Ni Usrp-2942R - National Instruments USRP-29 Series Getting Started Manual

Table 18. NI USRP-2940R Module Back Panel Connectors (Continued)
Connector
REF IN Input terminal for an external reference signal for the LO on the device.
REF IN is an SMA (f) connector with an impedance of 50 Ω and is a
single-ended reference input. REF IN accepts a 10 MHz signal with a
minimum input power of 0 dBm (.632 V
of 15 dBm (3.56 V
PCIe x4 This port accepts a PCI Express Generation 1, x4 bus connection through
an MXI Express four-lane cable.
PPS TRIG Output terminal for PPS timing reference. PPS TRIG OUT is an SMA (f)
OUT connector with an impedance of 50 Ω and is a single-ended input.
PPS TRIG OUT outputs 0 V to 3.3 V TTL. You can also use this port as a
triggered output (TRIG OUT) that you control using NI-USRP software.
PPS TRIG IN Input terminal for PPS timing reference. PPS TRIG IN is an SMA (f)
connector with an impedance of 50 Ω and 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 an SMA (f)
connector with a maximum input power of -15 dBm and an output of
DC 5 V to power an active antenna.

NI USRP-2942R

JTAG
pk-pk
Caution
it.
Figure 16. NI USRP-2942R Front Panel
RF 0
TX1 RX1 RX2 REF PPS
TX OUTPUT MAX +20 dBm, RX INPUT MAX -15 dBm, ALL RF PORTS 50 Ω
Use
) for a square wave or sine wave.
Do not terminate the GPS ANT port if you do not use
NI USRP-2942R
400 MHz - 4.4 GHz
AUX I/O
3.3 VDC MAX
NI USRP-29xx Getting Started Guide | © National Instruments | 35
) and a maximum input power
pk-pk
RF 1
GPS LINK TX1 RX1 RX2
PWR