NI PXIe-5611 Calibration Procedure
8
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3.
—Perform an external adjustment of the device that adjusts
the calibration constants of the device. The adjustment procedure
automatically stores the calibration date on the EEPROM to allow
traceability.
4.
Reverification
—Repeat the verification procedure to ensure that the
device is operating within its specifications after adjustment.
These procedures are described in more detail in the following sections.
Initial Setup
Refer to the
NI RF Signal Generators Getting Started Guide
for
information about how to install the software and hardware and how to
configure the device in MAX.
Characterizing the Power Splitter
Several procedures in this document require using a splitter that has been
characterized to remove error from future measurements. Complete the
following steps to characterize a splitter using an NI 5652, power meter,
and spectrum analyzer, as shown in Figure 2.
1.
Disconnect the NI 5611 LO IN front panel connector from the NI 5652
RF OUT front panel connector.
2.
Connect the power meter power sensor to the NI 5652 RF OUT front
panel connector.
3.
Generate a tone with the NI 5652 with the following NI-RFSG
property settings:
•
Frequency (Hz): 50 MHz
•
Power Level (dBm): –10 dBm
4.
Use the power meter to measure the output power.
5.
Repeat steps 3 through 4 for every frequency from 50 MHz to 6.6 GHz
in 5 MHz increments, including endpoints. Store the resulting
measurements.
6.
Disconnect the power sensor from the NI 5652 RF OUT front panel
connector.
Caution
If you use a cable, it should be as short as possible. The cable should always be
used with the splitter for subsequent verification procedures in this document that require
a splitter.
7.
Connect the power splitter input port to the NI 5652 RF OUT front
panel connector without a cable, if possible.
