I had a chance to work on the Vizio PQ65F1 over the weekend. A very nice TV for the money and a great choice if the room is bright. The TV was able to hit 2400 nits calibrated in HDR and 687 nits calibrated in SDR.
Here are a few notes. I will update accordingly as I run into more and more of these in the field:
The TV was in a normal Florida living room on a golf course. I used a Murideo Six G, a Klein K10 profiled with an i1Pro2, and CalMAN 18.104.22.168. I used the ISF, HDR10 Calibration, and HDR Analysis workflows.
A few notes:
You CANNOT rely on any measurements with any part of the TVs menu on the screen. The main menu on the left side of the screen will change x,y .002 - .003. The color tuner menu made an even bigger difference...as big as .007. You must take a reading with the menu off screen, then enter the menu and make an adjustment, then exit the menu and re-measure. This made the grayscale and CMS adjustments quite tedious. I didn't get a chance to flatten the gamma because I was running out of time but it is possible by adjusting the R, G, B controls for each of the 11 steps equally. Luckily this particular TV was already fairly linear.
The 11pt white balance and CMS controls are very particular. Be sure to adjust any values one click at a time. If you make large adjustments quickly it will seem as if the TV is not responding.
The brightness control is very aggressive. Factory position is 50. 51 turns the background on the Black PLUGE pattern (video level 16) very gray. Proceed with caution
I was able to calibrate the TV in "Calibrated" mode then rename the mode. This made an entire new mode and "Calibrated" was still available. I actually made 4 modes for this particular client. I am curious to how many modes you can make. Looks like several!
The TV puts out the most light when using 10% windows during the calibration. Here is an example of some measurements:
-LD low - 360 nits
-LD mid - 1266 nits
-LD high - 959 nits
-LD low - 366 nits
-LD mid - 1167 nits
-LD high - 1231 nits
Like Vizio displays in the past, the TV will not show above 235 if the TV is sent a YCbCr signal. If you change the output on the generator to RBG the TV will show above 235. The factory contrast position is 50 and does clip white.
If the TV is sent 3840x2160 there is some edge enhancement even with the sharpness at 0. You can set the sharpness correctly if you send the TV 1920x1080.
The "Calibrated" mode from the factory was 443 nits with a 2.2 gamma
The "Calibrated Dark" mode from the factory was 262 nits with 2.3 gamma
Using a 10% window and the backlight set to max HDR measured 2427 nits while SDR measured 687 nits. This is a bright TV!
Contrast and Brightness in HDR will reshape the EOTF. I got the best results in the "Calibrated" mode with the contrast at 46 and the Brightness at 50 (factory position).
The Color Tuner values are the same regardless of the picture mode
79% rec2020 coverage
98% P3 coverage