National Instruments PXIe-5665, Getting Started Manual, Page: 15 / 33

Table 3. PXIe-5603 or PXIe-5605 RF Downconverter Module Front Panel
Connectors (Continued)
Connector Use
LO3 IN Connects to the LO3 OUT connector on the PXIe-5653 module front panel.
This connector is the input terminal for the LO3 (800 MHz) source. LO3 IN is
an SMA connector with an impedance of 50 Ω (nominal) and a maximum safe
power level of +15 dBm. The maximum safe voltage is 25 VDC.
LO1 OUT Output terminal for the LO1 (3.2 GHz to 8.3 GHz) source. In multichannel
systems, LO1 OUT exports the signal received at LO1 IN to other PXIe-5603 or
PXIe-5605 modules. LO1 OUT is disabled by default. LO1 OUT is an SMA
connector with an impedance of 50 Ω (nominal) and a maximum safe power
level of +15 dBm. The maximum safe voltage is 25 VDC.
LO2 OUT Output terminal for the LO2 (4 GHz) source. In multichannel systems, LO2
OUT exports the signal received at LO2 IN to other PXIe-5603 or PXIe-5605
modules. LO2 OUT is disabled by default. LO2 OUT is an SMA connector with
an impedance of 50 Ω (nominal) and a maximum safe power level of +15 dBm.
The maximum safe voltage is 25 VDC.
LO3 OUT Output terminal for the LO3 (800 MHz) source. In multichannel systems, LO3
OUT exports the signal received at LO3 IN to other PXIe-5603 or PXIe-5605
modules. LO3 OUT is disabled by default. LO3 OUT is an SMA connector with
an impedance of 50 Ω (nominal) and a maximum safe power level of +15 dBm.
The maximum safe voltage is 25 VDC.
Note
LO1 OUT, LO2 OUT, and LO3 OUT enable phase-coherent operation of
multiple devices by allowing you to use common LO signals when daisy-chaining
the signals to other RF downconverter modules. When you are not using the
LO OUT connectors, connect a 50 Ω termination load to each of these connectors.
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