HFC, Wireless, and Mobile Phone Technologies
Hybrid Fiber Optic-Coaxial (HFC)
Hybrid Fiber Optic-Coaxial (HFC) networks combine fiber optics and coaxial cable. This type of network represents the natural evolution of traditional cable television (CATV) networks.
The Headend
The headend is the central body from which the entire system originates. It usually has a set of antennas that receive TV and radio channels from different distribution systems (satellite, microwave, etc.), as well as links to other headends or television studios and other
Read MoreC Programs: Area, Circumference, Interest, Swapping
Calculate Area and Circumference of a Circle
#include <stdio.h>
void main() {
float radius, area, cf;
printf("Enter Radius of Circle\n");
scanf("%f", &radius);
// Value of pi is 3.14
area = 3.14 * radius * radius;
printf("The area of Circle is %f", area);
cf = 2 * 3.14 * radius;
printf("\nThe Circumference of Circle is %f", cf);
}
Calculate Area of Triangle and Square
Calculate Area of a Triangle
#include <stdio.h>
int main() {
float base, height, area;
printf(Understanding Communication Systems: Definitions, History, and Models
Understanding Communication Systems
- Definition of a System
A combination of interacting elements organized to achieve one or more stated purposes.
- What is System Engineering?
Systems engineering is an iterative process of top-down synthesis, development, and operation of a real-world system that satisfies, in a near-optimal manner, the full range of requirements for the system.
- Chronology of Communication Systems
The Visual Era: Smoke signals → Pigeon Post → Printing Press (1450)
The Wired Era:
Read MoreSatellite TV and Community Facilities: Signals and Equipment
Community Facilities
Processors are devices that change the original frequency of emissions. They are used to mix signals from different satellites positioned at certain satellite transponders, filling empty voids present in the emissions of another satellite. This is achieved with a single line of descent.
Equipment for Distribution in F1
F1 Amplifiers: A broadband amplifier that covers the entire F1 band of 950MHz to 2150MHz satellite. It is necessary when you want to give users a transparent band
Read MoreMastering Active Listening: Key Elements & Skills
Active Listening
Introduction
While listening is an integral part of effective communication, few students are taught how to listen effectively. Many students believe that hearing what is said is the same as listening to what is said. In reality, they are distinctly different.
Hearing is a physical yet passive act involving the process and function of perceiving sound. Listening is hearing the sounds with deliberate intention. Therefore, unlike hearing, listening is a skill that improves through conscious
Read MoreTransmission Media: Types, Interference, and Channel Capacity
In a data transmission system, the transmission medium is the physical path through which the sender and receiver communicate. We distinguish two types of media: guided and unguided. In both cases, transmission takes place through electromagnetic waves. Guided media direct the waves along a physical path; examples of these media are coaxial cable, fiber optic, and twisted pair. Unguided media transmit waves but do not direct them; examples include air and vacuum.
The nature of the medium, along with
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