Fwd:1-10GHz source
Forwarded for Marvin Reply Separator Subject:1-10GHz source Author: Wolak; Marvin marvin.wo...@marconi.com List-Post: emc-pstc@listserv.ieee.org Date: 6/7/00 2:47 PM A few weeks ago, there was some interest about references sources above 1 GHz. A few months ago I got tired of trying to find a source and made one myself. After some experimentation with batteries, I came up with a source which emits from 250 MHz through 10 GHz. The source emits the harmonics of 250 MHz. The source is stable to about 0.3 dB over the charge of the batteries which is from 12 to 22 hours depending on how they were charged. The field produced by the source, as tested at 3 m, is from approximately 68 dBuV/m to 85 dBuV/m in the range of 1 to 10 GHz. If anyone would like to see plots or stability graphs, let me know. If the response is overwhelming, I'll post it. Basically, what I came up with is as follows: The box is a simple aluminum project box, a circuit described below, 8 NiMh batteries (rechargeable), and a built in charger. The circuit was put together on a circuit board using a Radio Shack etch kit. A 250 MHz oscillator feeds directly into a Herotek 250 MHz comb generator. The output of the comb generator is put through a 10 dB attenuator and then connected to a sma bulkhead connector using a short coax jumper cable. The antenna is a sma m-f barrel with a wire attached to the center conductor. A case from a ballpoint pen was screwed onto the barrel to protect the wire. I tapped out the end of the pen case so the connector would screw on. Can't remember the manufacturer of the oscillator. The comb generator from herotek, (http://www.herotek.com/), has removable sma connectors on the input and output. I removed the input sma and connected it directly to the oscillator output. All in all, the circuit draws 173 mA. The power for the above is regulated by a 5V regulator with some simple power decoupling and diode protection. The first pass used AA alkaline batteries. This provided for only about 6 hours of operation. The second pass was with 6 C rechargeable alkaline batteries. This provided for about 14 hours of operation but the source stability was poor. The output at some frequencies would increase 2-4 dB over the life of the charge. Another drawback was that the batteries had to be removed to charge. I've since replaced the alkaline batteries with 8 Panasonic NiMh batteries. This has solved my stability problem (I can live with 0.3 dB variability). To charge the batteries a bought a MaHa battery charger, disassembled it, and mounted its circuitry in my box. The switchover from the load of the circuit to the charger is done through the main double pole-double throw switch. If I had to do it over, I would start from the power side. The NiMh batteries are not the best choice for a few good reasons but that was what I was stuck with if I was to keep the same box. Lead acid may be a better choice, but would require a larger project box, something like the popular EMCO Royce field source. I would be interested in feedback. There is plenty of room for improvement, and lots of talent on this board. If you have any questions, or if something is unclear, let me know. Marvin Wolak Marconi Communications Senior EMC Engineer, Product Integrity Ph: 724-742-7453 Fx: 724-742-7474 EMail: marvin.wo...@marconi.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: EMC Symposia CD of 1955 to 1995
Jim and David, Yes! the re-setup works. Thank you very much. Barry -- On Wed, 07 June 2000, david_ster...@ademco.com wrote: We were unable to print after upgrading from Win95 to Win98. Changing printer options, changing pritners both were futile. A re-install solved the problem. David Sterner, ADEMCO __ Reply Separator _ Subject: RE: EMC Symposia CD of 1955 to 1995 Author: Knighten; Jim L SMTP:jk100...@exchange.sandiegoca.ncr.com at ADEMCONET Date:6/7/2000 1:10 PM Barry, I AM able to print papers from the EMC Symposia Records CDs 1955-1995 (40 years for $40), although it is a bit tricky. The program is a bit clunky by today's standards. I had difficulty printing the paper and not all the abstracts recovered in a query. It took reading the instructions that came with the CD set to print the paper, itself. Perhaps you need to re-install the program on your computer? Jim Dr. Jim Knighten e-mail: jim.knigh...@ncr.com jim.knigh...@ncr.com Technical Consultant - Design NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com http://www.ncr.com Tel: 858-485-2537 Fax: 858-485-3788 -Original Message- From: Barry Ma [mailto:barry...@altavista.com] Sent: Wednesday, June 07, 2000 9:09 AM To: EMC-PSTC Subject: EMC Symposia CD of 1955 to 1995 Hi list members, I have difficulty to print EMC Symposia CD of 1955 to 1995 that I bought for $40. I have no problem to read them on my PC screen. But when following the instruction to print them from my PC, I can only get blank paper. Do you have the same problem? Thanks. Regards, Barry Ma m...@anritsu.com ___ Why pay when you don't have to? Get AltaVista Free Internet Access now! http://jump.altavista.com/freeaccess4.go ___ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: 1-10GHz source
Marvin, This is excellent! This is exactly the sort of item that makes life easier for us. Please post as much information as possible, if you would not mind. I agree that a lead-acid cell would work best in this application. I would suggest a 6-volt unit used with a low-dropout 5-volt regulator. I would keep the charger separate for ease of use. A 6.9 volt supply could float charge the battery for long periods of time without damage. An LM7805 5-volt regulator boosted via resistors would work, as would an LM317 with appropriate resistors. I would use a switched dc jack for the charger input. These disconnect the battery from the load when the (dc)plug is inserted. 5.5 by 2.5 mm is one of the more common sizes in use. Scott Lacey Contract Engineer (EMC, Safety, Product Development) sco...@world.std.com (I have transferred my address for the emc-pstc to my personal email address after leaving Foxboro - my network account is not yet set up at my new assignment - the usual low priority with the I.S. people) -Original Message- From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org]On Behalf Of Jim Bacher Sent: Wednesday, June 07, 2000 7:37 PM To: Wolak; Marvin; emc-p...@ieee.org Subject: Fwd:1-10GHz source Forwarded for Marvin Reply Separator Subject:1-10GHz source Author: Wolak; Marvin marvin.wo...@marconi.com List-Post: emc-pstc@listserv.ieee.org Date: 6/7/00 2:47 PM A few weeks ago, there was some interest about references sources above 1 GHz. A few months ago I got tired of trying to find a source and made one myself. After some experimentation with batteries, I came up with a source which emits from 250 MHz through 10 GHz. The source emits the harmonics of 250 MHz. The source is stable to about 0.3 dB over the charge of the batteries which is from 12 to 22 hours depending on how they were charged. The field produced by the source, as tested at 3 m, is from approximately 68 dBuV/m to 85 dBuV/m in the range of 1 to 10 GHz. If anyone would like to see plots or stability graphs, let me know. If the response is overwhelming, I'll post it. Basically, what I came up with is as follows: The box is a simple aluminum project box, a circuit described below, 8 NiMh batteries (rechargeable), and a built in charger. The circuit was put together on a circuit board using a Radio Shack etch kit. A 250 MHz oscillator feeds directly into a Herotek 250 MHz comb generator. The output of the comb generator is put through a 10 dB attenuator and then connected to a sma bulkhead connector using a short coax jumper cable. The antenna is a sma m-f barrel with a wire attached to the center conductor. A case from a ballpoint pen was screwed onto the barrel to protect the wire. I tapped out the end of the pen case so the connector would screw on. Can't remember the manufacturer of the oscillator. The comb generator from herotek, (http://www.herotek.com/), has removable sma connectors on the input and output. I removed the input sma and connected it directly to the oscillator output. All in all, the circuit draws 173 mA. The power for the above is regulated by a 5V regulator with some simple power decoupling and diode protection. The first pass used AA alkaline batteries. This provided for only about 6 hours of operation. The second pass was with 6 C rechargeable alkaline batteries. This provided for about 14 hours of operation but the source stability was poor. The output at some frequencies would increase 2-4 dB over the life of the charge. Another drawback was that the batteries had to be removed to charge. I've since replaced the alkaline batteries with 8 Panasonic NiMh batteries. This has solved my stability problem (I can live with 0.3 dB variability). To charge the batteries a bought a MaHa battery charger, disassembled it, and mounted its circuitry in my box. The switchover from the load of the circuit to the charger is done through the main double pole-double throw switch. If I had to do it over, I would start from the power side. The NiMh batteries are not the best choice for a few good reasons but that was what I was stuck with if I was to keep the same box. Lead acid may be a better choice, but would require a larger project box, something like the popular EMCO Royce field source. I would be interested in feedback. There is plenty of room for improvement, and lots of talent on this board. If you have any questions, or if something is unclear, let me know. Marvin Wolak Marconi Communications Senior EMC Engineer, Product Integrity Ph: 724-742-7453 Fx: 724-742-7474 EMail: marvin.wo...@marconi.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim
Documentation required by EN 50081-2
EMC Group, How seriously does one need to take Para 7.1 of EN 50081-2 which says: The apparatus shall be supplied with a written warning indicating that the apparatus shall not be used in the residential, commercial and light-industrial environment unless the apparatus also conforms to the relevant standard [EN 50081-1]? Dan Kinney dan.kin...@heapg.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: EMC Symposia CD of 1955 to 1995
We were unable to print after upgrading from Win95 to Win98. Changing printer options, changing pritners both were futile. A re-install solved the problem. David Sterner, ADEMCO __ Reply Separator _ Subject: RE: EMC Symposia CD of 1955 to 1995 Author: Knighten; Jim L SMTP:jk100...@exchange.sandiegoca.ncr.com at ADEMCONET List-Post: emc-pstc@listserv.ieee.org Date:6/7/2000 1:10 PM Barry, I AM able to print papers from the EMC Symposia Records CDs 1955-1995 (40 years for $40), although it is a bit tricky. The program is a bit clunky by today's standards. I had difficulty printing the paper and not all the abstracts recovered in a query. It took reading the instructions that came with the CD set to print the paper, itself. Perhaps you need to re-install the program on your computer? Jim Dr. Jim Knighten e-mail: jim.knigh...@ncr.com jim.knigh...@ncr.com Technical Consultant - Design NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com http://www.ncr.com Tel: 858-485-2537 Fax: 858-485-3788 -Original Message- From: Barry Ma [mailto:barry...@altavista.com] Sent: Wednesday, June 07, 2000 9:09 AM To: EMC-PSTC Subject: EMC Symposia CD of 1955 to 1995 Hi list members, I have difficulty to print EMC Symposia CD of 1955 to 1995 that I bought for $40. I have no problem to read them on my PC screen. But when following the instruction to print them from my PC, I can only get blank paper. Do you have the same problem? Thanks. Regards, Barry Ma m...@anritsu.com ___ Why pay when you don't have to? Get AltaVista Free Internet Access now! http://jump.altavista.com/freeaccess4.go ___ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
CCTV Testing
Has anyone performed immunity testing on BW cameras? Kind regards, Don Umbdenstock Sensormatic --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: EFT/Burst
Paolo, EN55024 does not directly address the issue, rather it refers you to EN 61000-4-4. Clause 7.3.1 states . . . applied between a reference ground plane and each of the power supply terminals . . .. The key is each instead of all. From a purely regulatory perspective, it appears you have a valid point the way I read the standard. Other standards do indicate true common mode as a requirement. By the way, the reference ground may be at a different potential than protective earth. That's why a number of test sets have a test mode to test EFT between PE and ground reference. Check out the bonding and set up requirements carefully. However, a weakness in the design has been detected in true common mode test mode. Are you confident that your customer will not be bothered by the design weakness, whatever those manifestations are? Of course that is a quality issue, not a regulatory issue. Good luck, Don Umbdenstock -- From: Roncone Paolo[SMTP:paolo.ronc...@compuprint.it] Reply To: Roncone Paolo Sent: Wednesday, June 07, 2000 11:45 AM To: 'emc-p...@ieee.org' Subject: EFT/Burst Group, we are currently discussing with one OEM the interpretation of EFT/Burst test requirements per EN55024 and EN61000-4-4 to a printer. Specifically we are discussing the requirements of application of bursts to AC power lines. Our understanding is that they must be applied between each (single) power supply conductor and reference ground (or protective earth), as specified in EN61000-4-4 section 7.3.1. Also fig.4 and fig.11 in the same document seem to confirm this. Our OEM customer says that all combinations of phase, neutral and protective earth should be tested. They actually tested both singular AC lines and also more than one AC line. The printer passed the test in the first mode and failed in the second mode. Any comments / interpretations would be highly appreciated. Paolo Roncone Compuprint s.p.a. Italy --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: EMC Symposia CD of 1955 to 1995
Barry, I AM able to print papers from the EMC Symposia Records CDs 1955-1995 (40 years for $40), although it is a bit tricky. The program is a bit clunky by today's standards. I had difficulty printing the paper and not all the abstracts recovered in a query. It took reading the instructions that came with the CD set to print the paper, itself. Perhaps you need to re-install the program on your computer? Jim Dr. Jim Knightene-mail: jim.knigh...@ncr.com jim.knigh...@ncr.com Technical Consultant - Design NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com http://www.ncr.com Tel: 858-485-2537 Fax: 858-485-3788 -Original Message- From: Barry Ma [mailto:barry...@altavista.com] Sent: Wednesday, June 07, 2000 9:09 AM To: EMC-PSTC Subject:EMC Symposia CD of 1955 to 1995 Hi list members, I have difficulty to print EMC Symposia CD of 1955 to 1995 that I bought for $40. I have no problem to read them on my PC screen. But when following the instruction to print them from my PC, I can only get blank paper. Do you have the same problem? Thanks. Regards, Barry Ma m...@anritsu.com ___ Why pay when you don't have to? Get AltaVista Free Internet Access now! http://jump.altavista.com/freeaccess4.go ___ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
EMC Symposia CD of 1955 to 1995
Hi list members, I have difficulty to print EMC Symposia CD of 1955 to 1995 that I bought for $40. I have no problem to read them on my PC screen. But when following the instruction to print them from my PC, I can only get blank paper. Do you have the same problem? Thanks. Regards, Barry Ma m...@anritsu.com ___ Why pay when you don't have to? Get AltaVista Free Internet Access now! http://jump.altavista.com/freeaccess4.go ___ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: High voltage testing and altitude correction factor
Hi Rich. The exception being Table G.2 of IEC60950, 3rd ed. Table G.2 clearly states its applicability up to 2km, when using Annex G and its Alternative method for determining minimum clearances. Peter L. Tarver, PE ptar...@nortelnetworks.com From: Rich Nute [mailto:ri...@sdd.hp.com] Hi Doug: IEC 60950 differs from IEC 60664 in that the clearances are for sea level, not 2000 meters. See Table 18, Note 2. Since 664 is the reference standard, I suppose one can ask whether the 950 authors correctly transposed the 2000-meter clearances from 664 to sea level clearances for 950. I have had the impression that the 950 authors have always taken a very conservative approach to clearances and have invoked distances larger than those found in 664. Regards, Rich
EFT/Burst
Group, we are currently discussing with one OEM the interpretation of EFT/Burst test requirements per EN55024 and EN61000-4-4 to a printer. Specifically we are discussing the requirements of application of bursts to AC power lines. Our understanding is that they must be applied between each (single) power supply conductor and reference ground (or protective earth), as specified in EN61000-4-4 section 7.3.1. Also fig.4 and fig.11 in the same document seem to confirm this. Our OEM customer says that all combinations of phase, neutral and protective earth should be tested. They actually tested both singular AC lines and also more than one AC line. The printer passed the test in the first mode and failed in the second mode. Any comments / interpretations would be highly appreciated. Paolo Roncone Compuprint s.p.a. Italy --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
