Connector
Use
REF IN
Input terminal for an external reference signal for the local oscillator (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.
USB
Input that accepts a standard USB cable. A suitable USB cable is included in
the hardware kit.
PPS IN
Input terminal for pulse per second (PPS) timing reference. PPS IN is a female
SMA connector with an impedance of 50 Ω, and it is a single-ended input
channel. PPS IN accepts 0 V to 3.3 V TTL and 0 V to 5 V TTL signals.
PWR
Input that accepts a 6 V, 3 A external DC power connector.
NI USRP-2901 Connectors and LEDs
Figure 5.
NI USRP-2901 Front Panel
NI USRP-2901
70 MHz–6 GHz
ESD
SENSITIVE
RF 0
TX1 RX1
RX2
RF 1
TX1 RX1
RX2
Designed by Ettus Research
TX OUTPUT MAX +20 dBm, RX INPUT MAX –15 dBm, ALL RF PORTS 50
Ω
Table 3.
NI USRP-2901 Module Front Panel Connectors
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.
RF 1 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.
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.
NI USRP-2900/2901 Getting Started Guide
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© National Instruments
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