8.
If the
ADC Cal Complete
output of niFgen ni5433 Timebase Cal Adjust returns
FALSE
,
repeat steps 3 through 7 until
ADC Cal Complete
returns
TRUE
.
Note
DC voltage adjustment is only required on one channel of the two-channel
PXIe-5423.
Adjusting Passband Flatness
Complete one of the following procedures depending on the channel count of the PXIe-5423
you are adjusting:
•
Adjusting Passband Flatness of a One-Channel PXIe-5423
•
Adjusting Passband Flatness of a Two-Channel PXIe-5423
Adjusting Passband Flatness of a One-Channel PXIe-5423
Follow this procedure to adjust the passband flatness of a one-channel PXIe-5423.
Note
Ensure the power sensor, with the SMA (m)-to-N (f) adapter attached, has
been zeroed within the past hour.
1.
Call niFgen ni5433 Flatness Cal Initialize.
2.
Call niFgen ni5433 Flatness Cal Configure.
3.
Call niFgen ni5433 Flatness Cal Adjust with the following settings:
•
Measured Power (dBm)
: 0 dBm
4.
Connect the power sensor with the SMA (m)-to-N (f) adapter attached to CH 0 of the
PXIe-5423.
5.
Call niFgen ni5433 Flatness Cal Configure to obtain the
Current Configuration
output.
6.
Configure the power sensor with the following settings:
•
Auto range
: Enabled
•
Maximum noise ratio
: 0.005 dB
•
Power measurement
: Continuous average
•
Path selection
: Automatic
•
Averaging
: Automatic
•
Aperture
: 20 ms
•
Timeout
: 10 s
•
Frequency
: Frequency returned by the
Current Configuration
output of niFgen
ni5433 Flatness Cal Configure in the previous step
7.
Wait 1 second for settling.
8.
Measure the power of the signal using the power sensor.
9.
Call niFgen ni5433 Flatness Cal Adjust with the following settings:
•
Measured Power (dBm)
: Power of the waveform present on CH 0 of the
PXIe-5423 and measured by the power sensor in the previous step in dBm
10. If the
Flatness Cal Complete
output of niFgen ni5433 Timebase Cal Adjust returns
FALSE
, repeat steps 5 through 9 until
Flatness Cal Complete
returns
TRUE
.
16
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PXIe-5423 Calibration Procedure
