Q1/ A narrowband FM signal has a carrier frequency of 90 kHz and a deviation ratio of 0.05. The modulation bandwidth (message signal bandwidth) is 15 kHz. This signal is used to generate a wideband FM signal with a deviation ratio of 22 and a carrier frequency of 120 MHz. Give the required value of frequency multiplication, n. II. I. Give two frequencies for the mixer to give the desired carrier. Define the required bandpass filter (centre frequency and bandwidth). I.

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Q1/ A narrowband FM signal has a carrier frequency of 90 kHz and a deviation ratio
of 0.05. The modulation bandwidth (message signal bandwidth) is 15 kHz. This signal
is used to generate a wideband FM signal with a deviation ratio of 22 and a carrier
frequency of 120 MHz.
Give the required value of frequency multiplication, n.
Give two frequencies for the mixer to give the desired carrier.
Define the required bandpass filter (centre frequency and bandwidth).
I.
I.
III.
Transcribed Image Text:Q1/ A narrowband FM signal has a carrier frequency of 90 kHz and a deviation ratio of 0.05. The modulation bandwidth (message signal bandwidth) is 15 kHz. This signal is used to generate a wideband FM signal with a deviation ratio of 22 and a carrier frequency of 120 MHz. Give the required value of frequency multiplication, n. Give two frequencies for the mixer to give the desired carrier. Define the required bandpass filter (centre frequency and bandwidth). I. I. III.
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