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Dbm to watts4/16/2023 Vp-p = 63.236 Volts Power to Vrms, Vpeak, Vp-p conversion formula or equationįollowing equations or formula are used for Power to Vrms/Vpeak/Vp-p conversion.Ĭalculator#2: Power (Watt) to Power (dBm) Conversionįollowing calculator converts Power in Watts to Power in dBm. Hence for Power in watt to Power in dBm conversion use calculator#2. It mentions Power in watt to Power in dBm conversion as it takes PdBm as input to generate outputs (Vrms, Vpeak, Vp-p) in volts.Ĭalculator#1: Power to Vrms, Vpeak, Vp-p conversionįollowing calculator requires power in dBm. This page mentions Power to Vrms, Vpeak, Vp-p conversion calculator. The author of this document, Dave Anderson is a licensed amateur radio operator (KG4YZY) and is on the ARRL HSMM Working group and a founding member of ARBA, the Amateur Radio Broadband Alliance.Power to Vrms,Vpeak,Vp-p conversion calculator This group is producing proposed rule making changes to be submitted to the FCC that would make operating simpler and allow more reasonable usage of for example encryption. The HSMM group only deals with working on high speed data via Amateur radio. It's highly suggested for Amateurs visit the ARRL website and participate in the HSMM (high speed multimedia) working group. Only authorized licensed operators should be able to access Part 97 installed hardware, so care should be taken to prevent unauthorized users from utilizing said hardware. * You must enable broadcasting of your SSID, which has to include your callsign. * Maximum Transmitter Power Output (TPO) is 100 watt or 50dBm. * In the 13cm band, 802.11b/g channels 1 thru 6 are the only channels in the 2390-2450 MHz bandplan. * Frequencies usable from over-the-counter consumer gear include the 33cm 902-928 MHz band, the 13cm 2390-2450 MHz band and the 5cm 5650-5925Mhz band. * Users operate under FCC Part 97 rules and regulations. If you are not a professional installer we highly recommend that you read the FCC Part 15 rules and understand them before attempting installations.Īmateur Radio Operators operating under licensed spectrum: This information is provided as a guideline. Maximum transmitter power versus largest antenna table for PTP: Systems operating in a point-to-point operation may employ transmitting antennas with directional gain greater than 6 dBi provided the maximum output power of the transmitter is reduced by 1 dB for every 3 dB that the directional gain of the antenna that exceeds 6 dBi. Higher EIRP is allowed if the antennas are directional in nature. An example here would be say a 30dBm 1 watt amplifier with 100ft of LMR400 (at 6.7dB of loss) brings transmitter power down to 23.3dBm, allowing a 12dBi antenna. Losses from the transmitter via cabling, lightning suppression, filtration can be removed from the transmitted power dBm figure. Maximum transmitter power versus largest antenna table for PTMP: The maximum EIRP power allowed is 36dBm (4 watts). Each of these modes have different EIRP (Effective Isotropic Radiated Power) limitations. PTMP is when many sites talk to a single core site. PTP is when two sites talk only to themselves. You'll commonly hear these modes referred to as Point to Point (PTP) and Point to Multi-point (PTMP). ![]() There are two different classifications for operation. * The formula for converting antennas from dBi to dBd is dBi-2.2=dBd. * Maximum Transmitter Power Output (TPO) is 1.0 watt or 30dBm. * Users o perate under FCC Part 15 rules and regulations. ![]() ![]() Usage and Maximum Power Limit Guidelines in the US under FCC regulations:īefore we can go on, first we need to separate the two different classes of users for Spread Spectrum devices that exist and set some guidelines of some of the specs.Ĭonsumers and IT Professionals Operating Spread Spectrum (DSSS) gear:
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