The 108 MHz is for equipment that are intentional radiators (10th harmonic,
see 15.33 (a)(1) and
15.208 (f). For unintentional radiators it is the 5th harmonic (see 15.33
(b)(1)).
Be sure and read 15.35 (b) on the use of the proper detectors above 1000
MHz (uses 'average'
and 'peak' detectors (not a 'quasi-peak' detector).
Bob Heller
3M Product Safety, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
=================================================================================
"Pettit, Ghery"
<ghery.pettit@i To:
"'kristiaan.carpent...@alcatel.be'"
ntel.com> <kristiaan.carpent...@alcatel.be>
emc-p...@majordomo.ieee.org
03/25/2002 cc: (bcc: Robert E.
Heller/US-Corporate/3M/US)
11:50 AM Subject: RE: FCC part 15 section
109
Please respond
to "Pettit,
Ghery"
Kristiaan,
The test procedures of ANSI C63.4-2000 must be used, even when testing to
the limits in CISPR 22. The 10 meter test distance is fine, but to the
extent that the test methods differ, ANSI C63.4 must be followed. Don't
forget that if the product has a clock higher than 108 MHz, testing above 1
GHz will be required to the FCC limits. The upper frequency will depend
upon the actual maximum clock speed in the product.
Ghery Pettit
Intel
-----Original Message-----
From: kristiaan.carpent...@alcatel.be
[mailto:kristiaan.carpent...@alcatel.be]
Sent: Monday, March 25, 2002 8:41 AM
To: emc-p...@majordomo.ieee.org
Subject: FCC part 15 section 109
Hello group,
Part 15, section 109, states that as an alternative to the radiated
emission
limits shown in paragraphs (a) and (b) of this section, digital devices may
be shown to comply with CISPR22 3rd ed. Further-on is stated that the
testmethods of part 15 (referring to ANSI C63.4) apply.
Question:
If a lab performs Part 15 measurements for Class B devices below 1000MHz
according to CISPR22:1997 with
- the limits of CISPR22
- the procedures of CISPR22
- at a 10 meter distance as per CISPR22,
Are these measurements performed in an correct way?
Regards,
Kris Carpentier
<< File att1.htm not included with reply >>
-------------------------------------------
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:
Ron Pickard: emc-p...@hypercom.com
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:
http://ieeepstc.mindcruiser.com/
Click on "browse" and then "emc-pstc mailing list"
