ISRO Scientist or Engineer Electronics 2015
For the following questions answer them individually
ISRO Scientist or Engineer Electronics 2015 - Question 11
In a binary source, Os occur three times:as often as 1s. What is the information contained in the 1s?
ISRO Scientist or Engineer Electronics 2015 - Question 12
Spectrum of a signal x(t), sampled at period T, is given by:
ISRO Scientist or Engineer Electronics 2015 - Question 13
A bandpass signal occupies the bandwidth 390 KHz to 410 KHz. What minimum sampling frequency would you use from the options giveri below, so as to avoid aliasing?
ISRO Scientist or Engineer Electronics 2015 - Question 14
A 12-bit ADC has input signal range of $$\pm 1 V$$. The signal to quantization noise ratio if a sine wave signal with 0.25 V peak voltage is given as input is:
ISRO Scientist or Engineer Electronics 2015 - Question 15
Identify the modulation schemes for the shown signal constellation diagram
ISRO Scientist or Engineer Electronics 2015 - Question 16
Which of the following modulation scheme requires minimum powerfor transmission?
ISRO Scientist or Engineer Electronics 2015 - Question 17
Which of the following channel coding scheme helpsin correcting burst errors?
ISRO Scientist or Engineer Electronics 2015 - Question 18
A 70 MHz carrier is QPSK modulated by a 1.544 Mbps T1 data stream. The transmitter employs a raised-cosine filter with $$\alpha = 0.2$$ What is the transmitted bandwidth of the
signal?
ISRO Scientist or Engineer Electronics 2015 - Question 19
If two tones $$f_1$$, and $$f_2$$, are amplified by a non-linear amplifier, which frequency components would be present in output?
ISRO Scientist or Engineer Electronics 2015 - Question 20
A phaselock loop with a first order loop filter can track:
