Chapter 4
Q. 4.8
Determine the noise margins for an RS-232 interface with driver signal voltages of ±6 V.
Step-by-Step
Verified Solution
The noise margin is the difference between the driver signal voltage and the terminator receive voltage, or
NM = 6 – 3 = 3 V or NM = 25 – 6 = 19 V
The minimum noise margin is 3 V.