Bonjour de Montréal,

This is true, but don't forget that if your product uses or generate frequencies over 108 MHz you will have to test over 1 GHz using the ANSI C63.4 Standard and Part 15 limits. The FCC limit can go up to 40 GHz according to the following table:

9 KHz to  1,705 MHz /                   30 MHz
1,705 to 108 MHz /                      1 GHz
108 to 500 MHz /                        2 GHz
500 to 1000 MHz/                        5 GHz
> 1 GHz /                               5th harmonic up to 40 GHz

Best regards,



At 03:13 PM 10/19/2000 -0400, [email protected] wrote:

FCC Pt15 states that you can use their limits or, alternatively, the limits
found in CISPR 22:1995.  Your EN Class B data should be sufficient for
having your lab generate an FCC B (or A) report.

Jack

-----Original Message-----
From: Colgan, Chris [mailto:[email protected]]
Sent: Thursday, October 19, 2000 4:51 AM
To: 'Emc-Pstc' (E-mail)
Subject: RE: EN55022 vrs. FCC Part 15



No.
The class B FCC limits for conducted disturbance at the mains ports are
lower than EN55022 class B.
QP limits:
FCC - 0.45 to 30MHz = 48dBuV
EN - 0.15 to 0.5MHz = 66 to 56dBuV (decreasing linearly with the log of
frequency)
       0.5 to 5MHz = 56dBuV
       5 to 30MHz = 60dBuV
Radiated disturbance is performed at 3m for FCC and 10m for EN55022.  The
limits and are different.
QP limits:
FCC @ 3m - 30 to 88MHz = 34dBuV/m
                   88 to 216MHz = 37.5dBuV/m
                   216 to 960MHz = 40dBuV/m
                   960 to 1000MHz = 48dBuV/m
EN @ 10m - 30 to 230MHz = 30dBuV/m
                   230 to 1000MHz = 37dBuV/m

I'm afraid the only way to compare the two standards is to buy copies of
them.

Chris Colgan
EMC & Safety
> TAG McLaren Audio Ltd
The Summit, Latham Road
Huntingdon, Cambs, PE29 6ZU
United Kingdom
> * Phone: +44 (0)1480 415627
> * Fax:     +44 (0)1480 415689
> * Mailto:[email protected]
> * http://www.tagmclarenaudio.com
>
>
>
> -----Original Message-----
> From: Keith Zell [SMTP:[email protected]]
> Sent: 18 October 2000 14:53
> To:   [email protected]
> Subject:      EN55022 vrs. FCC Part 15
>
>
> Will a product certified to EN55022 class B necessarily comply to FCC Part
> 15 Class A limits?  Where might I find a valid comparison of these two EMC
> standards.
>
> As always, thanks for your help.
>
> B. Keith Zell
> Electrical Design Engineer
> PMI Food Equipment Group
> Troy, OH 45374
> (937) 332-3067 (ph)
> (937) 332-3007 (fax)
> [email protected]


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