Table 17. USRP-2945 Module Back Panel Connectors (Continued)
Connector Use
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 a female SMA
connector with a maximum input power of -15 dBm and an output of
DC 5 V to power an active antenna.
Caution Do not terminate the GPS ANT port if you do not use
it.
USRP-2940/2942/2943/2944/2945 Getting Started Guide | © National Instruments | 31
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