(i) Inspectors should note that equipment incorporating more than one product is not exempt from the technical standards of this Part unless all devices in the equipment meet the exemption criteria. If only one of the included equipment qualifies for an exemption, the rest of the equipment must comply with all applicable regulations. If a product fulfills more than one function and not all of these functions meet the criteria for an exemption, the product cannot be included in the exemptions. Type approval: Similar to certification, except that it usually applies to radio transmitters used in an authorized radio service. Equipment subject to type approval includes: mobile terrestrial transmitters such as mobile radio transmitters or police, fire and business transmitters; transmitters used in maritime and aviation security services; and CB and other stations used in the Personal Radio Services. Amateur radio transmitters do not require type approval, although external RF power amplifiers and kits require type approval. At the end of the day, that is why the Part 15 rules exist, although some might argue that they are too conservative and strict. (4) An actual transmission switch is not required for a TV interface device, including a cable system terminal that has one or more antenna input terminals. provided that the circuit located after the input port(s) of the antenna has sufficient bandwidth to permit reception of all television transmission channels approved in accordance with Part 73 of this Chapter, and: A cable system terminal capable of switching between the reception of a cable television service and an antenna can demonstrate that it meets the isolation requirement set out in subparagraph (c)(1)(i) of the this section; For all other television interface equipment, the maximum voltage at the antenna connector(s) shall not exceed the limit laid down in point (c)(1)(ii) of this Section. “I strongly support reducing red tape and unnecessary delays. But we must not diminish our commitment to preventing harmful interference with authorized radio communications. Regardless of our device approval procedures, there is a risk that some products may not be designed to minimize the risk of interference.
And this will also remain a problem for individuals who build or operate transmitters in defiance of our rules. I can also imagine that the derogations would be difficult to apply. Without a revocation license, how could the FCC verify that someone is complying with the new limit without fundamentally strengthening enforcement action on the ground? In addition, there are no FCC-certified broadcasters available on the market that would foot the bill. I doubt whether the Commission will want to tacitly endorse the currently illegal channels found everywhere in online markets. Hoppe: Whatever you do, avoid buying anything from sites like Amazon or eBay at all costs. This is a recipe for disaster. Most, if not all, of the FM stations you find on these websites are made in China and are not FCC certified. Here are the rules for periodic issuers. They can operate on almost all frequencies above 70 MHz (with the exception of those prohibited below 15,205). This includes all amateur bands above 144 MHz. When buying a Part 15 transmitter, always look for the FCC ID number (and check it with the FCC database to make sure it`s legit) AND make sure the antenna is firmly attached to the device.
Any device with a detachable antenna with a standard or standard jack such as a BNC, UHF, N-Type connector, etc. is not legal under Part 15 regulations and can make you liable for hefty FCC fines. While a variety of AM Part 15 transmitters have been on the market for years, a new system called “Parking Lot Radio” is currently under development. The project website states: Hoppe: Some customers have asked me if I could set them up with an FM transmitter that covers an area of several kilometers. Unfortunately, while we sell LPFM transmitters that can offer this type of range, there is no legal way for them to do so. You would need a license for this type of power supply and RF range. Fortunately, there is a legal way to cover the area of a medium-sized car park. You can use one of our FCC-certified FM Part 15 transmitters. FM stations certified under Part 15 can be legally used by anyone, anywhere in the United States, without the need for a licence. For best results with a Part 15 transmitter, we recommend that the customer place the transmitter as close as possible to the center of the car park. This requires the use of a long extension cable for power and a relatively long audio cable. Then they have to use their car stereo to look for a free seat on the FM dial, and then simply tune their station to that frequency.
As soon as the client understood this concept, he contacted us with very good results! Check out official government documents on rules and regulations for radio frequency equipment Hobby Broadcaster should be the very first place you visit, where owner Bill DeFelice did the hard work of testing and examining stations and writing instructions for legal and efficient unlicensed broadcasting. We spoke to Bill in episode #120 of our podcast, and I humbly suggest that this is a must if you`re even considering moving on to Part 15. (1) Basic voting mechanism. If a television receiver is equipped to allow repeated access to VHF television channels in discrete tuning positions, that receiver shall be equipped to allow repeated access to at least six UHF television channels in discrete tuning positions. Unless a separate tuning position is provided for each channel assigned to UHF TV, each position must be easily adjustable by the user on a specific UHF channel without the use of tools. If 12 or fewer discrete tuning positions are provided, each position must be adjustable to receive any UHF TV channel. First, let`s define the most important terms that apply to any discussion of Part 15 rules. Some of these definitions come directly from FCC rules.
The applicable Rule Section Part 15 is marked with the section symbol (§). The current FCC rules are printed in italics in this document. It should be noted that both rules set the cut-off greater than 1705 kHz. This should record a center frequency of 1700 kHz. Thus, operating on 1710 kHz does not fall under the above rules, which apply to the AM band. The frequency 1710 kHz with an AM broadcaster would fall below the general radiated emission limits of 100 microvolts per metre at 30 metres. If you don`t have a field gauge and can take measurements, it`s best to stay away from 1710 kHz. (e) digital equipment assemblies are not subject to the technical standards set out in this Part, unless they are marketed as part of a system; In this case, the resulting system must comply with the applicable rules. Subsets include: “How can we best ensure compliance with these rules without unnecessarily impeding the flow of useful products to market? This is the subject of this article. For more information on this topic and some rules for unlicensed devices in other countries, see recnet.com/unlicensed In other words, the antenna must be firmly attached to the transmitter or use a single type of RF connector. So I realize that some Chinese manufacturers have pulled a quick one from the FCC and obtained an identification number for a transmitter that uses a standard BNC connector, which cannot be legal under Part 15 regulations.
But there are other potential problems that can be widespread. These need to be addressed on a broader front. To do this, the ARRL participates in industry standards bodies, maintains contact with the industry, and maintains regular contact with the FCC.
Recent Comments