Do you need to look at non-fundamental, non-harmonic emissions as well? There will be such emissions as well. Some will be visible with the source in CW mode, but there will be others that appear only during frequency hopping. These latter emissions are harder to find since their frequencies are not known well. They can appear in band or out of the band of operation. The techniques described in other postings still apply.
Don Borowski Schweitzer Engineering Labs Pullman, WA "Low, Aaron S" <[email protected]>@majordomo.ieee.org on 03/19/2003 07:43:49 AM Please respond to "Low, Aaron S" <[email protected]> Sent by: [email protected] To: [email protected] cc: Subject: antenna port conducted emissions Folks, I am interested in your opinions regarding antenna port conducted emissions (MIL-STD-461D CE106) on a spread spectrum/frequency hopping device. Is it practical to automatically measure (using a swept scan EMI receiver) emissions from such a device? I would think that when using spread spectrum and a swept scan receiver, the receiver has some large probability of missing the emissions caused by a particular harmonic when using swept scanning systems. The limit for CE106 (transmitters) is derived from the power of the fundamental (there is no fundamental, only a band of operation), how do you measure that power on the EMI receiver? Does anyone have any experience/advice they would be willing to part with? Thanks Aaron Low ps. I am relatively new to this field, so my question may seem very basic to many of you; please excuse me. This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
