Crosstalk is an electrical effect and can be quantified with a crosstalk measurement. Jitter may be caused by electromagnetic interference and crosstalk with carriers of other signals. The interference FWM caused in WDM systems is known as interchannel crosstalk. Evidence for crosstalk between the extrinsic and intrinsic pathways exists in the Fas signal cascade. Companding also reduces the noise and crosstalk levels at the receiver. The approximation improves as crosstalk weakens and harmonic number increases. Traditional flexible borescopes suffer from pixelation and pixel crosstalk due to the fiber image guide. This would most likely result in unacceptable levels of hum, crosstalk and noise. This cancels the capacitive crosstalk between the two pairs. Diffraction can be a major cause of crosstalk. Electrical pickup between analog circuits (crosstalk) is yet another. One thus wants to minimize crosstalk between the two. Again, this is likely a result of "crosstalk" between signaling pathways. Trigger sensor/reliability and reduction of crosstalk have been vastly improved. There is a significant level of crosstalk and functional overlap between the Gli TFs.