DCL-001-Analog Signal Sampling & Reconstruction DCL-002-4 Channel TDM Pulse Amplitude Mod & Demod DCL-003-2 Channel PCM Transmitter DCL-004-PCM Receiver to be used with DCL-003 DCL-005-Data Conditioning & Carrier Mod Transmitter DCL-006-Data Reconditioning & Demod to be used along with DCL-005 DCL-007-PAM-PWM-PPM Pulse Mod & Demod DCL-008-Delta Modulation & De-Modulation, Liner, CVSD DCL-009-Data Modem Trainer : (2 units); Z-80 based : Data transmission with RS232 Link to PC & FSK DCL-010-Optical Fiber Trainer System