National Instruments PXIe-5665, Getting Started Manual, Page: 30 / 33

2. Power on your system and run the MAX configuration and self-test procedures.
Related Information
Interconnecting the PXIe-5665 Modules on page 8
Configuring the PXIe-5665 in MAX on page 22
What Should I Do if the PXIe-5622 IF Digitizer Module Does Not
Phase-Lock to the PXIe-5653 LO Source Module?
If the PXIe-5622 IF digitizer module fails to phase-lock to the PXIe-5653 LO source module
internal reference through the front panel, complete the following steps:
1. Verify that the cable is not faulty and that all cables are connected to the correct
terminals.
2. Verify that there is a reference signal generated from the PXIe-5653 REF OUT 100 MHz
front panel connector.
If there is a 100 MHz signal coming from the PXIe-5653 REF OUT 100 MHz front panel
connector, the PXIe-5622 phase-lock circuitry may be at fault.
If failures continue and there is no signal at these output terminals, there may be a problem
with the PXIe-5653 hardware. Contact NI technical support or visit ni.com/support .
What Should I Do if the NI-RFSA Soft Front Panel Does Not
Launch?
1. Verify the front panel interconnections for your RF vector signal analyzer.
2. Verify the MAX device association for your PXIe-5665.
3. If you have verified the interconnections and associations of your device and you are still
unable to launch the NI-RFSA SFP, try uninstalling and then reinstalling NI-RFSA.
Related Information
Interconnecting the PXIe-5665 Modules
on page 8
Configuring the PXIe-5665 in MAX on page 22
Measurements
What Should I Do if the Device Amplitude Reading Does Not
Match the Source?
1. Verify that the discrepancy between the PXIe-5665 and the source is within the error
limits of the devices.
a) Verify the absolute amplitude accuracy of the PXIe-5665 using the appropriate
value.
b) Verify the level accuracy of the input signal into the receiver.
2. Check for cable loss, which can be substantial. For example, an RG58 coaxial cable loses
about 2.1 dB of signal amplitude per foot at 2 GHz. Unless you are using high-quality
cables, expect losses when working with high-frequency signals.
PXIe-5665 Getting Started Guide | © National Instruments | 29