Calculate the frequency for maximum drift of crystal if The crystal has a stability of 6300 ppm and an output frequency of 268.2MHz and frequency multiplier chain with factors of 2, 3, and 3.(a) 123.5MHz(b) 423.2MHz(c) 269.65MHz(d) 235.1MHzI have been asked this question in class test.I'm obligated to ask this question of Radio Transmitters topic in section Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics

Calculate the frequency for maximum drift of crystal if The crystal ha

1.	Calculate the frequency for maximum drift of crystal if The crystal has a stability of 6300 ppm and an output frequency of 268.2MHz and frequency multiplier chain with factors of 2, 3, and 3.(a) 123.5MHz(b) 423.2MHz(c) 269.65MHz(d) 235.1MHzI have been asked this question in class test.I'm obligated to ask this question of Radio Transmitters topic in section Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics
Answer» Correct choice is (c) 269.65MHz The best explanation: VARIATION = 300ppm = 0.03% This variation is multiplied by the FREQUENCY multiplier CHAIN, yielding 0.03 PERCENT x 18 =60.54 percent. Now, 268.2 MHz x 0.0054 = 1.45 MHz. Thus, the frequency of the transmitter output is 268.2 + 1.45 MHz. The maximum frequency is 268.2 + 1.45 = 269.65 MHz.

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