HamSandwich

Yes, you still need a callsign.

Study › General › G8B › G8B06

G8B06

SIGNALS AND EMISSIONS · - Frequency changing; bandwidths of various modes; deviation; intermodulation

G8B06G8B →

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

  1. A3 kHz
  2. B5 kHz
  3. C8 kHz
  4. D16 kHz
Why FM bandwidth is estimated with Carson's rule: bandwidth = 2 x (peak deviation + highest modulating frequency). Here that is 2 x (5 kHz + 3 kHz) = 16 kHz. The factor of 2 appears because the sidebands spread out on both sides of the carrier.
Watch out The choice that says 8 kHz is just the sum of deviation and modulating frequency, forgetting to double it for both sidebands.
Carson: add deviation + audio, then double. 5 + 3 = 8, times 2 = 16 kHz.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
← G8B05 All of G8B G8B07 →

The rest of G8B

  1. G8B01 Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency…
  2. G8B02 What is the term for interference from a signal at twice the IF frequency from the desired signal?
  3. G8B03 What is another term for the mixing of two RF signals?
  4. G8B04 What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the …
  5. G8B05 Which intermodulation products are closest to the original signal frequencies?
  6. G8B06 What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?
  7. G8B07 What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 M…
  8. G8B08 Why is it important to know the duty cycle of the mode you are using when transmitting?
  9. G8B09 Why is it good to match receiver bandwidth to the bandwidth of the operating mode?
  10. G8B10 What is the relationship between transmitted symbol rate and bandwidth?
  11. G8B11 What combination of a mixer's Local Oscillator (LO) and RF input frequencies is found in the output?
  12. G8B12 What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?
  13. G8B13 Which of the following is an odd-order intermodulation product of frequencies F1 and F2?
Icom IC-7300 HF/50MHz Base TransceiverSponsored · View on Amazon →BaoFeng BF-F8HP 8W Dual Band HandheldSponsored · View on Amazon →