A single channel device is also unable to detect changes in {TAIL ~ the chromaticity} of one or more of the channels of the display if the spectral energy distribution of {HEAD ~ said channel changes} in shape 
A single channel device is also unable to detect changes in { TAIL ~ the chromaticity } of one or more of the channels of the display if the spectral energy distribution of { HEAD ~ said channel changes } in shape
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH