In a pulse-position modulation system, what...

In a pulse-position modulation system, what...

Question 1 of 27070PtLJiF1ifvK3a61R3oXL

In a pulse-position modulation system, what parameter does the modulating signal vary?

Question 1 of 27070

Q

In a pulse-position modulation system, what parameter does the modulating signal vary?

🔍 Key Concepts

• Pulse-position modulation (PPM) definition in basic communications theory • How PPM differs from pulse-amplitude modulation (PAM) and pulse-width modulation (PWM) • Which pulse characteristic actually shifts in time when a signal changes

💭 Think About

• Ask yourself: in PPM, when the input (modulating) signal gets larger or smaller, what happens to the location of a pulse within a fixed time frame? • Compare each option to the simple idea: does PPM change how many pulses you send, how tall they are, how wide they are, or where in time they appear? • Think about which characteristic "position" most naturally refers to when we talk about a pulse on a time axis.

✅ Before You Answer

• Be clear on the difference between pulse timing/position and pulse duration (width) • Verify that PPM keeps pulse amplitude and often pulse width constant, focusing the variation on only one parameter • Eliminate any option that describes changing more than one pulse parameter at the same time, since ideal PPM targets a single characteristic