Table 5. USRP-2940 Module Back Panel Connectors (Continued)
Connector
Use
PPS TRIG OUT Output terminal for the pulse per second (PPS) timing reference. PPS
TRIG OUT is a female SMA connector with an impedance of 50 Ω, and it
is a single-ended input. The output signal is 0 V to 3.3 V TTL. You can
also use this port as triggered output (TRIG OUT) that you program with
the PPS Trig Out I/O signal.
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-2942
Figure 7. USRP-2942 Front Panel
LINK
TX OUTPUT MAX +20 dBm, RX INPUT MAX -15 dBm, ALL RF PORTS 50
Ω
TX1 RX1
RX2
GPS
PPS
REF
TX1 RX1
RX2
JTAG
PWR
16
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USRP-2940/2942/2943/2944/2945 Getting Started Guide
