Table Of Contents

USRP-2974 Front Panel, Back Panel, and LEDs

Version:
    Last Modified: April 19, 2018

    Front Panel


    Table 1. Connector Descriptions
    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.
    DP DisplayPort connector to connect one monitor for your controller.
    USB2.0 USB ports that support common USB peripheral devices such as flash drives, hard drives, keyboards, and mice.
    USB3.0 USB ports that support common USB peripheral devices such as flash drives, hard drives, keyboards, and mice.
    1G ETH RJ45 port used for 1G ETH connectivity to other ethernet devices.
    μUSB USB port used for UART connectivity to the controller.
    1G/10G ETH 0 SFP+ port used for 10G ETH connectivity to other ethernet devices. Connects to the embedded Linux computer for communication with LabVIEW RT.
    1G/10G ETH 1 SFP+ port used for 1G/10G ETH connectivity to other ethernet devices. Connects to the FPGA. Not currently supported in LabVIEW Communications System Design Suite.
    Table 2. LEDs
    LED Description Color State Indication
    RF 0 TX1 RX1 Indicates the transmit status of the device. OFF The device is not active.
    Red Solid The device is transmitting data.
    Green Solid The device is receiving data.
    RX2 Indicates the receive status of the device. OFF The device is not receiving data.
    Green Solid The device is receiving data.
    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.
    GPS Indicates whether the GPSDO is locked. OFF There is no GPSDO or the GPSDO is not locked.
    Green Solid The GPSDO is locked.
    RF 1 TX1 RX1 Indicates the transmit status of the device. OFF The device is not active.
    Red Solid The device is transmitting data.
    Green Solid The device is receiving data.
    RX2 Indicates the receive status of the device. OFF The device is not receiving data.
    Green Solid The device is receiving data.
    STATUS Indicates the status of the device. OFF The device initialized successfully and is ready for use.
    Red Blinking Hardware error. An internal power supply has failed. Check front-panel I/O connections for shorts. Remove any shorts and cycle power to the USRP-2974. Contact NI if the problem persists.
    PWR Indicates the power status of the device. OFF The device is powered off.
    Green Solid The device is powered on.
    10/100/1000 Indicates the speed of the Gigabit Ethernet link. OFF No link, or 10 Mbps link.
    Green Solid 100 Mbps link.
    Amber Solid 1,000 Mbps link.
    ACT/LINK Indicates the Gigabit Ethernet link activity or status. OFF No link has been established.
    Green Solid A link has been negotiated.
    Blinking Activity on the link.
    1G/10G ETH 0 ACT/LINK Indicates the status of the SFP+ port. OFF The link is down.
    Green Solid The link is up.
    Blinking The link is active (transmitting and receiving).
    10GbE Indicates the status of the 10G ETH link. OFF The 10G ETH link is down.
    Green Solid The 10G ETH link is up.
    1G/10G ETH 1 10GbE Indicates the status of the 10G ETH link. OFF The 10G ETH link is down.
    Green Solid The 10G ETH link is up.

    Back Panel


    Table 3. Connector Descriptions
    Connector Use
    REF OUT Output terminal for an external reference signal for the LO on the device. REF OUT is an SMA (f) 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 an SMA (f) 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.
    PPS TRIG OUT Output terminal for the PPS timing reference. PPS TRIG OUT is an SMA (f) connector with an impedance of 50 Ω and is a single-ended input. The output signal is 0 V to 3.3 V TTL. You can also use this port as a triggered output (TRIG OUT) that you program with the PPS Trig Out I/O signal.
    PPS TRIG IN Input terminal for PPS timing reference. PPS TRIG IN is an SMA (f) connector with an impedance of 50 Ω and 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 software.
    GPS ANT Input terminal for the GPS antenna signal. GPS ANT is an SMA (f) connector with a maximum input power of -15 dBm and an output of DC 5 V to power an active antenna.
    spd-note-notice
    Notice  

    Do not terminate the GPS ANT port if you do not use it.

    PCIe x4 Port for a PCI Express Generation 2, x4 bus connection through an MXI Express four-lane cable. Can be used to connect an external USRP device or external chassis.
    SYSTEM POWER IN Input that accepts a 15 V ± 5%, 10 A external DC power connector.

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