Greetings all:
I have a requirement to test the performance of ferrite bead (one that
that can fit over a power cord) to 500MHz for qualification of
alternate vendors.
I have an impedance analyser - but it only goes to 40MHz. Does anyone
have a good way to verify ferrite impedance.??
Thanks
emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Grasso, Charles
Sent: Friday, December 19, 2003 11:28 AM
To: 'Chris Maxwell'; 'Ken Javor'; 'Price, Ed'; 'emc-p...@majordomo.ieee.org'
Subject: RE: Measuring a ferrite performance
Well C
omo.ieee.org'
Subject: RE: Measuring a ferrite performance
Well Chris - There is a long story attached to this requirement. Let me
summarize:
1. We manufacture a significant number of settopboxes for satellite TV. I
hesitate
to put actual numbers in public - lets just say a sh*t load. Cost there
Ed; Grasso, Charles; emc-p...@majordomo.ieee.org
Subject: RE: Measuring a ferrite performance
As usual, this thread has been very educational, the mere asking of the
question has unleashed many answers, from which I have gained in my own
knowledge. The most practical question that I would ask is:
: Thursday, December 18, 2003 7:40 PM
To: Price, Ed; 'Grasso, Charles'; 'emc-p...@majordomo.ieee.org'
Subject: Re: Measuring a ferrite performance
As usual, Ed's advice is practical and economical to implement. I would add
the following to make it more comprehensive.
t Price, Ed
Sent: 19 December, 2003 09:10
To: emc-p...@majordomo.ieee.org
Subject: RE: Measuring a ferrite performance
-Original Message-
From: Chris Maxwell [ mailto:chris.maxw...@nettest.com]
Sent: Friday, December 19, 2003 6:29 AM
To: Ken Javor; Price, Ed; Grasso, Charles; emc-p..
>-Original Message-
>From: John Woodgate [ mailto:j...@jmwa.demon.co.uk]
>Sent: Friday, December 19, 2003 5:32 AM
>To: emc-p...@majordomo.ieee.org
>Subject: Re: Measuring a ferrite performance
>
>
>
>I read in !emc-pstc that Price, Ed wrote (in
>
-Original Message-
From: Chris Maxwell [ mailto:chris.maxw...@nettest.com]
Sent: Friday, December 19, 2003 6:29 AM
To: Ken Javor; Price, Ed; Grasso, Charles; emc-p...@majordomo.ieee.org
Subject: RE: Measuring a ferrite performance
As usual, this thread has been very educational
As usual, this thread has been very educational, the mere asking of the
question has unleashed many answers, from which I have gained in my own
knowledge. The most practical question that I would ask is:
Why the h___ would your component engineering group want you to measure the
impedance of a
I read in !emc-pstc that Cortland Richmond <72146@compuserve.com>
wrote (in <200312181715_mc3-1-6123-8...@compuserve.com>) about
'Measuring a ferrite performance' on Thu, 18 Dec 2003:
>This of course does not tell you the
>impedance of beads, only attenuation in
I read in !emc-pstc that Price, Ed wrote (in
) about
'Measuring a ferrite performance' on Thu, 18 Dec 2003:
>2. Decide on system impedance. If 50 ohms is OK, then just connect
>a 3 dB attenuator to each of the coax connectors. If you want
>another impedance, t
rles'" ,
"'emc-p...@majordomo.ieee.org'"
Subject: RE: Measuring a ferrite performance
-Original Message-
From: Grasso, Charles [mailto:charles.gra...@echostar.com]
Sent: Thursday, December 18, 2003 9:40 AM
To: 'emc-p...@majordomo.ieee.org'
Charles Grasso asked,
>> I have a requirement to test the performance of ferrite bead (one that
that can fit over a power cord) to 500MHz for qualification of alternate
vendors.
I have an impedance analyser - but it only goes to 40MHz. Does anyone have
a good way to verify ferrite impedance.??
>>>>>><
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Gary McInturff
Sent: Thursday, December 18, 2003 12:59 PM
To: 'Price, Ed'; 'Grasso, Charles'; 'emc-p...@majordomo.ieee.org'
Subject: RE: Measuring a fe
Don't buy a 500 MHz analyzer. You'll end up having an analyzer that still
won't be what you may need. Rent it for the ferrite test, and later buy a
decent network analyzer :) It is possible to find decent used equipment that
isn't terribly expensive (in relative terms) these days.
Neven
>
> At t
Don't buy a 500 MHz analyzer. You'll end up having an analyzer that still
won't be what you may need. Rent it for the ferrite test, and later buy a
decent network analyzer :) It is possible to find decent used equipment that
isn't terribly expensive (in relative terms) these days.
Neven
>
> At t
HI Chas,
I have a Network analyser that will go to 500 MHz...
Derek.
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Sent: Thursday, December 18, 2003 11:43 AM
To: 'Grasso, Charles'; 'emc-p...@majordomo.ieee.org'
Subject: RE: Measuring a ferrite performance
-Original Message-
From: Grasso, Charles [ mailto:charles.gra...@echostar.com]
Sent: Thursday, December 18, 2003 9:40 AM
To
:
mo.ieee.org Subject: RE: Measuring a
ferrite performance
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of robert Macy
Sent: Thursday, December 18, 2003 11:40 AM
To: Grasso, Charles; emc-p...@ieee.org
Subject: Re: Measuring a ferrite performance
At the risk of collecting the ire of the instrument
manufacturers, look at buying an "up to 5
-Original Message-
From: Grasso, Charles [ mailto:charles.gra...@echostar.com]
Sent: Thursday, December 18, 2003 9:40 AM
To: 'emc-p...@majordomo.ieee.org'
Subject: Measuring a ferrite performance
Greetings all:
I have a requirement to test the performance of ferrite
At the risk of collecting the ire of the instrument
manufacturers, look at buying an "up to 500MHz" network
analyzer. Do an in house demonstration.
- Robert -
Robert A. Macy, PE .. m...@california.com
408 286 3985 . . . .. . . fx 408 297 9121
AJM International E
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