1. The noise floor of a receiver is A. inversely related to the ambient temperat

Question

1. The noise floor of a receiver is
A. inversely related to the ambient temperature and bandwidth.
B. directly related to the bandwidth and the noise figure.
C. directly related to noise figure and inversely related to ambient temperature.
D. directly related to the ambient temperature and inversely related to bandwidth.

2. The tuning-step size of a frequency synthesizer is primarily determined by the
A. VCO frequency.
B. reference frequency.
C. type of counter used in the divide-by-N.
D. type of phase comparator.

3. When the gain of a receiver is increased, the
A. third-order intercept point will be reduced.
B. sensitivity will be reduced.
C. noise floor will be reduced.
D. noise figure will increase.

4.A DDS receiver has a 24-bit phase accumulator and a 102.4 MHz clock frequency.
What is the frequency resolution?
A. 6.1 MHz C. 6.1 Hz
B. 4.25 Hz D. 12 Hz

Explanation / Answer

1) C. directly related to noise figure and inversely related to ambient temperature.

2) B. reference frequency.

3) D. noise figure will increase.

4) Frequency resolution = 102.4 * 10^(6) / 2^(24) = C. 6.1 Hz

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