A longer pulse length will excite a:
A: ) narrower range of frequencies.
B: ) broader range of frequencies.
C: ) range of frequencies equal to the pulse time.
A: ) narrower range of frequencies.
B: ) broader range of frequencies.
C: ) range of frequencies equal to the pulse time.
举一反三
- Channel A: a word that indicates a response is not required B: a range of frequencies used by a particular station to transmit radio messages
- The sum of the relative frequencies for all classes will always equal:
- The sum of frequencies for all classes will always equal 1. (<br/>)
- What’s meaning of channel A: a word that indicates a response is not required B: a word that indicates a response is required C: a system in which words represent individual letters D: a range of frequencies used by a particular station to transmit radio messages
- 4. To fix the frequency boundaries of relatively high gain, 0.7 Amid was chosen to be at the cutoff levels. The corresponding frequencies, f1 and f2, are generally called ________. A) corner frequencies B) cutoff frequencies C) half-power frequencies D) All of the above A: wrong. B: wrong. C: wrong. D: This is the right answer.