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Studies by the National Telecommunications and Information Administration (NTIA) show that the probability of interference from a BPL system operating at the FCC radiated emission limit on the same frequency as a typical two-way radio station is essentially 100% 200 to 400 meters from the power line, depending on the frequency. The interference did not cease until the test was terminated prematurely.
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In one case in Cedar Rapids, Iowa, BPL engineers spent 12 weeks trying to solve an interference problem without success. However, in practice it is often difficult to resolve such interference problems in the field. The Communications Act of 1934 and the FCC Rules have long required that unlicensed emitters such as BPL systems must protect licensed radio services from interference, and that they must accept any interference to their operation that is the result of normal activity by licensed radio services. Administrative appeals of the rules have been filed and court challenges are likely. However, the new rules are not sufficient to reduce the probability of harmful interference to reasonable levels. These rules place new restrictions on BPL systems in recognition of the fact that they pose a greater threat of radio interference than most Part 15 devices, such as garage door openers. In October 2004 the Federal Communications Commission (FCC) adopted new rules for BPL systems. Despite the very limited deployment, considerable interference has been documented. So far, BPL has been deployed in numerous temporary test sites but in few commercial installations. BPL is not entitled to protection from interference. FCC rules require that BPL systems may only operate subject to the express condition that harmful interference is not caused to licensed radio services. At least, better from yesterday.įrom a regulatory standpoint, BPL is an unlicensed, unintentional emitter of RF energy and is subject to FCC Part 15 rules. If this can make a change, it is my pleasure for you to share your testimonial or comments.
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I'm not offering solution but only a recommendation. Last option - buy a new mobile rig except ICOM 2200H.Battery performance voltage checking e.g monthly or weekly.voltage stabilizer - provide sufficient voltage and current supply.By re-filling battery water and ensure battery is running well and supply enough current to rig, it will definitely may provide sufficient current supply to rig.It does happens when a supply current to rig insufficient and failed to distribute stable current flow to MIC (max 10mA).It is true that this type of transceiver has been tested but why the complaints keep increasing not declining. A supply voltage from battery is sometime fluctuated depending on battery performance. For Yaesu FT8800, its only need 5vdc to operate compared with ICOM 2200H which need at least 8Vdc to operate. Based on my personal experiences and secondary informations from friends & radio forums, it is not because of the PTT problems as what an ordinary people thought but technically because of power supplied to Microphone.Re-fill battery water - no problem encountered until today.Change to another mic - problem persist.Battery NS70 Fluid Type ( 1-2 year old).Battery NS40 Fluid Type ( 2 years old ).During QSO, when it happens, the other station will wait for a while waiting for your Tx but received no signal and audio at all.įindings and observations based on setup station: No signs of Tx power appeared when triggering PTT.
DOA SELAMAT PERJALANAN PERGI DAN BALIK PLUS
Wonderful rig and performance plus the cheapest price in open market. Transceiver set : ICOM 2200H (mobile rig)