PPM error

I have an HItec Optima 9 rx with a ver 2 encoder. When I try to calibrate my tx the calibration bars on MP are grayed out. I checked th rx on my 2.5 board and it is functioning properly. Is the led on the encoder supposed to be on all the time? I check voltage across pin at 4.3VDC. I am running it on PH and firmware loaded fine. I am powering off a powered usb hub.

Battery must be conneted as well as usb to fire up the encoder, that’s a pain. Can this be noted in the wiki?