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.
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 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.
Table 12. LED Indicators
ni.com
30
USRP-2940/2942/2943/2944/2945 Getting Started