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What is the wavering tone warning signal alerts the base
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What does the waivering tone warning signal alerts the base of?
air attacks
Why is modulation necessary in signaling?
If you didn't have modulation it'd be the same signal going out the whole time, like a continuous tone - which can't really tell you that much. By modulating the signal you can say much more.
What is the carrier signal?
It is the pure sine wave signal with no modulation (data, information). It doesn't vary in amplitude or frequency. Not really a signal yet, which implies information. Call it a wave. From there, we have: CW- Morse code by turning the carrier on and off ICW- the I means interupted, close to the same as CW MCW- still coded but by Modulating the carrier with a tone. AM- the amplitude is modulated (by voice or tone) Basic voice- but creates sidebands FM- The frequency is modulated... SSB-Single sideband. Like AM but without the carrier and one sideband. Low bandwidth, low power. FSK- Frequency shift Keying, where the frequency of the modulation source is shifted hi to lo in ASCII, for teletype communication via radio links.. At this point a bit more complex....
How does the warble alarm siren works?
Basically, all that happens is an integrated circuit produces an output signal of 1010101010101010 over and over again. A second one processes it into a tone such as 1=1.8khz 0=2.6khz. This series of tones is then fed into a piezoelectric sounder.
Why two frequencies are used in dtmf?
The tone frequencies, are selected such that harmonics and intermodulation products will not cause an unreliable signal. No frequency is a multiple of another, the difference between any two frequencies does not equal any of the frequencies, and the sum of any two frequencies does not equal any of the frequencies.
What is the wavering tone signal?
What is the wavering tone warning signal alerts the base
Wavering tone warning signal alerts the base of?
What does the wavering tone warning signal alert a base for
What is the wavering tone warning signal alerts the base for?
air attack
What is the wavering tone warning signal alerts the base is what?
air attack
Wavering tone warning signal alerts the base of what?
Air attacks
Who decised to implement split MOPP?
Installation Commander
What does a wavering tone warning signal alert a base of?
Air Attacks
What does the wavering tone warning signal alert the base of?
air attack
What does the waivering tone warning signal alerts the base of?
air attacks
The waving tone warning signal alerts the base of?
air attacks
What does the wavering tone warning signal?
attack
What does the wavering tone signal mean?
attack
