sheng_james said:
hi guys i just a few question about designing a fm transmitter. what are the things that i should consider in designing it.
-what frequency will it operate on?
- what output power will it deliver?
- what kind of antenna will be used with it?
- what kind of receiver will be used to receive it?
- what power supply will be used?
Based on the answers to those questions, others will then come up like:
- what bandwidth will my signal occupy, and therefore what frequency deviation will my modulator deliver?
- what type of modulator will be required...analog, digital, stereo, subcarrier?
- if digital, what protocol or standard will be supported?
- what frequency stability will be necessary?
- what modulation signal to noise ratio will be met?
- what spurious emissions are acceptable?
there are many other questions, but these are the basics. FM transmitters are commonly used in broadcasting and two-way communications radios, so it would be helpful if you specified which type you are thinking of as the two types are very different.