What would that method be? 
Mat

> -----Original Message-----
> From: Gorodetsky, Vitaly [SMTP:[email protected]]
> Sent: Wednesday, May 05, 1999 6:22 PM
> To:   'Flinders, Randall'; 'Hans Mellberg'; 'emc-pstc'
> Subject:      RE: Precompliance Testing
> 
> In stationary case, such as OATS, there's a relatively inexpensive way of
> automatic cancelling ambients out .
> 
>       -----Original Message-----
>       From:   [email protected]
> [SMTP:[email protected]]
>       Sent:   Wednesday, May 05, 1999 12:23 PM
>       To:     'Hans Mellberg'; 'emc-pstc'
>       Subject:        RE: Precompliance Testing
> 
>       I second that opinion.  My experience shows SEVERE ambient issues
> with rooftop sites.
>       -- 
>       Sincerely,
> 
>       Randall T. Flinders
>       EMC Engineer
>       Emulex Network Systems
>       V: (714) 513-8012
>       F: (714) 513-8265
>       [email protected]
>       ______   ______
>       ______\ /______
>       ______/ \______
>       E  M  U  L  E  X
> 
>       Chairman
>       Orange County Chapter
>       IEEE EMC Society
>       [email protected]
> 
> 
> 
>               ----------
>               From:   Hans Mellberg
>               Sent:   Wednesday, May 05, 1999 7:59 AM
>               To:     [email protected]; [email protected];
> Gary McInturff
>               Cc:     'Brent DeWitt'; Allen Tudor; [email protected]
>               Subject:        Re: Precompliance Testing
> 
> 
> 
>               Before you put a rooftop OATS, (assuming you are not located
> in Easter
>               Island or the Caribean Islands!) you are going to deal with
>               substantially higher ambient signals. It so happens that
> when you need
>               a stronger signal, a common practice is to raise the
> antenna! I have
>               battled those problems twice in my past and I would not
> reccomend
>               rooftop OATS anymore.
> 
> 
>               --- [email protected] wrote:
>               > May I add a note of caution:
>               > It may be worthwhile to check the permissible
>               > loading of the roof, especially
>               > when you are in the Southwest where roofs are mostly
>               > for shade and a few drops
>               > of rain. I guess that you don't want to appear
>               > suddenly in the conference room
>               > below....
>               > Bogdan.
>               > 
>               > Gary McInturff wrote:
>               > 
>               > > I'll agree with Brent, and others, the headaches
>               > of a metal room or the
>               > > metal studs et al, in a building are going to make
>               > you pull your hair out.
>               > > But there is an alternative to the parking lot.
>               > You may want to consider the
>               > > roof. The ground reference can be put up there as
>               > well, especially if you
>               > > are doing pre-compliance stuff. You don't have to
>               > give up parking space -
>               > > which is sure to irate somebody. The roof gets a
>               > little hot, but that only
>               > > gives you the opportunity to work in your cutoffs,
>               > and showing up to a
>               > > meeting with the suits dressed like this is always
>               > good for a laugh!
>               > > Gary
>               snip
> 
>               ===
>               Best Regards
>               Hans Mellberg
>               EMC Consultant
>               _________________________________________________________
>               Do You Yahoo!?
>               Get your free @yahoo.com address at http://mail.yahoo.com
> 
> 
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