Read other posts in the "Elephant in the Test Room" series here.Recap On this ThreadThe room: MIL-STD RF immunity testing – 1-18GHz 200v/mThe elephant: everyone in the room is aware that a significant fraction of the ‘calibrated’ 200v/m test field is actually created at the wrong test frequency.The culprit: notoriously high ‘start of band’ harmonics produced by all octave band … [Read more...]
Elephants in the Test Room #1 Continued – Further Expansion on the Culprit
Read other posts in the "Elephant in the Test Room" series here.Recap on this thread:The room: - MIL-STD RF immunity testing – 1-18GHz 200v/mThe elephant: everyone in the room is aware that a significant fraction of the ‘calibrated’ 200v/m test field is actually created at the wrong test frequency.The culprit: notoriously high ‘start of band’ harmonics produced by all octave … [Read more...]
Elephants in the Test Room
Read other posts in the "Elephant in the Test Room" series here. I apologize for the prolonged absence, my attention was drawn elsewhere for a while – back in the saddle now for the foreseeable future at a rate of at least one blog post per month.For this new raft of posts, I decided to highlight open EMC controversies that everyone seems to know about, yet few talk about. I … [Read more...]
Upcoming Revision to the Medical Standard
We asserted last time that the existing amplifiers in the current test set up might be used to generate the higher stress levels if the test distance was reduced from 3 meters to 1 meter. As a reminder, we argued that testing at 1 meter means testing takes place in the near field as is the case for the threats faced by medical equipment (nearby cellphones etc.). Using the same … [Read more...]
Part II: The Impact of the Upcoming Medical RF Immunity Revision
The test-house manager’s perspective continued: At well over a quarter of a million dollars just to replace the existing 26-1000MHz amplifier and the same again to cover 1-6GHz at 200W (will take two amplifiers), the test manager will need to justify half a million dollars for the amplifiers alone. And the total will likely rise to around $600,000 or more with other equipment … [Read more...]
Impact of the Upcoming Medical RF Immunity Revision
As indicated last time, there are two key parties with a vested interest in the outcome of the upcoming Medical RF immunity revision:The test house manager who has to justify an upgrade to his test system to the people holding the purse strings.His customer, the company wishing to sell medical equipment compliant with the revised standard.I shall add a third … [Read more...]
