Types: M21415A, M21415A5, M21415C Nominal frequency (MHz): 17.9, 21.4 Pole numbers: 2, 2, 6 Channel spacing (kHz): 25 Passband width (kHz/dB): +/-7.3/3 Stopband width (kHz/dB): +/-30/18, +/-30/18, +/-23/26 Ripple (dB max): 1.0, 1.5, 2.0 Insert loss (dB max): 2.0, 2.0, 3.0 Terminating impedance (kohm/PF): 1.0/2.5, 1.0/2.5, 1.0/1.0 Operating temperature range (deg. C): -20-70 Case: E1