List of top Instrumentation Engineering Questions on communication systems asked in TS PGECET

Numerical Aperture (NA) of an optical fiber is given by

Compared to single-mode fibers, multimode fibers have

Which optical source is preferred for long-distance, high-speed fiber communication?

A carrier of frequency \(1\,\text{MHz}\) is amplitude modulated by a \(5\,\text{kHz}\) signal. The bandwidth of the AM signal is

For an FM signal with peak frequency deviation of \(50\,\text{kHz}\) and modulating frequency of \(10\,\text{kHz}\), the modulation index is

In TDM

Compared to single-mode fibers, multimode fibers have

Which optical source is preferred for long-distance, high-speed fiber communication?

Numerical Aperture (NA) of an optical fiber is given by

A carrier of frequency \(1\,\text{MHz}\) is amplitude modulated by a \(5\,\text{kHz}\) signal. The bandwidth of the AM signal is

For an FM signal with peak frequency deviation of \(50\,\text{kHz}\) and modulating frequency of \(10\,\text{kHz}\), the modulation index is

In TDM

Match the modulation (List-1) with the type of demodulator (List-2):

A phase locked loop can be employed for demodulation of

In an FM Broadcast, the maximum frequency deviation allowed is 75 kHz and the maximum modulation frequency is 15 kHz. The bandwidth is closest to