Features: Provides Sine waveform output of 250Hz, 500Hz, 1 KHz, and 2 KHz with Amplitude adjustments of 0 - 5Vp-p Switch selectable sampling clock of 4, 8, 16, 32 KHz. On-board features Analog Sample Circuit/Output, Sample & Hold Circuit/Output, Flat Top Circuit/Output 4th order Butterworth Low pass filter with cut off frequency of 3.4 KHz. PAM, PWM,PPM modulation & demodulation