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Active frequencies can be found by searching the internet and frequency reference books [3] or can be discovered through a programmable scanner's search function. Antenna modifications may be used. For example, an external antenna can be used for a desktop scanner or an extendable antenna for a hand held unit will provide greater performance ...
Like CB, MURS frequencies may be used for business or personal/family communications. Two of these frequencies were re-allocated from the Business/Industrial Radio Pool (Business Radio Service). These two frequencies were often used illegally by businesses as they were/are part of the "color dot" frequencies that handheld "on-site" business ...
For much of the 20th century, 500 kHz was the primary international distress frequency. Its use has been phased out in favor of the Global Maritime Distress Safety System. Use of some distress frequencies is permitted for calling other stations to establish contact, whereupon the stations move to another frequency.
Frequency sweeps may be used by regulatory agencies to monitor the radio spectrum, to ensure that users only transmit according to their licenses.The FCC for example controls and monitors the use of the spectrum in the U.S.
A repeater with an input of 33.980 MHz and an output of 46.140 MHz is a same band repeater. In same band repeaters, a central design problem is keeping the repeater's own transmitter from interfering with the receiver. Reducing the coupling between transmitter and input frequency receiver is called isolation.
See also: List of radio stations in the Philippines § Stations by region or province The following is a list of NTC -licensed radio stations in Metro Manila, a region of the Philippines, current as of 2024. The tables can be sorted by call sign, branding, frequency, location, owner, languages and radio format. Also included below are defunct radio stations and Internet-only stations. Radio ...
In addition to the bands listed above, paging may be authorized on any frequency in the land mobile bands authorized under Part 90 of the FCC rules, including frequencies in the 72-76 MHz band as well as the usual 30.56-49.58 MHz, 150.775-162.000 MHz VHF bands and the 450-470 MHz band (plus 421-430 or 470-512 MHz in certain cities).
The Philippine Amateur Radio Association Inc. (PARA) is a national non-profit organization for amateur radio enthusiasts in the Philippines.Key membership benefits of PARA include the sponsorship of amateur radio operating awards and radio contests, and a QSL bureau for those members who regularly communicate with amateur radio operators in other countries.