📄 generating standard waveforms with the ni 5401-ni 5411- ni 5431 function generator - example - development library - national instruments.htm
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<P><SPAN class=title1>Generating Standard Waveforms with the
NI 5401/NI 5411/ NI 5431 Function Generator</SPAN> </P></TD></TR><!--stopindex-->
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<P>This LabVIEW Example generates standard waveforms such as a
sine, square, ramp, or DC signal. There are controls on the
front panel to control the frequency, amplitude, offset, and
type of waveform generated. For the NI 5401 and NI 5411, the
maximum sine frequency you can generate is 16 MHz. For the NI
5431, the maximum frequency is limited to 8 MHz. The maximum
amplitude is 5 Vpk into a 50 ohm load. If the load is a
high-impedance load, the actual levels are twice that shown on
the front panel.<BR><BR>The waveforms are created using the
Direct Digital Synthesis (DDS) technique, used for deriving,
under digital control, an analog frequency source from a
single reference clock frequency. This technique produces
high-frequency accuracy and resolution, temperature stability,
wideband tuning, and rapid and phase-continuous frequency
switching.<BR><BR>The NI 5401/5411/5431 uses a 32-bit,
high-speed accumulator with a lookup memory and a 12-bit DAC
for DDS-based waveform generation.<BR><BR>The lookup memory is
dedicated to the DDS mode only and cannot be used in Arb mode.
You can store one cycle of a periodic waveform; a sine,
triangular, square, or periodic arbitrary wave in the lookup
memory. Then, you can change the frequency of that waveform by
sending just one instruction. You can use DDS mode for very
fine frequency resolution function generation. You can
generate sine waves of up to 16 MHz for the NI 5401 and the NI
5411 and 8 MHz for NI 5431 with a frequency resolution of 9.63
mHz. Because this mode uses an accumulator, waveform
generation loops back to the beginning of the lookup memory
after passing through the end of the lookup
memory.<BR></P></TD></TR></TBODY></TABLE>
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<TD class=tableheader colSpan=3><STRONG>Software
Requirements</STRONG></TD></TR>
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<TD vAlign=top noWrap width=180><STRONG>Application
Software:</STRONG> </TD>
<TD width="100%">LabVIEW Full Development System 6.1<BR></TD></TR>
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<TD vAlign=top><STRONG>Toolkits and Add-ons:</STRONG></TD>
<TD></TD></TR>
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<TD vAlign=top><STRONG>Additional Software:</STRONG> </TD>
<TD></TD></TR>
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<TD vAlign=top><STRONG>Language(s):</STRONG></TD>
<TD>LabVIEW</TD></TR>
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<TD class=tableheader colSpan=3><STRONG>Hardware
Requirements</STRONG> </TD></TR>
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<TD vAlign=top noWrap width=180><STRONG>Hardware
Group:</STRONG> </TD>
<TD width="100%">Signal Source (AWG/FG/AO)</TD></TR>
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<TD vAlign=top><STRONG>Model:</STRONG> </TD>
<TD>PCI-5401<BR>PCI-5411<BR>PCI-5431<BR>PXI-5401<BR>PXI-5411<BR>PXI-5431
</TD></TR>
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<TD vAlign=top><STRONG>Driver:</STRONG> </TD>
<TD>Traditional NI-DAQ 7.0<BR>NI-FGEN 2.1<BR></TD></TR>
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<TD vAlign=top><STRONG>Additional Hardware:</STRONG> </TD>
<TD><BR></TD></TR>
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