WEBVTT
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Hi, I'm Alejandro, an engineer
with National Instruments.

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And today I want to show you
how to use the Vector Signal

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Transceiver and the NI
Wireless Lan Measurement Suite

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to generate and analyze a
two by two 808.11ax signal.

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In my PXI setup, I have two
Vector Signal Transceivers.

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The Vector Signal
Transceiver is an instrument

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that allows me to both generate
and analyze wideband RF

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signals.

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So here I can generate a two
by two 802.11ax MIMO signal.

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Now let's take a
look at the software.

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I have here the wireless Lan
Generation Soft Front Panel,

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an interactive tool that allows
me to control all aspects

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of the 802.11ax generation.

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For example, I have control
of both generators here.

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I can configure the
channel to be 80 megahertz.

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And I can define the type
of PPDU that I'm generating.

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In this case, it's
a multi-user PPDU.

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And I have the
complete flexibility

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to change the OFDA allocation
for multi-user operation.

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In this case, I've chosen to
split up the first 20 megahertz

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of the channel into nine users.

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It also gives me the
flexibility to indicate

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the type of modulation
encoding set that I

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want to use for each one.

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So I've chosen both BPSK
for the first nine users

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and 1024-QAM for the
last three users.

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As soon as I close
that, the sofeware panel

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begins to download the
waveform to the Vector Signal

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Transceivers to generate the
stimulus signal that I'm going

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to present to the analyzer.

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Let's go now to the
Analysis Soft Front panel.

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The generator is already
generating the waveform

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that we configured.

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Now the analyzer is
automatically detecting

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the type of packet that it
is receiving, in this case,

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an 802.11ax packet with multiple
users that we can see here.

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So here is the
allocation divided

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into nine users for the
first 20 megahertz and then

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the three additional users
taking each 20 megahertz.

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It also shows me the
constellation, 1024-QAM.

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The Soft Front Panel allows
me to see different types

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of measurements.

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For example, we're looking
here at the modulation quality

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of the 1024-QAM signals.

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But I can also select
Transmitted Power

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or Spectral Measurements.

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You can also extend
this capability

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to test, validate,
and characterize

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your devices with the full API.

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To learn more, visit ni.com/vst.

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