Table Of Contents

USRP-2950 Front Panel, Back Panel, and LEDs

Version:
    Last Modified: June 26, 2018

    Front Panel


    Table 1. Connector Descriptions
    Pin Description
    JTAG A USB port that connects the host computer to the device FPGA for development and debugging. LabVIEW FPGA does not currently support configuring or programming the device FPGA using the JTAG connector.
    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 2. LED Descriptions
    The LED indications described in the following table occur only when you use the NI-USRP API with the default FPGA image. When you use LabVIEW FPGA, you customize the LED indications.
    Pin Description Color Indication
    RF 0 TX1 RX1 Indicates the transmit status of the device. Off The device is not active.
    Red The device is receiving data.
    Green The device is transmitting data.
    RX2 Indicates the receive status of the device. Off The device is not receiving data.
    Green 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 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.

    GPS Indicates whether the GPSDO is locked. Off There is no GPSDO, or the device or the GPS is not locked.
    Green 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/Red The host is actively communicating with the device.
    RF 1 TX1 RX1 Indicates the transmit status of the device. Off The device is not active.
    Red The device is receiving data.
    Green The device is transmitting data.
    RX2 Indicates the receive status of the device. Off The device is not receiving data.
    Green The device is receiving data.

    Back Panel



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    Table 3. Connector Descriptions
    Connector Description
    PWR Input that accepts a 9 V to 16 V, 6 A external DC power connector.
    1G/10G ETH Ethernet port that accepts 1G SFP modules and 10G SFP+ modules. With a 1G ETH module inserted, the ports accept gigabit Ethernet-compatible cables (Category 5, Category 5e, or Category 6).
    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 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-caution
    Caution  

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


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