ALL ABOUT CARRIER WAVES--(How They work) Explained.

[d2hmks View Profile Find User's Posts Find User's Threads PM User E-Mail User]

CARRIER WAVES:-

Actually IF signal is a combination off all these carrier ,Frequencies,
Audio, vedio , Burst, and sync signal, and we call it composite
signal that Reaches on the input of IF Tuner,
Where the composite signal is beeing rectified and send to
various stages.
THE ROLE OF CARRIER WAVES:-
As you know the signal or frequencies are very weak,To carry
them from Transmitter to users end,Their comes the role of carrier
waves. They are powerful enough to carry them from one end to
other,They play a mazor role to get the signal to us.
After the signal enter through IF input of the Tuner,These
carrier waves are beeing grounded,If the carrier were
frequencies than they could not have been grounded
Because their role has been ended then we grounded
them and you know very well some thing grounded
then nothing left, Means no signal and no frequencies.
Now this is the theory behind the carrier waves.

Now we have filtered the composite signal and we get
Audio for Audio stage ,Vedio for vedio stage and Burst
signal for Croma stage.These are the FREQUENCIES
I think it would be better to understand now,This is my personal
Experience as it was my field from a long time and I left
this field from 5 to 6 year back.

One thing more may it be (frequncies, Waves, Modulations)
These all are in the shape of Electric current or Electric pulse.

I STILL CALLED THE ELECTRONICS IS THE MOTHER OF ALL SCIENCES. Guests cannot see images in the messages. Please register to forum by clicking here to see images.Guests cannot see images in the messages. Please register to forum by clicking here to see images.Guests cannot see images in the messages. Please register to forum by clicking here to see images.

I always write what I know ,So not copied from any sourse,Its aself Genrated post.Thanks

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____________________________________
That is why I mostly said:-

EVERY THING IS NOT FOR EVERY ONE !!

[d2hmks View Profile Find User's Posts Find User's Threads PM User E-Mail User]

The frequency for a given radio or television station is actually the carrier wave's
center.Contents Guests cannot see images in the messages. Please register to forum by clicking here to see images.Guests cannot see images in the messages. Please register to forum by clicking here to see images.

In telecommunications, a carrier wave, or carrier is a waveform (usually sinusoidal)
that is modulated (modified) with an input signal for the purpose of conveying information.
This carrier wave is usually of much higher signal than the input signal. The purpose of
the carrier is usually either to transmit the information through space as an electromagnetic
wave (as in radio communication), or to allow several carriers to share a common physical
transmission medium by frequency division multiplexing (as is used in, for example,
a cable television system
In telecommunication, the term carrier (cxr) or carrier wave has the following meanings.
A waveform suitable for modulation by an information-bearing signal.
An unmodulated emission. Note: The carrier is usually a sinusoidal wave or a uniform
or predictable series of pulses. Synonym: carrier wave. Guests cannot see images in the messages. Please register to forum by clicking here to see images. Guests cannot see images in the messages. Please register to forum by clicking here to see images.
Sometimes employed as a synonym for a carrier system, or a synonym for a
telecommunications provider company (operator), such as a common carrier.

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_________________________________

EVERY THING IS NOT FOR EVERY ONE !!

[RITESH KAKKAR View Profile Find User's Posts Find User's Threads PM User E-Mail User]

we do modulation in high freq. b'coz in low freq. we need large ant. and there noise in low freq. called interference......

[d2hmks View Profile Find User's Posts Find User's Threads PM User E-Mail User]

Welcome Ritesh,
You are right dear Ritesh,But the composite signal is Modulated frequency means RF out
and when we depart Audio & Video from composite signal,Then it is called as DEMODULATED
signal or frequency in the shape of:-

1.MODULATED = RF-OUT/IN
2.DE MODULATED = Audio & Video out

[RITESH KAKKAR View Profile Find User's Posts Find User's Threads PM User E-Mail User]

These are the basic, main part is how to design it..........

[d2hmks View Profile Find User's Posts Find User's Threads PM User E-Mail User]

@Ritesh
These are the basic, main part is how to design it....

You are welcome to put light on this if you know some thing ?
As you are also Related to Electronic field,So I welcome your
valuable info. on Electronics & specially on carriers waves,
Modulation etc.
Also check your email ID.

[RITESH KAKKAR View Profile Find User's Posts Find User's Threads PM User E-Mail User]

In analog modulation is of continuous signal e.g.: PAM (pulse amplitude modulation), PWM (p. Width Mod.), PPM ( pulse Position mod.)....

But in Digital modulation is of 0,1's as know most of all satellite, telephone, etc working in digital because of there advantages digital modulation is is used.....
e.g.: FSK ( freq. shifting keying) in this which when 0 comes freq. of carrier decreases...... , ASK (amplitude shifting keying) , PSK ( phase shifting keying)


by modifying this key, all others key are formed like 8Qsk,etc...


Keying mean on/off

Send the mail again..!!

[sureshkumar1897 View Profile Find User's Posts Find User's Threads PM User E-Mail User]

nice discussion please read digital communication book you will get answer

[d2hmks View Profile Find User's Posts Find User's Threads PM User E-Mail User]

(06-08-2011 11:59 PM)sureshkumar1897 Wrote: Guests cannot see links in the messages. Please register to forum by clicking here to see links.nice discussion please read digital communication book you will get answer

________________

Welcome sureshkumar,Guests cannot see images in the messages. Please register to forum by clicking here to see images.
Friend this discussion is for forum members to know
some what basic about carrier waves & Modulation,
So you can also take part in it and give some part
of your knowledge & share with your friends.Thanks Guests cannot see images in the messages. Please register to forum by clicking here to see images.

[d2hmks View Profile Find User's Posts Find User's Threads PM User E-Mail User]

(06-08-2011 09:38 AM)RITESH KAKKAR Wrote: Guests cannot see links in the messages. Please register to forum by clicking here to see links.In analog modulation is of continuous signal e.g.: PAM (pulse amplitude modulation), PWM (p. Width Mod.), PPM ( pulse Position mod.)....

But in Digital modulation is of 0,1's as know most of all satellite, telephone, etc working in digital because of there advantages digital modulation is is used.....
e.g.: FSK ( freq. shifting keying) in this which when 0 comes freq. of carrier decreases...... , ASK (amplitude shifting keying) , PSK ( phase shifting keying)


by modifying this key, all others key are formed like 8Qsk,etc...


Keying mean on/off

Send the mail again..!!

_____________________________

Thanks dear Riteshkakkar,Guests cannot see images in the messages. Please register to forum by clicking here to see images.
Good job and well explanation,I also hope that
you will be giving your part of valuable knowledge
to this discussion.Thanks.Guests cannot see images in the messages. Please register to forum by clicking here to see images.Guests cannot see images in the messages. Please register to forum by clicking here to see images.