No lol You're not stupid, those are concepts that you learn when you go deeper into calibration. I'll try to make it simple: a TPG displays a color by mixing red, green and blue, that mix is called RGB triplet (stimulus). Let's say I want to display a red(ish) color which RGB triplet is 255, 128, 128 (this is red 100% luminance, 50% saturation), if the TPG I'm using has a bit perfect output a signal analyzer will "read" R 255, G 128, B 128; if it's not it will "read" 254, 127, 127 for example. That means that you will not measure the stimulus (RGB triplet) the software is asking for and that will introduce error. How big is that error depends on how inaccurate is the TPG output. Ted's patterns are bit accurate so if you use them with a Bluray player, you will have bit accurate patterns. If you want to use Apple TV 4k, use it with LS connect (it works with CalMAN also) with RGB High video output setting.
T.U.C. Master | TVs: Pioneer PDP-LX5090H, LG OLED55C8PLA | AV Receiver: Pioneer VSX-921 | BD Player: Panasonic DMP-BDT260EG | External LUT box: Entertainment Experience eeColor | Softwares: Light Illusion Lightspace HTP, CM Enthusiast, HCFR, DisplayCAL | Probes: Klein K10-A, Jeti spectraval 1501, X-Rite i1 Display Pro OEM Rev. B-02 | Test Pattern Generator: Riccardo Biasiotto’s PGenerator (RPi)