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In the United States, response codes are used to describe a mode of response for an emergency unit responding to a call. They generally vary but often have three basic tiers: Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens. Alternatively, sirens may be used if necessary ...
Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.
The unit also features a removable button facepanel as an additional anti-theft measure. Many car audio systems (car radios) have a so-called 'radio code' number which needs to be entered after a power disconnection. This was introduced as a measure to deter theft of these devices. If the code is entered correctly, the radio is activated for use.
Distress signal. A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance. A distress signal indicates that a person or group of ...
Both the Amateur Extra Class' 20 words-per-minute (WPM); and General and Advanced classes' 13 WPM Morse code tests, were removed in favor of a standardized 5 WPM as the sole Morse code requirement for both the General and Extra Class licenses.
Specific Area Message Encoding (SAME) is a protocol used for framing and classification of broadcasting emergency warning messages. It was developed by the United States National Weather Service for use on its NOAA Weather Radio (NWR) network, and was later adopted by the Federal Communications Commission for the Emergency Alert System, then subsequently by Environment Canada for use on its ...
Example hex codes look like the following: 90127B92922BC022FF103504422535. A bit telling whether the message is short (15 hex digits) or long (30 hex digits) format. A country code, which lets the worldwide COSPAS/SARSAT central authority identify the national authority responsible for the beacon.
UVB-76 (Russian: УВБ-76; see § Name and callsigns for other callsigns), also known by the nickname "The Buzzer", is a shortwave radio station that broadcasts on the frequency of 4,625 kHz. [1] [2] It broadcasts a short, monotonous buzz tone ⓘ , repeating at a rate of approximately 25 tones per minute, 24 hours per day. [1]
Between 0 and 8 minutes past the hour, RWM transmits a straight unmodulated carrier wave. At 9 minutes past, RWM identifies itself in Morse code . Between 10 and 20 minutes past the hour, RWM transmits a pulse of carrier every second, with the difference between UT1 and UTC in units of one-fiftieth of a second encoded onto the once-per-second ...
Words per minute, commonly abbreviated as WPM (sometimes lowercased as wpm ), is a measure of words processed in a minute, often used as a measurement of the speed of typing, reading or Morse code sending and receiving.