The expected answers were:
- (i) r.f. tuner – selects desired station;
ii. video amplifier – amplifies video signal;
- video detector – detects (or modulates) the amplitude modulated picture carrier;
- sync. separator – separates the synch pulse from the composite video signal.
- Types of modulation
- Video – amplitude modulation (a.m.)
- Sound – frequency modulation (f.m.)
The question was on Communication System. It was unpopular with the candidates. The performance of the candidates was average.