Principles of communication Questions

A telephonic communication service is working at carrier frequency of 10 GHz. Only 10% of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channe...

The manifestation of band structure in solids is due to

The circuit shown below acts as :

What should be the maximum acceptance angle at the air-core inter face of an optical fibre if n1 and n2 are the respeectively?

12 signals each band limited to 5kh are to be transmitted by frequency -division multiplexer. If AM-SSB modulation guard band od 1kHz is used then the bandwidth of multiplexed single is...

Wireless communication across english channel is achived by -

Which is used as light source in optical fibre communication :-