3. Repeat steps 1 and 2 to synchronize additional USRP RIO devices using the
additional ports on the CDA-2990 (optional).
The completed hardware setup for two USRP RIO devices is shown in the
following figure.
© National Instruments 9
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Figure 3. Synchronizing Multiple USRP RIO Devices with the CDA-2990
CDA-2990
Designed by Ettus ResearchDesigned by Ettus Research 3 4 5 621 78 7 83 4 5 621
PPS OUT10 MHz OUT PPS OUT
POWER
GPS LOCK
PPS
STATUS
EXTERNAL
INTERNAL
ETHERNET GPS ANT
INPUT
PRIMARY REF
INTERNAL
EXTERNAL
EXT 10 MHz
INPUT
EXT PPS
INPUT POWER
8 Channel Clock Distribution Module
6 – 15 V
6 W MAX
0 1
PWR REF
IN
PPS
OUT
TRIG
5V DC
REF
OUT
1G/10G ETH
3.3 V +15 dBm
MAX
9-16V DC
7.5 A MAX
SFP+Ports
PCIe x4
TRIG
3.3V
IN
5V MAX
PPS GPS
ANT
–15 dBm
MAX
0 1
PWR REF
IN
PPS
OUT
TRIG
5V DC
REF
OUT
1G/10G ETH
3.3 V +15 dBm
MAX
9-16V DC
7.5 A MAX
SFP+Ports
PCIe x4
TRIG
3.3V
IN
5V MAX
PPS GPS
ANT
–15 dBm
MAX
Standard
SMA-SMA
Cables
10 MHz
PPS
Preparing the USRP-2955 for LO Sharing (Optional)
Complete the following steps to prepare a single USRP-2955 device to share local
oscillators (LOs) among all four channels in the device.
1. Connect the LO OUT 1 IF2 connector of the USRP-2955 back panel to the
LO IN 0 IF2 connector of the same USRP-2955 back panel using an SMA(m)-to-
SMA(m) cable.
2. Connect the LO OUT 1 IF1 connector of the USRP-2955 back panel to the
LO IN 0 IF1 connector of the same USRP-2955 back panel using an SMA(m)-to-
SMA(m) cable.
The completed hardware setup is shown in the following figure.
Figure 4. USRP-2955 Single Device LO Sharing
0 1
PWR 1G/10G ETH
9-16V DC
7.5 A MAX
SFP+Ports
1
1. SMA(m)-to-SMA(m) Cables
Programming the USRP RIO
You can use the NI-USRP instrument driver to create communications applications
for the USRP RIO.
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USRP RIO devices are LabVIEW FPGA targets, which support creating custom FPGAs
and configuring the device using Instrument Design Libraries. Use a sample project
as a starting point for application development.
Note You must use the PCIe x4 connector if you want to program the
FPGA. You cannot use the 1G/10G ETH connector to program the FPGA.
NI-USRP Instrument Driver
NI-USRP features a set of VIs and properties that exercise the functionality of the
USRP RIO, including configuration, control, and other device-specific functions.
Refer to the NI-USRP Help for information about using the instrument driver in your
applications.
Soware Options
NI provides two soware options for programming the USRP RIO device: the NI-
USRP API and the USRP RIO instrument design library (IDL).
Soware
Option
Description Use Case Palette Location
NI-USRP
API
Provides an API for
interacting with your
USRP RIO device.
Provides the standard, CPU-
based host operation
needed for most SDR
applications.
Create custom
measurements or
applications that require
in-phase/quadrature
modulation (I/Q) data.
Use with the Modulation
Toolkit to develop SDR
transmitters and
receivers.
Use with the Modulation
Toolkit to create and
generate modulated
signals.
LabVIEW Communications
System Design Suite:
Diagram » Hardware
Interfaces » NI-USRP
LabVIEW: Functions »
Instrument I/O » Instrument
Drivers » NI-USRP
USRP RIO
IDL
Allows you to interface with
the FPGA of your USRP RIO
device for advanced
Use with the LabVIEW
FPGA Module to customize
the behavior of the device
FPGA to create
LabVIEW Communications
System Design Suite:
Diagram » Hardware
Interfaces » USRP RIO
© National Instruments 11
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Soware
Option
Description Use Case Palette Location
programming and digital
signal processing (DSP).
Uses the USRP RIO Sample
Projects, which allow you to
take common
measurements with your
device. USRP RIO Sample
Projects are included in the
installation.
application-specific
instrument designs.
LabVIEW: Functions »
Instrument I/O » Instrument
Drivers » USRP RIO
Table 1. USRP RIO Soware Options
Note You cannot use the USRP RIO IDLs with the NI-USRP API.
NI-USRP Sample Projects
The NI-USRP soware contains sample projects that are a starting point for
application development.
ADE Instructions
LabVIEW
Communications
System Design Suite
Open the projects in LabVIEW Communications System Design Suite by
selecting the Projects tab and choosing a USRP sample project from the
array.
LabVIEW Open the projects in LabVIEW by selecting File » Create Project » NI-
USRP.
You must install the LabVIEW FPGA Module to customize the behavior of
the device FPGA.
Table 2. NI-USRP Sample Projects
NI-USRP Examples
The instrument driver examples are instructional tools that demonstrate some of
the functionality of the USRP RIO. 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:
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■In LabVIEW Communications System Design Suite 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.
Using LabVIEW Communications System Design Suite
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
Run a VI to confirm that the device transmits and/or receives signals and is
connected correctly to the host computer.
1. Create a sample project in LabVIEW by selecting File » Create Project »
NI-USRP.
2. Select the NI-USRP Simple Streaming sample project template and click Next.
3. Run the appropriate streaming VI according to your USRP RIO device.
© National Instruments 13
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Device VI
USRP-2950/2952/2953/2954 Tx and Rx Streaming Host VI
USRP-2955 Rx Streaming (Host) VI
If the device is transmitting and/or receiving signals, the front panel graphs
display waveform data.
4. Click STOP to conclude the test.
Troubleshooting
If an issue persists aer you complete a troubleshooting procedure, contact NI
technical support or visit ni.com/support.
Should I Update Device Firmware and FPGA Images?
USRP RIO devices ship with firmware and FPGA images compatible with NI-USRP
driver soware. You may need to update the device for compatibility with the latest
version of the soware.
The driver soware media also includes the NI-USRP Configuration Utility, which
you can use to update the devices.
Why Doesn't the Device Power On?
■Verify that the power supply is functional by substituting a dierent adapter.
■Verify that the power switch on the front of the device is engaged.
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 powered on and connected to a computer before you power on the
computer.
Why Does USRP2 Appear Instead of USRP RIO 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.
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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.
Why Don't NI-USRP Examples Appear in the NI Example Finder?
NI-USRP does not install examples into the NI Example Finder.
You can access the NI-USRP examples from the following locations:
■In LabVIEW Communications System Design Suite 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.
Direct Connections to the USRP RIO
The USRP RIO is an RF instrument that is sensitive to ESD and transients. Ensure you
take the following precautions when making direct connections to the USRP RIO to
avoid damaging the device.
Caution Apply external signals only while the USRP RIO is powered on.
Applying external signals while the device is powered o may cause
damage.
■ Ensure you are properly grounded when manipulating cables or antennas
connected to the USRP RIO TX 1 RX 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 RIO TX 1 RX 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 RIO TX 1 RX 1, RX 1, or RX 2 connector.
© National Instruments 15
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USRP-2950
Figure 5. USRP-2950 Front Panel
LINK
TX OUTPUT MAX +20 dBm, RX INPUT MAX -15 dBm, ALL RF PORTS 50 Ω
TX1 RX1 RX2GPSPPSREF
TX1 RX1 RX2
JTAG
PWR
Connector Use
JTAG A USB port that connects the host computer to the device FPGA for recovery
purposes. This port can be used with the Xilinx iMPACT configuration tool to
temporarily load a new bitfile.
RF 0 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.
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.
AUX I/O General-purpose I/O (GPIO) port. AUX I/O is controlled by the FPGA.
RF 1 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.
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.
Table 15. USRP-2950 Module Front Panel Connectors
Note The LED indications described in the following table occur only
when you use the NI-USRP API with the default API image. When you use
LabVIEW FPGA, you customize the LED indications.
LED Description Color State Indication
RF 0 TX1
RX1
Indicates the transmit status
of the module.
OFF — The module is not active.
Red Solid The module is transmitting data.
Green Solid The module is receiving data.
RX2 Indicates the receive status
of the module.
OFF — The module is not receiving.
Green Solid The module is receiving.
REF Indicates the status of the
reference signal.
OFF — There is no reference signal, or
the device is not locked to the
reference signal.
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LED Description Color State Indication
Green Blinking The device is not locked to the
reference signal.
Solid The device is locked to the
reference signal.
PPS Indicates the pulse per
second (PPS).
OFF — There is no PPS timing reference
signal, or the device is not locked
to the reference signal.
Green Blinking The device is locked to the PPS
timing reference signal.
GPS Indicates whether the
GPSDO is locked.
OFF — There is no GPSDO or the GPSDO
is not locked.
Green Solid The GPSDO is locked.
LINK Indicates the status of the
link to a host computer.
OFF — There is no link to a host
computer.
Green,
yellow, or
red
Solid The host is actively
communicating with the device.
RF 1 TX1
RX1
Indicates the transmit status
of the module.
OFF — The module is not active.
Red Solid The module is transmitting data.
Green Solid The module is receiving data.
RX2 Indicates the receive status
of the module.
OFF — The module is not receiving.
Green Solid The module is receiving.
Table 16. USRP-2950 Module LEDs
Figure 6. USRP-2950 Module Back Panel
0 1
PWR REF
IN
PPS
OUT
TRIG
5V DC
REF
OUT
1G/10G ETH
3.3 V +15 dBm
MAX
9-16V DC
7.5 A MAX
SFP+Ports
PCIe x4
TRIG
3.3V
IN
5V MAX
PPS GPS
ANT
–15 dBm
MAX
Connector Use
PWR Input that accepts a 9 V to 16 V, 6 A external DC power connector.
1G/10G ETH Two SFP+ input terminals used for 1G ETH or 10G ETH connectivity with the host
driver. Not currently supported in LabVIEW FPGA.
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Connector Use
REF OUT Output terminal for an external reference signal for the LO on the device. REF OUT
is a female SMA connector with an impedance of 50 Ω, and it is a single-ended
reference output. The output signal at this connector is 10 MHz at 3.3 V.
REF IN Input terminal for an external reference signal for the LO on the device. REF IN is a
female SMA connector with an impedance of 50 Ω, and it is a single-ended
reference input. REF IN accepts a 10 MHz signal with a minimum input power of
0 dBm (0.632 Vpk-pk) and a maximum input power of 15 dBm (3.56 Vpk-pk) for a
square wave or sine wave.
PCIe x4 Port for a PCI Express Generation 1, x4 bus connection through an MXI Express
four-lane cable.
PPS TRIG
OUT
Output terminal for the pulse per second (PPS) timing reference. PPS TRIG OUT is
a female SMA connector with an impedance of 50 Ω, and it is a single-ended input.
The output signal is 0 V to 3.3 V TTL. You can also use this port as triggered output
(TRIG OUT) that you program with the PPS Trig Out I/O signal.
PPS TRIG IN Input terminal for pulse per second (PPS) timing reference. PPS TRIG IN is a female
SMA connector with an impedance of 50 Ω, and it is a single-ended input channel.
PPS TRIG IN accepts 0 V to 3.3 V TTL and 0 V to 5 V TTL signals. You can also use
this port as a triggered input (TRIG IN) that you control using NI-USRP soware.
GPS ANT Input terminal for the GPS antenna signal. GPS ANT is a female SMA connector
with a maximum input power of -15 dBm and an output of DC 5 V to power an
active antenna.
Caution Do not terminate the GPS ANT port if you do not use it.
Table 17. USRP-2950 Module Back Panel Connectors
USRP-2952
Figure 7. USRP-2952 Front Panel
LINK
TX OUTPUT MAX +20 dBm, RX INPUT MAX -15 dBm, ALL RF PORTS 50 Ω
TX1 RX1 RX2GPSPPSREF
TX1 RX1 RX2
JTAG
PWR
Connector Use
JTAG A USB port that connects the host computer to the device FPGA for recovery
purposes. This port can be used with the Xilinx iMPACT configuration tool to
temporarily load a new bitfile.
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Connector Use
RF 0 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.
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.
AUX I/O General-purpose I/O (GPIO) port. AUX I/O is controlled by the FPGA.
RF 1 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.
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.
Table 15. USRP-2952 Module Front Panel Connectors
Note The LED indications described in the following table occur only
when you use the NI-USRP API with the default API image. When you use
LabVIEW FPGA, you customize the LED indications.
LED Description Color State Indication
RF 0 TX1
RX1
Indicates the transmit status
of the module.
OFF — The module is not active.
Red Solid The module is transmitting data.
Green Solid The module is receiving data.
RX2 Indicates the receive status
of the module.
OFF — The module is not receiving.
Green Solid The module is receiving.
REF Indicates the status of the
reference signal.
OFF — There is no reference signal, or
the device is not locked to the
reference signal.
Green Blinking The device is not locked to the
reference signal.
Solid The device is locked to the
reference signal.
PPS Indicates the pulse per
second (PPS).
OFF — There is no PPS timing reference
signal, or the device is not locked
to the reference signal.
Green Blinking The device is locked to the PPS
timing reference signal.
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LED Description Color State Indication
GPS Indicates whether the
GPSDO is locked.
OFF — There is no GPSDO or the GPSDO
is not locked.
Green Solid The GPSDO is locked.
LINK Indicates the status of the
link to a host computer.
OFF — There is no link to a host
computer.
Green,
yellow, or
red
Solid The host is actively
communicating with the device.
RF 1 TX1
RX1
Indicates the transmit status
of the module.
OFF — The module is not active.
Red Solid The module is transmitting data.
Green Solid The module is receiving data.
RX2 Indicates the receive status
of the module.
OFF — The module is not receiving.
Green Solid The module is receiving.
Table 16. USRP-2952 Module LEDs
Figure 8. USRP-2952 Module Back Panel
0 1
PWR REF
IN
PPS
OUT
TRIG
5V DC
REF
OUT
1G/10G ETH
3.3 V +15 dBm
MAX
9-16V DC
7.5 A MAX
SFP+Ports
PCIe x4
TRIG
3.3V
IN
5V MAX
PPS GPS
ANT
–15 dBm
MAX
Connector Use
PWR Input that accepts a 9 V to 16 V, 6 A external DC power connector.
1G/10G ETH Two SFP+ input terminals used for 1G ETH or 10G ETH connectivity with the host
driver. Not currently supported in LabVIEW FPGA.
REF OUT Output terminal for an external reference signal for the LO on the device. REF OUT
is a female SMA connector with an impedance of 50 Ω, and it is a single-ended
reference output. The output signal at this connector is 10 MHz at 3.3 V.
REF IN Input terminal for an external reference signal for the LO on the device. REF IN is a
female SMA connector with an impedance of 50 Ω, and it is a single-ended
reference input. REF IN accepts a 10 MHz signal with a minimum input power of
0 dBm (0.632 Vpk-pk) and a maximum input power of 15 dBm (3.56 Vpk-pk) for a
square wave or sine wave.
PCIe x4 Port for a PCI Express Generation 1, x4 bus connection through an MXI Express
four-lane cable.
PPS TRIG
OUT
Output terminal for the pulse per second (PPS) timing reference. PPS TRIG OUT is
a female SMA connector with an impedance of 50 Ω, and it is a single-ended input.
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