Weird Signal on Multiple Frequencies

I get this weird signal at multiple places across the bands ... - Reddit

I get this weird signal at multiple places across the bands, gets worse if I have the gain higher than 20dB and seems to go away when I don't have an antenna ...

Weird Signal on Multiple Frequencies - Signal Identification Wiki

For some reason I've been scanning frequencies and this has come up on about 10 of them. Anyone know what this is?

Transmissions coming through a different frequency

If you are hearing the same signal on 121.5 on two scanners in the same location at the same time there is nothing weird about that. Did you ...

Talk:Weird Signal on Multiple Frequencies - Signal Identification Wiki

Talk:Weird Signal on Multiple Frequencies ... liu-shuyuan: This might be noise from switching mode power supplies, e.g. computer power bricks, ...

Why does a signal have multiple frequencies? What causes these ...

A single frequency signal carries no information. It's just an “always has been on, always will be on” sine wave. There is no variation of any ...

Receiving multiple signal - antenna - Amateur Radio Stack Exchange

But: in between there is a transmission path with reflections. Some frequencies are attenuated and some other frequencies are even stronger than ...

Mystery signal that slides up and down within frequency ranges

I can identify many signal types on the HF bands but this one has me stumped. ... I've been monitoring this strange "mystery" signal that slides ...

What is 'spectrum' anyway? How can multiple frequencies exist in ...

Frequency is repeating changes. If the change in voltage is regular and repeats 1,000 times per second we say that the signal has a 1KHz ...

What does it mean to be on different frequencies but still be ... - Quora

Put simply, it means that your radio or other signal is changing carrier frequencies. It's typically done in a systematic way, such that you and ...

How To Identify Mysterious Radio Signals - YouTube

I uncovered a mysterious radio signal on 72MHz and wanted to figure out what it was. The signal was obviously digital and using BPSK, ...

INTERCEPTING WEIRD RADIO SIGNALS on the 868Mhz BAND

So I wanted to scan around the 868Mhz band as its quite a busy area for a myriad of devices and you wont believe what I found!

Discrete-Time Fourier Transform: Why are signals at frequencies ...

Because if your signal has a frequency of even multiple of π, you get xk=sin(2kπ+ϕ)=sin(ϕ) which is constant. With odd multiples of π you ...

Strange attenuation of different frequencies - Audacity Forum

My problem is that if I send the signal through a loudspeaker to a microphone, the sinusoids in the received signal show very different attenuations which I ...

[SOLVED] - Why don't two signals of different frequencies interfere?

In a way, all the waves 'modulate' the EM field at that point. At each instant in time, the signal induced into the aerial is that sum. That's OK; all of the ...

RF Safety FAQ | Federal Communications Commission

The frequency of an RF signal is usually expressed in terms of a unit called the "hertz" (abbreviated "Hz"). One Hz equals one cycle per second. One megahertz ...

Why don't radio stations interfere with each others broadcasts?

The only real danger that can corrupt the signal are multiple signals on the same frequency (which will usually create noise on the stronger ...

General pool, section G8B - HamStudy.org

In the front end of a receiver, the incoming signal is at a fixed frequency. The only thing we have control over is the LO frequency. As this local oscillator ...

Wow! signal - Wikipedia

The entire signal sequence lasted for the full 72-second window during which Big Ear was able to observe it, but has not been detected since, despite many ...

Radio Frequency Signal - an overview | ScienceDirect Topics

The modulation frequency is equal to half the difference between the frequencies of the two tones. ... odd harmonics of the fundamental frequency, so the ...

Reduction of the received signal strength variation with distance ...

However, the quick changes in signal strength impact the localization precision. By averaging over access points (APs) with multiple frequencies ...