Rectifiers are also used for detection of amplitude modulated radio signals. This is detected by photodiodes that create corresponding electrical signals. Jitter may be caused by electromagnetic interference and crosstalk with carriers of other signals. Neurons are highly specialized for the processing and transmission of cellular signals. It was wired to accept 7200 analog signals and 6500 digital signals. Clamp diodes are included in CMOS circuits to deal with these signals. This causes some difficulty in determining how to correctly interpret and display some YCbCr signals. Realtime spectrum analyzers are able to see signals hidden behind other signals. Line level sits between other levels of audio signals. Wire harnesses are large groupings of wires used to distribute electrical signals and power. Fossas communicate using sounds, scents, and visual signals. Cephalopods are able to communicate visually using a diverse range of signals. The ability to handle a variety of digital audio signals was added. ROBIN identifies flocks of birds within the signals of large radar systems. Nerves move muscles in response to voluntary and autonomic (involuntary) signals from the brain.