HP Vectra computer has very good margin. That is what I use. I have more trouble with monitors than computers. I found the NEC Multisync XV17+ monitor is very good. HP Inkjet printers have been a good quiet peripheral in the past but a Deskjet 680C I recently tested had high peak levels when the printer loaded and ejected paper. These emissions would quasipeak well within the limits but I like to find peripherals that has good PEAK margins. We have a 10 meter semi-anachoic chamber for performing automated emissions testing. If we are testing a peripheral, the testing goes a lot faster if the necessary non-EUTs has very low PEAK emissions.
If anyone else has additional recommendations for quiet computers, peripherals, and add-on cards please let me know. I want to compile a list and make it available on the internet (unless it already exists). I would even consider testing for free a limited number of peripherals to add to the list if the manuafacturer would provide a "production" unit for testing. Good idea? Bad idea? Let me know what you think. Brian Kunde Compliance Testing Center LECO Corp [email protected] 616-982-5423 Greetings, I have seen this discussion before and I apoligize in advance if I am re-hashing old information. I have a computer peripheral which needs to be FCC Class B ceritfied. I have tried several host computers and the hosts tend to have "poor" margins (i.e. less than 0). The peripheral is low speed and plugs into the serial port. So far we have seen no difference in emission level whether it is on or off. Does anyone have a recommendation for a "golden" computer which actually meets the FCC Class B limits with some margin (>6dB)? Am I better off using one right out of the box rather than one that has been on someones desk for awhile? Thanks in advance Jim Nadolny AMP Inc. [email protected]
