Front Panel and Connectors

NI-USRP Help

Edition Date: March 2018

Part Number: 373380J-01

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This section describes the connectors and LED indicators on the USRP-2944 device front panel.

USRP-2944 front panel
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.

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.

LED Indication
RF 0 TX1/RX1 Indicates the transmit status of the module:

OFF—The module is not active.

RED—The module is receiving data.

GREEN—The module is transmitting data.
RX2 Indicates the receive status of the module:

OFF—The module is not receiving.

GREEN—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.

BLINKING—The device is not locked to the reference signal.

GREEN—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.

BLINKING—The device is not locked to the reference signal.

GREEN—The device is locked to the reference time 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 module:

OFF—The module is not active.

RED—The module is receiving data.

GREEN—The module is transmitting data.
RX2 Indicates the receive status of the module:

OFF—The module is not receiving.

GREEN—The module is receiving.

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