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National Instruments Corporation
39
NI 5450 Calibration Procedure
17. Calculate the power difference using the following formula:
power = (20log
10
a
) – (20log
10
b
)
where
a =
the
Measured RMS Voltage of Generated Sine Wave
b =
the
Measured RMS Voltage of 51 kHz Sine Wave
If the result is within the test limits in Table 12 (NI 5152), Table 13
(NI 5153), or Table 14 (NI 5154), the device has passed this portion of
the verification.
18. Disable Time Interleaved Sampling using the niScope Property Node.
19.
Repeat steps 2 through 18 for each iteration in
Table 12 (NI 5152),
Table 13 (NI 5153), or Table 14 (NI 5154)
.
20. Move the calibrator test head to the channel 1 input of the digitizer and
repeat steps 2 through 19. changing value of the
channelList
parameter from
"0"
to
"1"
.
21. End the session using the niScope Close VI.
You have finished verifying the bandwidth of the NI 5152/5153/5154.
LabVIEW VI
C/C++ Function Call
Call
niScope_SetAttribute
ViBoolean
with the following
parameters:
vi
: The instrument handle from
niScope_init
channelList
:
"0"
attributeID
:
NISCOPE_ATTR_
ENABLE_TIME_INTERLEAVED_
SAMPLING
value
:
NISCOPE_VAL_FALSE
LabVIEW VI
C/C++ Function Call
Call
niScope_close
with the following
parameters:
vi
: The instrument handle from
niScope_init