Now we're gonna show you how to calibrate
the internal 3D LUT of the TVlogic XVM-245W Grade 1 broadcast monitor
we will be using the Color Cube workflow, the SpectraCal C6 meter,
and SpectraCal's VirtualForge pattern generator
I have the workflow open Color Cube 3D LUT
and I already have my meter connected
my meter is already connected, but I need to select the RGB LED mode for the meter
Because this is an RGB LED-backlit display
we're going to search for source which is VirtualForge
We are going to select SpectraCal as the manufacture, VirtualForge
your machine should automatically come up here, but if it doesn't hit Search, I'm going to select it
hit connect, since this is an LCD display I'm using full screen patterns
we're going to go to find 3D LUT device
select TVlogic, and select your your COM port
that your serial adapter is connected to, in this case COM 4, hit connect
this does take a little while because it's over serial
don't be alarmed if it seems like it's taking awhile
now that we are connected
our LUT memory we're gonna select user, we have the same one already selected in the display itself
once you click it, it will take a few moments to switch to that LUT memory
okay now that we have selected the user 3D LUT memory
we will go to next, and select our calibration standard, we are going to use video levels or SMPTE levels
we are going to use BT 1886 as our EOTF or gamma
and HD REC. 709 and D65 as our white point and colorspace
now we will do the pre-calibration measurements to see where it is
this really doesn't apply, we're not gonna see what it was out of the factory because
once you're in that user LUT mode it's essentially
in a native gamut mode, it's not applying any LUT
so if you want to see what your monitor was really doing before you create the LUT
you would select one of the preset and
measure this and then you could switch to the user LUT to see what it's doing in its native mode
before I take the pre-calibration measurements,
I'm going to ensure that our pattern delay is correct by running the pattern delay optimizer
click the center tab which is our pattern generator
and go down to our optimize button, and run optimize procedure, it's all automated
it essentially make sure that when CalMAN goes to take a read
the pattern is fully rendered on the screen, there is some latency in the system and we never know
quite what that latency is unless we actually measured it
and you also don't want it to be to long and have to much delay
or else you are just wasting time, specially when you make a 3D LUT it adds a lot of
time when you taking several thousand reading
now we will run our pre-calibration capture
this part is going to take just a minute or two, we'll come back once it's complete
now we are going to go to our display performance analysis
normally you would want to make all these green, on this display
when you created a 3D LUT for it, it goes into its native mode
which is applying nothing, no correction, no white balance controls or anything like that
it just is what it is, and then all the calibration happens with the 3D LUT
as noted in our quick start guide you can't
do the RGB gains and offset in this display if your going to do a 3D LUT
because of the way that they're in the video path they will actually
make the LUT not work properly, so you want to leave those as a preset, like 6,500 or one of those
you don't want to modify those controls
put into a custom mode or anything like that
since we can not actually optimize the display, we're just going to go to the calibrate cube LUT part
and since this display does not have a 1D LUT we can skip over this step
now we are at the calibrate Cube LUT page, since this is a grade 1 display
that will probably be used for color grading, we are going to run and IRP LUT
just to make sure it gets that extra little bit about accuracy, we will go to AutoCal
I'm going to switch this to IR profile point-based, and I'm going to do 2,000
now I have already ran the pattern delay optimizer
that's where the pattern delay optimizer
If you don't run it you will not get an accurate estimate of how long the actual calibration is going to take
so you want to make sure you do that, now I will hit okay and let it run
now we are going to let CalMAN do its thing, and we will be back after we create the LUT
now that are 3D LUT is complete, its loading it into the TVlogic now and it does have this thing where
it wants you to power cycle the monitor, which is essentially turn it on and turn it off
on the front panel button, not the big switch on the back, and then after it is back on hit the OK button
and now it will be complete
go to next and run our verification
so now we're going to do a read series here, one thing to note that we did not show is
on the TVlogic monitor it can take between 8 and 12 minutes to load the LUT
because it's doing it over serial, so don't be alarmed if it takes a long time
this is going to take just a few dozen readings of color points
so we will come back in a minute or two once all the data is collected
now that our measurements are complete
we have a grayscale DeltaE average of 1.1
and the ColorCheckered DeltaE average of 0.6
if you want to calibrate a different colorspace beside REC. 709
the TVlogic, each of its colorspace settings
not only the user one, but like its REC. 709 or DCIP3
you can write over those with your own LUTs
if you wanted to you can make the REC. 709 preset, REC. 709
and the DCI one write your own DCIP3 LUT over the top
you're not just limited to the user LUT, you can write over the built-in colorspaces, those are their own 3D LUT