NI PXIe-5694 Calibration Procedure
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© National Instruments
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25
5.
Execute a sweep using the spectrum analyzer and record the peak marker reading in the
appropriate
IF OUT Power
cell in Table 6.
6.
Use the following formula to compute the path gain and record it in the corresponding
Path
Gain
cell.
Path Gain = P
SA
-
P
CORR
-
P
REF
where:
P
SA
=
IF OUT Power
recorded in Table 6
P
CORR
= Characterized correction recorded in Table 4 for the configured
frequency
P
REF
= Characterized reference power recorded in Table 4 for the configured
frequency
7.
Repeat steps 4 through 6 for each of the remaining values in the
Device Instantaneous
Bandwidth
column in Table 6.
8.
Reconfigure the spectrum analyzer as follows:
•
Center frequency: 21.4 MHz
•
Span: 0 Hz
•
Reference level: 10 dBm
•
Resolution bandwidth: 10 kHz
•
Video bandwidth: 30 kHz
•
Number of averages: 100
1.4 MHz
Disabled
Enabled
400 kHz
Disabled
Enabled
110 kHz
Disabled
Enabled
Table 6.
Path Gain, Downconversion Disabled (Continued)
Device
Instantaneous
Bandwidth (Path)
Step Gain
IF OUT Power
(dBm)
Path Gain
