Thanks Ghery.. Best Regards Charles Grasso Senior Compliance Engineer Echostar Communications Corp. Tel: 303-706-5467 Fax: 303-799-6222 Cell: 303-204-2974 Email: charles.gra...@echostar.com; <mailto:charles.gra...@echostar.com; >
Email Alternate: chasgra...@ieee.org <mailto:chasgra...@ieee.org> -----Original Message----- From: Pettit, Ghery [mailto:ghery.pet...@intel.com] Sent: Wednesday, November 27, 2002 5:08 PM To: Grasso, Charles; emc-p...@majordomo.ieee.org Subject: RE: New FCC Conducted Emissions question Charles, They've already done it. §15.107 Conducted limits. (a) Except for Class A digital devices, for equipment that is designed to be connected to the public utility (AC) power line, the radio frequency voltage that is conducted back onto the AC power line on any frequency or frequencies within the band 150 kHz to 30 MHz shall not exceed the limits in the following table, as measured using a 50 mH/50 ohms line impedance stabilization network (LISN). Compliance with the provisions of this paragraph shall be based on the measurement of the radio frequency voltage between each power line and ground at the power terminal. The lower limit applies at the band edges. Frequency of Conducted limit (dBmV) emission (MHz) Quasi-peak Average 0.15-0.5 66 to 56* 56 to 46* 0.5-5 56 46 5-30 60 50 * Decreases with the logarithm of the frequency. (b) For a Class A digital device that is designed to be connected to the public utility (AC) power line, the radio frequency voltage that is conducted back onto the AC power line on any frequency or frequencies within the band 150 kHz to 30 MHz shall not exceed the limits in the following table, as measured using a 50 mH/50 ohms LISN. Compliance with the provisions of this paragraph shall be based on the measurement of the radio frequency voltage between each power line and ground at the power terminal. The lower limit applies at the boundary between the frequency ranges. Frequency of Conducted limit (dBmV) emission (MHz) Quasi-peak Average 0.15-0.5 79 66 0.5-30 73 60 (c) The limits shown in paragraphs (a) and (b) of this section shall not apply to carrier current systems operating as unintentional radiators on frequencies below 30 MHz. In lieu thereof, these carrier current systems shall be subject to the following standards: (1) For carrier current systems containing their fundamental emission within the frequency band 535-1705 kHz and intended to be received using a standard AM broadcast receiver: no limit on conducted emissions. (2) For all other carrier current systems: 1000 mV within the frequency band 535-1705 kHz, as measured using a 50 mH/50 ohms LISN. (3) Carrier current systems operating below 30 MHz are also subject to the radiated emission limits in §15.109(e). (d) Measurements to demonstrate compliance with the conducted limits are not required for devices which only employ battery power for operation and which do not operate from the AC power lines or contain provisions for operation while connected to the AC power lines. Devices that include, or make provision for, the use of battery charges which permit operating while charging, AC adaptors or battery eliminators or that connect to the AC power lines indirectly, obtaining their power through another device which is connected to the AC power lines, shall be tested to demonstrate compliance with the conducted limits. Section 15.37 (j) All radio frequency devices that are authorized under the certification, verification or declaration of conformity procedures on or after July 12, 2004 shall comply with the conducted limits specified in §15.107 or §15.207 as appropriate. All radio frequency devices that are manufactured or imported on or after July 11, 2005 shall comply with the conducted limits specified in §15.107 or §15.207, as appropriate. Equipment authorized, imported or manufactured prior to these dates shall comply with the conducted limits specified in §15.107 or §15.207, as appropriate, or with the conducted limits that were in effect immediately prior to September 9, 2002. Ghery Pettit -----Original Message----- From: Grasso, Charles [mailto:charles.gra...@echostar.com] Sent: Wednesday, November 27, 2002 2:42 PM To: emc-p...@majordomo.ieee.org Subject: New FCC Conducted Emissions question Hi All, I understand that the FCC will be adopting the CISPR conducted emissions test levels. Also, I believe that there is a grandfathering clause. I have some q's for the group: a) Is there and a grandfathering clause & for how long? b) When did the clock start? For anyone with access to CISPR 22 a) Is the measurment BWs the same as the FCC b) Doen't this require a new LISN? Best Regards Charles Grasso Senior Compliance Engineer Echostar Communications Corp. Tel: 303-706-5467 Fax: 303-799-6222 Cell: 303-204-2974 Email: charles.gra...@echostar.com; <mailto:charles.gra...@echostar.com; > Email Alternate: chasgra...@ieee.org <mailto:chasgra...@ieee.org>
