How can I calibrate a LISN (Line Impedance Stabilization Network) or
where can I find the information on how to do so? |
Request for Question Clarification by
sgtcory-ga
on
18 May 2004 07:12 PDT
Hello Andrea,
I have a few questions for clarification :
1) Do you have a model number?
2) In which country would this be done?
3) Do you have access to a Network Analyzer and other Calibration Standards?
Thanks -
SgtCory
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Clarification of Question by
andrea806-ga
on
18 May 2004 08:06 PDT
1) The model numbers of the LISN's to be calibrated are FCC-LISN-3B
(Fischer) with type N male connectors, and 9857-50-BP-24-BNC (Solar).
2) The calibration will be done in the US.
3) I have access to an HP NWA 3577A, with an S-parameter Test set, and
I have access to calibration standards listed in MIL-STD-461D/E and
ANSI /NSCL Z540.
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Request for Question Clarification by
sgtcory-ga
on
18 May 2004 09:07 PDT
Thanks for the quick reply.
To ensure this would be done correctly, would you prefer that this
item be calibrated by a certified Calibration Lab? This usually
ensures traceability back to NIST of all standards used should any
problem arise. (Unless this is not a concern)
To answer your orignal question - you can normally find the
calibration procedure in the manufacturers adjustment/repair
publication. Then the customer determines if they need a higher amount
of accuracy (or lower) and the item is calibrated according to those
requirements, and the basic requirements of their Metrology program.
You can find Fischer on the internet here :
http://www.fischercc.com/
And Solar is located here :
http://www.solar-emc.com/
If you would like to have this done at a laboratory, please reply with
your required state, and I can find some qualified labs. I can also
attempt to contact the companies and request the pricing of their
publications if you prefer.
I may also be able to locate a procedure that meets Navy/Marine Corps
METCAL requirements, although I don't know how useful this would be in
your situation.
Thanks again -
SgtCory
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Clarification of Question by
andrea806-ga
on
18 May 2004 10:24 PDT
Well, as frustrating as this may sound, there were no publications
included with the instrumentation, other than two curves: Input
impedance, and insertion loss. There were no
repair/adjustment/calibration instructions, they mearly state that the
instrumentation needs to be sent back to them (the manufacturer) for
calibration. This is an option as well as sending them to an outside
lab. Unfortunately, that is going to cost me well over $1,000 (which,
as a college student, I cannot afford). I simply need to verify that
these boxes fall within the specified standards for calibration, so
that I can draw valid conclusions from the results of my RF research.
So, I guess what I am saying is that I don't NEED to make this
traceable back to NIST, but I would like to follow some sort of
standardized procedure, just so I have something to reference in my
report.
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Request for Question Clarification by
sgtcory-ga
on
20 May 2004 08:03 PDT
Hello,
I had these items looked up by a military calibration lab, and there
are no standing procedures in place for them. I assume they send them
off as well.
From this point, since you don't require 'a higher level of accuracy'
- the best advice I could give would be to see if you can get in touch
with the manufacturers for failing tolerance levels in their
procedures for Insertion Loss and impedance.
Then you can plot new charts taking measurements at the same points,
and apply corrections as needed for your requirements.
I wish I could have offered more help. If there is any other way I can
assist you, please let me know, and I'll do all I can to assist.
Thanks -
SgtCory
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