National Instruments PXIe-5668, Руководство по началу работы

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5. 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.
Note If the SMA cable does not exactly align with the SMA connector, bend
the cable slightly by hand to align the cable and the connector. The amount of
bending should be minimal. The cables can be damaged by excessive bending.
6. 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
Incorrect torque at SMA connections can damage device connectors,
degrade signal fidelity and phase locked loop performance, or 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.
7. Power on your PXI Express chassis and controller system. If you are using a MXI device
and a remote controller, ensure that the chassis is powered on prior to triggering the
remote controller. Using the controller system before the chassis is powered on may cause
installed devices to not appear in MAX.
8. Verify that the ACCESS LED is on for all three modules.
Related Information
Troubleshooting on page 28
If an issue persists after you complete a troubleshooting procedure, contact NI technical
support or visit
ni.com/support .
Refer to the NI RF Vector Signal Analyzers Help for information about how to make
connections using an external clock, or how to connect multiple NI 5668R modules.
Direct Connections to the PXIe-5606
The PXIe-5606 is a precision RF instrument that is sensitive to ESD and transients. Ensure
you are making proper direct connections to the PXIe-5606 to avoid damaging the device.
Notice
Apply external signals only while the PXIe-5606 is powered on. 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
PXIe-5606 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
PXIe-5606 RF IN connector, ensure that the device cannot generate signal transients
greater than the RF and DC specifications of the PXIe-5606 RF IN connector.
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