Step 8: Once this is complete, all VHF channels will be successfully imported into your radio. Next, since this is a dual band radio, we will need to import all the UHF channels. Please repeat the previous steps provided, however, instead of using the 2 meters (144MHz) band we will be using the '70 centimeters (440MHz) band to locate the UHF frequencies. Nov 26, 2017 The closeness of the MURS and 2-meter bands make it sometimes possible to use the same antenna on both the VHF bands. This is particularly true of the lower 3 MURS channels. Some of the antennas presented here were designed to be used for both 2-meters and MURS. The antennas were designed using NEC-2 on a Debian Linux system. Another piece of radio spectrum, which is part of the same Personal Radio Service (PRS), that many consumers, hams and commercial radio users aren't aware of, is the MURS Band. MURS stands for Multi-Use Radio Service, and is a set of 5 VHF channels usable for both personal and business use, does not require a license, and is typically.
In the United States, the Multi-Use Radio Service (MURS) is a licensed by rule two-way radio service similar to Citizens Band (CB). Established by the U.S.Federal Communications Commission in the fall of 2000, MURS created a radio service allowing for licensed by rule (Part 95) operation in a narrow selection of the VHF band, with a power limit of 2 watts. The FCC formally defines MURS as 'a private, two-way, short-distance voice or data communications service for personal or business activities of the general public.' MURS stations may not be connected to the public telephone network, may not be used for store and forward operations, and radio repeaters are not permitted.
In 2009 Industry Canada (IC) established a five-year transition plan, which would have permitted the use of MURS in Canada starting June 2014.[1] In August 2014 IC announced a deferral of MURS introduction, as 'the Department does not feel that the introduction of MURS devices in Canada is warranted at this time, and has decided to defer the introduction of MURS devices in Canada until a clearer indication of actual need is provided by Canadian MURS advocates and/or stakeholders ..'[2]
Eligibility[edit]
No licenses are required or issued for MURS within the United States.
Any person is authorized to use the MURS frequencies given that it:[3]- Is not a foreign government or a representative of a foreign government.
- Uses the transmitter in accordance with 47 CFR. 95.1309.
- Operates in accordance with the rules contained in Sections 95.1301-95.1309.
- Operates only legal, type-accepted MURS equipment.
Frequencies[edit]
MURS comprises the following five frequencies:
| Channel | Frequency | Maximum authorized bandwidth | Channel name |
|---|---|---|---|
| 1 | 151.82 MHz | 11.25 kHz | MURS 1 |
| 2 | 151.88 MHz | 11.25 kHz | MURS 2 |
| 3 | 151.94 MHz | 11.25 kHz | MURS 3 |
| 4 | 154.57 MHz | 20.00 kHz | Blue Dot |
| 5 | 154.60 MHz | 20.00 kHz | Green Dot |
Murs Vhf Radio Setup That Works Good Night
Channels 1–3 must use 'narrowband' frequency modulation (2.5 kHz deviation; 11.25 kHz bandwidth). Channels 4 and 5 may use either 'wideband' FM (5 kHz deviation; 20 kHz bandwidth) or 'narrowband' FM.[4] All five channels may use amplitude modulation with a bandwidth up to 8 kHz.[5] MURS falls under part 95 and was not mandated for narrow-banding, such as those of Part 90 in the public service bands by January 2013.
Because previous business band licensees who have maintained their active license remain grandfathered with their existing operating privileges, it is possible to find repeaters or other operations not authorized by Part 95 taking place. These are not necessarily illegal. If legal, such operations may enjoy primary status on their licensed frequency and as such are legally protected from harmful interference by MURS users.[6]
Range[edit]
MURS range will vary, depending on antenna size and placement. With an external antenna, ranges of 10 miles (16 km) or more can be expected.[7][citation needed]
Authorized modes[edit]
| Designator | Common name |
|---|---|
| A1D | Amplitude modulation; on off keyed or quantized; no modulation; Data, telemetry, telecommand |
| A2B | Amplitude modulation; Digital, with modulation; Telegraphy for machine copy (RTTY, fast Morse) |
| A2D | Amplitude modulation; Digital, with modulation; Data, telemetry, telecommand |
| A3E | Amplitude modulation; Single analog channel; Telephony, voice, sound broadcasting |
| F2B | Angle modulation, straight FM; Digital, with modulation; Telegraphy for machine copy (RTTY, fast Morse) |
| F1D | Angle modulation, straight FM; on off keyed or quantized; Data, telemetry, telecommand |
| F2D | Angle modulation, straight FM; Digital, with modulation; Data, telemetry, telecommand |
| F3E | Angle modulation, straight FM; Single analog channel; Telephony, voice, sound broadcasting |
| G3E | Angle modulation, phase modulation; Single analog channel; Telephony, voice, sound broadcasting |
Permitted areas of operation[edit]
What Is Murs Radio
MURS operation is authorized anywhere a CB station is authorized and within or over any area of the world where radio services are regulated by the FCC. Those areas are within the territorial limits of:
- The fifty United States
- The District of Columbia
- Caribbean Insular areas
- Commonwealth of Puerto Rico
- United States Virgin Islands (50 islets and cays)
- Pacific Insular areas
- American Samoa (seven islands)
- Commonwealth of Northern Mariana Islands
- Guam Island
- Johnston Atoll (Islets East, Johnston, North and Sand)
- Midway Atoll (Islets Eastern and Sand)
- Palmyra Atoll (more than fifty islets)
- Aboard any vessel of the United States, with the permission of the captain, while the vessel is traveling either domestically or in international waters.
Restrictions[edit]
- Transmitter power output is limited to 2 watts.
- The highest point of any MURS antenna must not be more than 18.3 meters (60 feet) above the ground or 6.10 meters (20.0 feet) above the highest point of the structure to which it is mounted, whichever is higher.[8]
- Transmitting on MURS frequencies is not allowed while aboard aircraft in flight.[8]
- When transmitting in Puerto Rico, Desecheo, Mona, Vieques, and Culebra, care must be taken to not interfere with the Arecibo Observatory.
- Devices that use MURS must be specially labeled and certified.[7]
Products[edit]
There are a wide variety of radio products that use MURS frequencies. MURS devices consist of wireless base station intercoms, handheld two-way radios, wireless dog training collars, wireless public address units, customer service callboxes, wireless remote switches, and wireless callboxes with or without gate opening ability.
Since MURS uses standard frequencies, most devices that use MURS are compatible with each other.
Most analog two way radios utilize a technology called CTCSS or DCS that helps block out unwanted transmissions. To make MURS two way radios work together, they must have matching CTCSS or DCS tones. This can usually be done via basic programming which almost all MURS two way radios support.
The goTenna version1 (non-mesh) digital radio product operates on the MURS band and pairs with smartphones to enable users to send texts and share locations on a peer-to-peer basis. goTenna is not interoperable with other MURS devices, even though they operate on the same spectrum, employing 'listen-before-talk' to reduce interference in the band's five channels.[9][10][11]
Notable Users[edit]
According to Bill Fawcett's Spaniel Journal, Spaniel pro-handler Dan Langhans was given a set of VHF business-band radios on the frequency of 154.57 MHz which became known by the trade as 'blue dot' radios.[12] Blue-dot is now frequency number 4 in the MURS frequency specification table.
Murs Vhf Radio Setup That Works Good For You
Walmart and Sam's Club use a two way radio, made by Motorola Solutions, model Motorola RDM2070D, which is exclusive to Walmart and Sam's Club. The Motorola RDM2070D is preprogrammed on MURS frequencies with most channels using CTCSS tone 21/4Z/136.5Hz.[13]
See also[edit]
References[edit]
- ^'Spectrum Allocation and Utilization Policy Regarding the Use of Certain Frequency Bands Below 1.7 GHz for a Range of Radio Applications'(PDF). Industry Canada. June 2009. Retrieved September 2, 2011.
A five-year transition period is established from the publication date of this spectrum policy, after which the distribution and sale of MURS devices will be permitted.
- ^http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf10822.html
- ^http://wireless.fcc.gov/services/index.htm?job=service_home&id=multi_use
- ^
- ^
- ^
- ^ abhttp://www.fcc.gov/encyclopedia/multi-use-radio-service-murs-0
- ^ abhttp://www.gpo.gov/fdsys/pkg/CFR-2009-title47-vol5/pdf/CFR-2009-title47-vol5-part95.pdf
- ^'Hacker News — goTenna'. news.ycombinator.com. Retrieved 3 November 2015.
- ^Statt, Nick. 'GoTenna creates a cell network out of thin air anywhere on Earth'. CNET. CBS Interactive. Retrieved 3 November 2015.
- ^Nelson, Patrick. 'Device lets smartphones communicate during network outage'. Network World. Network World. Retrieved 3 November 2015.
- ^Everything You Always Wanted to Know About Blue Dot Radios.. But Were Afraid to Ask
- ^Multi-Use Radio Service (RadioReference)
External links[edit]
Craig's Citizen Radio and Scanner PageShortcuts to topics on this page Radio and Scanner Links FRS and GMRS Radio Chrome addons word countertop. FRS frequencies are interleaved with GMRS frequencies. GMRS radios are also authorized to transmit on FRS channels 1 to 7 with no more than 5 watts and using 5 Khz deviation. All FRS channels are simplex, with 3 Khz deviation, 500 milliwatts output, and fixed antennas only. GMRS has expanded capability in power and external antennas allowed. GMRS uses 467 Mhz frequencies as repeater input channels. NOTE: There are a large number of very inexpensive radios available with both FRS and GMRS frequencies in them so, if you are using a licensed GMRS radio do not be surprised if you receive interference from someone who did not bother to get their GMRS license.
FCC GMRS Page. Information and Licensing JUNE 2010About 11 years ago I wrote on this page that GRMS would be like CB radio after Audiovox released a FRS radio with GRMS frequencies on it. People sent me nasty emails complaining I was encouraging people to break the rules when all I was doing was predicting the future based on my past experience in the CB radio business, well, I TOLD YOU SO!........... The FCC is proposing a massive rewrite of its Part 95 rules. These are the regulations that govern such public available two-way radio as the General Mobile Radio Service, the Family Radio Service, and 11-meter CB, to mention only a few. Further As to the Family Radio Service, the FCC proposes to prohibit the authorization of radios that combine FRS with other safety-related services. In other words, an FRS radio would have to be a Family Radio Service only transceiver and it would become illegal to manufacture an FRS radio that could work with or in any service other than channels where FRS Multi-Use Radio Service (MURS) Update 2009. Looks like my guess years ago was in error. Doesn't seem to be much happening on MURS. I suppose everyone is relying on their Cell phone. The hottest, most recent, controversial, addition to 'Family / CB' Radio is MURS. Established at the end of 2000 MURS has taken channels from the 151 Mhz VHF business band and given them to 'Family Radio'.
The 'Dot' Frequencies The frequencies below are commonly called 'dot' frequencies as 5 watt or less portables are sold with these frequencies named for the color of the dot on the radio. I can get no clear reading of what the rules are on these frequencies. Some of them are really MURS frequencies and some are labeled ' incinerate '. If you really want to know I suggest a Google search. These frequencies are found in radios sold to contractors, security companies, schools and anyone else looking for inexpensive portable radios. I haven't a clue on the license requirements as most people just buy them and start using them. Google 'jobcom radio' and you will find lots of vendors. |
Frequencies[edit]
MURS comprises the following five frequencies:
| Channel | Frequency | Maximum authorized bandwidth | Channel name |
|---|---|---|---|
| 1 | 151.82 MHz | 11.25 kHz | MURS 1 |
| 2 | 151.88 MHz | 11.25 kHz | MURS 2 |
| 3 | 151.94 MHz | 11.25 kHz | MURS 3 |
| 4 | 154.57 MHz | 20.00 kHz | Blue Dot |
| 5 | 154.60 MHz | 20.00 kHz | Green Dot |
Murs Vhf Radio Setup That Works Good Night
Channels 1–3 must use 'narrowband' frequency modulation (2.5 kHz deviation; 11.25 kHz bandwidth). Channels 4 and 5 may use either 'wideband' FM (5 kHz deviation; 20 kHz bandwidth) or 'narrowband' FM.[4] All five channels may use amplitude modulation with a bandwidth up to 8 kHz.[5] MURS falls under part 95 and was not mandated for narrow-banding, such as those of Part 90 in the public service bands by January 2013.
Because previous business band licensees who have maintained their active license remain grandfathered with their existing operating privileges, it is possible to find repeaters or other operations not authorized by Part 95 taking place. These are not necessarily illegal. If legal, such operations may enjoy primary status on their licensed frequency and as such are legally protected from harmful interference by MURS users.[6]
Range[edit]
MURS range will vary, depending on antenna size and placement. With an external antenna, ranges of 10 miles (16 km) or more can be expected.[7][citation needed]
Authorized modes[edit]
| Designator | Common name |
|---|---|
| A1D | Amplitude modulation; on off keyed or quantized; no modulation; Data, telemetry, telecommand |
| A2B | Amplitude modulation; Digital, with modulation; Telegraphy for machine copy (RTTY, fast Morse) |
| A2D | Amplitude modulation; Digital, with modulation; Data, telemetry, telecommand |
| A3E | Amplitude modulation; Single analog channel; Telephony, voice, sound broadcasting |
| F2B | Angle modulation, straight FM; Digital, with modulation; Telegraphy for machine copy (RTTY, fast Morse) |
| F1D | Angle modulation, straight FM; on off keyed or quantized; Data, telemetry, telecommand |
| F2D | Angle modulation, straight FM; Digital, with modulation; Data, telemetry, telecommand |
| F3E | Angle modulation, straight FM; Single analog channel; Telephony, voice, sound broadcasting |
| G3E | Angle modulation, phase modulation; Single analog channel; Telephony, voice, sound broadcasting |
Permitted areas of operation[edit]
What Is Murs Radio
MURS operation is authorized anywhere a CB station is authorized and within or over any area of the world where radio services are regulated by the FCC. Those areas are within the territorial limits of:
- The fifty United States
- The District of Columbia
- Caribbean Insular areas
- Commonwealth of Puerto Rico
- United States Virgin Islands (50 islets and cays)
- Pacific Insular areas
- American Samoa (seven islands)
- Commonwealth of Northern Mariana Islands
- Guam Island
- Johnston Atoll (Islets East, Johnston, North and Sand)
- Midway Atoll (Islets Eastern and Sand)
- Palmyra Atoll (more than fifty islets)
- Aboard any vessel of the United States, with the permission of the captain, while the vessel is traveling either domestically or in international waters.
Restrictions[edit]
- Transmitter power output is limited to 2 watts.
- The highest point of any MURS antenna must not be more than 18.3 meters (60 feet) above the ground or 6.10 meters (20.0 feet) above the highest point of the structure to which it is mounted, whichever is higher.[8]
- Transmitting on MURS frequencies is not allowed while aboard aircraft in flight.[8]
- When transmitting in Puerto Rico, Desecheo, Mona, Vieques, and Culebra, care must be taken to not interfere with the Arecibo Observatory.
- Devices that use MURS must be specially labeled and certified.[7]
Products[edit]
There are a wide variety of radio products that use MURS frequencies. MURS devices consist of wireless base station intercoms, handheld two-way radios, wireless dog training collars, wireless public address units, customer service callboxes, wireless remote switches, and wireless callboxes with or without gate opening ability.
Since MURS uses standard frequencies, most devices that use MURS are compatible with each other.
Most analog two way radios utilize a technology called CTCSS or DCS that helps block out unwanted transmissions. To make MURS two way radios work together, they must have matching CTCSS or DCS tones. This can usually be done via basic programming which almost all MURS two way radios support.
The goTenna version1 (non-mesh) digital radio product operates on the MURS band and pairs with smartphones to enable users to send texts and share locations on a peer-to-peer basis. goTenna is not interoperable with other MURS devices, even though they operate on the same spectrum, employing 'listen-before-talk' to reduce interference in the band's five channels.[9][10][11]
Notable Users[edit]
According to Bill Fawcett's Spaniel Journal, Spaniel pro-handler Dan Langhans was given a set of VHF business-band radios on the frequency of 154.57 MHz which became known by the trade as 'blue dot' radios.[12] Blue-dot is now frequency number 4 in the MURS frequency specification table.
Murs Vhf Radio Setup That Works Good For You
Walmart and Sam's Club use a two way radio, made by Motorola Solutions, model Motorola RDM2070D, which is exclusive to Walmart and Sam's Club. The Motorola RDM2070D is preprogrammed on MURS frequencies with most channels using CTCSS tone 21/4Z/136.5Hz.[13]
See also[edit]
References[edit]
- ^'Spectrum Allocation and Utilization Policy Regarding the Use of Certain Frequency Bands Below 1.7 GHz for a Range of Radio Applications'(PDF). Industry Canada. June 2009. Retrieved September 2, 2011.
A five-year transition period is established from the publication date of this spectrum policy, after which the distribution and sale of MURS devices will be permitted.
- ^http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf10822.html
- ^http://wireless.fcc.gov/services/index.htm?job=service_home&id=multi_use
- ^
- ^
- ^
- ^ abhttp://www.fcc.gov/encyclopedia/multi-use-radio-service-murs-0
- ^ abhttp://www.gpo.gov/fdsys/pkg/CFR-2009-title47-vol5/pdf/CFR-2009-title47-vol5-part95.pdf
- ^'Hacker News — goTenna'. news.ycombinator.com. Retrieved 3 November 2015.
- ^Statt, Nick. 'GoTenna creates a cell network out of thin air anywhere on Earth'. CNET. CBS Interactive. Retrieved 3 November 2015.
- ^Nelson, Patrick. 'Device lets smartphones communicate during network outage'. Network World. Network World. Retrieved 3 November 2015.
- ^Everything You Always Wanted to Know About Blue Dot Radios.. But Were Afraid to Ask
- ^Multi-Use Radio Service (RadioReference)
External links[edit]
Craig's Citizen Radio and Scanner PageShortcuts to topics on this page Radio and Scanner Links FRS and GMRS Radio Chrome addons word countertop. FRS frequencies are interleaved with GMRS frequencies. GMRS radios are also authorized to transmit on FRS channels 1 to 7 with no more than 5 watts and using 5 Khz deviation. All FRS channels are simplex, with 3 Khz deviation, 500 milliwatts output, and fixed antennas only. GMRS has expanded capability in power and external antennas allowed. GMRS uses 467 Mhz frequencies as repeater input channels. NOTE: There are a large number of very inexpensive radios available with both FRS and GMRS frequencies in them so, if you are using a licensed GMRS radio do not be surprised if you receive interference from someone who did not bother to get their GMRS license.
FCC GMRS Page. Information and Licensing JUNE 2010About 11 years ago I wrote on this page that GRMS would be like CB radio after Audiovox released a FRS radio with GRMS frequencies on it. People sent me nasty emails complaining I was encouraging people to break the rules when all I was doing was predicting the future based on my past experience in the CB radio business, well, I TOLD YOU SO!........... The FCC is proposing a massive rewrite of its Part 95 rules. These are the regulations that govern such public available two-way radio as the General Mobile Radio Service, the Family Radio Service, and 11-meter CB, to mention only a few. Further As to the Family Radio Service, the FCC proposes to prohibit the authorization of radios that combine FRS with other safety-related services. In other words, an FRS radio would have to be a Family Radio Service only transceiver and it would become illegal to manufacture an FRS radio that could work with or in any service other than channels where FRS Multi-Use Radio Service (MURS) Update 2009. Looks like my guess years ago was in error. Doesn't seem to be much happening on MURS. I suppose everyone is relying on their Cell phone. The hottest, most recent, controversial, addition to 'Family / CB' Radio is MURS. Established at the end of 2000 MURS has taken channels from the 151 Mhz VHF business band and given them to 'Family Radio'.
The 'Dot' Frequencies The frequencies below are commonly called 'dot' frequencies as 5 watt or less portables are sold with these frequencies named for the color of the dot on the radio. I can get no clear reading of what the rules are on these frequencies. Some of them are really MURS frequencies and some are labeled ' incinerate '. If you really want to know I suggest a Google search. These frequencies are found in radios sold to contractors, security companies, schools and anyone else looking for inexpensive portable radios. I haven't a clue on the license requirements as most people just buy them and start using them. Google 'jobcom radio' and you will find lots of vendors. Auto-Tune Pro Vocal Studio combines Auto-Tune Pro, the industry standard in professional pitch correction, Auto-Key, for automatic key and scale detection, and all 11 of our pioneering AVOX vocal.
Radio and Scanner Links Vendors CheapHam.com Updated August 2009 |
