Dear All,
Thank you for all your inputs. I've had success today by reducing to 9 points.
All the points are within the requirement.
Sent from Wendy.Nya iPhone
On Sep 28, 2011, at 12:14 AM, Derek Walton <lfresea...@aol.com> wrote:
HI Wendy,
your chamber size is fine: we have successfully verified chambers
smaller than this.
I suggest a few things:
Don't scrimp on the size of the floor patch.
If you are using wood to hold your field probe, change to plastic.
Don't let the probe get near any dielectric material.
Make sure the probe always stays in the same orientation
If you are trying to calibrate at low fields: don't. You must make sure
your field probes give sensible numbers at all times.
Make sure your power meters and amplifiers are linear over the
calibration range.
Make sure you are allowing the power meter time to settle.
Use the smallest antenna that will cover your frequency range.
Offset the antenna and UFP a little off centre if you can, a slight
angle helps.
Use good software.
Now, if these dont work, you might need outside help.
Sincerely,
Derek Walton
L F Research.
-----Original Message-----
From: WNya <wendy...@yahoo.com>
To: Julian Jones <ju...@hursley-emc.co.uk>
Cc: Charlie Blackham <emcp...@sulisconsultants.com>;
<EMC-PSTC@LISTSERV.IEEE.ORG> <EMC-PSTC@LISTSERV.IEEE.ORG>
Sent: Tue, Sep 27, 2011 9:48 am
Subject: Re: [PSES] Still on Radiated Immunity
I believe my chamber is 7m long, 4m wide and 4m high (externally
dimensions).
It is a partial lined TDK chamber.
Sent from Wendy.Nya iPhone
On Sep 27, 2011, at 10:33 PM, "Julian Jones" <
<mailto:ju...@hursley-emc.co.uk> ju...@hursley-emc.co.uk> wrote:
I haven't had any luck using a chamber less than 7x5x4 m
Julian Jones
07787 523607
On 27 Sep 2011, at 15:05, "Charlie Blackham" <
<mailto:emcp...@sulisconsultants.com> <mailto:emcp...@sulisconsultants.com>
emcp...@sulisconsultants.com> wrote:
Wendy
Have you considered a smaller one? - you can use
smaller UFA if EUT size
permits.
Regards
Charlie
-----Original Message-----
From: WNya [ <mailto:wendy...@yahoo.com>
<mailto:wendy...@yahoo.com> <mailto:wendy...@yahoo.com>
mailto:wendy...@yahoo.com]
Sent: 27 September 2011 15:10
To: Charlie Blackham
Cc: < <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] Still on Radiated Immunity
The UFA is as per the standard, 1.5x1.5m, 0.8m above GRP
Sent from Wendy.Nya iPhone
On Sep 27, 2011, at 9:44 PM, "Charlie Blackham"
< <mailto:emcp...@sulisconsultants.com>
<mailto:emcp...@sulisconsultants.com> emcp...@sulisconsultants.com> wrote:
> Wendy
>
> What size UFA (uniform field area) are you trying to
create?
> What size are your EUT (i.e. what sixe UFA do you
need?)
>
> Regards
> Charlie
>
> -----Original Message-----
> From: WNya [ <mailto:wendy...@yahoo.com>
<mailto:wendy...@yahoo.com> <mailto:wendy...@yahoo.com>
mailto:wendy...@yahoo.com]
> Sent: 27 September 2011 14:28
> To: <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
EMC-PSTC@LISTSERV.IEEE.ORG
> Subject: [PSES] Still on Radiated Immunity
>
> Dear EMC Experts,
>
> I have a 4x3m chamber. I encounter much difficulty to
calibrate the
chamber
> every year. I am using a Schwarzbeck 9128DS and a AR
systems.
>
> Does anyone know any 'tricks' to 'tweak' the chamber
to perfection?
>
> PS: PAMP is 250W, up to 1GHz.
>
> Sent from Wendy.Nya iPhone
>
> -
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