1
GATE ECE 2021
Numerical
+1
-0
Consider a super heterodyne receiver tuned to 600 kHz . If the local oscillator feeds a 1000 kHz signal to the mixer. The image frequency (in integer) is $\_\_\_\_$ kHz .
Your input ____
2
GATE ECE 2021
Numerical
+1
-0
Consider a carrier signal which is amplitude modulated by a single - tone sinusoidal message signal with a modulation index of $50 \%$. If the carrier and one of the side bands are suppressed in the modulated signal, the percentage of power saved (rounded off to one decimal place) is $\_\_\_\_$
Your input ____
3
GATE ECE 2016 Set 1
Numerical
+1
-0
A super heterodyne receiver operates in the frequency range of 58 MHz – 68 MHz. The
intermediate frequency f1F and local oscillator frequency fL0 are chosen such that
f1F $$\leq$$ fL0.It is
required that the image frequencies fall outside the 58 MHz – 68 MHz band. The minimum
required
f1F (in MHz) is ___________.
Your input ____
4
GATE ECE 2016 Set 3
Numerical
+1
-0
For a superheterodyne receiver, the intermediate frequency is 15 MHz and the local oscillator frequency
is 3.5 GHz. If the frequency of the received signal is greater than the local oscillator frequency, then
the image frequency (in MHz) is _________.
Your input ____
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