NI 5122/5124 Calibration Procedure
26
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d.
Compute the power difference using the formula:
power = (20log
10
a
) – (20log
10
b
)
where
a
is the measured RMS voltage in step 12c and
b
is the
measured RMS voltage in step 8.
If the result is within the test limits from Table 10 (NI 5122) or
Table 11 (NI 5124), the device has passed this portion of the
verification.
Move the calibrator test head to the digitizer input channel 1 and repeat
steps 1 through 12, replacing
"0"
with
"1"
for the
channelList
parameter.