Interview Questions on Communications - Please Contribute..

communication and signal interview questions

Hi friends

Let us start posting some basic interview questions onCommunciations/Wireless Technologies /Mobile ........ /Antennas /Microwave ..../Electromagnetics....

Please every contribute and share your experience in interviews by posting few basics of communications like

What s the need for modulation ?

Why AM range is more than FM ?


Like these simple questions along with answers .Its very helpful to all .

Improve our basics by this way......

Thanking you friends,

Regards,
Goud

Added after 11 minutes:



1) What s the AM radio frequency range ? AM signal bandwidth ?
Ans:

AM radio ranges from 535 to 1705kHz ===> 1170 kHz

AM signal bandWidth is 10 KHz ==> ideally speaking total 1170/10 ==> 117 different channels available for AM radio stations .

2 ) United States can have nearly 5,000 AM radio stations on only 117 different frequencies How ?
Ans :

Signals of stations tend to be limited in their range, you can use some of the frequencies many times — as long as the stations are far enough apart geographically.

3) How far an AM station's signal travels depend s on which factors ?

Ans:

1)Station's frequency (channel),
2)The power of the transmitter in watts,
3)The nature of the transmitting antenna,
4)How conductive the soil is around the antenna (damp soil is good; sand and rocks aren't),
5)Ionospheric refraction. (The ionosphere is a layer of heavily charged ion molecules above the earth's atmosphere.)



Regards,
Goud

telecommunications interview questions

can you plz give me idea that what sort of questions may be asked for core network interview?

thank you

dipu

radio frequency technician interview questions

1)What are the different types of internetworking/networking devices ?
Ans:
Repeaters,Bridges,Routers,Gateways

2)What is MAC address?
Ans:
The address for a device is identified at the Media Access Control layer in the networking architecture.MAC address is usually stored in ROM on the network adapter card is unique.

3)What is redirector?
Ans:
Redirector is software that intercepts file or prints I/O requests and translates them into network requests.This comes under presentation layer.


Regards,
Tarakapraveen Uppalapati Goud

difference between SNR and Eb/No