John, MY HP 8591EM will in fact perform average measurements. The manual makes specific reference to CISPR 11 and CISPR 16 for compliances. The analyzer is rated to 1.8 GHz. The HP 8593 series goes even higher.
Scott [email protected] -----Original Message----- From: [email protected] [SMTP:[email protected]] Sent: Wednesday, September 08, 1999 4:37 AM To: [email protected] Subject: Average Measurements above 1 GHz I recently put out a question on measurements above I GHz. I got several replies for which many thanks. The recommendations were to try several suppliers for pre-amps. These included HP 8449, Miteq (low noise amps) and TEC in Mountain View. We actually used two Mini Circuits preamps in series which have enabled us to gain the necessary gain and noise figure. Now that we can carry out measurements at 3m I have another question. How to perform average measurements above 1 GHz. Most analyzers do not appear to have a specific CISPR compliant average function. So how is the average measurement carried out? Use of the average detector could yield a few dB lower levels even for a narrowband emission. As a point of information I note that the proposal for CISPR 22 measurements above 1 GHz does not allow the use of an average detector. This could pose eventual problems for manufacturers as it represents a considerable tightening on the current FCC limits. I would be most grateful for any information on carrying out compliant average measurements. Regards John Cronin ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
