V-band spectrum analysis using world’s smallest handheld analyzer


So here today we have a setup of HDMI
extender over 60GHz or WiGig. So this is the the main transmitter and over
there we have a receiver at the TV screen and we’re gonna use the SAF Tehnika V-band spectrum analyzer a compact one to measure beamforming,
Power-in-band, essentially currently that for us is a black box with no specifications
available out there so we’ll try to detect what is it actually doing what is
the power that is emitting at this location or any other location and we’ll
try to look at several trace modes as Max-hold, cumulative and see how it
behaves in different polarizations. so here we have a tripod where we can mount the unit to and first we can look at the full span to see is it transmitting
at all anything and in what frequencies it is transmitting. So for the measurement
here we have a fixed small antenna which is good enough for this small distance
and we can set it up for measuring a power-in-band so that the Integra power
under the channel bandwidth. We know that for the WiGig the channel bandwidth is 2.19 GHz, so we
can set it up here on the center frequency that we’re
measuring and measure that currently we are seeing a good receive signal and
when we do the alignment we can see how the signal goes up and down and how
the actual measurement differs from the Max Hold feature that we have here. The
system here shows what is the measured signal at the current location and what
was the maximum power-in-band measurement at the maximum peak of the transmitted
signal. Similarly by changing up we can change of course not only angles but we
can easily move around the room and analyze the environment that currently that unit is being transmitting. So that will allow you to characterize and see is the
beam forming working or not so you will see does it have that direct beam to the
receiver or is it using some reflections or is it enabling more transmissions or
what is it actually doing there. Besides Power-in-band we can check also
polarization. So for example with this tripod or you can hold it on the
hand you can rotate the polarization and
we can see that for this particular equipment the measurements on the
horizontal polarization drop dramatically so we see that it actually
mainly using the vertical polarization instead of the horizontal polarization.
Any measurement you can you are doing here you can actually save it
the single scan or you can record entire measurement process. So for example in
the measurement process you can decide you want to add an attenuation in between the transmitter or receiver or you can rotate the transmitter to see how the beam forming operates or you can move the spectrum analyzer itself around the unit
under test to see how the the power is received in that
environment is it reflective is it direct and what is its power
measurements in each location. After you’ve done all the measurements either
in the scans or the recording mode you can post process them in the included
software and and do all the same operations as on the unit itself so you
can do Power-in-band you can add markers you can change the trace mode you can zoom
in zoom out by changing the span and all those measurements you can easily add to
the reporting tool so which is also included in software and start building
a very simple report of your measurements. Thank you for watching. Bye!

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