Analog signals: 250 Hz; 500 Hz;1 KHz sinusoidal signals All amplitude variable from 0 to 5V > Digital signals: 64 KHz, 32 KHz, 16 KHz & 8 KHz signals DC: Adjustable over 0 to 5 Volts Simplex Fiber Optic cable Attenuation at 660 nm: Typically 0.3 dB per meterTransmitter: Fiber optic LED Wavelength: 660 nmOptical power: 30 to 40 microwatts at lf=10maReceiver: FO- Phototransistor