NI PXIe-5653 Calibration Procedure
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© National Instruments
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7
8.
Calculate the deviation using the following formula:
9.
Ensure that the result in step 8 is less than the result of the following formula:
Initial Accuracy
+
Aging
+
Temperature Stability
where
Initial Accuracy
=
Aging
=
Temperature Stability
=
10. Close the device session.
Verifying 10 MHz Reference Amplitude Accuracy
This verification ensures that the internal 10 MHz reference circuitry is adjusted for correct
amplitude accuracy. Complete the following procedure to determine the as-found status of the
NI 5653.
1.
Connect the NI 5653 REF OUT 10 MHz front panel connector to the power meter.
2.
Connect the signal source analyzer REF IN rear panel connector to any rubidium frequency
reference output connector.
3.
Create a new device session for the NI 5653.
4.
Set the RF frequency to 4 GHz and commit the settings to hardware.
5.
Check the signal generation status and verify that there are no reported errors or warnings.
6.
After correcting for the measurement frequency, use the power meter to measure the
NI 5653 REF OUT 10 MHz front panel connector power. Ensure that the power is between
1 dBm and 10 dBm.
7.
Close the device session.
Verifying 100 MHz Reference Frequency Accuracy
This verification ensures that the internal 100 MHz reference circuitry is adjusted for correct
frequency accuracy. Complete the following procedure to determine the as-found status of the
NI 5653.
1.
Connect the NI 5653 REF OUT 100 MHz front panel connector to the signal source
analyzer RF IN front panel connector.
2.
Connect the signal source analyzer REF IN rear panel connector to any rubidium frequency
reference output connector.
3.
Create a new device session for the NI 5653.
4.
Set the RF frequency to 4 GHz and commit the settings to hardware.
5.
Check the signal generation status and verify that there are no reported errors or warnings.
Δ
f
f
measured
MHz
(
)
110
MHz
–
110
MHz
-------------------------------------------------------------------
=
50 10
9
–
×
100 10
9
–
×
Year
--------------------------
NumberofYearsSinceLastAdjustment
×
10 10
9
–
×