Measurement Uncertainty

2002-06-14 Thread khardin
Dear All: I am looking for the most accurate measuring device to determine the amplitude of a RF sine wave with the lowest possible uncertainty . For now lets assume I am trying to measure a 80dBuV sine wave between 30MHz to 1GHz from a 50 ohm source and other signal componets not at the

Re: Conducted noise emission diagnosis device

2002-02-05 Thread khardin
Dear Muriel, The Differential- or Common-mode Box design is in the IEEE Transactions on EMC, Vol. 30, No.4, November 1988, pages 553-560. Figure 2 shows the schematic and Figure 3 has an inside picture. The box is very easy to make. It is made from two transformers, two resistors, and a

24'x20'x12' Chamber for sale

2001-04-05 Thread khardin
Used Lindgren RF Enclosures Double Electrically Isolated RF Screen Room with semi or fully anachoic absorber for sale. Shielded enclosure outer dimensions are 24'W x 20'D x 12' H. Three Steel beam roof support structure 15' H. The facility currently has Rantec 4'x2'x2' absorber on walls and

RE: Dithered clocks and EMC - BEWARE

2000-03-17 Thread khardin
Scott, Sorry to hear about your experience but we have had great success using Spread Spectrum Clock Generation (SSCG) since 1994 and have shipped many millions of units. Most PC's built over the last 2 to 3 years also use this technology. For back ground information, see

Debugging EN61000-4-2 Techniques

2000-03-04 Thread khardin
I have a difficult ESD problem and I am looking for measurement methods to help isolate the error. Think of electronic logic card mounted to unshielded metal chassis. An ESD is discharged to the chassis causing a logic error. Typically the symptoms of the failure are sufficient to determine

Re: NEAR/ FAR FIELD CORRELATION ISSUES

1999-06-18 Thread khardin
Arun: I agree that a lower cost and simpler method would be nice but you have a very difficult problem to solve. Your basic problem is correlating to an OATS site. Theoretically this is possible using the equivalence principle but it is hard to do. First one must create a surface that totally

Who has 10m CISPR 22 Semi-Anechoic Chambers

1998-07-31 Thread khardin
Hello All, I am trying to compile a list of companies and locations that have 10m Semi-Anechoic Chambers. Does anyone know of a list that may exist or just please send me a note if you have one? Thanks, Keith Hardin Lexmark International Inc. email: khar...@lexmark.com

spread spectrum oscillator

1998-07-10 Thread khardin
Richard, Some of the publications on Spread Spectrum Clock Generators have been posted on our web site at http://www.lexmark.com/sscg. Intel has also posted some information on their developers web site at http://developer.intel.com/ial/sdt/. Finally, you can get information on a variety of