I tested 0% signal at 868mhz at about 24km, which was quite impressive as there was a building in the signal type, I couldn`t get anything here on 433mhz or any other place I tested at about 6km. Portable LPD radios are approved in most parts of Europe for royalty-free voice communication with analogue frequency modulation (FM) as part of the regulations for short-range equipment.  with a channel spacing of 25 kHz, for a total of 69 channels. In some countries, LPD devices can only be used with an integrated, non-removable antenna with a legal maximum output power of 10 mW. Have you ever figured out what`s going on with the 433mhz version? Which card did you use for 433 and what parameters? www.unmannedtechshop.co.uk/500mw-unmanned-telemetry-kit-433mhz/ I don`t know why this is exactly the case, I can only assume interference Antennas used: 433mhz Many telemetry and FPV modules sold on legitimate websites seem to have tx power well above the legal limit, for example, this claims 500mW – would I break the law to own and use any of them? As far as I know, it would not be illegal to own one, but it would be illegal to use it 😉 One thing is interesting to note: many people seem to think that an amateur radio license would allow them to use higher powers (for example, 1W @UHF, etc.). This is actually not legal for remote-controlled aircraft models. Hopefully an EU citizen can get involved, but the 433 will be better able to walk through walls, trees, etc. DRSs operate in shared frequencies on an unprotected and interference-free basis. If you believe that the interference is caused by unauthorised transmissions, you must report this to Ofcom. However, before contacting us, you should consult the documentation provided with the device or contact the manufacturer or supplier of the equipment for advice. For more information, see our work on radio wave protection and management.
ETSI is one of the European Standardisation Organisations (ESOs) mandated by the European Commission to publish harmonised European standards for radio equipment. When a designer works with radio and develops a new product, frequency will be one of the biggest decisions to make. The frequency chosen by the designer determines where the product can be used, where the product can be sold, and what the performance of the product is. I`m in the process of developing a nomenclature to build my first drone, and I`m a little confused by radio legislation here in the UK. IR2030 (PDF, 930.9 KB) contains the terms and conditions for the use of DRSs that are exempt from licensing. For a complete list of interface requirements, see Spectrum Information. Voice communication in the LPD band was introduced to reduce the load on the eight (now sixteen) PMR446 channels over shorter ranges (less than 1 km).  You must be a member of diydrones to add comments! I am completely new to Meshtastic.
Which of the two T carriers should I buy for the UK/EU? He says that two frequencies are used in this region, but does not go into details on which is the best or which is most commonly used, etc. So how do I decide what to buy? In ITU Region 2 (Americas), the frequencies used by lpD433 are also within the 70-centimetre band allocated to amateur radio. In the United States, LPD433 radios can only be used by amateur radio operators duly authorized under the FCC`s amateur regulations. In 2006, the European Commission published Decision 2006/771/EC published by the European Commission, which harmonises the technical conditions for spectrum use for a wide range of devices. The decision has been amended since its publication to include new DRD applications. The decision and related amending decisions are available on the European Commission`s website. Initially, the powers to regulate radiocommunications were generally vested in postal authorities. This led to a strong conflict of interest, as the same authorities operated the fast-growing telecommunications systems and feared that the radio`s success would hurt the revenues of the telephone industry. More recently, however, this has not turned out to be the case. The various regulators now act as a way to allocate valuable frequencies to the various applications for which radio is used. Royalty-free frequencies are available for use by a used organization, the best known are; 315 MHz, 433 MHz, 868 MHz, 915 MHz and 2.4 GHz.
Although they are “unlicensed,” there are still regulations that need to be followed. Restrictions include; where they can be used and how long you can transmit to avoid cuasing interference. ETSI has several internal technical groups involved in the development of standards for ATDs. For more information on ATDs, visit the ETSI website. It really depends on your use case and what the 433 MHz bands look like in your area. 433 can be used by anyone commercially and non-commercially (including amateur radio for voice), while 868MHz is more or less reserved for LoRa/Digital applications. If you`re out of luck, the 433MHz performs worse than 868 due to interference from other services/things. Requests for information contained in this factsheet should be SRD.Info@ofcom.org.uk If you wish to carry out technology development or testing with SRD devices, you must apply to Ofcom for an unavailable licence.
I have the same 433 antennas as you, from the same seller. I have the meshtastic 1.1 card which is also the same as yours, I think? LPD is also used in keyless vehicle access devices, garage or gate door openers, and some outdoor home weather stations. This is a useful summary of the different frequency bands and permissible power levels: stakeholders.ofcom.org.uk/spectrum/information/licence-exemp. Regulations and controls are necessary for the operation of the radio. If you have not ensured that there are harmonic frequencies, elements can be transmitted, not only on the frequency you need, but also on various others. Not only would this reduce the likelihood that your transmission would be received by the intended receiver, but your signal could also be blocked by other transmissions in the environment or received by an unintended receiver. Since childhood, the use of radio has been subject to extensive controls. These controls often fall at the feet of the government agencies responsible for sanctioning these frequencies. These controls include: European keyless remote access systems often use the 433 MHz band, although, as in all of Europe, these frequencies are within the 70-centimetre band allocated to amateur radio and interference occurs. In Germany, before the end of 2008, radio enthusiasts could use frequencies from channel 03 to channel 67 for radio control of any type of model (air or terrestrial), all with odd channel numbers (03, 05, etc.
up to Chapter 67), with each sanctioned frequency having a bandwidth separation of 50 kHz between each adjacent channel. Harmonised European standards covering aspects of the DTH spectrum are published by the European Telecommunications Standards Institute (ETSI). You can download individual standards for free from the ETSI website. Despite all these limitations, I run the 433MHz versions without any problems. Lora in the EU is mainly 868 MHz, so you should buy one of them. LPD433 (Low Power Device 433 MHz) is a UHF band in which unlicensed communication devices can operate in certain regions. The frequencies correspond to the ITU Region 1 ISM band from 433.050 MHz to 434.790 MHz, and operation is limited to CEPT countries. The frequencies used are in the 70-centimetre band currently reserved for government and amateur radio operations in the United States and most countries of the world. I have tested some tbeams with Meshtastic on 433 and 868, so far I have found that the SX1262 at 868mhz is much better than the 433 with the sx1276. Another thing to keep in mind: the transmission power can be very limited. At 433 MHz in Germany, you can only broadcast with an active power of 10 mW and 100% airtime, while at 868 MHz you can broadcast with 500 mW and 10% airtime (I think).
In addition to allocating spectrum, regulators have a role to play in ensuring that a transmitter used in one band does not interfere with the use of one transmitter in another. Such problems would make the use of radio impractical in many applications. The Conference of European Postal and Telecommunications Administrations (CEPT) carries out technical analyses and publishes recommendation reports and decisions aimed at harmonising the technical conditions for the use of DRS throughout Europe. Some of these activities are carried out at the invitation of the European Commission to contribute to the development of binding EU harmonisation decisions. They can also assist ETSI in the development of equipment standards.
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