National Instruments PXIe-5673, Calibration Procedure

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PXIe-5673 Calibration Procedure | © National Instruments | 21
• Power Level Type: Peak Power
• Reference Clock Source: ClkIn
6. Measure the output noise floor 2 MHz above the generated frequency using the spectrum
analyzer. Minimize the spectrum analyzer noise contribution by using the preamplifier,
minimal attenuation, and a low reference level. Use the following spectrum analyzer
parameter settings:
•
Center frequency: (Frequency in step 5) + 2 MHz
• Reference level: -50 dBm
• Frequency span: 0 Hz
• Resolution bandwidth: 100 kHz
• Sweep time: 5 ms
• Reference clock source: External
• Attenuation: 5 dB
• Preamplifier: On
7. Repeat steps 5 through 6 for the following LO frequency ranges in 250 MHz increments,
including endpoints:
•
PXI-5650: 85 MHz to 1.3 GHz
• PXI-5651: 85 MHz to 3.3 GHz
• PXI-5652: 85 MHz to 6.6 GHz
Store the resulting measurements.
8. Compare the measured values to the corresponding limits in Table 10.
9. Repeat steps 5 through 8 for the remaining output power values listed in Table 10.
If the results are within the selected test limit, the device has passed this portion of the
verification.
Table 10.
Noise Floor Upper Test Limits
Output
Power
(dBm)
PXI-5650/5651/5652 PXI-5651/5652 PXI-5652
LO Frequencies
85 MHz to
250 MHz
LO Frequencies
>
250 MHz to
1.3 GHz
LO Frequencies
>
1.3 GHz to
3.3 GHz
LO Frequencies
>
3.3 GHz to
6.6 GHz
+10 -133 dBm/Hz -134 dBm/Hz -134 dBm/Hz -134 dBm/Hz
0 -140 dBm/Hz -141 dBm/Hz -141 dBm/Hz -141 dBm/Hz
-10 -145 dBm/Hz -145 dBm/Hz -145 dBm/Hz -145 dBm/Hz
-30 -152 dBm/Hz -152 dBm/Hz -152 dBm/Hz -152 dBm/Hz