S. Mandayam/ ECOMMS/ECE Dept./Rowan University Electrical Communications Systems ECE Spring 2007 Shreekanth Mandayam ECE Department Rowan University Lab 4: Pre-lab Instruction

S. Mandayam/ ECOMMS/ECE Dept./Rowan UniversityPlan Digital Communications Transceiver PCM  -Law Quantization T1-Line TDM Protocol Lab Project 4

S. Mandayam/ ECOMMS/ECE Dept./Rowan University ECOMMS: Topics

S. Mandayam/ ECOMMS/ECE Dept./Rowan University Digital Communications Transceiver Anti- aliasing Filter SamplingQuantization Data Encryption Encoder Source Encoder Error Control Encoder Channel/ Line Encoder Modulator MUX Audio Amp Source Decoder Data Encryption Decoder Error Control Decoder Equalization / Decision Circuits Demod- ulator DEMUX Reconstruction/ DAC ADC CODEC MODEM Analog o/p Multiple access channel Analog i/p

S. Mandayam/ ECOMMS/ECE Dept./Rowan University T1-Line TDM Format F Channel Channel Channel Frame = (24 Channels + F) = 125  s 193 bits Frame Sync Bit Even Frames: Odd Frames: Every Sixth Frame LSB (8th bit) is a Signaling bit Bipolar R-Z Line Encoding

S. Mandayam/ ECOMMS/ECE Dept./Rowan University Lab Project 4: Digital Baseband Communications

S. Mandayam/ ECOMMS/ECE Dept./Rowan University Test Circuit