发布频次（Frequency）
发布频次（Frequency）
相关考题：
The maximum data rate of any single wireless link can be described by the shannons theorem which is related to the（）in hertz，and the（）on the channelA．signal frequency B．bandwidth C．carrier frequency D．noise frequency A．signal B．caeeier C．noise D．data signal
You are attempting to parallel two AC.generators, and the synchroscope pointer revolving in the fast direction.This indicates that the frequency of the incoming machine is A.higher than the bus equencyB.lower than the bus equencyC.the same as the bus frequency but out of phase with itD.same as the bus frequency and the circuit breaker may be closed at
OFDM的英文是()A.OverloadFrequencyDivisionMultiplexingB.Orthogonal?Frequency?Division?MultiplexingC.Overwhelming?Frequency?DivisionMultiplexingD.Outstanding?Frequency?Division?Multiplexing
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of ______．A.High frequency pulsesB.Combinations of high and low frequency pulsesC.The same frequency for all stations in a chainD.Varied long and short pulses
Pitch is produced by frequency of vibration of the vocal cords. The higher the frequency, the higher the pitch.（）A对B错
Pitch is produced by frequency of vibration of the vocal cords. The higher the frequency, the higher the pitch.（）
FDM的英文是（）A、Overload Frequency Division Multiplexing B、Orthogonal Frequency Division Multiplexing C、Overwhelming Frequency Division Multiplexing D、Outstanding Frequency Division Multiplexing
OFDM的英文全称是（）A、Orthogonal Frequency Division MultiplexingB、Outstanding Frequency Division MultiplexingC、Overwhelming Frequency Division MultiplexingD、Orthogonal Frequency Division Modulation
单选题The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.AHigh frequency pulsesBCombinations of high and low frequency pulsesCThe same frequency for all stations in a chainDVaried long and short pulses
单选题When it is accepted to remain on the frequency indicated，you should say（）.AStanding by on VHF frequencyBComing to VHF frequencyCVHF frequency. is the best place for you to stay byDremaining in frequency. and do not change
单选题When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCAfter the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDRoutine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
判断题Pitch is produced by frequency of vibration of the vocal cords. The higher the frequency, the higher the pitch.（）A对B错