Answer / jeyalakshmi

Voltage standing wave ratio
ALOHA is a old ethernet or networking protocol
sampling theorem:fs> 2fmax
G=4piD/lambda square
modulation tech:AM,FM,PM,QPSK,QAM,OFDM..
superheterodyne Reciever:its freq converter...or a frequency
synthesizer ckt for conversion of frequencies

Answer / gayathri

voltage standing wave ratio=(1-load impedance/1+load impedance).these are observed when ever we terminate the load with some impedance.
ALOHA is the older network protocal..
SHANONS CAPACITY THEOREM---- c>=r
i.e.,,,, cimplies channel capacity,r implies rate of transmission. these constraints have to be maintained... c=b log(1+s/n) it gives channel capacity....
sampling theorem:- sampling frequency should be greaterthan or equal to the message signal frequency.
ANTENA GAIN :- 4pid/lambda^2 i.e., d implies directivity, lambda for wavelength asociated to it....
types of antennas:---- horn antenna,array antena,uni directional, omnidirectional, bi directional antennas....
gsm stands for global synchronisation for mobile communication.here we cant have acces to change our network where as cdma stands for code division multiple access....
modulation techniques:- am,pm,fm, are analog modulation techniques,pcm,dpcm,dm,adm are digital modulation techniques.....
super hetrodyne receivers:--- these are the high frequency receivers having band width of 200 kHZ And intermediate frequency range of 10.7MHZ.

Explain why does all cellular networks have same shape of sim?

0 Answers  

---

connecting 2 transistor seriesly.In 1st trans base applying 5v then how the current will go.

1 Answers  

---

I've an interview for post of Lecturer in a ece Department. Can anyone send me some possible questions that can be helpful for me???????

0 Answers  

---

enlist, How many devices or components are use in circuits,PCB like power supply, UPS card, bus module card ,CP card?

1 Answers  

---

HAVE ANY ONE LIST OF THE FORMULAS WHICH ARE USED TO SOLVE SOLUTION OF THE DEVICES (DIODE,TRANSISTOR,CAPACITOR,FET,MOSFET)?

0 Answers  

---

---

what is protocol.what is tcp/ip,http/ftp protocol

3 Answers  

---

Pull the best out of people Put other people above yourself Challenge ideas from another viewpoint Passionate about people Dedication to serving others Pushing people past their limits Never give up Generous of sharing Make other people feel important Thinking outside the box Alternative thinking Complete honesty Wealth of information Easily accessible Work long hours Finding the right answers Working with all ages Dealing with tough situations Making the rounds with other people Compassionate for what people need Diverse in decision Step outside self

0 Answers  

---

i am preparing for AAI JR EXECUTIVE exams so plz suggest the objective materail for preparation

0 Answers   AAI Airports Authority Of India,

---

What is a cathode ray oscilloscope (cro)?

0 Answers  

---

What is the state if the RED LED is glowing on PWSx card What is the state if the YELLOW LED is glowing on PWSx card

0 Answers   NSN,

---

what is oscillation?

11 Answers  

---

What is the difference between power diode and signal diode?

0 Answers  

---