ISRO Scientist or Engineer Electronics 2013
For the following questions answer them individually
A pulse signal having 100 kHz frequency and 70 nsec rise time is to be measured on an oscilloscope. The minimum required bandwidth of the oscilloscope is,
A lossless antenna has directional gain $$ G(\theta,\psi)$$, then $$\int_{\psi = -\frac{\pi}{2}}^{\psi = \frac{\pi}{2}}$$ $$\int_{\theta = -\frac{\pi}{2}}^{\theta = \frac{\pi}{2}} G(\theta, \psi)d \theta d \psi$$ is:
If f(t) is 1 MHz sinusoid with 1 Vp - p and sampling frequency fs is 25 KHz, the output will be:
A 10dB attenuator is put at the input of a low noise amplifier having 3dB noise figure. Now the noise figure of the cascaded amplifier will be.
A 33.33% duty cycle rectangular wave is fed to the input of an Spectrum Analyzer. What will be observed?
Phase function of a filter is $$(f) = kf^2,k > 0$$. The group delay of the filter has the shape
1Vp-p sinusoid is digitized by a 4 bit A-to-D converter with input dynamic range of 2 Vp-p. The signal to noise ratio of the digitized signal is:
