ECE :: Communication Systems
-
In case of stabilized reactance modulator AFC system
-
Assertion (A): Demodulation of SSB and AM signals is exactly similar
Reason (R): The basic SSB demodulation device is product detector.
-
In shot noise
-
In VCR, the chrominance signal's frequency is
-
Assertion (A): A video monitor does not need RF tuner and IF amplifier
Reason (R): The picture tube in TV is basically a CRT.
-
Consider the following statements as regards IF in radio receivers
- If IF is too high, poor selectivity and poor adjacent channel rejection could result
- If IF is high, tracking difficulties increase
- A very low IF makes selectivity too sharp
- As IF is decreased, image frequency rejection becomes better
-
Audio-signal modulates a 125 MHz carrier, causing a frequency deviation of 5 kHz. The bandwidth of the narrowband FM signal is __________ kHz.
-
Assertion (A): Radar gave birth to microwave technology.
Reason (R): In radar systems very high frequencies give the most accurate results.
-
A channel has a SNR of 7 and BW 4 kHz. Keeping the channel capacity (BPS) same, the BW is reduced to accommodate more channels. The SNR
-
The output VR of the ratio detector is related with the output VF of similar Foster-Seeley discriminator as follows.
Whatsapp
Facebook
