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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?

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What happen to the amplitude modulated signal signal if no modulation signal applied?

If no modulation signal is applied to an amplitude modulated (AM) signal, the output will effectively be a constant carrier wave at the carrier frequency. This means that the amplitude of the signal will remain constant, without any variation or modulation corresponding to an information signal. As a result, the AM signal will not convey any information and will simply be a pure tone at the carrier frequency.


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 passive nob on an amplifier?

The passive knob on an amplifier typically refers to a control that adjusts the signal without adding active amplification, often used for volume or tone adjustments. Unlike active components, passive knobs, such as potentiometers, modify the audio signal through resistance without boosting it, affecting the output levels or frequencies. This allows for fine-tuning the sound while maintaining the integrity of the original audio signal.


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....