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NI 5421/5441 Calibration Procedure
10. Call
niFgen_ConfigureSampleRate
(niFgen Set Sample Rate VI) using the following
parameters:
•
vi
: The session handle returned from
niFgen_init
•
Sample Rate
: 100 MS/s (
100000000
)
Repeat steps 11 through 20 for each iteration in Table 9, changing the
for each iteration.
11. Create an array of waveform samples. Each waveform should have samples and cycles that
correspond to the current iteration in Table 9.
12. (LabVIEW Only) You must call the Sine Pattern VI to create the array of waveform
samples for step 11. Specify an
amplitude
of 1, and
samples
and
cycles
that correspond to
the current iteration in Table 9. Wire the
Sinusoidal Pattern
output of the Sine Pattern VI
to the
Waveform Data Array
input of the niFgen Create Waveform (DBL) VI in step 13.
13. Call
niFgen_CreateWaveformF64
(niFgen Create Waveform (DBL) VI) using the
following parameters:
•
vi
: The session handle returned from
niFgen_init
•
channelName
:
"0"
•
wfmSize
: The size in samples of the waveform that you created in step 11 or step 12.
•
wfmArray
: The array of waveform samples from step 11 or step 12 (double
representation)
Table 9.
NI 5421/5441 Setup for Direct Analog Path Flatness Verification
Iteration
Frequency
Number of Samples
Number of
Cycles
Published Specification
1
50 kHz
2,000
1
REF
2
100 kHz
1,000
1
- 0.4 dB to +0.3 dB
3
1 MHz
1,000
10
- 0.4 dB to +0.3 dB
4
5 MHz
1,000
50
- 0.4 dB to +0.3 dB
5
10 MHz
1,000
100
- 0.4 dB to +0.3 dB
6
15 MHz
1,000
150
-0.4 dB to + 0.4 dB
7
20 MHz
1,000
200
-0.4 dB to + 0.4 dB
8
25 MHz
1,000
250
- 0.4 dB to +0.6 dB
9
30 MHz
1,000
300
- 0.4 dB to +0.6 dB
10
35 MHz
1,000
350
- 0.4 dB to +0.6 dB
11
40 MHz
1,000
400
- 0.4 dB to +0.6 dB
12
43 MHz
1,000
430
-3.0 dB to +0.6 dB
