Answer / sanjay kumar pal

FDM IS USED FOR ANALOG SIGNALS GENERALLY FOR THE SIGNALS
TRANSMITED THROUGH TWISTED PAIR CABLE.
WHILE
WDM IS USED FOR SIGNALS TRANSMITTED THROUGH OPTICAL FIBER
CABLES.
BOTH ARE SAME BUT USED IN DIFFERENT AREAS.

Answer / aby perumpanany

FDM > Frequency Division Multiplexing
WDM > Wavelength Division Multiplexing

Answer / hakani raj

their is no difference between FDM and WDM because wavelenth is inversly proportional to frequency. but generally when we are working on optical domain then we consider WDM because

i) we have limited source to genrate light using LED or LASER. using this we can genrate light easily and then passthourgh prism to get different wavelength. we can not genrate such high frequency.

ii) to analysis of such high frequency in CRO is not possible that why we are using WDM when we r working on Optical domain


Regards,
Raj Hakani
(M.tech Communication)
Nirma University

Answer / vinit92

in fdm data transmitted based on the particular frequency
and in wdm data transmitted based on the particular wavelength .
fdm is used in twisted pair cable and wdm is used in fiber
optic cable .

Answer / sandhi

yes

What are the disadvantages of load commutated chopper?

0 Answers  

why we are using input resistance in op-amp. indicate the role of it.

1 Answers  

What are digital electronic flip flops, state the different types of flip flop and their uses?

0 Answers  

capacitive transducer : dielectric type.

2 Answers   ONGC,

Draw and explain a mod-10 counter.

0 Answers   Ciena,

What is the difference between drift current and diffusion current?

3 Answers  

I am in need of question set of ONGC Electronics & Communication

0 Answers   ONGC,

convert d flip flop to jk flip flop using mux

0 Answers   ABC,

Which material is piezoelectric?

0 Answers   C DAC, CDAC,

what is the advantage of edge triggered devices compared to gated devices?

2 Answers   JMI, TCL,

I have 3 phase 25kva transformer how can i connect this transformer to two phase line?

2 Answers  

Suppose if there is the level of impurity in p-type & n-type semiconductor of pn junction diode is different then what effect on depletion?

0 Answers