NI PXI-5660 Getting Started Guide
22
ni.com
Configuration
RF Vector Signal Analyzer Does Not Initialize
Failure to initialize may indicate a problem with module interconnection or with MAX. If the RF vector
signal analyzer fails to initialize, complete the following steps:
1.
Reconnect the RF vector signal analyzer hardware module front panel cables securely as shown in
your device chapter.
2.
Power on your system and run the MAX configuration and self-test procedures in the
Configuring and Programming the NI 5660
section.
3.
If failures continue, contact NI technical support or visit
ni.com/support
.
NI 5600 RF Downconverter STATUS LED Does Not Light
If the RF vector signal analyzer is programmed to lock to an external reference source or to the PXI
backplane but the STATUS light does not indicate a phase locked status, check for the following errors:
•
Verify that a cable is connected from the external source or the PXI 10 MHZ I/O connector to the
FREQ REF IN connector.
•
Ensure that the external source signal is large enough—typically greater than –10 dBm.
•
Ensure the external source signal falls within the specified frequency accuracy.
If you programmed the RF vector signal analyzer to use the NI 5600 RF downconverter module internal
timebase, check for the following errors:
•
If the RF vector signal analyzer measures the frequency incorrectly or detects no signal when one
is supplied, one or more of the local oscillators is not phase-locked.
•
If the RF vector signal analyzer measures the frequency correctly but the LED does not light, there
could be a driver software error or the LED is damaged.
•
If failures continue, contact NI technical support or visit
ni.com/support
.
The NI 5620/5142 IF Digitizer Module Does Not Phase-Lock to the RF Downconverter Module
If you programmed the IF digitizer module to phase-lock to the NI 5600 RF downconverter module
internal reference through the front panel and you encounter failure, check for the following errors:
1.
Verify that the cable is not faulty.
2.
Ensure that there is a reference signal output from the NI 5600 10 MHZ OUT front panel
connectors.
3.
If there is no signal at these output terminals, contact NI technical support or visit
ni.com/
support
.
If you programmed the IF digitizer module to phase-lock to the PXI backplane driven by the NI 5600
RF downconverter module internal reference and you encounter failure, check for the following errors:
•
Ensure that the NI 5600 is in Slot 2 of the PXI chassis, immediately adjoining the PXI controller
slot.
•
Verify that the PXI 10 MHZ I/O connector is securely wired to one of the 10 MHz OUT connectors
using the included cable, as shown in your device chapter.
•
Verify that the
drive backplane clock
parameter of the ni5660 Configure Reference Clock VI is
set to TRUE.
If failures or errors continue, contact NI technical support or visit
ni.com/support
.
