Keeping the step size to one-half the measurement bandwidth is an accepted way of assuring that all possible signals are captured. Using a step size equal to a measurement bandwidth is not quite as good but reasonable.
---------- >From: scott....@jci.com >To: emc-p...@majordomo.ieee.org >Subject: Stepping receiver, step sizes. >Date: Thu, Dec 6, 2001, 7:17 AM > > > Hello Group! > > I would like to ask a question regarding EMI Receiver step sizes in the > higher frequency range. > > We are performing radiated emissions testing in a semi-anechoic chamber > using an EMI receiver. We plan to cover a high frequency range between 1 > and 5 GHz (a large spanse to cover!). I would like to know what practical > step size (ie. 8kHz or 20kHz or 80kHz) I could choose for such a wide > range and keep: > 1. The data accurate, meaning that I wouldn't be "missing" or > stepping around energy by taking to large of a step. > 2. Keep the amount of data I'm collecting to a reasonable amount so > that I may process it (apply correction factors for antenna, cable loss, > pre-amplifier). > > My question comes up primarily because I haven't found any specifications > that require things like minimum scan time, maximum step size, or the like. > > Is anyone aware of a specification out there that covers this, or have any > information/personal experience that could help me make a determination? > > > Thanks for any help in advance! > > > Regards, > > Scott Mee > EMC Engineer > > Johnson Controls Inc. > PH: 616.394.2565 > EMAIL: scott....@jci.com > > > ------------------------------------------- > 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: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: pstc_ad...@garretson.org > Dave Heald davehe...@mediaone.net > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > No longer online until our new server is brought online and the old > messages are imported into the new server. > ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
