Networking & wireless forum: Why to Allocate the bandwidth

That was helpful thanks a lot. But still I have a few more doubts.
Just to be clear....
1)
Suppose I have at my home a transmitter and a receiver with me. Now i am transmitting a signal at a frequency of say 'X' hz with the data being modulated from the transmitter in FM manner. And say that there is a radio station with same frequency (X FM). Now, will I be able to transmit the data or not. Technically I shouldn't because that particular frequency is allocated to that channel right.

2)
Secondly, if there is a radio station at say X FM. Will I be able to access that same radio channel, by turning the knob of my radio to that particular frequency, from anywhere in the world. Because it has been allocated that channel, so technically I must be able to access it anywhere because the organization wouldn't have allocated it to anyone else except that channel company.

Thanks again for the above answer, it was helpful.

1] No, not if that channel has been allocated to that radio station.

2] Yes, but probably not everywhere around the world. FM is, I believe, short range. The physical range depends on the amount of power the station can use and other factors like height of the transmitter. If they could use unlimited power, they would still need to be mindful of bleeding into frequencies of nearby, (FM range) stations.

But of course this all depends on where you live. I have no idea if all nations allocate and control microwave and wireless frequencies. For all I know, some nations may have a 'free for all'.

Your other question below. Yes it may be available in other countries. Different countries allocate frequencies for their own purpose. There may be an international agreement about certain frequencies but apart form that nations have their own free will.

Mark

1. Yes, technically you can. But it's not allowed and there's a good change you'll see the police in a short time. How short a time depends on what others use that same frequency. If it happens to be the Army for its very secret and very secure communications it won't take long. Same for air traffic control after a few planes crashed because they couldn't receive the instructions. If it's the very popular local radio that other people can't receive now, it won't take very long either if enough of your fellow citizens complain.
Compare it with driving on the right side of the road in the UK. Technically you can. But it's not adviced to do it for some good reason.

2. If you're inside the receiving range (distance): yes. Otherwise: no. Only so called 'short wave' is really nearly world-wide.


Kees

and just one more thing...

What about different countries. If a channel is allocated a specific frequency, will that frequency be not available for any other country as well.
This was just an extension of my previous post but if the question wasn't clear this is it.

Also I tried to catch a radio channel which is there in some other state, but I couldn't from where I stay.