Edn Cover-story Aug 20 2009 - Cal-lab's Cto's Observations
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CAL-LAB Inventor’s Observations on a coverstory in EDN-magazine (Aug 20 2009)
Link: http://www.edn.com/article/CA6676165.html#Revisiting_power_line Quote:
Date: Aug 21 2009 by Paul Chang It was an email exchange that led to CAL-LAB sending 5 units of PLC-CLLI (4X MD-PLC-3 & 1X MD-PLC-1) to The Senior Technical Editor of EDN for testing – when he said (to the effect) “If your product functions as you have claimed, I will use it in my August cover-story!”
Revisiting power line I have so far been unable to dispense with HomePlug AV in my LAN, so I’ve spent some time determining whether I could improve the technology’s robustness. In a sense, the power-line approach has an inherent advantage: The adapters can directly transfer data
I am pleased to see a picture he later asked for and the web-site of CAL-LAB appearing among industry big-guns. Indeed, he has used PLC-CLLI in the coverstory! My thanks to Brian Dipert! However, the fact that he has not expressed or indicated the ‘WOW!’ factor that I had expected him to also find – as those who came to our KL-PJ showroom to put our claims to the test had found, got me wondering if PLC-CLLI (CAL-LAB’s PLC-Booster-Isolators) had been fully and correctly exploited. See below: 1. Whether all PCs, Servers and Network devices (whose built-in switching power supplies and EMI-filters adversely affect the performance of PLC-adapters) had ALL obtained power via the filtered outlets of the PLC-CLLI at the setup during tests; 2. Whether ALL PLC-adapters in use or connected were appropriately connected via the un-attenuated outlets of PLC-CLLI – and ALL interconnected equipment were powered via the filtered outlets of the same PLC-CLLI. 3. Whether any other devices or equipment were plugged into the other wall-outlets near the one where a PLC-CLLI was added – as full advantages of PLC-CLLI would only be obtained when all nearby equipment (noise-generating or not) were powered via the PLC-CLLI. I respect Brian’s vast experiences and knowledge and by no means am I questioning his capabilities BUT simply wish to confirm if he had thought it necessary to do as such! I am confident that the following advantages should still be viable, when PLCCLLI is widely & correctly employed: 1. A 2~5 folds improvement on connection-rate – depending on how elaborately and widely PLC-CLLI has been necessarily employed! 2. Low-cost & effective solutions to ALL Inherent-problems currently stifling the rightful growth of Powerline Home Network (HAN) 3. The PLC-adapter and ALL interconnected equipment can be protected effectively from lightning & surges! …………………………………………………………………………………… Here are some quotes from the EDN Cover Story, Aug-20 2009 – in which CALLAB Powerline Communications Booster was mentioned.
between them over the power grid with minimal router interaction. However, surge protectors and noise filters are equal parts curses and blessings for power-line networking. You can’t plug an Ethernet-to-power-line adapter into them because the filter circuitry siphons off the networking data stream that’s multiplexed on the ac-waveform carrier signal. Their omission from power-grid noise sources is equally debilitating to the powerline network, however.
Some signal attenuators are fairly obvious, notably motor-based products, such as stand-alone fans, heaters, air conditioners, refrigerators, vacuum cleaners, hair dryers, and the like. Other more obscure noise sources include the switching power supplies in ac/dc converters and battery chargers. Companies such as Cal-Lab sell specialized hardware that combines an unfiltered outlet for the power-line-networking adapter and a filtered connection, which also protects against lightning and other power surges, for noise-generating gear (Figure A). Similarly, Intellon recently sent me two PowerNet 200 HomePlug AV adapters that Monster Cable sells; the adapters integrate two filtered and protected power outlets Gigle Semiconductor recently partnered with Belkin to unveil Belkin’s F5D4076 gigabit power-line-networking adapters, which Gigle based on its GGL541 IC. The GGL541 supports both HomePlug AV, which operates in the 2- to 28-MHz band, and Gigle’s proprietary Mediaxtream technology, which uses the 50- to 300-MHz band. Like 5-GHz WiFi versus 2.4-GHz 802.11, Mediaxtream’s higher frequency delivers potentially higher
performance. Indicative of this promise, the F5D4076 includes a 1-GbE (gigabit-Ethernet)
Broadcom
Cal-Lab
Dell
transceiver, whereas consumer HomePlug AV adapters belie their "200-Mbps" marketing
www.broadcom.com
www.cal-lab.com
www.dell.com
claims by embedding only 10/100-Mbps PHY (physical-layer) interfaces.
D-Link
Gigle Semiconductor
Intellon
www.dlink.com
www.gigle.biz
www.intellon.com
usable range than does HomePlug AV. The initial production firmware in the Belkin
Linksys
Microsoft
Monster Cable Products
adapters selects either HomePlug AV or Mediaxtream mode, depending on the power-grid
www.linksysbycisco.com
www.microsoft.com
www.monstercable.com
Netgear
Roku
Sony
www.netgear.com
www.roku.com
www.sony.com
However, again as with 5-GHz versus 2.4-GHz wireless, Mediaxtream has notably shorter
characteristics that the ICs’ embedded DSPs determine at power-up. As you can see from the Network Performance Tuner plot, the adapters have selected HomePlug AV mode in my setup. In fact, they run slightly slower than my Netgear HomePlug AV-dedicated hardware, even at a two-node deficit. Gigle is working on firmware improvements, both to
Unquote
increase the number of supported nodes and to bond the HomePlug AV and Mediaxtream channels together rather than using a more elementary either-not-both approach.
(Figure A)
I am also wondering IF anything else could have been done to ensure that PLC-adapters WILL perform effectively and reliably so that the negative images that had been projected until now might be removed! To me, it is not IF ALL Inherent-problems can be over-come BUT rather WHEN will industry-leaders make the needed changes in attitude – by not launching PLC-adapters while knowing that what they claim are based on perfect Powerline-conditions, without first offering solutions! The fact is: There is no perfect powerline, without negative elements! The least they could do was to be honest and helpful – by acknowledging that Powerline conditions could be improved with the right technologies & devices including those from CAL-LAB! How about becoming a global partner with CAL-LAB to help launch my patent-pending PLC Booster-Isolators? But first, come and see for yourself the improvements we have achieved at our correctly installed setups! Thanks for your time, Paul Chang Inventor CAL-LAB August 21 2009
For More Information Apple
Atheros Communications
Belkin International
www.apple.com
www.atheros.com
www.belkin.com
Contact me: [email protected] More info: www.cal-lab.com
Link: http://www.edn.com/article/CA6676165.html#Revisiting_power_line Quote:
Date: Aug 21 2009 by Paul Chang It was an email exchange that led to CAL-LAB sending 5 units of PLC-CLLI (4X MD-PLC-3 & 1X MD-PLC-1) to The Senior Technical Editor of EDN for testing – when he said (to the effect) “If your product functions as you have claimed, I will use it in my August cover-story!”
Revisiting power line I have so far been unable to dispense with HomePlug AV in my LAN, so I’ve spent some time determining whether I could improve the technology’s robustness. In a sense, the power-line approach has an inherent advantage: The adapters can directly transfer data
I am pleased to see a picture he later asked for and the web-site of CAL-LAB appearing among industry big-guns. Indeed, he has used PLC-CLLI in the coverstory! My thanks to Brian Dipert! However, the fact that he has not expressed or indicated the ‘WOW!’ factor that I had expected him to also find – as those who came to our KL-PJ showroom to put our claims to the test had found, got me wondering if PLC-CLLI (CAL-LAB’s PLC-Booster-Isolators) had been fully and correctly exploited. See below: 1. Whether all PCs, Servers and Network devices (whose built-in switching power supplies and EMI-filters adversely affect the performance of PLC-adapters) had ALL obtained power via the filtered outlets of the PLC-CLLI at the setup during tests; 2. Whether ALL PLC-adapters in use or connected were appropriately connected via the un-attenuated outlets of PLC-CLLI – and ALL interconnected equipment were powered via the filtered outlets of the same PLC-CLLI. 3. Whether any other devices or equipment were plugged into the other wall-outlets near the one where a PLC-CLLI was added – as full advantages of PLC-CLLI would only be obtained when all nearby equipment (noise-generating or not) were powered via the PLC-CLLI. I respect Brian’s vast experiences and knowledge and by no means am I questioning his capabilities BUT simply wish to confirm if he had thought it necessary to do as such! I am confident that the following advantages should still be viable, when PLCCLLI is widely & correctly employed: 1. A 2~5 folds improvement on connection-rate – depending on how elaborately and widely PLC-CLLI has been necessarily employed! 2. Low-cost & effective solutions to ALL Inherent-problems currently stifling the rightful growth of Powerline Home Network (HAN) 3. The PLC-adapter and ALL interconnected equipment can be protected effectively from lightning & surges! …………………………………………………………………………………… Here are some quotes from the EDN Cover Story, Aug-20 2009 – in which CALLAB Powerline Communications Booster was mentioned.
between them over the power grid with minimal router interaction. However, surge protectors and noise filters are equal parts curses and blessings for power-line networking. You can’t plug an Ethernet-to-power-line adapter into them because the filter circuitry siphons off the networking data stream that’s multiplexed on the ac-waveform carrier signal. Their omission from power-grid noise sources is equally debilitating to the powerline network, however.
Some signal attenuators are fairly obvious, notably motor-based products, such as stand-alone fans, heaters, air conditioners, refrigerators, vacuum cleaners, hair dryers, and the like. Other more obscure noise sources include the switching power supplies in ac/dc converters and battery chargers. Companies such as Cal-Lab sell specialized hardware that combines an unfiltered outlet for the power-line-networking adapter and a filtered connection, which also protects against lightning and other power surges, for noise-generating gear (Figure A). Similarly, Intellon recently sent me two PowerNet 200 HomePlug AV adapters that Monster Cable sells; the adapters integrate two filtered and protected power outlets Gigle Semiconductor recently partnered with Belkin to unveil Belkin’s F5D4076 gigabit power-line-networking adapters, which Gigle based on its GGL541 IC. The GGL541 supports both HomePlug AV, which operates in the 2- to 28-MHz band, and Gigle’s proprietary Mediaxtream technology, which uses the 50- to 300-MHz band. Like 5-GHz WiFi versus 2.4-GHz 802.11, Mediaxtream’s higher frequency delivers potentially higher
performance. Indicative of this promise, the F5D4076 includes a 1-GbE (gigabit-Ethernet)
Broadcom
Cal-Lab
Dell
transceiver, whereas consumer HomePlug AV adapters belie their "200-Mbps" marketing
www.broadcom.com
www.cal-lab.com
www.dell.com
claims by embedding only 10/100-Mbps PHY (physical-layer) interfaces.
D-Link
Gigle Semiconductor
Intellon
www.dlink.com
www.gigle.biz
www.intellon.com
usable range than does HomePlug AV. The initial production firmware in the Belkin
Linksys
Microsoft
Monster Cable Products
adapters selects either HomePlug AV or Mediaxtream mode, depending on the power-grid
www.linksysbycisco.com
www.microsoft.com
www.monstercable.com
Netgear
Roku
Sony
www.netgear.com
www.roku.com
www.sony.com
However, again as with 5-GHz versus 2.4-GHz wireless, Mediaxtream has notably shorter
characteristics that the ICs’ embedded DSPs determine at power-up. As you can see from the Network Performance Tuner plot, the adapters have selected HomePlug AV mode in my setup. In fact, they run slightly slower than my Netgear HomePlug AV-dedicated hardware, even at a two-node deficit. Gigle is working on firmware improvements, both to
Unquote
increase the number of supported nodes and to bond the HomePlug AV and Mediaxtream channels together rather than using a more elementary either-not-both approach.
(Figure A)
I am also wondering IF anything else could have been done to ensure that PLC-adapters WILL perform effectively and reliably so that the negative images that had been projected until now might be removed! To me, it is not IF ALL Inherent-problems can be over-come BUT rather WHEN will industry-leaders make the needed changes in attitude – by not launching PLC-adapters while knowing that what they claim are based on perfect Powerline-conditions, without first offering solutions! The fact is: There is no perfect powerline, without negative elements! The least they could do was to be honest and helpful – by acknowledging that Powerline conditions could be improved with the right technologies & devices including those from CAL-LAB! How about becoming a global partner with CAL-LAB to help launch my patent-pending PLC Booster-Isolators? But first, come and see for yourself the improvements we have achieved at our correctly installed setups! Thanks for your time, Paul Chang Inventor CAL-LAB August 21 2009
For More Information Apple
Atheros Communications
Belkin International
www.apple.com
www.atheros.com
www.belkin.com
Contact me: [email protected] More info: www.cal-lab.com
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