CP/PC364 Data Communications & Networks Laboratory

Amplitude Modulation

PRELAB

This week's laboratory investigates Amplitude Modulation. Using the XR-2206 datasheet (provided below) determine the following and record in your lab notebook (refer to table 1 to resistor and capacitor values available in the lab):

  1. Find and sketch the circuit for minimum harmonic distortion
    • what supply voltage(s) will you use?
    • determine which timing resistor and capacitor to use to give a 10 Hz frequency
    • for amplitude modulation a dc bias must be applied to the circuit, determine where it is connected
  2. Write out all the parts you will need (chips, resistors, capacitors, # of alligator clips, # of scope probes)

Datasheet: XR2206 [Copyright 1972 EXAR Corporation. Datasheet June 1997]

Table 1: Available Parts
Resistors (Ω) Capacitors (μF)
10 1k 0.001 0.01
3.9k 4.7k 0.033 0.047
5.1k 10k 0.1 0.22
20k 51k 0.33 0.47
100k 1M 1 10