National Instruments PXIe-5663E Getting Started page 12

4. Hand-tighten all SMA cable ends on the SMA connectors after the cable center
pins are correctly aligned and connected. The cable connectors should tighten
without much torque or effort. If a cable bends due to incorrect alignment,
remove the cable from the front panel connector and reconnect the cable
center pin on the SMA cable to the SMA connector.
5. Carefully complete tightening all SMA connectors to 1 N · m using an
appropriate torque wrench (not included) or torque screwdriver and SMA
driver bit. Tighten only until the wrench clicks.
Caution
fidelity and phase-locked loop (PLL) performance and may cause
insertion loss. Use an appropriate torque wrench or torque
screwdriver and SMA driver bit to ensure all SMA connections are
properly torqued. SMA connectors for connections to external
equipment may require torque different from 1 N · m, depending on
the connector type, material, and manufacturer.
6. Power on the PXI Express chassis and controller system.
7. Verify that the ACCESS LED is on for all modules.
Direct Connections to the NI 5601
The NI 5601 is a precision RF instrument that is sensitive to ESD and transients.
Ensure you are making proper direct connections to the NI 5601 to avoid damaging
the device.
Caution
Applying external signals while the device is powered off may cause
damage.
Ensure you are properly grounded when manipulating cables or antennas
■
connected to the NI 5601 RF IN connector.
If you are using noninsulated devices, such as an RF antenna, ensure the
■
devices are maintained in a static-free environment.
If you are using an active device, such as a preamplifier or switch routed to
■
the NI 5601 RF IN connector, ensure that the device cannot generate signal
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Incorrect torque at SMA connections can degrade signal
Apply external signals only while the NI 5601 is powered on.
PXIe-5663E Getting Started