Hot answers tagged

18

The GMRS and FRS bands are governed by the FCC and have specific requirements not just for use and power output, but for equipment that is allowed. One of the requirements is that radios used for GMRS service be part 95 certified and FCC certified for GMRS use: §95.129 Station equipment. Every station in a GMRS system must use transmitters the FCC has ...


8

Are there any documented cases of the FCC actually tracking down and harassing/fining/jailing people for illegal FRS/GMRS transmissions of this sort? You can browse the Enforcement Bureau's Field Notices at http://transition.fcc.gov/eb/FieldNotices/. I did find a few related to FRS violations, e.g. several cases where a company (or even a township water ...


8

The short answer: this is probably technically feasible, but it's not legal. Part 95 of the Code of Federal Regulations is where all the rules on personal radio services (which includes FRS, GRMS and amateur services) are found. §95.631 specifically regulates permitted emission types. Here are the relevant passages for GMRS: §95.631 (a): "A non-voice ...


7

Before getting my ham license I used MURS on my baofeng with no problems because there is simply no MURS traffic in my area. If I were still an unlicensed operator then I would still be using MURS with my baofeng UV-5R. But once you get the Technician license the penalties go way up (or at least the enforcement) and a ham doesn't need to use MURS anyway. ...


4

The BF-888S radios have a 16-channel knob on the top and no LCD display nor a number keypad. The BF-888S is marketed all over the world for use mostly in licensed commercial operation or licensed Amateur Radio. The BF-888S can be programmed to use frequencies in the range of 400 to 470MHz which nicely permits programming the radios for the 70cm Amateur ...


4

A wide FM transmission in a narrow FM receiver is effectively overmodulation: the excessive deviation of the transmitter results in the instantaneous frequency of the transmission deviating outside the bounds of what the receiver is designed for. A practical FM receiver will pass the signal through a channel filter before demodulation. The objective of this ...


3

In fact, almost everything that was previously sold as an FRS/GMRS radio is now an FRS radio. "In 2017, the FCC changed its rules to stop equipment authorization of FRS dual-service radios and it changed the rules for both FRS and GMRS such that existing radios would be reclassified as either FRS or GMRS to remove the confusion of whether a license was ...


2

As Phil Frost's answer already said, if the audio is at full amplitude the modulated signal will exceed the channel filter's bandwidth and the resulting audio will be distorted. From a time-domain audio processing perspective, we could describe the effect approximately as if the signal fades out whenever the modulation exceeds the passband of the channel ...


2

It also depends on the legal users of that part of the spectrum who may land up monitoring violations and reporting to FCC. Eg ARRL has monitoring volunteers who monitor for amateur band violations. I would think that it will be in the commercial interest of the cellular companies to monitor any abuse of their frequency spectrum and report t violations to ...


2

There's 3 potential solutions to this. Ham Radio. Granted you need a license, but it's free, so long as you take and pass a somewhat simple test. You could get several good radios for about \$140 each, or decent ones around \$35. They would easily work at the range of 3 miles. If you just want cell redundancy service, then these would work excellent via ...


1

Is it possible to use an ordinary GMRS/FRS UHF handheld set for data communications? In principle: yes. You see, you're talking about voice communication devices. If now, on one end, someone spoke "zero one zero one…", obviously, you could communicate arbitrary data through that voice-optimized channel. In reality, you'd use a device that modulates the ...


1

The best way to use a Baofeng to communicate with any walkie talkie is to: Find the frequency. Make sure you are on the right frequency by transmitting from the midland walkie talkie to your Baofeng. Run a tone decoder. In the option "R-CTCS", the bafeng has a tone decoder by pressing either the # button or the * button. When the tone decoder is running, ...


1

Yes, transmitting with that kind of power is illegal. The max power you may transmit with would be 1/2 of a watt (0.5 watt - 500mw). Their are other factors that make it illegal as well such as the bandwidth you are using while transmitting, spurious emissions, not having a license to transmit on GMRS, and using a detachable antenna. The radio is also most ...


1

You cannot use it to communicate with any standard walkie talkies, whether they use CB, FRS, GMRS, or MURS. Everything has been addressed except the MURS & CB ones(well, one did but they got it wrong, no offense.) This is a pretty good website if you want a detailed explanation of why you can't use MURS https://sites.google.com/site/mursradio2/...


Only top voted, non community-wiki answers of a minimum length are eligible