Create Unidentified signal

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Instructions

Using this form, you can submit a new signal entry to the Unidentified Signals Database. There are a number of things to keep in mind:

Title

There are no standard rules for this, a convention many use is "Unknown XXpXXX", where XXpXXX is the frequency your unidentified signal was found at in MHzMegaHertz (MHz) 10^6 Hz, where the 'p' denotes the decimal point. e.g. 34p544 = 34.544 MHzMegaHertz (MHz) 10^6 Hz. You may deviate from this freely, so long as it describes something about your unidentified signal.

Picture

The picture rules are more relaxed for Unidentified Signals than for Identified signals. All that is asked is that you do your best to get as high quality of a waterfall image as possible. For example, don't do this or this. To exemplify this, This and This are both the same signal, but one of them is much more detailed than the other. Zoom and FTT Resolution makes a significant difference.

Frequencies

List the frequencies that you have seen the signal to exist at. Have multiple frequencies separated by a comma. Be sure to add the suffix HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)., kHzKiloHertz (kHz) 10^3 Hz, MHzMegaHertz (MHz) 10^6 Hz, GHzGigaHertz (GHz) 10^9 Hz, etc to properly list the frequencies.

Mode

These modes follow the SDRSharp naming convention for simplicity. NFMNarrowband Frequency Modulation = Narrowband FMFrequency Modulation. Any FMFrequency Modulation-modulated signal besides FMFrequency Modulation-Radio should be received in Narrowband FMFrequency Modulation. USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) = Upper Side Band Modulation, this is the default for signals recorded on HFHigh Frequency (3-30 MHz), or otherwise non-DSBDual Side Band Modulation (Dual Side Band) or AMAmplitude Modulation (Amplitude Modulation) signals. For any other signal that is either too wide or unlistenable using the other modes, use RAW.

Modulation

If you know what modulation the signal uses, put it here. Otherwise, leave blank.

Bandwidth

Do your best to figure out the best fit for the bandwidth of a signal. If the signal seems to fit tightly at 1968 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)., 2000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). is a good number to choose for the bandwidth. It is known that bandwidth will be affected by the strength of the signal, so try to list an average or ideal reception bandwidth that will be more or less within the range of error for significantly weak or stronger receptions of the signal. If the signal has multiple modes that come with multiple bandwidths, list them with commas.

Location

Unlike the identified signal section, this field corresponds to where you have received the signal (e.g. Your location. Can be as vague as the country, or as specific as the city or town). However if you know the source, then use the source location as the location field.

Signal Audio File

IMPORTANT: This file MUST be an .mp3 file. NO WAV's! Use MP3Cut.net to convert your wav file as well as trim it to the part you want to upload. Preferably keep this file size below 1 MB. For any sound samples above 1 MB, you may include those in the Long Description. This recording should match the mode in which the signal is optimally received (an FMFrequency Modulation-modulated FSKFrequency-Shift Keying signal recorded with NFMNarrowband Frequency Modulation, not USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables))

Signal IQ zip file

This is REQUIRED, especially for non-USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) signals. The IQ can be recorded using SDRSharp and using RAW and recording the 'audio', which actually makes an IQ file of only the area you selected with RAW, saving a lot of file size space. If the IQ file zip is too large, upload to a filehosting site like Mega.nz and link the IQ file in the Long Description.

Short description

Usually no more than two lines briefly summarizing the signal's behavior, possible identifications, etc.

Categories

This is optional. You can find the list of established categories here.

Form

Title
Picture Please upload a clear waterfall image that will display on the main page. Upload file
Frequencies Please specify list of frequencies separated by comma. Remember to include the unit after each number (e.g HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)., kHzKiloHertz (kHz) 10^3 Hz, MHzMegaHertz (MHz) 10^6 Hz, GHzGigaHertz (GHz) 10^9 Hz).
Mode Please specify the demodulation mode (e.g. AMAmplitude Modulation, FMFrequency Modulation, WFMWideband Frequency Modulation, USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables), LSBLower Side Band Modulation).
Modulation Please specify the modulation (e.g. FSKFrequency-Shift Keying, ASKAmplitude-Shift Keying, PPMPulse Position Modulation, QAMQuadrature Amplitude Modulation).
Bandwidth Please specify list of frequencies separated by comma. Remember to include the unit after each number (e.g HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)., kHzKiloHertz (kHz) 10^3 Hz, MHzMegaHertz (MHz) 10^6 Hz, GHzGigaHertz (GHz) 10^9 Hz).
Location If specific to a location please specify, otherwise specify Worldwide.
Signal audio file Please upload an MP3 audio file that will be displayed on the front page. Upload file
Signal IQ zip file If you have a zipped IQ file that is less than 8mb please upload it here. Upload file
Short description Enter a short description that will show on the main page.
Categories Please specify categories separated with comma. Please choose from: Military, Radar, Commercial, Active, Inactive, Amateur Radio, Satellite, Time, Marine, Numbers Stations, Aviation, Analogue, Digital, Navigation, Utility, Trunked Radio, VLFVery Low Frequency (3-30 kHz), LFLow Frequency (30-300 kHz), MFMedium Frequency (300-3000 kHz), HFHigh Frequency (3-30 MHz), VHFVery High Frequency (30-300 MHz), UHFUltra High Frequency (300-3000 MHz).



Long description