1. S. Mandayam/ ECOMMS/ECE Dept./Rowan University Electrical Communications Systems ECE.09.331 Spring 2007 Shreekanth Mandayam ECE Department Rowan University http://engineering.rowan.edu/~shreek/spring07/ecomms/ Lab 4: Pre-lab Instruction

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

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

4. 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

5. S. Mandayam/ ECOMMS/ECE Dept./Rowan University T1-Line TDM Format F Channel 1 18765432 Channel 2 18765432 Channel 24 18765432 1 Frame = (24 Channels + F) = 125  s 193 bits Frame Sync Bit Even Frames:0 0 1 1 1 0 Odd Frames:1 0 1 0 1 0 Every Sixth Frame LSB (8th bit) is a Signaling bit Bipolar R-Z Line Encoding

6. S. Mandayam/ ECOMMS/ECE Dept./Rowan University Lab Project 4: Digital Baseband Communications http://engineering.rowan.edu/~shreek/spring07/ecomms/lab4.html

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