... Its database stores 89 ITU standard wavelength channels ( C band 0.4nm gallery interval ). Users can achieve the selection, ... NGB ) external modulation optical transmitter. Product features Full C-Band tunable, tunable range >35nm0.4nm interval, 89 ITU channels, ... (±0.012nm)Excellent side mode suppression, high extinction ratioLow noise, narrow linewidth ( Typ.=0.3MHz )Working frequency bandwidth up ...