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Bought cool new digital charger....$89? WalMart?!!
"Larry W4CSC" wrote in message
... On Thu, 29 Jan 2004 09:09:44 -0600, "Del Cecchi" wrote: At the least it has to be class A. And I bet pleasure boats would be construed as class B. del cecchi If so, Adler-Barbour solid state fridge will never pass. Just listen to the pulses on Marine VHF Channel 16....dammit.... Not to mention your 'favorite' Noland multiplexer.... They even admitted to me once, that they did not have any kind of approval (FCC, CE) Meindert |
Bought cool new digital charger....$89? WalMart?!!
On Fri, 30 Jan 2004 08:07:43 +0100, "Meindert Sprang"
wrote: "Larry W4CSC" wrote in message ... On Thu, 29 Jan 2004 09:09:44 -0600, "Del Cecchi" wrote: At the least it has to be class A. And I bet pleasure boats would be construed as class B. del cecchi If so, Adler-Barbour solid state fridge will never pass. Just listen to the pulses on Marine VHF Channel 16....dammit.... Not to mention your 'favorite' Noland multiplexer.... They even admitted to me once, that they did not have any kind of approval (FCC, CE) Meindert There's a source of information, guys. Meindert, what are the FCC radiation requirements for this boat electronics? Are these items required to pass FCC's consumer radiation requirements? Is Norland violating the law? My contention is marine electronics isn't covered, otherwise we'd have a data system that's shielded, not the stupid NMEA-0183 with unshielded connections screwed down helter-skelter balanced and unbalanced any old way you builders want to do it with wires hanging out, radiating like hell. Is this the TRUTH? Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... |
Bought cool new digital charger....$89? WalMart?!!
On Fri, 30 Jan 2004 08:07:43 +0100, "Meindert Sprang"
wrote: "Larry W4CSC" wrote in message ... On Thu, 29 Jan 2004 09:09:44 -0600, "Del Cecchi" wrote: At the least it has to be class A. And I bet pleasure boats would be construed as class B. del cecchi If so, Adler-Barbour solid state fridge will never pass. Just listen to the pulses on Marine VHF Channel 16....dammit.... Not to mention your 'favorite' Noland multiplexer.... They even admitted to me once, that they did not have any kind of approval (FCC, CE) Meindert There's a source of information, guys. Meindert, what are the FCC radiation requirements for this boat electronics? Are these items required to pass FCC's consumer radiation requirements? Is Norland violating the law? My contention is marine electronics isn't covered, otherwise we'd have a data system that's shielded, not the stupid NMEA-0183 with unshielded connections screwed down helter-skelter balanced and unbalanced any old way you builders want to do it with wires hanging out, radiating like hell. Is this the TRUTH? Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... |
Bought cool new digital charger....$89? WalMart?!!
"Larry W4CSC" wrote in message
... There's a source of information, guys. Meindert, what are the FCC radiation requirements for this boat electronics? Are these items required to pass FCC's consumer radiation requirements? Is Norland violating the law? My contention is marine electronics isn't covered, otherwise we'd have a data system that's shielded, not the stupid NMEA-0183 with unshielded connections screwed down helter-skelter balanced and unbalanced any old way you builders want to do it with wires hanging out, radiating like hell. Is this the TRUTH? According to FCC Part 15, a class B digital device is: ---QQQ--- A digital device that is marketed for use in a residential environment notwithstanding use in commercial, business and industrial environments. Examples of such devices include, but are not limited to, personal computers, calculators, and similar electronic devices that are marketed for use by the general public. Note: The responsible party may also qualify a device intended to be marketed in a commercial, business or industrial environment as a Class B device, and in fact is encouraged to do so, provided the device complies with the technical specifications for a Class B digital device. In the event that a particular type of device has been found to repeatedly cause harmful interference to radio communications, the Commission may classify such a digital device as a Class B digital device, regardless of its intended use. ---UQUQ--- Navigation electronics fall in the category of "digital devices marketed for use by the general public". For professional use, there are even more stringent standards (IEC945). And it is my understanding that FCC approval or compliance is mandatory. When I export to the US and ship with Fedex, they ant me to fill out a form, stating that the my multiplexers comply with FCC Part 15 class B. Otherwise they (Fedex, being the importer) can be held liable. So you might think Noland is violating the law here. They are for sure with the units they export to Europe, because they have no CE marking. The limits for radiated emmission for class B devices a 30 - 88MHz: 100uV/m 88 - 216MHz: 150uV/m 216 - 960MHz: 200uV/m Above 960MHz: 500uV/m All measured at 3 meters distance. Meindert |
Bought cool new digital charger....$89? WalMart?!!
"Larry W4CSC" wrote in message
... There's a source of information, guys. Meindert, what are the FCC radiation requirements for this boat electronics? Are these items required to pass FCC's consumer radiation requirements? Is Norland violating the law? My contention is marine electronics isn't covered, otherwise we'd have a data system that's shielded, not the stupid NMEA-0183 with unshielded connections screwed down helter-skelter balanced and unbalanced any old way you builders want to do it with wires hanging out, radiating like hell. Is this the TRUTH? According to FCC Part 15, a class B digital device is: ---QQQ--- A digital device that is marketed for use in a residential environment notwithstanding use in commercial, business and industrial environments. Examples of such devices include, but are not limited to, personal computers, calculators, and similar electronic devices that are marketed for use by the general public. Note: The responsible party may also qualify a device intended to be marketed in a commercial, business or industrial environment as a Class B device, and in fact is encouraged to do so, provided the device complies with the technical specifications for a Class B digital device. In the event that a particular type of device has been found to repeatedly cause harmful interference to radio communications, the Commission may classify such a digital device as a Class B digital device, regardless of its intended use. ---UQUQ--- Navigation electronics fall in the category of "digital devices marketed for use by the general public". For professional use, there are even more stringent standards (IEC945). And it is my understanding that FCC approval or compliance is mandatory. When I export to the US and ship with Fedex, they ant me to fill out a form, stating that the my multiplexers comply with FCC Part 15 class B. Otherwise they (Fedex, being the importer) can be held liable. So you might think Noland is violating the law here. They are for sure with the units they export to Europe, because they have no CE marking. The limits for radiated emmission for class B devices a 30 - 88MHz: 100uV/m 88 - 216MHz: 150uV/m 216 - 960MHz: 200uV/m Above 960MHz: 500uV/m All measured at 3 meters distance. Meindert |
Bought cool new digital charger....$89? WalMart?!!
On Fri, 30 Jan 2004 15:30:30 +0100, "Meindert Sprang"
wrote: The limits for radiated emmission for class B devices a 30 - 88MHz: 100uV/m 88 - 216MHz: 150uV/m 216 - 960MHz: 200uV/m Above 960MHz: 500uV/m All measured at 3 meters distance. Meindert Thanks, but the keywords I see are RESIDENTIAL. They are "encouraged", but not "required" to do so in an industrial environment, same as computers. Also of interest if the 30 Mhz lower limit in the above table. It doesn't say 0-88 Mhz. The most important 30 Mhz is missing....for the HF SSB radios. Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... |
Bought cool new digital charger....$89? WalMart?!!
On Fri, 30 Jan 2004 15:30:30 +0100, "Meindert Sprang"
wrote: The limits for radiated emmission for class B devices a 30 - 88MHz: 100uV/m 88 - 216MHz: 150uV/m 216 - 960MHz: 200uV/m Above 960MHz: 500uV/m All measured at 3 meters distance. Meindert Thanks, but the keywords I see are RESIDENTIAL. They are "encouraged", but not "required" to do so in an industrial environment, same as computers. Also of interest if the 30 Mhz lower limit in the above table. It doesn't say 0-88 Mhz. The most important 30 Mhz is missing....for the HF SSB radios. Larry W4CSC No, no, Scotty! I said, "Beam me a wrench.", not a WENCH! Kirk Out..... |
Bought cool new digital charger....$89? WalMart?!!
"Larry W4CSC" wrote in message
... On Fri, 30 Jan 2004 15:30:30 +0100, "Meindert Sprang" wrote: Thanks, but the keywords I see are RESIDENTIAL. They are "encouraged", but not "required" to do so in an industrial environment, same as computers. What is meant here is that for industrial environment, Class A is sufficient, (which accepts a higher level of interference), bu they arecouraged to qualify for Class B. Also of interest if the 30 Mhz lower limit in the above table. It doesn't say 0-88 Mhz. The most important 30 Mhz is missing....for the HF SSB radios. The figures I qouted were for radiated emission, which is hardly present on lower frequencies. Below 30MHz, conducted emission is more the problem. This is emission through connected wires and is measured with a current probe setup. Meindert |
Bought cool new digital charger....$89? WalMart?!!
"Larry W4CSC" wrote in message
... On Fri, 30 Jan 2004 15:30:30 +0100, "Meindert Sprang" wrote: Thanks, but the keywords I see are RESIDENTIAL. They are "encouraged", but not "required" to do so in an industrial environment, same as computers. What is meant here is that for industrial environment, Class A is sufficient, (which accepts a higher level of interference), bu they arecouraged to qualify for Class B. Also of interest if the 30 Mhz lower limit in the above table. It doesn't say 0-88 Mhz. The most important 30 Mhz is missing....for the HF SSB radios. The figures I qouted were for radiated emission, which is hardly present on lower frequencies. Below 30MHz, conducted emission is more the problem. This is emission through connected wires and is measured with a current probe setup. Meindert |
Bought cool new digital charger....$89? WalMart?!!
"Meindert Sprang" wrote in message
... "Larry W4CSC" wrote in message ... On Fri, 30 Jan 2004 15:30:30 +0100, "Meindert Sprang" wrote: Thanks, but the keywords I see are RESIDENTIAL. They are "encouraged", but not "required" to do so in an industrial environment, same as computers. In section 15.103 sub (a) it says that devices operating exclusively in any transportation vehicle (including motor vehicles and aircraft) are exempted. Now according to my dictionary, a vehicle usually has wheel and mover over land. What about boats? Meindert |
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