Is the problem in Horizontal or Vertical? Is the site high or low? Where in the 1 to 4 meters is it maximum? What type of antennas are used? What does the graph look like from 35 to 60 MHz? What is the size of the turntable? (30 MHz is fairly large compared with most turntables). Can compliant results be repeated when moving the other antenna to the side and leaving the one on the turntable fixed? Ok that is enough. Now one suggestion.
Try laying metal sheets or screen over the turntable area to further conclude the culprit. Regards, Dale Albright EMCI To -----Original Message----- From: WOODS, RICHARD <wo...@sensormatic.com> To: 'emc-pstc' <emc-p...@majordomo.ieee.org> List-Post: emc-pstc@listserv.ieee.org Date: Friday, July 16, 1999 4:55 PM Subject: NSA > >Argh! For the first time in five years, our NSA is out of spec on our 3 >meter OATS at 30 MHz. The problem appears to be the turn table. We can move >the equipment off of the table to one side or toward the front and comply, >so it does not appear to be an off site reflection problem. We have replaced >marginal brushes from the table to the ring and we have added wide copper >ground strips from the ring (attached with screws) to the ground screen >(soldered). Still won't pass. Suggestions? > >--------- >This message is coming from the emc-pstc discussion list. >To cancel your subscription, send mail to majord...@ieee.org >with the single line: "unsubscribe emc-pstc" (without the >quotes). For help, send mail to ed.pr...@cubic.com, >jim_bac...@monarch.com, ri...@sdd.hp.com, or >roger.volgst...@compaq.com (the list administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
