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.
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NI USRP-2900/2901 Getting Started Guide
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© National Instruments
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