What Should I Do if the NI 5622 IF Digitizer Module Does Not
Phase-Lock to the NI 5652 LO Source Module?
If the NI 5622 IF digitizer module fails to phase-lock to the NI 5652 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 NI 5652 REF IN/OUT front
panel connector.
If there is a frequency reference signal coming from the NI 5652 REF IN/OUT front
panel connector, the NI 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 NI 5652 hardware. Contact NI technical support or visit
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 NI 5663E.
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 NI 5663E Modules
on page 8
Configuring the NI 5663E in MAX
on page 18
Measurements
What Should I Do if the Device Amplitude Reading Does Not
Match the Source?
1.
Verify that the discrepancy between the NI 5663E and the source is within the error limits
of the devices.
a)
Verify the absolute amplitude accuracy of the NI 5663E 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.
3.
Perform a self-calibration for the NI 5663E.
If errors continue, contact NI technical support or visit
.
NI PXIe-5663E Getting Started Guide
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© National Instruments
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